[2896] | 1 | #include "DeferredRenderer.h"
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[2859] | 2 | #include "FrameBufferObject.h"
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| 3 | #include "RenderState.h"
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| 4 | #include "SampleGenerator.h"
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[2860] | 5 | #include "Vector3.h"
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| 6 | #include "Camera.h"
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[2884] | 7 | #include "shaderenv.h"
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[2886] | 8 | #include "Halton.h"
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[2895] | 9 | #include "ShadowMapping.h"
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[2952] | 10 | #include "Light.h"
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[3057] | 11 | #include "ShaderManager.h"
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[3213] | 12 | #include "Texture.h"
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| 13 |
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[3198] | 14 | #include <math.h>
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[2858] | 15 |
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[3003] | 16 | #include <IL/il.h>
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| 17 | #include <assert.h>
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[2859] | 18 |
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[3003] | 19 |
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[3021] | 20 | #ifdef _CRT_SET
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| 21 | #define _CRTDBG_MAP_ALLOC
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| 22 | #include <stdlib.h>
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| 23 | #include <crtdbg.h>
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| 24 |
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| 25 | // redefine new operator
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| 26 | #define DEBUG_NEW new(_NORMAL_BLOCK, __FILE__, __LINE__)
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| 27 | #define new DEBUG_NEW
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| 28 | #endif
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| 29 |
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| 30 |
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[2858] | 31 | using namespace std;
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| 32 |
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| 33 |
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[3003] | 34 | static void startil()
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| 35 | {
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| 36 | ilInit();
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| 37 | assert(ilGetError() == IL_NO_ERROR);
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| 38 | }
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| 39 |
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| 40 |
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| 41 | static void stopil()
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| 42 | {
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| 43 | ilShutDown();
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| 44 | assert(ilGetError() == IL_NO_ERROR);
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| 45 | }
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| 46 |
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[3198] | 47 |
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[2858] | 48 | namespace CHCDemoEngine
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| 49 | {
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| 50 |
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[3026] | 51 | static ShaderProgram *sCgSsaoProgram = NULL;
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| 52 | static ShaderProgram *sCgGiProgram = NULL;
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[2873] | 53 |
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[3026] | 54 | static ShaderProgram *sCgDeferredProgram = NULL;
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| 55 | static ShaderProgram *sCgAntiAliasingProgram = NULL;
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| 56 | static ShaderProgram *sCgDeferredShadowProgram = NULL;
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[2859] | 57 |
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[3026] | 58 | static ShaderProgram *sCgCombineSsaoProgram = NULL;
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| 59 | static ShaderProgram *sCgCombineIllumProgram = NULL;
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| 60 | static ShaderProgram *sCgLogLumProgram = NULL;
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| 61 | static ShaderProgram *sCgToneProgram = NULL;
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| 62 | static ShaderProgram *sCgDownSampleProgram = NULL;
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[3137] | 63 | static ShaderProgram *sCgScaleDepthProgram = NULL;
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[3155] | 64 | static ShaderProgram *sCgPrepareSsaoProgram = NULL;
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[3213] | 65 | static ShaderProgram *sCgLenseFlareProgram = NULL;
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[2869] | 66 |
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[3232] | 67 | static ShaderProgram *sCgDOFProgram = NULL;
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[2992] | 68 |
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[3232] | 69 |
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[3129] | 70 | static GLuint noiseTex2D = 0;
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| 71 | static GLuint noiseTex1D = 0;
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[2865] | 72 |
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[3128] | 73 |
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[2859] | 74 | // ssao random spherical samples
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[3246] | 75 | static Sample2 samples2[NUM_SAMPLES];
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| 76 | //#define NUM_PRECOMPUTED_SAMPLES 240
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| 77 | //static Sample2 samples2[NUM_PRECOMPUTED_SAMPLES];
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[3232] | 78 | // pcf samples
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[3103] | 79 | static Sample2 pcfSamples[NUM_PCF_TABS];
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[3232] | 80 | // dof samples
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| 81 | static Sample2 dofSamples[NUM_DOF_TABS];
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[2966] | 82 |
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[3026] | 83 |
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[3167] | 84 | static float ssaoFilterOffsets[NUM_SSAO_FILTER_SAMPLES * 2];
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| 85 | static float ssaoFilterWeights[NUM_SSAO_FILTER_SAMPLES];
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[3103] | 86 |
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[3214] | 87 | static Texture *sHaloTex[5];
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[3103] | 88 |
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[3118] | 89 | int DeferredRenderer::colorBufferIdx = 0;
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[2859] | 90 |
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[2992] | 91 |
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[3212] | 92 |
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| 93 |
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[3085] | 94 | /** Helper method that computes the view vectors in the corners of the current view frustum.
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| 95 | */
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| 96 | static void ComputeViewVectors(PerspectiveCamera *cam, Vector3 &bl, Vector3 &br, Vector3 &tl, Vector3 &tr)
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| 97 | {
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| 98 | Vector3 ftl, ftr, fbl, fbr, ntl, ntr, nbl, nbr;
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| 99 | cam->ComputePoints(ftl, ftr, fbl, fbr, ntl, ntr, nbl, nbr);
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| 100 |
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| 101 | bl = Normalize(nbl - fbl);
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| 102 | br = Normalize(nbr - fbr);
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| 103 | tl = Normalize(ntl - ftl);
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| 104 | tr = Normalize(ntr - ftr);
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| 105 | }
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| 106 |
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| 107 |
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[3025] | 108 | static float GaussianDistribution(float x, float y, float rho)
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| 109 | {
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[3110] | 110 | float g = 1.0f / sqrtf(2.0f * M_PI * rho * rho);
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[3133] | 111 | g *= expf( -(x * x + y * y) / (2.0f * rho * rho));
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[3025] | 112 |
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| 113 | return g;
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| 114 | }
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| 115 |
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| 116 |
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[2859] | 117 | static void PrintGLerror(char *msg)
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| 118 | {
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| 119 | GLenum errCode;
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| 120 | const GLubyte *errStr;
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| 121 |
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| 122 | if ((errCode = glGetError()) != GL_NO_ERROR)
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| 123 | {
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| 124 | errStr = gluErrorString(errCode);
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| 125 | fprintf(stderr,"OpenGL ERROR: %s: %s\n", errStr, msg);
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| 126 | }
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| 127 | }
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| 128 |
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| 129 |
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[3206] | 130 | static Sample2 UnitTest(float x, float y, int wi, int he)
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[3198] | 131 | {
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| 132 | Sample2 s;
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| 133 |
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| 134 | s.x = float(floor(x * (float)wi - 0.5f) + 1.0f) / (float)wi;
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| 135 | s.y = float(floor(y * (float)he - 0.5f) + 1.0f) / (float)he;
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| 136 |
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| 137 | return s;
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| 138 | }
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| 139 |
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| 140 |
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[3134] | 141 | static void ComputeSampleOffsets(float *sampleOffsets,
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| 142 | int imageW, int imageH,
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| 143 | float width,
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| 144 | int samples)
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| 145 | {
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| 146 | const float xoffs = width / (float)imageW;
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| 147 | const float yoffs = width / (float)imageH;
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[3017] | 148 |
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[3134] | 149 | const int numSamples = (int)sqrt((float)samples);
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| 150 | const int startSamples = -numSamples / 2;
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| 151 | const int endSamples = numSamples + startSamples - 1;
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| 152 | //cout << startSamples << " " << endSamples << endl;
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[2976] | 153 |
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[3134] | 154 | int idx = 0;
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[3017] | 155 |
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[3134] | 156 | for (int x = startSamples; x <= endSamples; ++ x)
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[3017] | 157 | {
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[3134] | 158 | for (int y = startSamples; y <= endSamples; ++ y)
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[3017] | 159 | {
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[3134] | 160 | sampleOffsets[idx + 0] = (float)x * xoffs;
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| 161 | sampleOffsets[idx + 1] = (float)y * yoffs;
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[3017] | 162 | idx += 2;
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| 163 | }
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| 164 | }
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| 165 | }
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| 166 |
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[3026] | 167 |
