[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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[2858] | 12 |
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[3003] | 13 | #include <IL/il.h>
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| 14 | #include <assert.h>
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[2859] | 15 |
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[3003] | 16 |
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[3021] | 17 | #ifdef _CRT_SET
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| 18 | #define _CRTDBG_MAP_ALLOC
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| 19 | #include <stdlib.h>
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| 20 | #include <crtdbg.h>
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| 21 |
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| 22 | // redefine new operator
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| 23 | #define DEBUG_NEW new(_NORMAL_BLOCK, __FILE__, __LINE__)
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| 24 | #define new DEBUG_NEW
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| 25 | #endif
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| 26 |
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| 27 |
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[2858] | 28 | using namespace std;
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| 29 |
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| 30 |
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[3003] | 31 | static void startil()
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| 32 | {
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| 33 | ilInit();
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| 34 | assert(ilGetError() == IL_NO_ERROR);
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| 35 | }
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| 36 |
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| 37 |
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| 38 | static void stopil()
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| 39 | {
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| 40 | ilShutDown();
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| 41 | assert(ilGetError() == IL_NO_ERROR);
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| 42 | }
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| 43 |
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[2858] | 44 | namespace CHCDemoEngine
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| 45 | {
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| 46 |
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[3026] | 47 | static ShaderProgram *sCgSsaoProgram = NULL;
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| 48 | static ShaderProgram *sCgGiProgram = NULL;
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[2873] | 49 |
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[3026] | 50 | static ShaderProgram *sCgDeferredProgram = NULL;
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| 51 | static ShaderProgram *sCgAntiAliasingProgram = NULL;
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| 52 | static ShaderProgram *sCgDeferredShadowProgram = NULL;
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[2859] | 53 |
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[3026] | 54 | static ShaderProgram *sCgCombineSsaoProgram = NULL;
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| 55 | static ShaderProgram *sCgCombineIllumProgram = NULL;
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| 56 | static ShaderProgram *sCgLogLumProgram = NULL;
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| 57 | static ShaderProgram *sCgToneProgram = NULL;
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| 58 | static ShaderProgram *sCgDownSampleProgram = NULL;
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[2869] | 59 |
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[3019] | 60 | ShaderContainer DeferredRenderer::sShaders;
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[2992] | 61 |
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[2879] | 62 | static GLuint noiseTex = 0;
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[2865] | 63 |
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[2859] | 64 | // ssao random spherical samples
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[2903] | 65 | static Sample2 samples2[NUM_SAMPLES];
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[2966] | 66 | // number of pcf tabs
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[3103] | 67 | static Sample2 pcfSamples[NUM_PCF_TABS];
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[2966] | 68 |
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[3026] | 69 |
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[3103] | 70 | static float ssaoFilterOffsets[NUM_SSAO_FILTERSAMPLES * 2];
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| 71 | static float ssaoFilterWeights[NUM_SSAO_FILTERSAMPLES];
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| 72 |
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| 73 |
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[3110] | 74 | int DeferredRenderer::colorBufferIdx = 3;
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[2859] | 75 |
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[2992] | 76 |
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[3085] | 77 | /** Helper method that computes the view vectors in the corners of the current view frustum.
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| 78 | */
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| 79 | static void ComputeViewVectors(PerspectiveCamera *cam, Vector3 &bl, Vector3 &br, Vector3 &tl, Vector3 &tr)
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| 80 | {
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| 81 | Vector3 ftl, ftr, fbl, fbr, ntl, ntr, nbl, nbr;
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| 82 | cam->ComputePoints(ftl, ftr, fbl, fbr, ntl, ntr, nbl, nbr);
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| 83 |
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| 84 | bl = Normalize(nbl - fbl);
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| 85 | br = Normalize(nbr - fbr);
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| 86 | tl = Normalize(ntl - ftl);
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| 87 | tr = Normalize(ntr - ftr);
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| 88 | }
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| 89 |
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| 90 |
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[3025] | 91 | static float GaussianDistribution(float x, float y, float rho)
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| 92 | {
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[3110] | 93 | float g = 1.0f / sqrtf(2.0f * M_PI * rho * rho);
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[3025] | 94 | g *= expf( -(x*x + y*y) / (2.0f * rho * rho));
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| 95 |
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| 96 | return g;
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| 97 | }
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| 98 |
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| 99 |
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[2859] | 100 | static void PrintGLerror(char *msg)
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| 101 | {
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| 102 | GLenum errCode;
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| 103 | const GLubyte *errStr;
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| 104 |
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| 105 | if ((errCode = glGetError()) != GL_NO_ERROR)
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| 106 | {
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| 107 | errStr = gluErrorString(errCode);
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| 108 | fprintf(stderr,"OpenGL ERROR: %s: %s\n", errStr, msg);
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| 109 | }
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| 110 | }
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| 111 |
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[3017] | 112 | static void ComputeSampleOffsets(float *sampleOffsets, int w, int h)
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| 113 | {
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| 114 | /*
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| 115 | const float xoffs = 0.5f / w;
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| 116 | const float yoffs = 0.5f / h;
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[2859] | 117 |
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[3017] | 118 | sampleOffsets[0] = xoffs; sampleOffsets[1] = yoffs;
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| 119 | sampleOffsets[2] = xoffs; sampleOffsets[3] = -yoffs;
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| 120 | sampleOffsets[4] = -xoffs; sampleOffsets[5] = -yoffs;
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| 121 | sampleOffsets[6] = -xoffs; sampleOffsets[7] = yoffs;
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| 122 | */
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| 123 | //const float xoffs = .5f / w;
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| 124 | //const float yoffs = .5f / h;
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| 125 |
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| 126 | const float xoffs = 1.0f / w;
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| 127 | const float yoffs = 1.0f / h;
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[2976] | 128 |