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[3132] | 168 | void DeferredRenderer::FlipFbos(FrameBufferObject *fbo)
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| 169 | {
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| 170 | fbo->Bind();
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| 171 | colorBufferIdx = 3 - colorBufferIdx;
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| 172 | glDrawBuffers(1, mrt + colorBufferIdx);
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| 173 | }
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| 174 |
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| 175 |
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[3026] | 176 | void DeferredRenderer::DrawQuad(ShaderProgram *p)
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| 177 | {
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[3132] | 178 | if (p) p->Bind();
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[3026] | 179 |
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[3089] | 180 | // interpolate the view vector
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[3085] | 181 | Vector3 bl = mCornersView[0];
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| 182 | Vector3 br = mCornersView[1];
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| 183 | Vector3 tl = mCornersView[2];
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| 184 | Vector3 tr = mCornersView[3];
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| 185 |
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[3026] | 186 | // note: slightly larger texture could hide ambient occlusion error on border but costs resolution
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| 187 | glBegin(GL_QUADS);
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| 188 |
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[3093] | 189 | glTexCoord2f(0, 0); glMultiTexCoord3fARB(GL_TEXTURE1_ARB, bl.x, bl.y, bl.z); glVertex2f( .0f, .0f);
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| 190 | glTexCoord2f(1, 0); glMultiTexCoord3fARB(GL_TEXTURE1_ARB, br.x, br.y, br.z); glVertex2f(1.0f, .0f);
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| 191 | glTexCoord2f(1, 1); glMultiTexCoord3fARB(GL_TEXTURE1_ARB, tr.x, tr.y, tr.z); glVertex2f(1.0f, 1.0f);
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| 192 | glTexCoord2f(0, 1); glMultiTexCoord3fARB(GL_TEXTURE1_ARB, tl.x, tl.y, tl.z); glVertex2f( .0f, 1.0f);
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[3026] | 193 |
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| 194 | glEnd();
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| 195 | }
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| 196 |
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| 197 |
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[2859] | 198 | /** Generate poisson disc distributed sample points on the unit disc
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| 199 | */
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[2887] | 200 | static void GenerateSamples(int sampling)
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[2859] | 201 | {
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[2887] | 202 | switch (sampling)
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| 203 | {
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[2930] | 204 | case DeferredRenderer::SAMPLING_POISSON:
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[2887] | 205 | {
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[3227] | 206 | static PoissonDiscSampleGenerator2D poisson(NUM_SAMPLES, 1.0f);
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[2900] | 207 | poisson.Generate((float *)samples2);
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[2887] | 208 | }
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| 209 | break;
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[2930] | 210 | case DeferredRenderer::SAMPLING_QUADRATIC:
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[2887] | 211 | {
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[3246] | 212 | //static QuadraticDiscSampleGenerator2D g(NUM_PRECOMPUTED_SAMPLES, 1.0f);
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| 213 | static QuadraticDiscSampleGenerator2D g(NUM_SAMPLES, 1.0f);
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[2930] | 214 | g.Generate((float *)samples2);
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[2887] | 215 | }
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| 216 | break;
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[2930] | 217 | default: // SAMPLING_DEFAULT
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[3026] | 218 | {
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[3227] | 219 | static RandomSampleGenerator2D g(NUM_SAMPLES, 1.0f);
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[3026] | 220 | g.Generate((float *)samples2);
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| 221 | }
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[2903] | 222 | }
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[2859] | 223 | }
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| 224 |
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| 225 |
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[2879] | 226 | static void CreateNoiseTex2D(int w, int h)
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| 227 | {
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| 228 | //GLubyte *randomNormals = new GLubyte[mWidth * mHeight * 3];
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[3227] | 229 | Vector3 *randomNormals = new Vector3[w * h];
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[2879] | 230 |
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[3227] | 231 | for (int i = 0; i < w * h; ++ i)
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[2879] | 232 | {
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[2903] | 233 | // create random samples on a circle
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[3227] | 234 | const float r = RandomValue(0, 1);
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[2903] | 235 |
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[3227] | 236 | const float theta = 2.0f * acos(sqrt(1.0f - r));
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| 237 | //randomNormals[i] = Vector3(cos(theta), sin(theta), 0);
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| 238 | randomNormals[i] = Vector3(RandomValue(-M_PI, M_PI), 0, 0);
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| 239 | //Normalize(randomNormals[i]);
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[2879] | 240 | }
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| 241 |
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[3227] | 242 |
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[2879] | 243 | glEnable(GL_TEXTURE_2D);
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[3129] | 244 | glGenTextures(1, &noiseTex2D);
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| 245 | glBindTexture(GL_TEXTURE_2D, noiseTex2D);
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[2879] | 246 |
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[3227] | 247 | //glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
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| 248 | //glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
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| 249 |
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| 250 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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| 251 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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[2879] | 252 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
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| 253 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
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| 254 |
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[3227] | 255 | glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA16F_ARB, w, h, 0, GL_RGB, GL_FLOAT, (float *)randomNormals);
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[2879] | 256 |
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| 257 | glBindTexture(GL_TEXTURE_2D, 0);
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| 258 | glDisable(GL_TEXTURE_2D);
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| 259 |
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| 260 | delete [] randomNormals;
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| 261 |
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| 262 | cout << "created noise texture" << endl;
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| 263 |
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| 264 | PrintGLerror("noisetexture");
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| 265 | }
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| 266 |
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| 267 |
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[3213] | 268 | static void PrepareLenseFlare()
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| 269 | {
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[3214] | 270 | string textures[] = {"flare4.tga", "lens2.jpg", "lens3.jpg", "lens4.jpg", "lens1.jpg"};
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[3213] | 271 |
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[3214] | 272 | for (int i = 0; i < 5; ++ i)
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[3213] | 273 | {
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| 274 | sHaloTex[i] = new Texture(model_path + textures[i]);
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| 275 |
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[3214] | 276 | sHaloTex[i]->SetBoundaryModeS(Texture::BORDER);
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| 277 | sHaloTex[i]->SetBoundaryModeT(Texture::BORDER);
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[3213] | 278 |
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| 279 | sHaloTex[i]->Create();
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| 280 | }
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| 281 |
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| 282 | cout << "prepared lense flare textures" << endl;
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| 283 |
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| 284 | PrintGLerror("prepare lense flare");
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| 285 | }
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| 286 |
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| 287 |
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[3216] | 288 | DeferredRenderer::DeferredRenderer(int w, int h,
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| 289 | PerspectiveCamera *cam,
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| 290 | bool ssaoUseFullResolution):
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[2860] | 291 | mWidth(w), mHeight(h),
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| 292 | mCamera(cam),
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[2875] | 293 | mUseTemporalCoherence(true),
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[2895] | 294 | mRegenerateSamples(true),
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[2930] | 295 | mSamplingMethod(SAMPLING_POISSON),
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[2895] | 296 | mShadingMethod(DEFAULT),
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[3189] | 297 | mIllumFboIndex(0),
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[3212] | 298 | mSortSamples(true),
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| 299 | mKernelRadius(1e-8f),
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[3216] | 300 | mSsaoFilterRadius(12.0f),
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[3215] | 301 | mSampleIntensity(0.2f),
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[3219] | 302 | mSunVisiblePixels(0),
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[3220] | 303 | mSavedFrameNumber(-1),
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[3235] | 304 | mSavedFrameSuffix(""),
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[3242] | 305 | mMaxDistance(1e6f),
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| 306 | mTempCohFactor(.0f),
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| 307 | mUseToneMapping(false),
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| 308 | mUseAntiAliasing(false),
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| 309 | mUseDepthOfField(false)
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[2861] | 310 | {
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| 311 | ///////////
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| 312 | //-- the flip-flop fbos
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[2859] | 313 |
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[3216] | 314 | int downSampledWidth, downSampledHeight;
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| 315 |
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| 316 | if (ssaoUseFullResolution)
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| 317 | {
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| 318 | downSampledWidth = w; downSampledHeight = h;
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| 319 | cout << "using full resolution ssao" << endl;
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| 320 | }
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| 321 | else
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| 322 | {
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| 323 | downSampledWidth = w / 2; downSampledHeight = h / 2;
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| 324 | cout << "using half resolution ssao" << endl;
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| 325 | }
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| 326 |