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[3017] | 129 | int idx = 0;
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| 130 |
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| 131 | for (int x = -1; x <= 1; ++ x)
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| 132 | {
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| 133 | for (int y = -1; y <= 1; ++ y)
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| 134 | {
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| 135 | sampleOffsets[idx + 0] = x * xoffs;
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| 136 | sampleOffsets[idx + 1] = y * yoffs;
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| 137 |
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| 138 | idx += 2;
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| 139 | }
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| 140 | }
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| 141 | }
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| 142 |
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[3026] | 143 |
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| 144 | void DeferredRenderer::DrawQuad(ShaderProgram *p)
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| 145 | {
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| 146 | p->Bind();
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| 147 |
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[3089] | 148 | // interpolate the view vector
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[3085] | 149 | Vector3 bl = mCornersView[0];
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| 150 | Vector3 br = mCornersView[1];
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| 151 | Vector3 tl = mCornersView[2];
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| 152 | Vector3 tr = mCornersView[3];
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| 153 |
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[3026] | 154 | // note: slightly larger texture could hide ambient occlusion error on border but costs resolution
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| 155 | glBegin(GL_QUADS);
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| 156 |
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[3093] | 157 | glTexCoord2f(0, 0); glMultiTexCoord3fARB(GL_TEXTURE1_ARB, bl.x, bl.y, bl.z); glVertex2f( .0f, .0f);
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| 158 | glTexCoord2f(1, 0); glMultiTexCoord3fARB(GL_TEXTURE1_ARB, br.x, br.y, br.z); glVertex2f(1.0f, .0f);
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| 159 | glTexCoord2f(1, 1); glMultiTexCoord3fARB(GL_TEXTURE1_ARB, tr.x, tr.y, tr.z); glVertex2f(1.0f, 1.0f);
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| 160 | glTexCoord2f(0, 1); glMultiTexCoord3fARB(GL_TEXTURE1_ARB, tl.x, tl.y, tl.z); glVertex2f( .0f, 1.0f);
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[3026] | 161 |
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| 162 | glEnd();
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| 163 | }
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| 164 |
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| 165 |
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[2859] | 166 | /** Generate poisson disc distributed sample points on the unit disc
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| 167 | */
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[2887] | 168 | static void GenerateSamples(int sampling)
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[2859] | 169 | {
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[2887] | 170 | switch (sampling)
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| 171 | {
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[2930] | 172 | case DeferredRenderer::SAMPLING_POISSON:
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[2887] | 173 | {
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[2930] | 174 | PoissonDiscSampleGenerator2 poisson(NUM_SAMPLES, 1.0f);
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[2900] | 175 | poisson.Generate((float *)samples2);
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[2887] | 176 | }
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| 177 | break;
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[2930] | 178 | case DeferredRenderer::SAMPLING_QUADRATIC:
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[2887] | 179 | {
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[2930] | 180 | QuadraticDiscSampleGenerator2 g(NUM_SAMPLES, 1.0f);
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| 181 | g.Generate((float *)samples2);
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[2887] | 182 | }
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| 183 | break;
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[2930] | 184 | default: // SAMPLING_DEFAULT
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[3026] | 185 | {
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| 186 | RandomSampleGenerator2 g(NUM_SAMPLES, 1.0f);
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| 187 | g.Generate((float *)samples2);
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| 188 | }
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[2903] | 189 | }
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[2859] | 190 | }
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| 191 |
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| 192 |
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[2879] | 193 | static void CreateNoiseTex2D(int w, int h)
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| 194 | {
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| 195 | //GLubyte *randomNormals = new GLubyte[mWidth * mHeight * 3];
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| 196 | float *randomNormals = new float[w * h * 3];
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| 197 |
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[2900] | 198 | static HaltonSequence halton;
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| 199 | float r[2];
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| 200 |
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[2879] | 201 | for (int i = 0; i < w * h * 3; i += 3)
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| 202 | {
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[2903] | 203 | // create random samples on a circle
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| 204 | r[0] = RandomValue(0, 1);
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| 205 | //halton.GetNext(1, r);
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| 206 |
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| 207 | const float theta = 2.0f * acos(sqrt(1.0f - r[0]));
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| 208 |
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| 209 | randomNormals[i + 0] = cos(theta);
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| 210 | randomNormals[i + 1] = sin(theta);
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| 211 | randomNormals[i + 2] = 0;
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[2879] | 212 | }
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| 213 |
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| 214 | glEnable(GL_TEXTURE_2D);
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| 215 | glGenTextures(1, &noiseTex);
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| 216 | glBindTexture(GL_TEXTURE_2D, noiseTex);
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| 217 |
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| 218 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
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| 219 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
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| 220 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
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| 221 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
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| 222 |
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| 223 | glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA16F_ARB, w, h, 0, GL_RGB, GL_FLOAT, randomNormals);
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| 224 |
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| 225 | glBindTexture(GL_TEXTURE_2D, 0);
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| 226 | glDisable(GL_TEXTURE_2D);
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| 227 |
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| 228 | delete [] randomNormals;
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| 229 |
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| 230 | cout << "created noise texture" << endl;
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| 231 |
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| 232 | PrintGLerror("noisetexture");
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| 233 | }
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| 234 |
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| 235 |
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[3019] | 236 | static void InitBuffer(FrameBufferObject *fbo, int index)
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| 237 | {
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| 238 | // read the second buffer, write to the first buffer
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| 239 | fbo->Bind();
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| 240 | glDrawBuffers(1, mrt + index);
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| 241 |
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| 242 | glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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| 243 |
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| 244 | FrameBufferObject::Release();
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| 245 | }
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| 246 |
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| 247 |
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[3068] | 248 | DeferredRenderer::DeferredRenderer(int w, int h, PerspectiveCamera *cam):
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[2860] | 249 | mWidth(w), mHeight(h),
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| 250 | mCamera(cam),
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[2875] | 251 | mUseTemporalCoherence(true),
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[2895] | 252 | mRegenerateSamples(true),
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[2930] | 253 | mSamplingMethod(SAMPLING_POISSON),
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[2895] | 254 | mShadingMethod(DEFAULT),
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[3111] | 255 | mIllumFboIndex(0),
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| 256 | invTrafo(IdentityMatrix())
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[2861] | 257 | {
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| 258 | ///////////
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| 259 | //-- the flip-flop fbos
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[2859] | 260 |
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[3103] | 261 | const int dsw = w / 2;
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| 262 | const int dsh = h / 2;
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| 263 |
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[3107] | 264 | //const int dsw = w;
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| 265 | //const int dsh = h;
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| 266 |
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[3103] | 267 | mIllumFbo = new FrameBufferObject(dsw, dsh, FrameBufferObject::DEPTH_NONE);
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[3094] | 268 | //mIllumFbo = new FrameBufferObject(w, h, FrameBufferObject::DEPTH_NONE);
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| 269 |
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[3019] | 270 | mFBOs.push_back(mIllumFbo);
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[2891] | 271 |
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[3019] | 272 | for (int i = 0; i < 4; ++ i)
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| 273 | {
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[3088] | 274 | mIllumFbo->AddColorBuffer(ColorBufferObject::RGBA_FLOAT_32, ColorBufferObject::WRAP_CLAMP_TO_EDGE, ColorBufferObject::FILTER_LINEAR);
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[3019] | 275 | InitBuffer(mIllumFbo, i);
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| 276 | }
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[3002] | 277 |
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[3103] | 278 | mDownSampleFbo = new FrameBufferObject(dsw, dsh, FrameBufferObject::DEPTH_NONE);
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[3094] | 279 | //mDownSampleFbo = new FrameBufferObject(w, h, FrameBufferObject::DEPTH_NONE);
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[3002] | 280 | mDownSampleFbo->AddColorBuffer(ColorBufferObject::RGBA_FLOAT_32, ColorBufferObject::WRAP_CLAMP_TO_EDGE, ColorBufferObject::FILTER_LINEAR);
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[3087] | 281 | // downsample buffer for the normal texture
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[3017] | 282 | mDownSampleFbo->AddColorBuffer(ColorBufferObject::RGB_FLOAT_16, ColorBufferObject::WRAP_CLAMP_TO_EDGE, ColorBufferObject::FILTER_LINEAR);
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[3019] | 283 |
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| 284 | mFBOs.push_back(mDownSampleFbo);
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[3038] | 285 |
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[3084] | 286 | // create noise texture for ssao
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[3103] | 287 | //CreateNoiseTex2D(mIllumFbo->GetWidth(), mIllumFbo->GetHeight());
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| 288 | CreateNoiseTex2D(mWidth / 8, mHeight / 8);
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[3084] | 289 |
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[3085] | 290 | mProjViewMatrix = IdentityMatrix();
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| 291 | mOldProjViewMatrix = IdentityMatrix();
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| 292 |
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| 293 | for (int i = 0; i < 4; ++ i)
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| 294 | {
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| 295 | mCornersView[i] = mOldCornersView[i] = Vector3::UNIT_X();
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| 296 | }
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| 297 |
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| 298 | mEyePos = mOldEyePos = Vector3::ZERO();
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| 299 |
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[3038] | 300 | InitCg();
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[2861] | 301 | }
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| 302 |
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| 303 |
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[2896] | 304 | DeferredRenderer::~DeferredRenderer()
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[2861] | 305 | {
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[3019] | 306 | CLEAR_CONTAINER(mFBOs);
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[2861] | 307 | glDeleteTextures(1, &noiseTex);
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| 308 | }
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| 309 |
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| 310 |
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[2896] | 311 | void DeferredRenderer::SetUseTemporalCoherence(bool temporal)
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[2875] | 312 | {
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| 313 | mUseTemporalCoherence = temporal;
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| 314 | }
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| 315 |
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| 316 |
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[3021] | 317 |
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[3038] | 318 | void DeferredRenderer::InitCg()
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[3026] | 319 | {
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[3057] | 320 | ShaderManager *sm = ShaderManager::GetSingleton();
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[2873] | 321 |
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[3057] | 322 | sCgDeferredProgram = sm->CreateFragmentProgram("deferred", "main", "deferredFrag");
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| 323 | sCgDeferredShadowProgram = sm->CreateFragmentProgram("deferred", "main_shadow", "deferredFragShader");
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| 324 | sCgSsaoProgram = sm->CreateFragmentProgram("ssao", "main", "ssaoFrag");
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| 325 | sCgGiProgram = sm->CreateFragmentProgram("globillum", "main", "giFrag");
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| 326 | sCgCombineIllumProgram = sm->CreateFragmentProgram("globillum", "combine", "combineGi");
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[3104] | 327 | //sCgCombineSsaoProgram = sm->CreateFragmentProgram("combineSsao", "combine", "combineSsao");
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| 328 | sCgCombineSsaoProgram = sm->CreateFragmentProgram("ssao", "combine", "combineSsao");
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[3057] | 329 | sCgAntiAliasingProgram = sm->CreateFragmentProgram("antialiasing", "main", "antiAliasing");
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| 330 | sCgToneProgram = sm->CreateFragmentProgram("tonemap", "ToneMap", "toneMap");
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| 331 | sCgDownSampleProgram = sm->CreateFragmentProgram("tonemap", "DownSample", "downSample");
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| 332 | sCgLogLumProgram = sm->CreateFragmentProgram("tonemap", "CalcAvgLogLum", "avgLogLum");
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[3038] | 333 |
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[3034] | 334 |
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[3104] | 335 | ///////////////////
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| 336 | //-- initialize program parameters
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[3034] | 337 |
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[3104] | 338 | string ssaoParams[] =
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| 339 | {"colors", "normals", "oldTex", "noiseTex", "temporalCoherence",
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[3111] | 340 | "samples", "bl", "br", "tl", "tr",
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| 341 | "modelViewProj", "oldModelViewProj", "oldEyePos", "oldbl", "oldbr",
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[3113] | 342 | "oldtl", "oldtr", "attribsTex"};
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| 343 | sCgSsaoProgram->AddParameters(ssaoParams, 0, 18);
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[3085] | 344 |
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[3104] | 345 | string giParams[] =