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| 327 | mIllumFbo = new FrameBufferObject(downSampledWidth, downSampledHeight, FrameBufferObject::DEPTH_NONE);
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[3094] | 328 | //mIllumFbo = new FrameBufferObject(w, h, FrameBufferObject::DEPTH_NONE);
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| 329 |
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[3019] | 330 | mFBOs.push_back(mIllumFbo);
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[2891] | 331 |
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[3019] | 332 | for (int i = 0; i < 4; ++ i)
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| 333 | {
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[3088] | 334 | mIllumFbo->AddColorBuffer(ColorBufferObject::RGBA_FLOAT_32, ColorBufferObject::WRAP_CLAMP_TO_EDGE, ColorBufferObject::FILTER_LINEAR);
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[3117] | 335 | FrameBufferObject::InitBuffer(mIllumFbo, i);
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[3019] | 336 | }
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[3002] | 337 |
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[3117] | 338 |
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| 339 | ///////////////
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[3212] | 340 | //-- the downsampled ssao + color bleeding textures:
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| 341 | //-- as GI is mostly low frequency, we can use lower resolution toimprove performance
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[3117] | 342 |
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[3222] | 343 | mDownSampleFbo = new FrameBufferObject(downSampledWidth, downSampledHeight, FrameBufferObject::DEPTH_NONE);
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[3204] | 344 | // the downsampled color + depth buffer
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[3002] | 345 | mDownSampleFbo->AddColorBuffer(ColorBufferObject::RGBA_FLOAT_32, ColorBufferObject::WRAP_CLAMP_TO_EDGE, ColorBufferObject::FILTER_LINEAR);
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[3204] | 346 | // downsample buffer for the normal texture
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[3212] | 347 | mDownSampleFbo->AddColorBuffer(ColorBufferObject::RGB_FLOAT_16, ColorBufferObject::WRAP_CLAMP_TO_EDGE, ColorBufferObject::FILTER_LINEAR);
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[3019] | 348 |
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[3212] | 349 |
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[3199] | 350 | for (int i = 0; i < 2; ++ i)
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| 351 | {
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| 352 | FrameBufferObject::InitBuffer(mDownSampleFbo, i);
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| 353 | }
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[3117] | 354 |
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[3019] | 355 | mFBOs.push_back(mDownSampleFbo);
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[3038] | 356 |
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[3084] | 357 | // create noise texture for ssao
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[3150] | 358 | // for performance reasons we use a smaller texture and repeat it over the screen
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| 359 | CreateNoiseTex2D(mIllumFbo->GetWidth() / 4, mIllumFbo->GetWidth() / 4);
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[3227] | 360 | //CreateNoiseTex2D(mIllumFbo->GetWidth(), mIllumFbo->GetWidth());
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[3192] | 361 |
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[3085] | 362 | mProjViewMatrix = IdentityMatrix();
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| 363 | mOldProjViewMatrix = IdentityMatrix();
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| 364 |
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| 365 | for (int i = 0; i < 4; ++ i)
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| 366 | {
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| 367 | mCornersView[i] = mOldCornersView[i] = Vector3::UNIT_X();
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| 368 | }
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| 369 |
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| 370 | mEyePos = mOldEyePos = Vector3::ZERO();
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| 371 |
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[3213] | 372 | PrepareLenseFlare();
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| 373 |
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[3038] | 374 | InitCg();
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[2861] | 375 | }
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| 376 |
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| 377 |
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[2896] | 378 | DeferredRenderer::~DeferredRenderer()
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[2861] | 379 | {
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[3019] | 380 | CLEAR_CONTAINER(mFBOs);
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[3206] | 381 |
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[3129] | 382 | glDeleteTextures(1, &noiseTex2D);
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| 383 | glDeleteTextures(1, &noiseTex1D);
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[2861] | 384 | }
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| 385 |
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| 386 |
|
---|
[3038] | 387 | void DeferredRenderer::InitCg()
|
---|
[3026] | 388 | {
|
---|
[3057] | 389 | ShaderManager *sm = ShaderManager::GetSingleton();
|
---|
[2873] | 390 |
|
---|
[3216] | 391 | sCgDeferredProgram = sm->CreateFragmentProgram("deferred", "main", "DeferredFrag");
|
---|
| 392 | sCgDeferredShadowProgram = sm->CreateFragmentProgram("deferred", "main_shadow", "DeferredFragShadow");
|
---|
| 393 | sCgSsaoProgram = sm->CreateFragmentProgram("ssao", "main", "SsaoFrag");
|
---|
| 394 | sCgGiProgram = sm->CreateFragmentProgram("globillum", "main", "GiFrag");
|
---|
| 395 | sCgCombineIllumProgram = sm->CreateFragmentProgram("globillum", "combine", "CombineGi");
|
---|
| 396 | sCgCombineSsaoProgram = sm->CreateFragmentProgram("combineSsao", "CombineSsaoHalfRes", "CombineSsao");
|
---|
| 397 | sCgAntiAliasingProgram = sm->CreateFragmentProgram("antialiasing", "main", "AntiAliasing");
|
---|
| 398 | sCgToneProgram = sm->CreateFragmentProgram("tonemap", "ToneMap", "ToneMap");
|
---|
[3137] | 399 | sCgDownSampleProgram = sm->CreateFragmentProgram("deferred", "Output", "Output");
|
---|
| 400 | sCgScaleDepthProgram = sm->CreateFragmentProgram("deferred", "ScaleDepth", "ScaleDepth");
|
---|
[3216] | 401 | sCgLogLumProgram = sm->CreateFragmentProgram("tonemap", "CalcAvgLogLum", "AvgLogLum");
|
---|
[3155] | 402 | sCgPrepareSsaoProgram = sm->CreateFragmentProgram("deferred", "PrepareSsao", "PrepareSsao");
|
---|
[3213] | 403 | sCgLenseFlareProgram = sm->CreateFragmentProgram("lenseFlare", "LenseFlare", "LenseFlare");
|
---|
[3232] | 404 | sCgDOFProgram = sm->CreateFragmentProgram("depthOfField", "DepthOfField", "DepthOfField");
|
---|
[3038] | 405 |
|
---|
[3034] | 406 |
|
---|
[3104] | 407 | ///////////////////
|
---|
| 408 | //-- initialize program parameters
|
---|
[3034] | 409 |
|
---|
[3104] | 410 | string ssaoParams[] =
|
---|
| 411 | {"colors", "normals", "oldTex", "noiseTex", "temporalCoherence",
|
---|
[3111] | 412 | "samples", "bl", "br", "tl", "tr",
|
---|
| 413 | "modelViewProj", "oldModelViewProj", "oldEyePos", "oldbl", "oldbr",
|
---|
[3212] | 414 | "oldtl", "oldtr", "attribsTex", "kernelRadius", "sampleIntensity"};
|
---|
| 415 | sCgSsaoProgram->AddParameters(ssaoParams, 0, 20);
|
---|
[3085] | 416 |
|
---|
[3104] | 417 | string giParams[] =
|
---|
| 418 | {"colors", "normals", "noiseTex", "oldSsaoTex", "oldIllumTex",
|
---|
[3111] | 419 | "temporalCoherence", "samples", "bl", "br", "tl",
|
---|
| 420 | "tr", "oldModelViewProj", "modelViewProj"};
|
---|
[3232] | 421 |
|
---|
[3104] | 422 | sCgGiProgram->AddParameters(giParams, 0, 13);
|
---|
[3034] | 423 |
|
---|
[3104] | 424 | string toneParams[] = {"colors", "imageKey", "whiteLum", "middleGrey"};
|
---|
| 425 | sCgToneProgram->AddParameters(toneParams, 0, 4);
|
---|
[3034] | 426 |
|
---|
| 427 |
|
---|
[3104] | 428 | ////////////////
|
---|
| 429 |
|
---|
| 430 | string deferredShadowParams[] =
|
---|
| 431 | {"colors", "normals", "shadowMap", "noiseTex", "shadowMatrix",
|
---|
| 432 | "sampleWidth", "lightDir", "eyePos", "samples", "weights"};
|
---|
[3035] | 433 |
|
---|
[3104] | 434 | sCgDeferredShadowProgram->AddParameters(deferredShadowParams, 0, 10);
|
---|
| 435 |
|
---|
| 436 | ////////////////
|
---|
[3034] | 437 |
|
---|
[3104] | 438 | string combineIllumParams[] = {"colorsTex", "ssaoTex", "illumTex"};
|
---|
| 439 | sCgCombineIllumProgram->AddParameters(combineIllumParams, 0, 3);
|
---|
[3035] | 440 |
|
---|
[3104] | 441 | ////////////////
|
---|
[3035] | 442 |
|
---|
[3155] | 443 | string combineSsaoParams[] =
|
---|
[3216] | 444 | {"colorsTex", "normalsTex", "ssaoTex", "filterOffs", "filterWeights",
|
---|
| 445 | "ssaoFilterRadius", "modelViewProj", "bl", "br", "tl",
|
---|
| 446 | "tr", "w", "h"};
|
---|
[3232] | 447 |
|
---|
[3216] | 448 | sCgCombineSsaoProgram->AddParameters(combineSsaoParams, 0, 13);
|
---|
[3035] | 449 |
|
---|
[3104] | 450 | //////////////
|
---|
[3036] | 451 |
|
---|
[3104] | 452 | string deferredParams[] = {"colors", "normals", "lightDir"};
|
---|
| 453 | sCgDeferredProgram->AddParameters(deferredParams, 0, 3);
|
---|
| 454 |
|
---|
| 455 | ///////////////////
|
---|
| 456 |
|
---|
[3136] | 457 | string aaParams[] = {"colors", "normals", "offsets"};
|
---|
| 458 | sCgAntiAliasingProgram->AddParameters(aaParams, 0, 3);
|
---|
[3104] | 459 |
|
---|
| 460 | /////////////////////
|
---|
| 461 |
|
---|
[3137] | 462 | string downSampleParams[] = {"colors"};
|
---|
| 463 | sCgDownSampleProgram->AddParameters(downSampleParams, 0, 1);
|
---|
[3104] | 464 |
|
---|
[3137] | 465 | /////////////////////
|
---|
| 466 |
|
---|
| 467 | string scaleDepthParams[] = {"colors"};
|
---|
| 468 | sCgScaleDepthProgram->AddParameters(scaleDepthParams, 0, 1);
|
---|
| 469 |
|
---|
[3104] | 470 | ////////////
|
---|
| 471 |
|
---|
| 472 | sCgLogLumProgram->AddParameter("colors", 0);
|
---|
[3128] | 473 |
|
---|
| 474 | ////////////////
|
---|
| 475 |
|
---|
[3155] | 476 |
|
---|
| 477 | string prepareSsaoParams[] =
|
---|
[3199] | 478 | {"colorsTex", "normalsTex", "diffVals", "oldTex",
|
---|
[3167] | 479 | "oldEyePos", "modelViewProj", "oldModelViewProj",
|
---|
| 480 | "oldbl", "oldbr", "oldtl", "oldtr"};
|
---|
[3104] | 481 |
|
---|
[3199] | 482 | sCgPrepareSsaoProgram->AddParameters(prepareSsaoParams, 0, 11);
|
---|
[3155] | 483 |
|
---|
| 484 |
|
---|
| 485 | ////////////////
|
---|
[3213] | 486 |
|
---|
| 487 | string lenseFlareParams[] =
|
---|
| 488 | {"colorsTex", "flareTex1", "flareTex2", "flareTex3", "flareTex4",
|
---|
[3215] | 489 | "flareTex5", "vectorToLight", "distanceToLight", "sunVisiblePixels"};
|
---|
[3213] | 490 |
|
---|
[3215] | 491 | sCgLenseFlareProgram->AddParameters(lenseFlareParams, 0, 9);
|
---|
[3213] | 492 |
|
---|
[3232] | 493 |
|
---|
| 494 | ////////////////
|
---|
| 495 |
|
---|
[3235] | 496 | string dofParams[] = {"colorsTex", "filterOffs", "sceneRange", "zFocus"};
|
---|
[3213] | 497 |
|
---|
[3235] | 498 | sCgDOFProgram->AddParameters(dofParams, 0, 4);
|
---|
[3232] | 499 |
|
---|
| 500 |
|
---|
[3213] | 501 | ////////////////
|
---|
[3232] | 502 | //-- prepare filter for ssao
|
---|
[3213] | 503 |
|
---|
[3216] | 504 | PrepareSsaoFilter();
|
---|
[3213] | 505 |
|
---|
[3155] | 506 |
|
---|
[3144] | 507 | /////////
|
---|
[3133] | 508 | //-- pcf tabs for shadowing
|
---|
| 509 |
|
---|
[3026] | 510 | float filterWeights[NUM_PCF_TABS];
|
---|
[3227] | 511 | PoissonDiscSampleGenerator2D poisson2(NUM_PCF_TABS, 1.0f);
|
---|
[3103] | 512 | poisson2.Generate((float *)pcfSamples);
|
---|
[2990] | 513 |
|
---|
[3026] | 514 | for (int i = 0; i < NUM_PCF_TABS; ++ i)
|
---|
[2880] | 515 | {
|
---|
[3026] | 516 | filterWeights[i] = GaussianDistribution(pcfSamples[i].x, pcfSamples[i].y, 1.0f);
|
---|
[2880] | 517 | }
|
---|
| 518 |
|
---|
[3035] | 519 | sCgDeferredShadowProgram->SetArray2f(8, (float *)pcfSamples, NUM_PCF_TABS);
|
---|
| 520 | sCgDeferredShadowProgram->SetArray1f(9, (float *)filterWeights, NUM_PCF_TABS);
|
---|
[2880] | 521 |
|
---|
[3232] | 522 |
|
---|
| 523 | /////////
|
---|
| 524 | //-- pcf tabs for depth of field
|
---|
| 525 |
|
---|
| 526 | // todo matt: it is stupid to put num samples and width of kernel into constructor => change this!!!
|
---|
| 527 | PoissonDiscSampleGenerator2D poisson3(NUM_DOF_TABS, 1.0f);
|
---|
[3235] | 528 | poisson3.Generate((float *)dofSamples);
|
---|
[3232] | 529 |
|
---|
[3235] | 530 | for (int i = 0; i < NUM_DOF_TABS; ++ i)
|
---|
| 531 | {
|
---|
| 532 | dofSamples[i].x *= 1.0f / mWidth;
|
---|
| 533 | dofSamples[i].y *= 1.0f / mHeight;
|
---|
| 534 | }
|
---|
| 535 |
|
---|
[3232] | 536 | //float dofWeights[NUM_PCF_TABS];
|
---|
| 537 | //sCgDOFProgram->SetArray1f(2, (float *)dofWeights, NUM_DOF_TABS);
|
---|
| 538 |
|
---|
[2859] | 539 | PrintGLerror("init");
|
---|
| 540 | }
|
---|
| 541 |
|
---|
| 542 |
|
---|
[2896] | 543 | void DeferredRenderer::Render(FrameBufferObject *fbo,
|
---|
[2952] | 544 | DirectionalLight *light,
|
---|
[2991] | 545 | ShadowMap *shadowMap
|
---|
| 546 | )
|
---|
[2859] | 547 | {
|
---|
[3085] | 548 | InitFrame();
|
---|
| 549 |
|
---|
[2944] | 550 | if (shadowMap)
|
---|
[2952] | 551 | FirstPassShadow(fbo, light, shadowMap);
|
---|
[2895] | 552 | else
|
---|
[2952] | 553 | FirstPass(fbo, light);
|
---|
[2944] | 554 |
|
---|
[3103] | 555 | if (mShadingMethod != 0)
|
---|
[2880] | 556 | {
|
---|
[3214] | 557 | PrepareSsao(fbo); // downsample fbo buffers
|
---|
[3103] | 558 | }
|
---|
[3006] | 559 |
|
---|
[3213] | 560 | // q: use antialiasing before or after ssao?