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| 346 | {"colors", "normals", "noiseTex", "oldSsaoTex", "oldIllumTex",
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[3111] | 347 | "temporalCoherence", "samples", "bl", "br", "tl",
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| 348 | "tr", "oldModelViewProj", "modelViewProj"};
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[3104] | 349 | sCgGiProgram->AddParameters(giParams, 0, 13);
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[3034] | 350 |
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[3104] | 351 | string toneParams[] = {"colors", "imageKey", "whiteLum", "middleGrey"};
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| 352 | sCgToneProgram->AddParameters(toneParams, 0, 4);
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[3034] | 353 |
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| 354 |
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[3104] | 355 | ////////////////
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| 356 |
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| 357 | string deferredShadowParams[] =
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| 358 | {"colors", "normals", "shadowMap", "noiseTex", "shadowMatrix",
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| 359 | "sampleWidth", "lightDir", "eyePos", "samples", "weights"};
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[3035] | 360 |
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[3104] | 361 | sCgDeferredShadowProgram->AddParameters(deferredShadowParams, 0, 10);
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| 362 |
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| 363 | ////////////////
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[3034] | 364 |
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[3104] | 365 | string combineIllumParams[] = {"colorsTex", "ssaoTex", "illumTex"};
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| 366 | sCgCombineIllumProgram->AddParameters(combineIllumParams, 0, 3);
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[3035] | 367 |
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[3104] | 368 | ////////////////
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[3035] | 369 |
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[3104] | 370 | string combineSsaoParams[] = {"colorsTex", "ssaoTex", "filterOffs", "filterWeights"};
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| 371 | sCgCombineSsaoProgram->AddParameters(combineSsaoParams, 0, 4);
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[3035] | 372 |
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[3104] | 373 | //////////////
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[3036] | 374 |
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[3104] | 375 | string deferredParams[] = {"colors", "normals", "lightDir"};
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| 376 | sCgDeferredProgram->AddParameters(deferredParams, 0, 3);
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| 377 |
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| 378 | ///////////////////
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| 379 |
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| 380 | string aaParams[] = {"colors", "normals"};
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| 381 | sCgAntiAliasingProgram->AddParameters(aaParams, 0, 2);
|
---|
| 382 |
|
---|
| 383 | /////////////////////
|
---|
| 384 |
|
---|
| 385 | string downSampleParams[] = {"colors", "downSampleOffs"};
|
---|
| 386 | sCgDownSampleProgram->AddParameters(downSampleParams, 0, 2);
|
---|
| 387 |
|
---|
| 388 | ////////////
|
---|
| 389 |
|
---|
| 390 | sCgLogLumProgram->AddParameter("colors", 0);
|
---|
| 391 |
|
---|
| 392 |
|
---|
| 393 |
|
---|
| 394 | ///////////
|
---|
| 395 |
|
---|
| 396 |
|
---|
[3103] | 397 | PoissonDiscSampleGenerator2 poisson(NUM_SSAO_FILTERSAMPLES, 1.0f);
|
---|
| 398 | poisson.Generate((float *)ssaoFilterOffsets);
|
---|
[3036] | 399 |
|
---|
[3103] | 400 | //const float filterWidth = 10.0f;
|
---|
| 401 | const float filterWidth = 5.0f;
|
---|
[3105] | 402 | //const float filterWidth = 60.0f;
|
---|
[3103] | 403 |
|
---|
| 404 | //const float xoffs = filterWidth / mDownSampleFbo->GetWidth();
|
---|
| 405 | //const float yoffs = filterWidth / mDownSampleFbo->GetHeight();
|
---|
[3105] | 406 | const float xoffs = (float)filterWidth / mWidth;
|
---|
| 407 | const float yoffs = (float)filterWidth / mHeight;
|
---|
[3103] | 408 |
|
---|
| 409 | for (int i = 0; i < NUM_SSAO_FILTERSAMPLES; ++ i)
|
---|
| 410 | {
|
---|
| 411 | float x = ssaoFilterOffsets[2 * i + 0];
|
---|
| 412 | float y = ssaoFilterOffsets[2 * i + 1];
|
---|
| 413 |
|
---|
| 414 | ssaoFilterOffsets[2 * i + 0] *= xoffs;
|
---|
| 415 | ssaoFilterOffsets[2 * i + 1] *= yoffs;
|
---|
| 416 |
|
---|
| 417 | ssaoFilterWeights[i] = GaussianDistribution(x, y, 1.0f);
|
---|
| 418 | }
|
---|
| 419 |
|
---|
| 420 |
|
---|
[3026] | 421 | float filterWeights[NUM_PCF_TABS];
|
---|
[3103] | 422 | PoissonDiscSampleGenerator2 poisson2(NUM_PCF_TABS, 1.0f);
|
---|
| 423 | poisson2.Generate((float *)pcfSamples);
|
---|
[2990] | 424 |
|
---|
[3026] | 425 | for (int i = 0; i < NUM_PCF_TABS; ++ i)
|
---|
[2880] | 426 | {
|
---|
[3026] | 427 | filterWeights[i] = GaussianDistribution(pcfSamples[i].x, pcfSamples[i].y, 1.0f);
|
---|
[2880] | 428 | }
|
---|
| 429 |
|
---|
[3035] | 430 | sCgDeferredShadowProgram->SetArray2f(8, (float *)pcfSamples, NUM_PCF_TABS);
|
---|
| 431 | sCgDeferredShadowProgram->SetArray1f(9, (float *)filterWeights, NUM_PCF_TABS);
|
---|
[2880] | 432 |
|
---|
[2859] | 433 | PrintGLerror("init");
|
---|
| 434 | }
|
---|
| 435 |
|
---|
| 436 |
|
---|
[2896] | 437 | void DeferredRenderer::Render(FrameBufferObject *fbo,
|
---|
[2901] | 438 | float tempCohFactor,
|
---|
[2952] | 439 | DirectionalLight *light,
|
---|
[2991] | 440 | bool useToneMapping,
|
---|
| 441 | ShadowMap *shadowMap
|
---|
| 442 | )
|
---|
[2859] | 443 | {
|
---|
[3085] | 444 | InitFrame();
|
---|
| 445 |
|
---|
[2944] | 446 | if (shadowMap)
|
---|
[2952] | 447 | FirstPassShadow(fbo, light, shadowMap);
|
---|
[2895] | 448 | else
|
---|
[2952] | 449 | FirstPass(fbo, light);
|
---|
[2944] | 450 |
|
---|
[3103] | 451 |
|
---|
| 452 | if (mShadingMethod != 0)
|
---|
[2880] | 453 | {
|
---|
[3103] | 454 | // downsample fbo buffers for colors
|
---|
[3006] | 455 | DownSample(fbo, colorBufferIdx, mDownSampleFbo, 0);
|
---|
[3103] | 456 | // normals
|
---|
[3006] | 457 | DownSample(fbo, 1, mDownSampleFbo, 1);
|
---|
[3103] | 458 | }
|
---|
[3006] | 459 |
|
---|
[3103] | 460 | switch (mShadingMethod)
|
---|
| 461 | {
|
---|
| 462 | case SSAO:
|
---|
| 463 |
|
---|
[3085] | 464 | ComputeSsao(fbo, tempCohFactor);
|
---|
[2944] | 465 | CombineSsao(fbo);
|
---|
| 466 | break;
|
---|
| 467 | case GI:
|
---|
[3085] | 468 | ComputeGlobIllum(fbo, tempCohFactor);
|
---|
[2944] | 469 | CombineIllum(fbo);
|
---|
| 470 | break;
|
---|
| 471 | default: // DEFAULT
|
---|
| 472 | // do nothing: standard deferred shading
|
---|
| 473 | break;
|
---|
| 474 | }
|
---|
[2884] | 475 |
|
---|
[2991] | 476 | if (useToneMapping)
|
---|
| 477 | {
|
---|
| 478 | float imageKey, whiteLum, middleGrey;
|
---|
| 479 |
|
---|
| 480 | ComputeToneParameters(fbo, light, imageKey, whiteLum, middleGrey);
|
---|
[3007] | 481 | ToneMap(fbo, imageKey, whiteLum, middleGrey);
|
---|
[2991] | 482 | }
|
---|
| 483 |
|
---|
[2970] | 484 | AntiAliasing(fbo, light);
|
---|
[2867] | 485 |
|
---|
| 486 | glEnable(GL_LIGHTING);
|
---|
| 487 | glDisable(GL_TEXTURE_2D);
|
---|
| 488 |
|
---|
| 489 | glMatrixMode(GL_PROJECTION);
|
---|
| 490 | glPopMatrix();
|
---|
| 491 |
|
---|
| 492 | glMatrixMode(GL_MODELVIEW);
|
---|
| 493 | glPopMatrix();
|
---|
| 494 |
|
---|
[3089] | 495 | // viewport
|
---|
[2867] | 496 | glPopAttrib();
|
---|
| 497 |
|
---|
[3007] | 498 | FrameBufferObject::Release();
|
---|
[3057] | 499 | ShaderManager::GetSingleton()->DisableFragmentProfile();
|
---|
[2859] | 500 | }
|
---|
| 501 |
|
---|
| 502 |
|
---|
[2896] | 503 | void DeferredRenderer::ComputeSsao(FrameBufferObject *fbo,
|
---|
[3087] | 504 | float tempCohFactor)
|
---|
[2859] | 505 | {
|
---|
[3016] | 506 | #if 0
|
---|
[3015] | 507 | GLuint colorsTex = fbo->GetColorBuffer(colorBufferIdx)->GetTexture();
|
---|
| 508 | GLuint normalsTex = fbo->GetColorBuffer(1)->GetTexture();
|
---|
| 509 | #else
|
---|
[3006] | 510 | GLuint colorsTex = mDownSampleFbo->GetColorBuffer(0)->GetTexture();
|
---|
[3009] | 511 | GLuint normalsTex = mDownSampleFbo->GetColorBuffer(1)->GetTexture();
|
---|
[3015] | 512 | #endif
|
---|
| 513 |
|
---|
[3087] | 514 | // flip flop between illumination buffers
|
---|
[3019] | 515 | GLuint oldTex = mIllumFbo->GetColorBuffer(2 - mIllumFboIndex)->GetTexture();
|
---|
[2993] | 516 |
|
---|
[3006] | 517 | glPushAttrib(GL_VIEWPORT_BIT);
|
---|
[3019] | 518 | glViewport(0, 0, mIllumFbo->GetWidth(), mIllumFbo->GetHeight());
|
---|
[3006] | 519 |
|
---|
[2861] | 520 | // read the second buffer, write to the first buffer
|
---|
[3019] | 521 | mIllumFbo->Bind();
|
---|
| 522 | glDrawBuffers(1, mrt + mIllumFboIndex);
|
---|
[2868] | 523 |
|
---|
[3095] | 524 | int i = 0;
|
---|
[3034] | 525 |
|
---|
[3095] | 526 | sCgSsaoProgram->SetTexture(i ++, colorsTex);
|
---|
| 527 | sCgSsaoProgram->SetTexture(i ++, normalsTex);
|
---|
| 528 | sCgSsaoProgram->SetTexture(i ++, oldTex);
|
---|
| 529 | sCgSsaoProgram->SetTexture(i ++, noiseTex);
|
---|
| 530 |
|
---|
| 531 | sCgSsaoProgram->SetValue1f(i ++, (mUseTemporalCoherence && !mRegenerateSamples) ? tempCohFactor : 0);
|
---|
[3035] | 532 |
|
---|
[2895] | 533 | if (mUseTemporalCoherence || mRegenerateSamples)
|
---|
[2875] | 534 | {
|
---|
[2895] | 535 | mRegenerateSamples = false;
|
---|
[2859] | 536 |
|
---|
[2875] | 537 | // q: should we generate new samples or only rotate the old ones?
|
---|
| 538 | // in the first case, the sample patterns look nicer, but the kernel
|
---|
| 539 | // needs longer to converge
|
---|
[2895] | 540 | GenerateSamples(mSamplingMethod);
|
---|
[3095] | 541 | sCgSsaoProgram->SetArray2f(i, (float *)samples2, NUM_SAMPLES);
|
---|
[2875] | 542 | }
|
---|
[3085] | 543 |
|
---|
[3095] | 544 | ++ i;
|
---|
[2859] | 545 |
|
---|
[3095] | 546 | for (int j = 0; j < 4; ++ j, ++ i)
|
---|
| 547 | sCgSsaoProgram->SetValue3f(i, mCornersView[j].x, mCornersView[j].y, mCornersView[j].z);
|
---|
[2987] | 548 |
|
---|
[3095] | 549 | sCgSsaoProgram->SetMatrix(i ++, mProjViewMatrix);
|
---|
| 550 | sCgSsaoProgram->SetMatrix(i ++, mOldProjViewMatrix);
|
---|
[3062] | 551 |
|
---|
[3105] | 552 | //Vector3 de = mOldEyePos - mEyePos;
|
---|
| 553 | Vector3 de;
|
---|
| 554 | de.x = mOldEyePos.x - mEyePos.x;
|
---|
| 555 | de.y = mOldEyePos.y - mEyePos.y;
|
---|
| 556 | de.z = mOldEyePos.z - mEyePos.z;
|
---|
[3095] | 557 | //Vector3 de = mEyePos - mOldEyePos;
|
---|
[3035] | 558 |
|
---|
[3095] | 559 | sCgSsaoProgram->SetValue3f(i ++, de.x, de.y, de.z);
|
---|
[3093] | 560 |
|
---|
[3095] | 561 | for (int j = 0; j < 4; ++ j, ++ i)
|
---|
| 562 | sCgSsaoProgram->SetValue3f(i, mOldCornersView[j].x, mOldCornersView[j].y, mOldCornersView[j].z);
|
---|
[3085] | 563 |
|
---|
[3110] | 564 | GLuint attribsTex = fbo->GetColorBuffer(2)->GetTexture();
|
---|
| 565 | sCgSsaoProgram->SetTexture(i ++, attribsTex);
|
---|
| 566 |
|
---|
[3112] | 567 | float trafos[32];
|
---|
| 568 | for (int i = 0; i < 16; ++ i)
|
---|
| 569 | trafos[i] = ((const float *)invTrafo.x)[i];
|
---|
| 570 |
|
---|
| 571 | static Matrix4x4 identity = IdentityMatrix();
|
---|
| 572 |
|
---|
| 573 | for (int i = 0; i < 16; ++ i)
|
---|
| 574 | trafos[i+16] = ((const float *)identity.x)[i];
|
---|
| 575 |
|
---|
[3113] | 576 | //sCgSsaoProgram->SetMatrixArray(i ++, trafos, 2);
|
---|
[3111] | 577 | //sCgSsaoProgram->SetMatrix(i ++, IdentityMatrix());
|
---|
[3110] | 578 |
|
---|
[3026] | 579 | DrawQuad(sCgSsaoProgram);
|
---|
[2987] | 580 |
|
---|
[3006] | 581 | glPopAttrib();
|
---|
[2859] | 582 |
|
---|
| 583 | PrintGLerror("ssao first pass");
|
---|
| 584 | }
|
---|
| 585 |
|
---|
| 586 |
|
---|
[2865] | 587 | static void SetVertex(float x, float y, float x_offs, float y_offs)
|
---|
| 588 | {
|
---|
| 589 | glMultiTexCoord2fARB(GL_TEXTURE0_ARB, x, y); // center
|
---|
| 590 | glMultiTexCoord2fARB(GL_TEXTURE1_ARB, x - x_offs, y + y_offs); // left top
|
---|
| 591 | glMultiTexCoord2fARB(GL_TEXTURE2_ARB, x + x_offs, y - y_offs); // right bottom
|
---|
| 592 | glMultiTexCoord2fARB(GL_TEXTURE3_ARB, x + x_offs, y + y_offs); // right top
|
---|
| 593 | glMultiTexCoord2fARB(GL_TEXTURE4_ARB, x - x_offs, y - y_offs); // left bottom
|
---|
| 594 |
|
---|
| 595 | glMultiTexCoord4fARB(GL_TEXTURE5_ARB, x - x_offs, y, x + x_offs, y); // left right
|
---|
| 596 | glMultiTexCoord4fARB(GL_TEXTURE6_ARB, x, y + y_offs, x, y - y_offs); // top bottom
|
---|
| 597 |
|
---|
[3089] | 598 | //glVertex3f(x - 0.5f, y - 0.5f, -0.5f);
|
---|
| 599 | glVertex2f(x, y);
|
---|
[2865] | 600 | }
|
---|
| 601 |
|
---|
| 602 |
|
---|
[2970] | 603 | void DeferredRenderer::AntiAliasing(FrameBufferObject *fbo, DirectionalLight *light)
|
---|
[2865] | 604 | {
|
---|
[3007] | 605 | FrameBufferObject::Release();
|
---|
| 606 |
|
---|
[2968] | 607 | ColorBufferObject *colorBuffer = fbo->GetColorBuffer(colorBufferIdx);
|
---|
[2967] | 608 |
|
---|
[2968] | 609 | GLuint colorsTex = colorBuffer->GetTexture();
|
---|
[2865] | 610 | GLuint normalsTex = fbo->GetColorBuffer(2)->GetTexture();
|
---|
[3007] | 611 |
|
---|
[3034] | 612 | sCgAntiAliasingProgram->SetTexture(0, colorsTex);
|
---|
| 613 | sCgAntiAliasingProgram->SetTexture(1, normalsTex);
|
---|
[2865] | 614 |
|
---|
[3026] | 615 | sCgAntiAliasingProgram->Bind();
|
---|
[2868] | 616 |
|
---|
[2865] | 617 | glBegin(GL_QUADS);
|
---|
| 618 |
|
---|
| 619 | // the neighbouring texels
|
---|
| 620 | float x_offs = 1.0f / mWidth;
|
---|
| 621 | float y_offs = 1.0f / mHeight;
|
---|
| 622 |
|
---|
| 623 | SetVertex(0, 0, x_offs, y_offs);
|
---|
| 624 | SetVertex(1, 0, x_offs, y_offs);
|
---|
| 625 | SetVertex(1, 1, x_offs, y_offs);
|
---|
| 626 | SetVertex(0, 1, x_offs, y_offs);
|
---|
| 627 |
|
---|
| 628 | glEnd();
|
---|
| 629 |
|
---|
[2867] | 630 | PrintGLerror("antialiasing");
|
---|
[2865] | 631 | }
|
---|
| 632 |
|
---|
| 633 |
|
---|
[2952] | 634 | void DeferredRenderer::FirstPass(FrameBufferObject *fbo, DirectionalLight *light)
|
---|
[2868] | 635 | {
|
---|
[2973] | 636 | GLuint colorsTex = fbo->GetColorBuffer(colorBufferIdx)->GetTexture();
|
---|
[3009] | 637 | GLuint normalsTex = fbo->GetColorBuffer(1)->GetTexture();
|
---|
[2868] | 638 |
|
---|
[2879] | 639 | fbo->Bind();
|
---|
[2868] | 640 |
|
---|
[2973] | 641 | colorBufferIdx = 3 - colorBufferIdx;
|
---|
[2899] | 642 | glDrawBuffers(1, mrt + colorBufferIdx);
|
---|
[2868] | 643 |
|
---|
[3026] | 644 | const Vector3 lightDir = -light->GetDirection();
|
---|
[2868] | 645 |
|
---|
[3034] | 646 | sCgDeferredProgram->SetTexture(0, colorsTex);
|
---|
| 647 | sCgDeferredProgram->SetTexture(1, normalsTex);
|
---|
| 648 | sCgDeferredProgram->SetValue3f(2, lightDir.x, lightDir.y, lightDir.z);
|
---|
[2868] | 649 |
|
---|
[3026] | 650 | DrawQuad(sCgDeferredProgram);
|
---|
[2952] | 651 |
|
---|
[2868] | 652 | PrintGLerror("deferred shading");
|
---|
| 653 | }
|
---|
| 654 |
|
---|
[2869] | 655 |
|
---|
[2896] | 656 | void DeferredRenderer::ComputeGlobIllum(FrameBufferObject *fbo,
|
---|
[3085] | 657 | float tempCohFactor)
|
---|
[2869] | 658 | {
|
---|
[3016] | 659 | #if 0
|
---|
| 660 | GLuint colorsTex = fbo->GetColorBuffer(colorBufferIdx)->GetTexture();
|
---|
| 661 | GLuint normalsTex = fbo->GetColorBuffer(1)->GetTexture();
|
---|
| 662 | #else
|
---|
[3003] | 663 | GLuint colorsTex = mDownSampleFbo->GetColorBuffer(0)->GetTexture();
|
---|
[3009] | 664 | GLuint normalsTex = mDownSampleFbo->GetColorBuffer(1)->GetTexture();
|
---|
[3016] | 665 | #endif
|
---|
[2869] | 666 |
|
---|
[3006] | 667 | glPushAttrib(GL_VIEWPORT_BIT);
|
---|
[3019] | 668 | glViewport(0, 0, mIllumFbo->GetWidth(), mIllumFbo->GetHeight());
|
---|
[2869] | 669 |
|
---|
[2873] | 670 | // read the second buffer, write to the first buffer
|
---|
[3019] | 671 | mIllumFbo->Bind();
|
---|
[2873] | 672 |
|
---|
[3019] | 673 | glDrawBuffers(2, mrt + mIllumFboIndex);
|
---|
[2873] | 674 |
|
---|
[3019] | 675 | GLuint oldSsaoTex = mIllumFbo->GetColorBuffer(2 - mIllumFboIndex)->GetTexture();
|
---|
| 676 | GLuint oldIllumTex = mIllumFbo->GetColorBuffer(2 - mIllumFboIndex + 1)->GetTexture();
|
---|
[3006] | 677 |
|
---|
[2869] | 678 |
|
---|
[3034] | 679 | sCgGiProgram->SetTexture(0, colorsTex);
|
---|
| 680 | sCgGiProgram->SetTexture(1, normalsTex);
|
---|
| 681 | sCgGiProgram->SetTexture(2, noiseTex);
|
---|
| 682 | sCgGiProgram->SetTexture(3, oldSsaoTex);
|
---|
| 683 | sCgGiProgram->SetTexture(4, oldIllumTex);
|
---|
[2869] | 684 |
|
---|
[3094] | 685 | sCgGiProgram->SetValue1f(5,
|
---|
[3026] | 686 | (mUseTemporalCoherence && !mRegenerateSamples) ? tempCohFactor : 0);
|
---|
[2869] | 687 |
|
---|
[2895] | 688 | if (mUseTemporalCoherence || mRegenerateSamples)
|
---|
[2875] | 689 | {
|
---|
[2895] | 690 | mRegenerateSamples = false;
|
---|
[2873] | 691 |
|
---|
[2875] | 692 | // q: should we generate new samples or only rotate the old ones?