|
---|
[3193] | 561 | //if (useAntiAliasing) AntiAliasing(fbo, light);
|
---|
[3132] | 562 |
|
---|
[3103] | 563 | switch (mShadingMethod)
|
---|
| 564 | {
|
---|
| 565 | case SSAO:
|
---|
[3242] | 566 | ComputeSsao(fbo, mTempCohFactor);
|
---|
[2944] | 567 | CombineSsao(fbo);
|
---|
| 568 | break;
|
---|
| 569 | case GI:
|
---|
[3242] | 570 | ComputeGlobIllum(fbo, mTempCohFactor);
|
---|
[2944] | 571 | CombineIllum(fbo);
|
---|
| 572 | break;
|
---|
[3214] | 573 | default:
|
---|
[2944] | 574 | // do nothing: standard deferred shading
|
---|
| 575 | break;
|
---|
| 576 | }
|
---|
[2884] | 577 |
|
---|
[3242] | 578 | /// depth of field
|
---|
| 579 | if (mUseDepthOfField)
|
---|
| 580 | {
|
---|
| 581 | DepthOfField(fbo);
|
---|
| 582 | }
|
---|
[3235] | 583 |
|
---|
[3242] | 584 | if (mUseToneMapping)
|
---|
[2991] | 585 | {
|
---|
| 586 | float imageKey, whiteLum, middleGrey;
|
---|
| 587 |
|
---|
| 588 | ComputeToneParameters(fbo, light, imageKey, whiteLum, middleGrey);
|
---|
[3007] | 589 | ToneMap(fbo, imageKey, whiteLum, middleGrey);
|
---|
[2991] | 590 | }
|
---|
| 591 |
|
---|
[3215] | 592 | /// compute lense flare
|
---|
| 593 | LenseFlare(fbo, light);
|
---|
[3213] | 594 |
|
---|
[3219] | 595 | const bool saveFrame = (mSavedFrameNumber != -1);
|
---|
| 596 | const bool displayAfterAA = !saveFrame;
|
---|
| 597 |
|
---|
[3175] | 598 | // multisampling is difficult / costly with deferred shading
|
---|
| 599 | // at least do some edge blurring
|
---|
[3242] | 600 | if (mUseAntiAliasing) AntiAliasing(fbo, light, displayAfterAA);
|
---|
[3219] | 601 |
|
---|
| 602 | /// store the current frame
|
---|
| 603 | if (saveFrame) SaveFrame(fbo);
|
---|
[3135] | 604 |
|
---|
[3219] | 605 | // if it hasn't been done yet => just output the latest buffer
|
---|
[3242] | 606 | if (!mUseAntiAliasing || !displayAfterAA)
|
---|
[3219] | 607 | Output(fbo);
|
---|
| 608 |
|
---|
[2867] | 609 | glEnable(GL_LIGHTING);
|
---|
| 610 | glDisable(GL_TEXTURE_2D);
|
---|
| 611 |
|
---|
| 612 | glMatrixMode(GL_PROJECTION);
|
---|
| 613 | glPopMatrix();
|
---|
| 614 |
|
---|
| 615 | glMatrixMode(GL_MODELVIEW);
|
---|
| 616 | glPopMatrix();
|
---|
| 617 |
|
---|
[3089] | 618 | // viewport
|
---|
[2867] | 619 | glPopAttrib();
|
---|
| 620 |
|
---|
[3007] | 621 | FrameBufferObject::Release();
|
---|
[3057] | 622 | ShaderManager::GetSingleton()->DisableFragmentProfile();
|
---|
[2859] | 623 | }
|
---|
| 624 |
|
---|
| 625 |
|
---|
[3216] | 626 | void DeferredRenderer::PrepareSsaoFilter()
|
---|
| 627 | {
|
---|
| 628 | const float filterWidth = 1.0f;
|
---|
[3167] | 629 |
|
---|
[3227] | 630 | PoissonDiscSampleGenerator2D poisson(NUM_SSAO_FILTER_SAMPLES, 1.0f);
|
---|
[3216] | 631 | poisson.Generate((float *)ssaoFilterOffsets);
|
---|
| 632 |
|
---|
| 633 | const float xoffs = (float)filterWidth / mWidth;
|
---|
| 634 | const float yoffs = (float)filterWidth / mHeight;
|
---|
| 635 |
|
---|
| 636 | for (int i = 0; i < NUM_SSAO_FILTER_SAMPLES; ++ i)
|
---|
| 637 | {
|
---|
| 638 | float x = ssaoFilterOffsets[2 * i + 0];
|
---|
| 639 | float y = ssaoFilterOffsets[2 * i + 1];
|
---|
| 640 |
|
---|
| 641 | ssaoFilterWeights[i] = GaussianDistribution(x, y, 1.0f);
|
---|
| 642 | //ssaoFilterWeights[i] = 1.0f;
|
---|
| 643 |
|
---|
| 644 | ssaoFilterOffsets[2 * i + 0] *= xoffs;
|
---|
| 645 | ssaoFilterOffsets[2 * i + 1] *= yoffs;
|
---|
| 646 | }
|
---|
| 647 | }
|
---|
| 648 |
|
---|
| 649 |
|
---|
[3167] | 650 | static inline float SqrMag(const Sample2 &s)
|
---|
| 651 | {
|
---|
| 652 | return (s.x * s.x + s.y * s.y);
|
---|
| 653 | }
|
---|
| 654 |
|
---|
| 655 |
|
---|
| 656 | static inline float SqrDist(const Sample2 &a, const Sample2 &b)
|
---|
| 657 | {
|
---|
| 658 | float x = a.x - b.x;
|
---|
| 659 | float y = a.y - b.y;
|
---|
| 660 |
|
---|
| 661 | return x * x + y * y;
|
---|
| 662 | }
|
---|
| 663 |
|
---|
| 664 |
|
---|
| 665 | static inline bool lt(const Sample2 &a, const Sample2 &b)
|
---|
| 666 | {
|
---|
| 667 | return SqrMag(a) < SqrMag(b);
|
---|
| 668 | }
|
---|
| 669 |
|
---|
| 670 |
|
---|
| 671 | void DeferredRenderer::SortSamples()
|
---|
| 672 | {
|
---|
| 673 | static Sample2 tempSamples[NUM_SAMPLES];
|
---|
| 674 | static bool checked[NUM_SAMPLES];
|
---|
| 675 |
|
---|
| 676 | for (int i = 0; i < NUM_SAMPLES; ++ i)
|
---|
| 677 | checked[i] = false;
|
---|
| 678 |
|
---|
| 679 | Sample2 currentSample;
|
---|
| 680 | currentSample.x = 0; currentSample.y = 0;
|
---|
| 681 | int ns = 0; // the next sample index
|
---|
| 682 |
|
---|
| 683 | for (int i = 0; i < NUM_SAMPLES; ++ i)
|
---|
| 684 | {
|
---|
| 685 | float minLen = 1e20f;
|
---|
| 686 |
|
---|
| 687 | for (int j = 0; j < NUM_SAMPLES; ++ j)
|
---|
| 688 | {
|
---|
| 689 | if (checked[j]) continue;
|
---|
| 690 |
|
---|
| 691 | Sample2 s = samples2[j];
|
---|
| 692 | const float len = SqrDist(s, currentSample);
|
---|
| 693 |
|
---|
| 694 | if (len < minLen)
|
---|
| 695 | {
|
---|
| 696 | minLen = len;
|
---|
| 697 | ns = j;
|
---|
| 698 | }
|
---|
| 699 | }
|
---|
| 700 |
|
---|
| 701 | tempSamples[i] = samples2[ns];
|
---|
| 702 | currentSample = samples2[ns];
|
---|
| 703 | checked[ns] = true;
|
---|
| 704 | }
|
---|
| 705 |
|
---|
| 706 | for (int i = 0; i < NUM_SAMPLES; ++ i)
|
---|
| 707 | samples2[i] = tempSamples[i];
|
---|
| 708 | }
|
---|
| 709 |
|
---|
| 710 |
|
---|
[3199] | 711 | void DeferredRenderer::ComputeSsao(FrameBufferObject *fbo, float tempCohFactor)
|
---|
[2859] | 712 | {
|
---|
[3117] | 713 | GLuint colorsTex, normalsTex, attribsTex;
|
---|
[3015] | 714 |
|
---|
[3133] | 715 | if (0)
|
---|
[3199] | 716 | {
|
---|
[3117] | 717 | colorsTex = fbo->GetColorBuffer(colorBufferIdx)->GetTexture();
|
---|
[3199] | 718 | normalsTex = fbo->GetColorBuffer(1)->GetTexture();
|
---|
| 719 | }
|
---|
[3117] | 720 | else
|
---|
[3199] | 721 | {
|
---|
| 722 | normalsTex = mDownSampleFbo->GetColorBuffer(1)->GetTexture();
|
---|
[3117] | 723 | colorsTex = mDownSampleFbo->GetColorBuffer(0)->GetTexture();
|
---|
[3199] | 724 | }
|
---|
| 725 |
|
---|
[3198] | 726 | attribsTex = fbo->GetColorBuffer(2)->GetTexture();
|
---|
[3117] | 727 |
|
---|
[3087] | 728 | // flip flop between illumination buffers
|
---|
[3019] | 729 | GLuint oldTex = mIllumFbo->GetColorBuffer(2 - mIllumFboIndex)->GetTexture();
|
---|
[2993] | 730 |
|
---|
[3006] | 731 | glPushAttrib(GL_VIEWPORT_BIT);
|
---|
[3019] | 732 | glViewport(0, 0, mIllumFbo->GetWidth(), mIllumFbo->GetHeight());
|
---|
[3006] | 733 |
|
---|
[2861] | 734 | // read the second buffer, write to the first buffer
|
---|
[3019] | 735 | mIllumFbo->Bind();
|
---|
| 736 | glDrawBuffers(1, mrt + mIllumFboIndex);
|
---|
[2868] | 737 |
|
---|
[3095] | 738 | int i = 0;
|
---|
[3034] | 739 |
|
---|
[3095] | 740 | sCgSsaoProgram->SetTexture(i ++, colorsTex);
|
---|
| 741 | sCgSsaoProgram->SetTexture(i ++, normalsTex);
|
---|
| 742 | sCgSsaoProgram->SetTexture(i ++, oldTex);
|
---|
[3129] | 743 | sCgSsaoProgram->SetTexture(i ++, noiseTex2D);
|
---|
[3095] | 744 |
|
---|
| 745 | sCgSsaoProgram->SetValue1f(i ++, (mUseTemporalCoherence && !mRegenerateSamples) ? tempCohFactor : 0);
|
---|
[3035] | 746 |
|
---|
[3231] | 747 | static int currentPos = 0;
|
---|
| 748 |
|
---|
[3129] | 749 | if (mUseTemporalCoherence || mRegenerateSamples)
|
---|
[2875] | 750 | {
|
---|
[2895] | 751 | mRegenerateSamples = false;
|
---|
[2859] | 752 |
|
---|
[2875] | 753 | // q: should we generate new samples or only rotate the old ones?
|
---|
| 754 | // in the first case, the sample patterns look nicer, but the kernel
|
---|
| 755 | // needs longer to converge
|
---|
[3246] | 756 | //if (currentPos + NUM_SAMPLES >= NUM_PRECOMPUTED_SAMPLES) {
|
---|
[3231] | 757 | currentPos = 0;
|
---|
| 758 | GenerateSamples(mSamplingMethod);
|
---|
[3246] | 759 | //}
|
---|
[3167] | 760 |
|
---|
[3192] | 761 | //if (mSortSamples) { SortSamples(); }
|
---|
[3231] | 762 | sCgSsaoProgram->SetArray2f(i, (float *)samples2 + currentPos, NUM_SAMPLES);
|
---|
| 763 |
|
---|
| 764 | currentPos += NUM_SAMPLES;
|
---|
[2875] | 765 | }
|
---|
[3085] | 766 |
|
---|
[3095] | 767 | ++ i;
|
---|
[2859] | 768 |
|
---|
[3095] | 769 | for (int j = 0; j < 4; ++ j, ++ i)
|
---|
| 770 | sCgSsaoProgram->SetValue3f(i, mCornersView[j].x, mCornersView[j].y, mCornersView[j].z);
|
---|
[2987] | 771 |
|
---|
[3095] | 772 | sCgSsaoProgram->SetMatrix(i ++, mProjViewMatrix);
|
---|
| 773 | sCgSsaoProgram->SetMatrix(i ++, mOldProjViewMatrix);
|
---|
[3062] | 774 |
|
---|
[3105] | 775 | Vector3 de;
|
---|
| 776 | de.x = mOldEyePos.x - mEyePos.x;
|
---|
| 777 | de.y = mOldEyePos.y - mEyePos.y;
|
---|
| 778 | de.z = mOldEyePos.z - mEyePos.z;
|
---|
[3035] | 779 |
|
---|
[3095] | 780 | sCgSsaoProgram->SetValue3f(i ++, de.x, de.y, de.z);
|
---|
[3093] | 781 |
|
---|
[3095] | 782 | for (int j = 0; j < 4; ++ j, ++ i)
|
---|
[3212] | 783 | {
|
---|
[3095] | 784 | sCgSsaoProgram->SetValue3f(i, mOldCornersView[j].x, mOldCornersView[j].y, mOldCornersView[j].z);
|
---|
[3212] | 785 | }
|
---|
[3085] | 786 |
|
---|
[3110] | 787 | sCgSsaoProgram->SetTexture(i ++, attribsTex);
|
---|
[3212] | 788 | sCgSsaoProgram->SetValue1f(i ++, mKernelRadius);
|
---|
[3227] | 789 | sCgSsaoProgram->SetValue1f(i ++, mSampleIntensity * mKernelRadius);
|
---|
[3110] | 790 |
|
---|
[3129] | 791 |
|
---|
[3026] | 792 | DrawQuad(sCgSsaoProgram);
|
---|
[2987] | 793 |
|
---|
[3006] | 794 | glPopAttrib();
|
---|
[2859] | 795 |
|
---|
| 796 | PrintGLerror("ssao first pass");
|
---|
| 797 | }
|
---|
| 798 |
|
---|
| 799 |
|
---|
[2865] | 800 | static void SetVertex(float x, float y, float x_offs, float y_offs)
|
---|
| 801 | {
|
---|
| 802 | glMultiTexCoord2fARB(GL_TEXTURE0_ARB, x, y); // center
|
---|
| 803 | glMultiTexCoord2fARB(GL_TEXTURE1_ARB, x - x_offs, y + y_offs); // left top
|
---|
| 804 | glMultiTexCoord2fARB(GL_TEXTURE2_ARB, x + x_offs, y - y_offs); // right bottom
|
---|
| 805 | glMultiTexCoord2fARB(GL_TEXTURE3_ARB, x + x_offs, y + y_offs); // right top
|
---|
| 806 | glMultiTexCoord2fARB(GL_TEXTURE4_ARB, x - x_offs, y - y_offs); // left bottom
|
---|
| 807 |
|
---|
| 808 | glMultiTexCoord4fARB(GL_TEXTURE5_ARB, x - x_offs, y, x + x_offs, y); // left right
|
---|
| 809 | glMultiTexCoord4fARB(GL_TEXTURE6_ARB, x, y + y_offs, x, y - y_offs); // top bottom
|
---|
| 810 |
|
---|
[3089] | 811 | //glVertex3f(x - 0.5f, y - 0.5f, -0.5f);
|
---|
| 812 | glVertex2f(x, y);
|
---|
[2865] | 813 | }
|
---|
| 814 |
|
---|
| 815 |
|
---|
[3219] | 816 | void DeferredRenderer::AntiAliasing(FrameBufferObject *fbo,
|
---|
| 817 | DirectionalLight *light,
|
---|
| 818 | bool displayFrame)
|
---|
[2865] | 819 | {
|
---|
[2968] | 820 | ColorBufferObject *colorBuffer = fbo->GetColorBuffer(colorBufferIdx);
|
---|
| 821 | GLuint colorsTex = colorBuffer->GetTexture();
|
---|
[3136] | 822 | GLuint normalsTex = fbo->GetColorBuffer(1)->GetTexture();
|
---|
[3007] | 823 |
|
---|
[3132] | 824 | // read the second buffer, write to the first buffer
|
---|
[3219] | 825 | if (!displayFrame)
|
---|
| 826 | FlipFbos(fbo);
|
---|
| 827 | else
|
---|
| 828 | // end of the pipeline => just draw image to screen
|
---|
| 829 | FrameBufferObject::Release();
|
---|
[3132] | 830 |
|
---|
[3136] | 831 | // the neighbouring texels
|
---|
| 832 | float xOffs = 1.0f / fbo->GetWidth();
|
---|
| 833 | float yOffs = 1.0f / fbo->GetHeight();
|
---|
| 834 |
|
---|
[3034] | 835 | sCgAntiAliasingProgram->SetTexture(0, colorsTex);
|
---|
| 836 | sCgAntiAliasingProgram->SetTexture(1, normalsTex);
|
---|
[2865] | 837 |
|
---|
[3136] | 838 | float offsets[16];
|
---|
| 839 | int i = 0;
|
---|
[2868] | 840 |
|
---|
[3136] | 841 | offsets[i] = -xOffs; offsets[i + 1] = yOffs; i += 2; // left top
|
---|
| 842 | offsets[i] = xOffs; offsets[i + 1] = -yOffs; i += 2; // right bottom
|
---|
| 843 | offsets[i] = xOffs; offsets[i + 1] = yOffs; i += 2; // right top
|
---|
| 844 | offsets[i] = -xOffs; offsets[i + 1] = -yOffs; i += 2; // left bottom
|
---|
| 845 | offsets[i] = -xOffs; offsets[i + 1] = .0f; i += 2; // left
|
---|
| 846 | offsets[i] = xOffs; offsets[i + 1] = .0f; i += 2; // right
|
---|
| 847 | offsets[i] = .0f; offsets[i + 1] = yOffs; i += 2; // top
|
---|
| 848 | offsets[i] = .0f; offsets[i + 1] = -yOffs; i += 2; // bottom
|
---|
[2865] | 849 |
|
---|
[3136] | 850 | sCgAntiAliasingProgram->SetArray2f(2, offsets, 8);
|
---|
[2865] | 851 |
|
---|
[3136] | 852 | DrawQuad(sCgAntiAliasingProgram);
|
---|
[2865] | 853 |
|
---|
[2867] | 854 | PrintGLerror("antialiasing");
|
---|
[2865] | 855 | }
|
---|
| 856 |
|
---|
| 857 |
|
---|
[2952] | 858 | void DeferredRenderer::FirstPass(FrameBufferObject *fbo, DirectionalLight *light)
|
---|
[2868] | 859 | {
|
---|
[2973] | 860 | GLuint colorsTex = fbo->GetColorBuffer(colorBufferIdx)->GetTexture();
|
---|
[3009] | 861 | GLuint normalsTex = fbo->GetColorBuffer(1)->GetTexture();
|
---|
[2868] | 862 |
|
---|
[3132] | 863 | FlipFbos(fbo);
|
---|
[2868] | 864 |
|
---|
[3026] | 865 | const Vector3 lightDir = -light->GetDirection();
|
---|
[2868] | 866 |
|
---|
[3034] | 867 | sCgDeferredProgram->SetTexture(0, colorsTex);
|
---|
| 868 | sCgDeferredProgram->SetTexture(1, normalsTex);
|
---|
| 869 | sCgDeferredProgram->SetValue3f(2, lightDir.x, lightDir.y, lightDir.z);
|
---|
[2868] | 870 |
|
---|
[3026] | 871 | DrawQuad(sCgDeferredProgram);
|
---|
[2952] | 872 |
|
---|
[2868] | 873 | PrintGLerror("deferred shading");
|
---|
| 874 | }
|
---|
| 875 |
|
---|
[2869] | 876 |
|
---|
[2896] | 877 | void DeferredRenderer::ComputeGlobIllum(FrameBufferObject *fbo,
|
---|
[3085] | 878 | float tempCohFactor)
|
---|
[2869] | 879 | {
|
---|
[3016] | 880 | #if 0
|
---|
| 881 | GLuint colorsTex = fbo->GetColorBuffer(colorBufferIdx)->GetTexture();
|
---|
| 882 | GLuint normalsTex = fbo->GetColorBuffer(1)->GetTexture();
|
---|
| 883 | #else
|
---|
[3003] | 884 | GLuint colorsTex = mDownSampleFbo->GetColorBuffer(0)->GetTexture();
|
---|
[3009] | 885 | GLuint normalsTex = mDownSampleFbo->GetColorBuffer(1)->GetTexture();
|
---|
[3016] | 886 | #endif
|
---|
[2869] | 887 |
|
---|
[3006] | 888 | glPushAttrib(GL_VIEWPORT_BIT);
|
---|
[3019] | 889 | glViewport(0, 0, mIllumFbo->GetWidth(), mIllumFbo->GetHeight());
|
---|
[2869] | 890 |
|
---|
[2873] | 891 | // read the second buffer, write to the first buffer
|
---|
[3019] | 892 | mIllumFbo->Bind();
|
---|
[2873] | 893 |
|
---|
[3019] | 894 | glDrawBuffers(2, mrt + mIllumFboIndex);
|
---|
[2873] | 895 |
|
---|
[3019] | 896 | GLuint oldSsaoTex = mIllumFbo->GetColorBuffer(2 - mIllumFboIndex)->GetTexture();
|
---|
| 897 | GLuint oldIllumTex = mIllumFbo->GetColorBuffer(2 - mIllumFboIndex + 1)->GetTexture();
|
---|
[2869] | 898 |
|
---|
[3160] | 899 | int i = 0;
|
---|
[2869] | 900 |
|
---|
[3160] | 901 | sCgGiProgram->SetTexture(i ++, colorsTex);
|
---|
| 902 | sCgGiProgram->SetTexture(i ++, normalsTex);
|
---|
| 903 | sCgGiProgram->SetTexture(i ++, noiseTex2D);
|
---|
| 904 | sCgGiProgram->SetTexture(i ++, oldSsaoTex);
|
---|
| 905 | sCgGiProgram->SetTexture(i ++, oldIllumTex);
|
---|
| 906 |
|
---|
| 907 | sCgGiProgram->SetValue1f(i ++,
|
---|
[3026] | 908 | (mUseTemporalCoherence && !mRegenerateSamples) ? tempCohFactor : 0);
|
---|
[2869] | 909 |
|
---|
[2895] | 910 | if (mUseTemporalCoherence || mRegenerateSamples)
|
---|
[2875] | 911 | {
|
---|
[2895] | 912 | mRegenerateSamples = false;
|
---|
[2873] | 913 |
|
---|
[2875] | 914 | // q: should we generate new samples or only rotate the old ones?