|
---|
| 693 | // in the first case, the sample patterns look nicer, but the kernel
|
---|
| 694 | // needs longer to converge
|
---|
[2895] | 695 | GenerateSamples(mSamplingMethod);
|
---|
[2903] | 696 |
|
---|
[3094] | 697 | sCgGiProgram->SetArray2f(6, (float *)samples2, NUM_SAMPLES);
|
---|
[2875] | 698 | }
|
---|
| 699 |
|
---|
[3085] | 700 | Vector3 bl = mCornersView[0];
|
---|
| 701 | Vector3 br = mCornersView[1];
|
---|
| 702 | Vector3 tl = mCornersView[2];
|
---|
| 703 | Vector3 tr = mCornersView[3];
|
---|
[2895] | 704 |
|
---|
[3094] | 705 | sCgGiProgram->SetValue3f(7, bl.x, bl.y, bl.z);
|
---|
| 706 | sCgGiProgram->SetValue3f(8, br.x, br.y, br.z);
|
---|
| 707 | sCgGiProgram->SetValue3f(9, tl.x, tl.y, tl.z);
|
---|
| 708 | sCgGiProgram->SetValue3f(10, tr.x, tr.y, tr.z);
|
---|
[2873] | 709 |
|
---|
[3094] | 710 | sCgGiProgram->SetMatrix(11, mOldProjViewMatrix);
|
---|
| 711 | sCgGiProgram->SetMatrix(12, mProjViewMatrix);
|
---|
[3035] | 712 |
|
---|
| 713 |
|
---|
[3026] | 714 | DrawQuad(sCgGiProgram);
|
---|
[2990] | 715 |
|
---|
[3006] | 716 | glPopAttrib();
|
---|
| 717 |
|
---|
[2873] | 718 | PrintGLerror("globillum first pass");
|
---|
[2869] | 719 | }
|
---|
| 720 |
|
---|
| 721 |
|
---|
[2896] | 722 | void DeferredRenderer::CombineIllum(FrameBufferObject *fbo)
|
---|
[2880] | 723 | {
|
---|
[2973] | 724 | GLuint colorsTex = fbo->GetColorBuffer(colorBufferIdx)->GetTexture();
|
---|
[2884] | 725 |
|
---|
[3019] | 726 | GLuint ssaoTex = mIllumFbo->GetColorBuffer(mIllumFboIndex)->GetTexture();
|
---|
| 727 | GLuint illumTex = mIllumFbo->GetColorBuffer(mIllumFboIndex + 1)->GetTexture();
|
---|
[2880] | 728 |
|
---|
[2891] | 729 |
|
---|
[2880] | 730 | fbo->Bind();
|
---|
| 731 |
|
---|
[2884] | 732 | // overwrite old color texture
|
---|
[2973] | 733 | colorBufferIdx = 3 - colorBufferIdx;
|
---|
| 734 |
|
---|
[2899] | 735 | glDrawBuffers(1, mrt + colorBufferIdx);
|
---|
[2880] | 736 |
|
---|
[3036] | 737 | sCgCombineIllumProgram->SetTexture(0, colorsTex);
|
---|
| 738 | sCgCombineIllumProgram->SetTexture(1, ssaoTex);
|
---|
| 739 | sCgCombineIllumProgram->SetTexture(2, illumTex);
|
---|
[2880] | 740 |
|
---|
[3026] | 741 | DrawQuad(sCgCombineIllumProgram);
|
---|
[2880] | 742 |
|
---|
| 743 | PrintGLerror("combine");
|
---|
| 744 | }
|
---|
| 745 |
|
---|
| 746 |
|
---|
[2896] | 747 | void DeferredRenderer::CombineSsao(FrameBufferObject *fbo)
|
---|
[2880] | 748 | {
|
---|
[2973] | 749 | fbo->Bind();
|
---|
| 750 |
|
---|
| 751 | GLuint colorsTex = fbo->GetColorBuffer(colorBufferIdx)->GetTexture();
|
---|
[3103] | 752 | GLuint normalsTex = fbo->GetColorBuffer(1)->GetTexture();
|
---|
[3019] | 753 | GLuint ssaoTex = mIllumFbo->GetColorBuffer(mIllumFboIndex)->GetTexture();
|
---|
[2880] | 754 |
|
---|
[2895] | 755 | // overwrite old color texture
|
---|
[2973] | 756 | colorBufferIdx = 3 - colorBufferIdx;
|
---|
[2899] | 757 | glDrawBuffers(1, mrt + colorBufferIdx);
|
---|
[2880] | 758 |
|
---|
[3104] | 759 | int i = 0;
|
---|
| 760 | sCgCombineSsaoProgram->SetTexture(i ++, colorsTex);
|
---|
| 761 | //sCgCombineSsaoProgram->SetTexture(i ++, normalsTex);
|
---|
| 762 | sCgCombineSsaoProgram->SetTexture(i ++, ssaoTex);
|
---|
[3017] | 763 |
|
---|
[3104] | 764 | sCgCombineSsaoProgram->SetArray2f(i ++, (float *)ssaoFilterOffsets, NUM_SSAO_FILTERSAMPLES);
|
---|
| 765 | sCgCombineSsaoProgram->SetArray1f(i ++, (float *)ssaoFilterWeights, NUM_SSAO_FILTERSAMPLES);
|
---|
[2880] | 766 |
|
---|
[3026] | 767 | DrawQuad(sCgCombineSsaoProgram);
|
---|
[2974] | 768 |
|
---|
[2880] | 769 | PrintGLerror("combine ssao");
|
---|
| 770 | }
|
---|
| 771 |
|
---|
| 772 |
|
---|
[2952] | 773 | void DeferredRenderer::FirstPassShadow(FrameBufferObject *fbo,
|
---|
| 774 | DirectionalLight *light,
|
---|
| 775 | ShadowMap *shadowMap)
|
---|
[2895] | 776 | {
|
---|
[2973] | 777 | fbo->Bind();
|
---|
[2880] | 778 |
|
---|
[2973] | 779 | GLuint colorsTex = fbo->GetColorBuffer(colorBufferIdx)->GetTexture();
|
---|
[3009] | 780 | GLuint normalsTex = fbo->GetColorBuffer(1)->GetTexture();
|
---|
[2973] | 781 |
|
---|
[2928] | 782 | GLuint shadowTex = shadowMap->GetDepthTexture();
|
---|
[2895] | 783 |
|
---|
| 784 | Matrix4x4 shadowMatrix;
|
---|
| 785 | shadowMap->GetTextureMatrix(shadowMatrix);
|
---|
| 786 |
|
---|
[2973] | 787 | colorBufferIdx = 3 - colorBufferIdx;
|
---|
[2899] | 788 | glDrawBuffers(1, mrt + colorBufferIdx);
|
---|
[2895] | 789 |
|
---|
[3035] | 790 | sCgDeferredShadowProgram->SetTexture(0, colorsTex);
|
---|
| 791 | sCgDeferredShadowProgram->SetTexture(1, normalsTex);
|
---|
| 792 | sCgDeferredShadowProgram->SetTexture(2, shadowTex);
|
---|
| 793 | sCgDeferredShadowProgram->SetTexture(3, noiseTex);
|
---|
| 794 | sCgDeferredShadowProgram->SetMatrix(4, shadowMatrix);
|
---|
| 795 | sCgDeferredShadowProgram->SetValue1f(5, 2.0f / shadowMap->GetSize());
|
---|
[3027] | 796 |
|
---|
[3026] | 797 | const Vector3 lightDir = -light->GetDirection();
|
---|
[3035] | 798 | sCgDeferredShadowProgram->SetValue3f(6, lightDir.x, lightDir.y, lightDir.z);
|
---|