|
---|
| 915 | // in the first case, the sample patterns look nicer, but the kernel
|
---|
| 916 | // needs longer to converge
|
---|
[2895] | 917 | GenerateSamples(mSamplingMethod);
|
---|
[2903] | 918 |
|
---|
[3160] | 919 | sCgGiProgram->SetArray2f(i ++, (float *)samples2, NUM_SAMPLES);
|
---|
[2875] | 920 | }
|
---|
| 921 |
|
---|
[3085] | 922 | Vector3 bl = mCornersView[0];
|
---|
| 923 | Vector3 br = mCornersView[1];
|
---|
| 924 | Vector3 tl = mCornersView[2];
|
---|
| 925 | Vector3 tr = mCornersView[3];
|
---|
[2895] | 926 |
|
---|
[3160] | 927 | sCgGiProgram->SetValue3f(i ++, bl.x, bl.y, bl.z);
|
---|
| 928 | sCgGiProgram->SetValue3f(i ++, br.x, br.y, br.z);
|
---|
| 929 | sCgGiProgram->SetValue3f(i ++, tl.x, tl.y, tl.z);
|
---|
| 930 | sCgGiProgram->SetValue3f(i ++, tr.x, tr.y, tr.z);
|
---|
[2873] | 931 |
|
---|
[3160] | 932 | sCgGiProgram->SetMatrix(i ++, mOldProjViewMatrix);
|
---|
| 933 | sCgGiProgram->SetMatrix(i ++, mProjViewMatrix);
|
---|
[3035] | 934 |
|
---|
| 935 |
|
---|
[3026] | 936 | DrawQuad(sCgGiProgram);
|
---|
[2990] | 937 |
|
---|
[3006] | 938 | glPopAttrib();
|
---|
| 939 |
|
---|
[2873] | 940 | PrintGLerror("globillum first pass");
|
---|
[2869] | 941 | }
|
---|
| 942 |
|
---|
| 943 |
|
---|
[2896] | 944 | void DeferredRenderer::CombineIllum(FrameBufferObject *fbo)
|
---|
[2880] | 945 | {
|
---|
[2973] | 946 | GLuint colorsTex = fbo->GetColorBuffer(colorBufferIdx)->GetTexture();
|
---|
[2884] | 947 |
|
---|
[3019] | 948 | GLuint ssaoTex = mIllumFbo->GetColorBuffer(mIllumFboIndex)->GetTexture();
|
---|
| 949 | GLuint illumTex = mIllumFbo->GetColorBuffer(mIllumFboIndex + 1)->GetTexture();
|
---|
[2880] | 950 |
|
---|
[3132] | 951 | FlipFbos(fbo);
|
---|
[2891] | 952 |
|
---|
[3036] | 953 | sCgCombineIllumProgram->SetTexture(0, colorsTex);
|
---|
| 954 | sCgCombineIllumProgram->SetTexture(1, ssaoTex);
|
---|
| 955 | sCgCombineIllumProgram->SetTexture(2, illumTex);
|
---|
[2880] | 956 |
|
---|
[3026] | 957 | DrawQuad(sCgCombineIllumProgram);
|
---|
[2880] | 958 |
|
---|
| 959 | PrintGLerror("combine");
|
---|
| 960 | }
|
---|
| 961 |
|
---|
| 962 |
|
---|
[2896] | 963 | void DeferredRenderer::CombineSsao(FrameBufferObject *fbo)
|
---|
[2880] | 964 | {
|
---|
[2973] | 965 | GLuint colorsTex = fbo->GetColorBuffer(colorBufferIdx)->GetTexture();
|
---|
[3103] | 966 | GLuint normalsTex = fbo->GetColorBuffer(1)->GetTexture();
|
---|
[3144] | 967 | GLuint ssaoTex = mIllumFbo->GetColorBuffer(mIllumFboIndex)->GetTexture();
|
---|
[3132] | 968 |
|
---|
| 969 | FlipFbos(fbo);
|
---|
[2880] | 970 |
|
---|
[3104] | 971 | int i = 0;
|
---|
[3148] | 972 |
|
---|
[3104] | 973 | sCgCombineSsaoProgram->SetTexture(i ++, colorsTex);
|
---|
[3120] | 974 | sCgCombineSsaoProgram->SetTexture(i ++, normalsTex);
|
---|
[3104] | 975 | sCgCombineSsaoProgram->SetTexture(i ++, ssaoTex);
|
---|
[3017] | 976 |
|
---|
[3167] | 977 | sCgCombineSsaoProgram->SetArray2f(i ++, (float *)ssaoFilterOffsets, NUM_SSAO_FILTER_SAMPLES);
|
---|
| 978 | sCgCombineSsaoProgram->SetArray1f(i ++, (float *)ssaoFilterWeights, NUM_SSAO_FILTER_SAMPLES);
|
---|
[3216] | 979 | sCgCombineSsaoProgram->SetValue1f(i ++, mSsaoFilterRadius);
|
---|
| 980 |
|
---|
[3160] | 981 | sCgCombineSsaoProgram->SetMatrix(i++, mProjViewMatrix);
|
---|
[3134] | 982 |
|
---|
[3163] | 983 | for (int j = 0; j < 4; ++ j, ++ i)
|
---|
| 984 | sCgCombineSsaoProgram->SetValue3f(i, mCornersView[j].x, mCornersView[j].y, mCornersView[j].z);
|
---|
[3134] | 985 |
|
---|
[3205] | 986 | sCgCombineSsaoProgram->SetValue1f(i ++, mIllumFbo->GetColorBuffer(mIllumFboIndex)->GetWidth());
|
---|
| 987 | sCgCombineSsaoProgram->SetValue1f(i ++, mIllumFbo->GetColorBuffer(mIllumFboIndex)->GetHeight());
|
---|
| 988 |
|
---|
[3026] | 989 | DrawQuad(sCgCombineSsaoProgram);
|
---|
[2974] | 990 |
|
---|
[2880] | 991 | PrintGLerror("combine ssao");
|
---|
| 992 | }
|
---|
| 993 |
|
---|
| 994 |
|
---|
[2952] | 995 | void DeferredRenderer::FirstPassShadow(FrameBufferObject *fbo,
|
---|
| 996 | DirectionalLight *light,
|
---|
| 997 | ShadowMap *shadowMap)
|
---|
[2895] | 998 | {
|
---|
[2973] | 999 | GLuint colorsTex = fbo->GetColorBuffer(colorBufferIdx)->GetTexture();
|
---|
[3009] | 1000 | GLuint normalsTex = fbo->GetColorBuffer(1)->GetTexture();
|
---|
[2973] | 1001 |
|
---|
[2928] | 1002 | GLuint shadowTex = shadowMap->GetDepthTexture();
|
---|
[2895] | 1003 |
|
---|
| 1004 | Matrix4x4 shadowMatrix;
|
---|
| 1005 | shadowMap->GetTextureMatrix(shadowMatrix);
|
---|
| 1006 |
|
---|
| 1007 |
|
---|
[3132] | 1008 | FlipFbos(fbo);
|
---|
| 1009 |
|
---|
[3035] | 1010 | sCgDeferredShadowProgram->SetTexture(0, colorsTex);
|
---|
| 1011 | sCgDeferredShadowProgram->SetTexture(1, normalsTex);
|
---|
| 1012 | sCgDeferredShadowProgram->SetTexture(2, shadowTex);
|
---|
[3129] | 1013 | sCgDeferredShadowProgram->SetTexture(3, noiseTex2D);
|
---|
[3035] | 1014 | sCgDeferredShadowProgram->SetMatrix(4, shadowMatrix);
|
---|
| 1015 | sCgDeferredShadowProgram->SetValue1f(5, 2.0f / shadowMap->GetSize());
|
---|
[3027] | 1016 |
|
---|
[3026] | 1017 | const Vector3 lightDir = -light->GetDirection();
|
---|
[3035] | 1018 | sCgDeferredShadowProgram->SetValue3f(6, lightDir.x, lightDir.y, lightDir.z);
|
---|
[3085] | 1019 | sCgDeferredShadowProgram->SetValue3f(7, mEyePos.x, mEyePos.y, mEyePos.z);
|
---|
[2952] | 1020 |
|
---|
[3026] | 1021 | DrawQuad(sCgDeferredShadowProgram);
|
---|
[2895] | 1022 |
|
---|
| 1023 | PrintGLerror("deferred shading + shadows");
|
---|
| 1024 | }
|
---|
| 1025 |
|
---|
| 1026 |
|
---|
[2973] | 1027 | void DeferredRenderer::ComputeToneParameters(FrameBufferObject *fbo,
|
---|
| 1028 | DirectionalLight *light,
|
---|
| 1029 | float &imageKey,
|
---|
| 1030 | float &whiteLum,
|
---|
| 1031 | float &middleGrey)
|
---|
[2972] | 1032 | {
|
---|
[2975] | 1033 | // hack: estimate value where sky burns out
|
---|
[3010] | 1034 | whiteLum = log(WHITE_LUMINANCE);
|
---|
[2973] | 1035 |
|
---|
[2975] | 1036 | ////////////////////
|
---|
| 1037 | //-- linear interpolate brightness key depending on the current sun position
|
---|
[2973] | 1038 |
|
---|
| 1039 | const float minKey = 0.09f;
|
---|
[3020] | 1040 | const float maxKey = 0.36f;
|
---|
[2973] | 1041 |
|
---|
| 1042 | const float lightIntensity = DotProd(-light->GetDirection(), Vector3::UNIT_Z());
|
---|
| 1043 | middleGrey = lightIntensity * maxKey + (1.0f - lightIntensity) * minKey;
|
---|
[2991] | 1044 |
|
---|
[2993] | 1045 |
|
---|
[2991] | 1046 | //////////
|
---|
| 1047 | //-- compute avg loglum
|
---|
| 1048 |
|
---|
| 1049 | ColorBufferObject *colorBuffer = fbo->GetColorBuffer(colorBufferIdx);
|
---|
[2992] | 1050 | GLuint colorsTex = colorBuffer->GetTexture();
|
---|
[2991] | 1051 |
|
---|
[3132] | 1052 | FlipFbos(fbo);
|
---|
[2991] | 1053 |
|
---|
[3035] | 1054 | sCgLogLumProgram->SetTexture(0, colorsTex);
|
---|
[3026] | 1055 | DrawQuad(sCgLogLumProgram);
|
---|
[2991] | 1056 |
|
---|
| 1057 | PrintGLerror("ToneMapParams");
|
---|
| 1058 |
|
---|
| 1059 |
|
---|
| 1060 | ///////////////////
|
---|
| 1061 | //-- compute avg loglum in scene using mipmapping
|
---|
| 1062 |
|
---|
[3008] | 1063 | glBindTexture(GL_TEXTURE_2D, fbo->GetColorBuffer(colorBufferIdx)->GetTexture());
|
---|
| 1064 | glGenerateMipmapEXT(GL_TEXTURE_2D);
|
---|
[2972] | 1065 | }
|
---|
| 1066 |
|
---|
| 1067 |
|
---|
[3003] | 1068 | static void ExportData(float *data, int w, int h)
|
---|
| 1069 | {
|
---|
| 1070 | startil();
|
---|
| 1071 |
|
---|
| 1072 | cout << "w: " << w << " h: " << h << endl;
|
---|
| 1073 | ILstring filename = ILstring("downsample2.jpg");
|
---|
| 1074 | ilRegisterType(IL_FLOAT);
|
---|
| 1075 |
|
---|
| 1076 | const int depth = 1;
|
---|
| 1077 | const int bpp = 4;
|
---|
| 1078 |
|
---|
| 1079 | if (!ilTexImage(w, h, depth, bpp, IL_RGBA, IL_FLOAT, data))
|
---|
| 1080 | {
|
---|
| 1081 | cerr << "IL error " << ilGetError() << endl;
|
---|
| 1082 | stopil();
|
---|
| 1083 | return;
|
---|
| 1084 | }
|
---|
| 1085 |
|
---|