[3085] | 799 | sCgDeferredShadowProgram->SetValue3f(7, mEyePos.x, mEyePos.y, mEyePos.z);
|
---|
[2952] | 800 |
|
---|
[3026] | 801 | DrawQuad(sCgDeferredShadowProgram);
|
---|
[2895] | 802 |
|
---|
| 803 | PrintGLerror("deferred shading + shadows");
|
---|
| 804 | }
|
---|
| 805 |
|
---|
| 806 |
|
---|
[2896] | 807 | void DeferredRenderer::SetSamplingMethod(SAMPLING_METHOD s)
|
---|
[2895] | 808 | {
|
---|
| 809 | if (s != mSamplingMethod)
|
---|
| 810 | {
|
---|
| 811 | mSamplingMethod = s;
|
---|
| 812 | mRegenerateSamples = true;
|
---|
| 813 | }
|
---|
| 814 | }
|
---|
| 815 |
|
---|
[2897] | 816 |
|
---|
| 817 | void DeferredRenderer::SetShadingMethod(SHADING_METHOD s)
|
---|
| 818 | {
|
---|
| 819 | if (s != mShadingMethod)
|
---|
| 820 | {
|
---|
| 821 | mShadingMethod = s;
|
---|
| 822 | mRegenerateSamples = true;
|
---|
| 823 | }
|
---|
| 824 | }
|
---|
| 825 |
|
---|
[2965] | 826 |
|
---|
[2973] | 827 | void DeferredRenderer::ComputeToneParameters(FrameBufferObject *fbo,
|
---|
| 828 | DirectionalLight *light,
|
---|
| 829 | float &imageKey,
|
---|
| 830 | float &whiteLum,
|
---|
| 831 | float &middleGrey)
|
---|
[2972] | 832 | {
|
---|
[2975] | 833 | // hack: estimate value where sky burns out
|
---|
[3010] | 834 | whiteLum = log(WHITE_LUMINANCE);
|
---|
[2973] | 835 |
|
---|
[2975] | 836 | ////////////////////
|
---|
| 837 | //-- linear interpolate brightness key depending on the current sun position
|
---|
[2973] | 838 |
|
---|
| 839 | const float minKey = 0.09f;
|
---|
[3020] | 840 | const float maxKey = 0.36f;
|
---|
[2973] | 841 |
|
---|
| 842 | const float lightIntensity = DotProd(-light->GetDirection(), Vector3::UNIT_Z());
|
---|
| 843 | middleGrey = lightIntensity * maxKey + (1.0f - lightIntensity) * minKey;
|
---|
[2991] | 844 |
|
---|
[2993] | 845 |
|
---|
[2991] | 846 | //////////
|
---|
| 847 | //-- compute avg loglum
|
---|
| 848 |
|
---|
| 849 | ColorBufferObject *colorBuffer = fbo->GetColorBuffer(colorBufferIdx);
|
---|
[2992] | 850 | GLuint colorsTex = colorBuffer->GetTexture();
|
---|
[2991] | 851 |
|
---|
| 852 | fbo->Bind();
|
---|
| 853 |
|
---|
| 854 | colorBufferIdx = 3 - colorBufferIdx;
|
---|
| 855 | glDrawBuffers(1, mrt + colorBufferIdx);
|
---|
| 856 |
|
---|
[3035] | 857 | sCgLogLumProgram->SetTexture(0, colorsTex);
|
---|
[3026] | 858 | DrawQuad(sCgLogLumProgram);
|
---|
[2991] | 859 |
|
---|
| 860 | PrintGLerror("ToneMapParams");
|
---|
| 861 |
|
---|
| 862 |
|
---|
| 863 | ///////////////////
|
---|
| 864 | //-- compute avg loglum in scene using mipmapping
|
---|
| 865 |
|
---|
[3008] | 866 | glBindTexture(GL_TEXTURE_2D, fbo->GetColorBuffer(colorBufferIdx)->GetTexture());
|
---|
| 867 | glGenerateMipmapEXT(GL_TEXTURE_2D);
|
---|
[2972] | 868 | }
|
---|
| 869 |
|
---|
| 870 |
|
---|
[3003] | 871 | static void ExportData(float *data, int w, int h)
|
---|
| 872 | {
|
---|
| 873 | startil();
|
---|
| 874 |
|
---|
| 875 | cout << "w: " << w << " h: " << h << endl;
|
---|
| 876 | ILstring filename = ILstring("downsample2.jpg");
|
---|
| 877 | ilRegisterType(IL_FLOAT);
|
---|
| 878 |
|
---|
| 879 | const int depth = 1;
|
---|
| 880 | const int bpp = 4;
|
---|
| 881 |
|
---|
| 882 | if (!ilTexImage(w, h, depth, bpp, IL_RGBA, IL_FLOAT, data))
|
---|
| 883 | {
|
---|
| 884 | cerr << "IL error " << ilGetError() << endl;
|
---|
| 885 | stopil();
|
---|
| 886 | return;
|
---|
| 887 | }
|
---|
| 888 |
|
---|
| 889 | if (!ilSaveImage(filename))
|
---|
| 890 | {
|
---|
| 891 | cerr << "TGA write error " << ilGetError() << endl;
|
---|
| 892 | }
|
---|
| 893 |
|
---|
| 894 | stopil();
|
---|
| 895 | }
|
---|
| 896 |
|
---|
| 897 |
|
---|
[3103] | 898 | void DeferredRenderer::DownSample(FrameBufferObject *fbo,
|
---|
| 899 | int bufferIdx,
|
---|
[3006] | 900 | FrameBufferObject *downSampleFbo,
|
---|
| 901 | int downSampleBufferIdx)
|
---|
[2972] | 902 | {
|
---|
[3006] | 903 | ColorBufferObject *colorBuffer = fbo->GetColorBuffer(bufferIdx);
|
---|
[2994] | 904 | GLuint colorsTex = colorBuffer->GetTexture();
|
---|
[3006] | 905 |
|
---|
| 906 | glPushAttrib(GL_VIEWPORT_BIT);
|
---|
| 907 | glViewport(0, 0, downSampleFbo->GetWidth(), downSampleFbo->GetHeight());
|
---|
[2972] | 908 |
|
---|
[3035] | 909 | sCgDownSampleProgram->SetTexture(0, colorsTex);
|
---|
[2994] | 910 |
|
---|
[3017] | 911 | float downSampleOffsets[NUM_DOWNSAMPLES * 2];
|
---|
| 912 | ComputeSampleOffsets(downSampleOffsets, fbo->GetWidth(), fbo->GetHeight());
|
---|
| 913 |
|
---|
[3035] | 914 | sCgDownSampleProgram->SetArray2f(1, (float *)downSampleOffsets, NUM_DOWNSAMPLES);
|
---|
[3010] | 915 |
|
---|
[2994] | 916 | mDownSampleFbo->Bind();
|
---|
[3006] | 917 | glDrawBuffers(1, mrt + downSampleBufferIdx);
|
---|
[2994] | 918 |
|
---|
[3026] | 919 | DrawQuad(sCgDownSampleProgram);
|
---|
[3005] | 920 |
|
---|
[3006] | 921 | glPopAttrib();
|
---|
| 922 |
|
---|
[3005] | 923 | PrintGLerror("downsample");
|
---|
[2972] | 924 | }
|
---|
| 925 |
|
---|
| 926 |
|
---|
[2973] | 927 | void DeferredRenderer::ToneMap(FrameBufferObject *fbo,
|
---|
| 928 | float imageKey,
|
---|
| 929 | float whiteLum,
|
---|
| 930 | float middleGrey)
|
---|
[2972] | 931 | {