| 1086 | if (!ilSaveImage(filename))
|
---|
| 1087 | {
|
---|
| 1088 | cerr << "TGA write error " << ilGetError() << endl;
|
---|
| 1089 | }
|
---|
| 1090 |
|
---|
| 1091 | stopil();
|
---|
| 1092 | }
|
---|
| 1093 |
|
---|
| 1094 |
|
---|
[3155] | 1095 | void DeferredRenderer::PrepareSsao(FrameBufferObject *fbo)
|
---|
| 1096 | {
|
---|
[3198] | 1097 | GLuint colorsTex = fbo->GetColorBuffer(colorBufferIdx)->GetTexture();
|
---|
[3199] | 1098 | GLuint normalsTex = fbo->GetColorBuffer(1)->GetTexture();
|
---|
[3198] | 1099 | GLuint diffVals = fbo->GetColorBuffer(2)->GetTexture();
|
---|
[3155] | 1100 | // flip flop between illumination buffers
|
---|
[3198] | 1101 | GLuint oldTex = mIllumFbo->GetColorBuffer(2 - mIllumFboIndex)->GetTexture();
|
---|
[3155] | 1102 |
|
---|
| 1103 | int i = 0;
|
---|
| 1104 |
|
---|
| 1105 | sCgPrepareSsaoProgram->SetTexture(i ++, colorsTex);
|
---|
[3199] | 1106 | sCgPrepareSsaoProgram->SetTexture(i ++, normalsTex);
|
---|
[3167] | 1107 | sCgPrepareSsaoProgram->SetTexture(i ++, diffVals);
|
---|
[3155] | 1108 | sCgPrepareSsaoProgram->SetTexture(i ++, oldTex);
|
---|
| 1109 |
|
---|
| 1110 | Vector3 de;
|
---|
| 1111 | de.x = mOldEyePos.x - mEyePos.x;
|
---|
| 1112 | de.y = mOldEyePos.y - mEyePos.y;
|
---|
| 1113 | de.z = mOldEyePos.z - mEyePos.z;
|
---|
| 1114 |
|
---|
| 1115 | sCgPrepareSsaoProgram->SetValue3f(i ++, de.x, de.y, de.z);
|
---|
| 1116 |
|
---|
[3156] | 1117 | sCgPrepareSsaoProgram->SetMatrix(i ++, mProjViewMatrix);
|
---|
| 1118 | sCgPrepareSsaoProgram->SetMatrix(i ++, mOldProjViewMatrix);
|
---|
| 1119 |
|
---|
| 1120 | for (int j = 0; j < 4; ++ j, ++ i)
|
---|
| 1121 | sCgPrepareSsaoProgram->SetValue3f(i, mOldCornersView[j].x, mOldCornersView[j].y, mOldCornersView[j].z);
|
---|
| 1122 |
|
---|
[3155] | 1123 | glPushAttrib(GL_VIEWPORT_BIT);
|
---|
| 1124 | glViewport(0, 0, mDownSampleFbo->GetWidth(), mDownSampleFbo->GetHeight());
|
---|
| 1125 |
|
---|
| 1126 | mDownSampleFbo->Bind();
|
---|
| 1127 |
|
---|
[3212] | 1128 | // prepare downsampled depth and normal texture for ssao
|
---|
[3199] | 1129 | glDrawBuffers(2, mrt);
|
---|
[3155] | 1130 |
|
---|
| 1131 | DrawQuad(sCgPrepareSsaoProgram);
|
---|
| 1132 |
|
---|
| 1133 | glPopAttrib();
|
---|
| 1134 | PrintGLerror("prepareSsao");
|
---|
| 1135 | }
|
---|
| 1136 |
|
---|
| 1137 |
|
---|
[3103] | 1138 | void DeferredRenderer::DownSample(FrameBufferObject *fbo,
|
---|
| 1139 | int bufferIdx,
|
---|
[3006] | 1140 | FrameBufferObject *downSampleFbo,
|
---|
[3137] | 1141 | int downSampleBufferIdx,
|
---|
| 1142 | ShaderProgram *program)
|
---|
[2972] | 1143 | {
|
---|
[3137] | 1144 | ColorBufferObject *buffer = fbo->GetColorBuffer(bufferIdx);
|
---|
| 1145 | GLuint tex = buffer->GetTexture();
|
---|
[3006] | 1146 |
|
---|
| 1147 | glPushAttrib(GL_VIEWPORT_BIT);
|
---|
| 1148 | glViewport(0, 0, downSampleFbo->GetWidth(), downSampleFbo->GetHeight());
|
---|
[2972] | 1149 |
|
---|
[3137] | 1150 | downSampleFbo->Bind();
|
---|
[2994] | 1151 |
|
---|
[3137] | 1152 | program->SetTexture(0, tex);
|
---|
[3006] | 1153 | glDrawBuffers(1, mrt + downSampleBufferIdx);
|
---|
[2994] | 1154 |
|
---|
[3137] | 1155 | DrawQuad(program);
|
---|
[3005] | 1156 |
|
---|
[3006] | 1157 | glPopAttrib();
|
---|
[3005] | 1158 | PrintGLerror("downsample");
|
---|
[2972] | 1159 | }
|
---|
| 1160 |
|
---|
| 1161 |
|
---|
[2973] | 1162 | void DeferredRenderer::ToneMap(FrameBufferObject *fbo,
|
---|
| 1163 | float imageKey,
|
---|
| 1164 | float whiteLum,
|
---|
| 1165 | float middleGrey)
|
---|
[2972] | 1166 | {
|
---|
| 1167 | ColorBufferObject *colorBuffer = fbo->GetColorBuffer(colorBufferIdx);
|
---|
[2994] | 1168 | GLuint colorsTex = colorBuffer->GetTexture();
|
---|
[3132] | 1169 | //FrameBufferObject::Release();
|
---|
[2972] | 1170 |
|
---|
[3132] | 1171 | FlipFbos(fbo);
|
---|
[3007] | 1172 |
|
---|
[3035] | 1173 | sCgToneProgram->SetTexture(0, colorsTex);
|
---|
| 1174 | sCgToneProgram->SetValue1f(1, imageKey);
|
---|
| 1175 | sCgToneProgram->SetValue1f(2, whiteLum);
|
---|
| 1176 | sCgToneProgram->SetValue1f(3, middleGrey);
|
---|
[3007] | 1177 |
|
---|
[3026] | 1178 | DrawQuad(sCgToneProgram);
|
---|
[2972] | 1179 |
|
---|
[2973] | 1180 | PrintGLerror("ToneMap");
|
---|
[2972] | 1181 | }
|
---|
| 1182 |
|
---|
| 1183 |
|
---|
[3132] | 1184 | void DeferredRenderer::Output(FrameBufferObject *fbo)
|
---|
| 1185 | {
|
---|
| 1186 | glPushAttrib(GL_VIEWPORT_BIT);
|
---|
| 1187 | glViewport(0, 0, fbo->GetWidth(), fbo->GetHeight());
|
---|
| 1188 |
|
---|
| 1189 | ColorBufferObject *colorBuffer = fbo->GetColorBuffer(colorBufferIdx);
|
---|
| 1190 | GLuint colorsTex = colorBuffer->GetTexture();
|
---|
| 1191 |
|
---|
| 1192 | sCgDownSampleProgram->SetTexture(0, colorsTex);
|
---|
| 1193 |
|
---|
| 1194 | FrameBufferObject::Release();
|
---|
| 1195 | DrawQuad(sCgDownSampleProgram);
|
---|
| 1196 |
|
---|
[3134] | 1197 | PrintGLerror("output");
|
---|
[3132] | 1198 | }
|
---|
| 1199 |
|
---|
| 1200 |
|
---|
[3085] | 1201 | void DeferredRenderer::InitFrame()
|
---|
| 1202 | {
|
---|
[3095] | 1203 | for (int i = 0; i < 4; ++ i)
|
---|
| 1204 | mOldCornersView[i] = mCornersView[i];
|
---|
| 1205 |
|
---|
[3085] | 1206 | mOldProjViewMatrix = mProjViewMatrix;
|
---|
[3095] | 1207 | mOldEyePos = mEyePos;
|
---|
[3106] | 1208 | mEyePos = mCamera->GetPosition();
|
---|
[3081] | 1209 |
|
---|
[3104] | 1210 | // hack: temporarily change far to improve precision
|
---|
| 1211 | const float oldFar = mCamera->GetFar();
|
---|
[3106] | 1212 | const float oldNear = mCamera->GetNear();
|
---|
[3132] | 1213 |
|
---|
[3104] | 1214 |
|
---|
[3106] | 1215 | Matrix4x4 matViewing, matProjection;
|
---|
[3104] | 1216 |
|
---|
[3106] | 1217 |
|
---|
| 1218 | ///////////////////
|
---|
| 1219 |
|
---|
[3213] | 1220 | // use view orientation as we assume that the eye point is always in the center
|
---|
| 1221 | // of our coordinate system, this way we have the highest precision near the eye point
|
---|
[3093] | 1222 | mCamera->GetViewOrientationMatrix(matViewing);
|
---|
[3085] | 1223 | mCamera->GetProjectionMatrix(matProjection);
|
---|
| 1224 |
|
---|
| 1225 | mProjViewMatrix = matViewing * matProjection;
|
---|
[3095] | 1226 | ComputeViewVectors(mCamera, mCornersView[0], mCornersView[1], mCornersView[2], mCornersView[3]);
|
---|
[3106] | 1227 |
|
---|
[3085] | 1228 |
|
---|
[3095] | 1229 | // switch roles of old and new fbo
|
---|
| 1230 | // the algorihm uses two input fbos, where the one
|
---|
| 1231 | // contais the color buffer from the last frame,
|
---|
| 1232 | // the other one will be written
|
---|
[3085] | 1233 |
|
---|
[3095] | 1234 | mIllumFboIndex = 2 - mIllumFboIndex;
|
---|
| 1235 |
|
---|
| 1236 | // enable fragment shading
|
---|
| 1237 | ShaderManager::GetSingleton()->EnableFragmentProfile();
|
---|
| 1238 |
|
---|
| 1239 | glDisable(GL_ALPHA_TEST);
|
---|
| 1240 | glDisable(GL_TEXTURE_2D);
|
---|
| 1241 | glDisable(GL_LIGHTING);
|
---|
| 1242 | glDisable(GL_BLEND);
|
---|
| 1243 | glDisable(GL_DEPTH_TEST);
|
---|
| 1244 |
|
---|
| 1245 | glPolygonMode(GL_FRONT, GL_FILL);
|
---|
| 1246 |
|
---|
| 1247 | glMatrixMode(GL_PROJECTION);
|
---|
| 1248 | glPushMatrix();
|
---|
| 1249 | glLoadIdentity();
|
---|
| 1250 |
|
---|
| 1251 | gluOrtho2D(0, 1, 0, 1);
|
---|
| 1252 |
|
---|
| 1253 |
|
---|
| 1254 | glMatrixMode(GL_MODELVIEW);
|
---|
| 1255 | glPushMatrix();
|
---|
| 1256 | glLoadIdentity();
|
---|
| 1257 |
|
---|
| 1258 |
|
---|
| 1259 | glPushAttrib(GL_VIEWPORT_BIT);
|
---|
| 1260 | glViewport(0, 0, mWidth, mHeight);
|
---|
[3128] | 1261 |
|
---|
| 1262 | // revert to old far and near plane
|
---|
[3104] | 1263 | mCamera->SetFar(oldFar);
|
---|
[3106] | 1264 | mCamera->SetNear(oldNear);
|
---|
[3085] | 1265 | }
|
---|
| 1266 |
|
---|
[3212] | 1267 |
|
---|
[3213] | 1268 | void DeferredRenderer::LenseFlare(FrameBufferObject *fbo,
|
---|
[3215] | 1269 | DirectionalLight *light
|
---|
[3213] | 1270 | )
|
---|
[3212] | 1271 | {
|
---|
[3242] | 1272 | // light source visible?