|
---|
| 932 | ColorBufferObject *colorBuffer = fbo->GetColorBuffer(colorBufferIdx);
|
---|
[2994] | 933 | GLuint colorsTex = colorBuffer->GetTexture();
|
---|
[2972] | 934 |
|
---|
[2973] | 935 | fbo->Bind();
|
---|
[3025] | 936 |
|
---|
[2973] | 937 | colorBufferIdx = 3 - colorBufferIdx;
|
---|
| 938 | glDrawBuffers(1, mrt + colorBufferIdx);
|
---|
[3007] | 939 |
|
---|
[3035] | 940 | sCgToneProgram->SetTexture(0, colorsTex);
|
---|
| 941 | sCgToneProgram->SetValue1f(1, imageKey);
|
---|
| 942 | sCgToneProgram->SetValue1f(2, whiteLum);
|
---|
| 943 | sCgToneProgram->SetValue1f(3, middleGrey);
|
---|
[3007] | 944 |
|
---|
[3026] | 945 | DrawQuad(sCgToneProgram);
|
---|
[2972] | 946 |
|
---|
[2973] | 947 | PrintGLerror("ToneMap");
|
---|
[2972] | 948 | }
|
---|
| 949 |
|
---|
| 950 |
|
---|
[3081] | 951 | /*
|
---|
| 952 | void DeferredRenderer::BackProject(FrameBufferObject *fbo)
|
---|
| 953 | {
|
---|
| 954 | // back project new frame into old one and check
|
---|
| 955 | // if pixel still valid. store this property with ssao texture or even
|
---|
| 956 | // betteer with color / depth texture. This way
|
---|
| 957 | // we can sample this property together with the color / depth
|
---|
| 958 | // values and we do not require additional texture lookups
|
---|
| 959 | fbo->Bind();
|
---|
| 960 |
|
---|
| 961 | GLuint colorsTex = fbo->GetColorBuffer(colorBufferIdx)->GetTexture();
|
---|
| 962 | //GLuint ssaoTex = mIllumFbo->GetColorBuffer(mIllumFboIndex)->GetTexture();
|
---|
| 963 |
|
---|
| 964 | // overwrite old color texture
|
---|
| 965 | //colorBufferIdx = 3 - colorBufferIdx;
|
---|
| 966 | //glDrawBuffers(1, mrt + colorBufferIdx);
|
---|
| 967 | //glDrawBuffers(1, mrt + colorBufferIdx);
|
---|
| 968 |
|
---|
| 969 | sCgCombineSsaoProgram->SetTexture(0, colorsTex);
|
---|
| 970 | //sCgCombineSsaoProgram->SetTexture(1, ssaoTex);
|
---|
| 971 |
|
---|
| 972 | DrawQuad(sCgBackProjectProgram);
|
---|
| 973 |
|
---|
| 974 | PrintGLerror("combine ssao");
|
---|
| 975 | }
|
---|
| 976 | */
|
---|
| 977 |
|
---|
| 978 |
|
---|
[3085] | 979 | void DeferredRenderer::InitFrame()
|
---|
| 980 | {
|
---|
[3095] | 981 | for (int i = 0; i < 4; ++ i)
|
---|
| 982 | mOldCornersView[i] = mCornersView[i];
|
---|
| 983 |
|
---|
[3085] | 984 | mOldProjViewMatrix = mProjViewMatrix;
|
---|
[3095] | 985 | mOldEyePos = mEyePos;
|
---|
[3106] | 986 | mEyePos = mCamera->GetPosition();
|
---|
[3081] | 987 |
|
---|
[3104] | 988 | // hack: temporarily change far to improve precision
|
---|
| 989 | const float oldFar = mCamera->GetFar();
|
---|
[3106] | 990 | const float oldNear = mCamera->GetNear();
|
---|
| 991 | //mCamera->SetFar(1e3f);
|
---|
| 992 | //mCamera->SetNear(3.0f);
|
---|
[3104] | 993 | //mCamera->SetFar(1e2f);
|
---|
| 994 |
|
---|
[3106] | 995 | Matrix4x4 matViewing, matProjection;
|
---|
| 996 | /*
|
---|
| 997 | mCamera->SetPosition(mOldEyePos - mEyePos);
|
---|
[3104] | 998 |
|
---|
[3106] | 999 | mCamera->GetModelViewMatrix(matViewing);
|
---|
| 1000 | mCamera->GetProjectionMatrix(matProjection);
|
---|
| 1001 |
|
---|
| 1002 | mOldProjViewMatrix = matViewing * matProjection;
|
---|
| 1003 | mCamera->SetPosition(mEyePos);*/
|
---|
| 1004 |
|
---|
| 1005 | ///////////////////
|
---|
| 1006 |
|
---|
| 1007 |
|
---|
[3093] | 1008 | mCamera->GetViewOrientationMatrix(matViewing);
|
---|
[3085] | 1009 | mCamera->GetProjectionMatrix(matProjection);
|
---|
| 1010 |
|
---|
| 1011 | mProjViewMatrix = matViewing * matProjection;
|
---|
[3095] | 1012 | ComputeViewVectors(mCamera, mCornersView[0], mCornersView[1], mCornersView[2], mCornersView[3]);
|
---|
[3106] | 1013 |
|
---|
[3085] | 1014 |
|
---|
[3095] | 1015 | // switch roles of old and new fbo
|
---|
| 1016 | // the algorihm uses two input fbos, where the one
|
---|
| 1017 | // contais the color buffer from the last frame,
|
---|
| 1018 | // the other one will be written
|
---|
[3085] | 1019 |
|
---|
[3095] | 1020 | mIllumFboIndex = 2 - mIllumFboIndex;
|
---|
| 1021 |
|
---|
| 1022 | // enable fragment shading
|
---|
| 1023 | ShaderManager::GetSingleton()->EnableFragmentProfile();
|
---|
| 1024 |
|
---|
| 1025 | glDisable(GL_ALPHA_TEST);
|
---|
| 1026 | glDisable(GL_TEXTURE_2D);
|
---|
| 1027 | glDisable(GL_LIGHTING);
|
---|
| 1028 | glDisable(GL_BLEND);
|
---|
| 1029 | glDisable(GL_DEPTH_TEST);
|
---|
| 1030 |
|
---|
| 1031 | glPolygonMode(GL_FRONT, GL_FILL);
|
---|
| 1032 |
|
---|
| 1033 | glMatrixMode(GL_PROJECTION);
|
---|
| 1034 | glPushMatrix();
|
---|
| 1035 | glLoadIdentity();
|
---|
| 1036 |
|
---|
| 1037 | gluOrtho2D(0, 1, 0, 1);
|
---|
| 1038 |
|
---|
| 1039 |
|
---|
| 1040 | glMatrixMode(GL_MODELVIEW);
|
---|
| 1041 | glPushMatrix();
|
---|
| 1042 | glLoadIdentity();
|
---|
| 1043 |
|
---|
| 1044 |
|
---|
| 1045 | glPushAttrib(GL_VIEWPORT_BIT);
|
---|
| 1046 | glViewport(0, 0, mWidth, mHeight);
|
---|
[3104] | 1047 | // revert to old far plane
|
---|
| 1048 | mCamera->SetFar(oldFar);
|
---|
[3106] | 1049 | mCamera->SetNear(oldNear);
|
---|
[3085] | 1050 | }
|
---|
| 1051 |
|
---|
| 1052 |
|
---|
[2858] | 1053 | } // namespace
|
---|