|
---|
[3215] | 1273 | if (!mSunVisiblePixels) return;
|
---|
| 1274 |
|
---|
[3213] | 1275 | // the sun is a large distance in the reverse light direction
|
---|
| 1276 | // => extrapolate light pos
|
---|
| 1277 | const Vector3 lightPos = light->GetDirection() * -1e3f;
|
---|
| 1278 |
|
---|
[3214] | 1279 | float w;
|
---|
| 1280 | Vector3 projLightPos = mProjViewMatrix.Transform(w, lightPos, 1.0f);
|
---|
| 1281 | projLightPos /= w;
|
---|
| 1282 | projLightPos = projLightPos * 0.5f + Vector3(0.5f);
|
---|
[3213] | 1283 |
|
---|
| 1284 | // vector to light from screen center in texture space
|
---|
| 1285 | Vector3 vectorToLight = projLightPos - Vector3(0.5f);
|
---|
| 1286 | vectorToLight.z = .0f;
|
---|
| 1287 |
|
---|
| 1288 | const float distanceToLight = Magnitude(vectorToLight);
|
---|
| 1289 | vectorToLight /= distanceToLight;
|
---|
| 1290 |
|
---|
[3214] | 1291 | //cout << "dist " << distanceToLight << " v " << vectorToLight << endl;
|
---|
[3213] | 1292 |
|
---|
| 1293 |
|
---|
[3212] | 1294 | ColorBufferObject *colorBuffer = fbo->GetColorBuffer(colorBufferIdx);
|
---|
[3213] | 1295 | GLuint colorsTex = colorBuffer->GetTexture();
|
---|
| 1296 |
|
---|
[3212] | 1297 | FlipFbos(fbo);
|
---|
| 1298 |
|
---|
[3213] | 1299 | int i = 0;
|
---|
[3212] | 1300 |
|
---|
[3213] | 1301 | sCgLenseFlareProgram->SetTexture(i ++, colorsTex);
|
---|
| 1302 | sCgLenseFlareProgram->SetTexture(i ++, sHaloTex[0]->GetId());
|
---|
| 1303 | sCgLenseFlareProgram->SetTexture(i ++, sHaloTex[1]->GetId());
|
---|
| 1304 | sCgLenseFlareProgram->SetTexture(i ++, sHaloTex[2]->GetId());
|
---|
| 1305 | sCgLenseFlareProgram->SetTexture(i ++, sHaloTex[3]->GetId());
|
---|
[3214] | 1306 | sCgLenseFlareProgram->SetTexture(i ++, sHaloTex[4]->GetId());
|
---|
[3213] | 1307 | sCgLenseFlareProgram->SetValue2f(i ++, vectorToLight.x, vectorToLight.y);
|
---|
| 1308 | sCgLenseFlareProgram->SetValue1f(i ++, distanceToLight);
|
---|
[3215] | 1309 | sCgLenseFlareProgram->SetValue1f(i ++, (float)mSunVisiblePixels);
|
---|
[3213] | 1310 |
|
---|
[3212] | 1311 | DrawQuad(sCgLenseFlareProgram);
|
---|
| 1312 |
|
---|
| 1313 | PrintGLerror("LenseFlare");
|
---|
| 1314 | }
|
---|
| 1315 |
|
---|
| 1316 |
|
---|
[3232] | 1317 | void DeferredRenderer::DepthOfField(FrameBufferObject *fbo)
|
---|
| 1318 | {
|
---|
| 1319 | ColorBufferObject *colorBuffer = fbo->GetColorBuffer(colorBufferIdx);
|
---|
| 1320 | GLuint colorsTex = colorBuffer->GetTexture();
|
---|
| 1321 |
|
---|
| 1322 | FlipFbos(fbo);
|
---|
| 1323 |
|
---|
| 1324 | int i = 0;
|
---|
| 1325 |
|
---|
[3235] | 1326 | const float zFocus = 7.0f;
|
---|
| 1327 |
|
---|
[3232] | 1328 | sCgDOFProgram->SetTexture(i ++, colorsTex);
|
---|
| 1329 | sCgDOFProgram->SetArray2f(i ++, (float *)dofSamples, NUM_DOF_TABS);
|
---|
[3235] | 1330 | sCgDOFProgram->SetValue1f(i ++, min(mCamera->GetFar(), mMaxDistance) - mCamera->GetNear());
|
---|
| 1331 | sCgDOFProgram->SetValue1f(i ++, zFocus);
|
---|
[3232] | 1332 |
|
---|
| 1333 | DrawQuad(sCgDOFProgram);
|
---|
| 1334 |
|
---|
| 1335 | PrintGLerror("LenseFlare");
|
---|
| 1336 | }
|
---|
| 1337 |
|
---|
| 1338 |
|
---|
[3219] | 1339 | void DeferredRenderer::SaveFrame(FrameBufferObject *fbo)
|
---|
| 1340 | {
|
---|
| 1341 | ColorBufferObject *colorBuffer = fbo->GetColorBuffer(colorBufferIdx);
|
---|
| 1342 | GLuint colorsTex = colorBuffer->GetTexture();
|
---|
[3215] | 1343 |
|
---|
[3219] | 1344 | GLubyte *data = new GLubyte[mWidth * mHeight * 4];
|
---|
| 1345 |
|
---|
| 1346 | // grab texture data
|
---|
| 1347 | glEnable(GL_TEXTURE_2D);
|
---|
| 1348 | glBindTexture(GL_TEXTURE_2D, colorsTex);
|
---|
| 1349 | glGetTexImage(GL_TEXTURE_2D, 0, GL_RGBA, GL_UNSIGNED_BYTE, data);
|
---|
| 1350 |
|
---|
| 1351 | glBindTexture(GL_TEXTURE_2D, 0);
|
---|
| 1352 | glDisable(GL_TEXTURE_2D);
|
---|
| 1353 |
|
---|
| 1354 | /////////////////
|
---|
| 1355 |
|
---|
| 1356 | startil();
|
---|
| 1357 |
|
---|
| 1358 | static char imageName[200];
|
---|
[3220] | 1359 | sprintf(imageName, "%s_%05d.bmp", mSavedFrameSuffix.c_str(), mSavedFrameNumber);
|
---|
[3219] | 1360 |
|
---|
| 1361 | ILstring fileName = ILstring(imageName);
|
---|
| 1362 | ilRegisterType(IL_FLOAT);
|
---|
| 1363 |
|
---|
| 1364 | const int depth = 1;
|
---|
| 1365 | const int bpp = 4;
|
---|
| 1366 |
|
---|
| 1367 | if (!ilTexImage(mWidth, mHeight, depth, bpp, IL_RGBA, IL_UNSIGNED_BYTE, data))
|
---|
| 1368 | {
|
---|
| 1369 | cerr << "IL error " << ilGetError() << endl;
|
---|
| 1370 | stopil();
|
---|
| 1371 | return;
|
---|
| 1372 | }
|
---|
| 1373 |
|
---|
| 1374 | ilEnable(IL_FILE_OVERWRITE);
|
---|
| 1375 |
|
---|
| 1376 | if (!ilSaveImage(fileName))
|
---|
| 1377 | {
|
---|
| 1378 | cerr << "TGA write error " << ilGetError() << endl;
|
---|
| 1379 | }
|
---|
| 1380 |
|
---|
| 1381 | delete [] data;
|
---|
| 1382 |
|
---|
| 1383 | stopil();
|
---|
| 1384 |
|
---|
| 1385 | PrintGLerror("Store frame");
|
---|
| 1386 | }
|
---|
| 1387 |
|
---|
| 1388 |
|
---|
[3215] | 1389 | void DeferredRenderer::SetUseTemporalCoherence(bool temporal)
|
---|
| 1390 | {
|
---|
| 1391 | mUseTemporalCoherence = temporal;
|
---|
| 1392 | }
|
---|
| 1393 |
|
---|
| 1394 |
|
---|
| 1395 | void DeferredRenderer::SetSamplingMethod(SAMPLING_METHOD s)
|
---|
| 1396 | {
|
---|
| 1397 | if (s != mSamplingMethod)
|
---|
| 1398 | {
|
---|
| 1399 | mSamplingMethod = s;
|
---|
| 1400 | mRegenerateSamples = true;
|
---|
| 1401 | }
|
---|
| 1402 | }
|
---|
| 1403 |
|
---|
| 1404 |
|
---|
| 1405 | void DeferredRenderer::SetShadingMethod(SHADING_METHOD s)
|
---|
| 1406 | {
|
---|
| 1407 | if (s != mShadingMethod)
|
---|
| 1408 | {
|
---|
| 1409 | mShadingMethod = s;
|
---|
| 1410 | mRegenerateSamples = true;
|
---|
| 1411 | }
|
---|
| 1412 | }
|
---|
| 1413 |
|
---|
| 1414 |
|
---|
| 1415 | #if TODO
|
---|
| 1416 |
|
---|
| 1417 | void DeferredRenderer::SetNumSamples(int numSamples)
|
---|
| 1418 | {
|
---|
| 1419 | mNumSamples = numSamples;
|
---|
| 1420 | }
|
---|
| 1421 |
|
---|
| 1422 | #endif
|
---|
| 1423 |
|
---|
| 1424 |
|
---|
| 1425 | void DeferredRenderer::SetSampleIntensity(float sampleIntensity)
|
---|
| 1426 | {
|
---|
| 1427 | mSampleIntensity = sampleIntensity;
|
---|
| 1428 | }
|
---|
| 1429 |
|
---|
| 1430 |
|
---|
| 1431 | void DeferredRenderer::SetKernelRadius(float kernelRadius)
|
---|
| 1432 | {
|
---|
| 1433 | mKernelRadius = kernelRadius;
|
---|
| 1434 | }
|
---|
| 1435 |
|
---|
| 1436 |
|
---|
[3216] | 1437 | void DeferredRenderer::SetSsaoFilterRadius(float ssaoFilterRadius)
|
---|
| 1438 | {
|
---|
| 1439 | mSsaoFilterRadius = ssaoFilterRadius;
|
---|
| 1440 | }
|
---|
| 1441 |
|
---|
| 1442 |
|
---|
[3242] | 1443 | /*void DeferredRenderer::SetSortSamples(bool sortSamples)
|
---|
[3215] | 1444 | {
|
---|
| 1445 | mSortSamples = sortSamples;
|
---|
[3242] | 1446 | }*/
|
---|
[3215] | 1447 |
|
---|
| 1448 |
|
---|
| 1449 | void DeferredRenderer::SetSunVisiblePixels(int pixels)
|
---|
| 1450 | {
|
---|
| 1451 | mSunVisiblePixels = pixels;
|
---|
| 1452 | }
|
---|
| 1453 |
|
---|
| 1454 |
|
---|
[3235] | 1455 | void DeferredRenderer::SetMaxDistance(float maxDist)
|
---|
| 1456 | {
|
---|
| 1457 | mMaxDistance = maxDist;
|
---|
| 1458 | }
|
---|
| 1459 |
|
---|
| 1460 |
|
---|
[3242] | 1461 | void DeferredRenderer::SetUseToneMapping(bool toneMapping)
|
---|
| 1462 | {
|
---|
| 1463 | mUseToneMapping = toneMapping;
|
---|
| 1464 | }
|
---|
| 1465 |
|
---|
| 1466 |
|
---|
| 1467 | void DeferredRenderer::SetUseAntiAliasing(bool antiAliasing)
|
---|
| 1468 | {
|
---|
| 1469 | mUseAntiAliasing = antiAliasing;
|
---|
| 1470 | }
|
---|
| 1471 |
|
---|
| 1472 |
|
---|
| 1473 | void DeferredRenderer::SetUseDepthOfField(bool dof)
|
---|
| 1474 | {
|
---|
| 1475 | mUseDepthOfField = dof;
|
---|
| 1476 | }
|
---|
| 1477 |
|
---|
| 1478 |
|
---|
| 1479 | void DeferredRenderer::SetTemporalCoherenceFactorForSsao(float factor)
|
---|
| 1480 | {
|
---|
| 1481 | mTempCohFactor = factor;
|
---|
| 1482 | }
|
---|
| 1483 |
|
---|
| 1484 |
|
---|
[3220] | 1485 | void DeferredRenderer::SetSaveFrame(const string &suffix, int frameNumber)
|
---|
[3219] | 1486 | {
|
---|
[3220] | 1487 | mSavedFrameSuffix = suffix;
|
---|
[3219] | 1488 | mSavedFrameNumber = frameNumber;
|
---|
| 1489 | }
|
---|
[3215] | 1490 |
|
---|
[3219] | 1491 |
|
---|
[2858] | 1492 | } // namespace
|
---|