[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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[2966] | 11 | #include "ToneMapper.h"
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[2858] | 12 |
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[2859] | 13 |
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[2858] | 14 | using namespace std;
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| 15 |
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| 16 |
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| 17 | namespace CHCDemoEngine
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| 18 | {
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| 19 |
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[2859] | 20 | static CGprogram sCgSsaoProgram = NULL;
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[2873] | 21 | static CGprogram sCgGiProgram = NULL;
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| 22 |
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| 23 | static CGprogram sCgDeferredProgram = NULL;
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[2868] | 24 | static CGprogram sCgAntiAliasingProgram = NULL;
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[2895] | 25 | static CGprogram sCgDeferredShadowProgram = NULL;
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[2859] | 26 |
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[2869] | 27 | static CGparameter sColorsTexCombineParam;
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| 28 | static CGparameter sSsaoTexCombineParam;
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| 29 |
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[2868] | 30 | static CGparameter sColorsTexDeferredParam;
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| 31 | static CGparameter sPositionsTexDeferredParam;
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| 32 | static CGparameter sNormalsTexDeferredParam;
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| 33 |
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[2880] | 34 | static CGprogram sCgCombinedSsaoProgram = NULL;
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| 35 | static CGprogram sCgCombinedIllumProgram = NULL;
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| 36 |
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[2967] | 37 |
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[2944] | 38 | ///////////////////////////////////////
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[2873] | 39 |
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| 40 |
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[2859] | 41 | static CGparameter sColorsTexParam;
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| 42 | static CGparameter sPositionsTexParam;
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| 43 | static CGparameter sNormalsTexParam;
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[2868] | 44 |
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[2859] | 45 | static CGparameter sOldModelViewProjMatrixParam;
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[2900] | 46 | static CGparameter sModelViewProjMatrixParam;
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[2859] | 47 | static CGparameter sMaxDepthParam;
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| 48 | static CGparameter sSamplesParam;
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| 49 | static CGparameter sOldTexParam;
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| 50 | static CGparameter sNoiseTexParam;
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[2897] | 51 | static CGparameter sTemporalCoherenceParam;
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[2859] | 52 |
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[2873] | 53 |
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| 54 | ///////////////////////////////////////
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| 55 |
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| 56 |
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| 57 | static CGparameter sColorsTexGiParam;
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| 58 | static CGparameter sPositionsTexGiParam;
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| 59 | static CGparameter sNormalsTexGiParam;
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| 60 |
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| 61 |
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| 62 | static CGparameter sOldModelViewProjMatrixGiParam;
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| 63 | static CGparameter sMaxDepthGiParam;
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| 64 | static CGparameter sSamplesGiParam;
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| 65 | static CGparameter sOldSsaoTexGiParam;
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| 66 | static CGparameter sOldIllumTexGiParam;
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| 67 | static CGparameter sNoiseTexGiParam;
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[2897] | 68 | static CGparameter sTemporalCoherenceGiParam;
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[2873] | 69 |
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| 70 |
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[2880] | 71 | static CGparameter sColorsTexCombinedIllumParam;
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| 72 | static CGparameter sSsaoTexCombinedIllumParam;
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| 73 | static CGparameter sIllumTexCombinedIllumParam;
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| 74 |
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| 75 | static CGparameter sColorsTexCombinedSsaoParam;
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| 76 | static CGparameter sSsaoTexCombinedSsaoParam;
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| 77 |
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| 78 |
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[2873] | 79 | ////////////
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| 80 |
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[2865] | 81 | static CGparameter sColorsTexAntiAliasingParam;
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| 82 | static CGparameter sNormalsTexAntiAliasingParam;
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| 83 |
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[2895] | 84 |
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| 85 | static CGparameter sShadowMapParam;
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| 86 | static CGparameter sPositionsTexShadowParam;
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| 87 | static CGparameter sColorsTexShadowParam;
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| 88 | static CGparameter sNormalsTexShadowParam;
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| 89 |
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| 90 | static CGparameter sShadowMatrixParam;
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| 91 | static CGparameter sMaxDepthShadowParam;
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| 92 | static CGparameter sSampleWidthParam;
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| 93 |
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[2944] | 94 | static CGparameter sNoiseTexShadowParam;
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| 95 | static CGparameter sSamplesShadowParam;
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| 96 |
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[2952] | 97 | static CGparameter sLightDirParam;
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| 98 | static CGparameter sLightDirShadowParam;
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[2944] | 99 |
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[2966] | 100 | static CGparameter sImageKeyParam;
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[2952] | 101 |
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[2903] | 102 | //#define USE_3D_SSAO
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[2895] | 103 |
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| 104 |
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[2879] | 105 | static GLuint noiseTex = 0;
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[2865] | 106 |
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[2859] | 107 | // ssao random spherical samples
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[2903] | 108 | #ifdef USE_3D_SSAO
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[2900] | 109 | static Sample2 samples3[NUM_SAMPLES];
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[2903] | 110 | #else
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| 111 | static Sample2 samples2[NUM_SAMPLES];
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| 112 | #endif
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| 113 |
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[2966] | 114 | // number of pcf tabs
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| 115 | Sample2 pcfSamples[NUM_PCF_TABS];
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| 116 |
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[2895] | 117 | static int colorBufferIdx = 0;
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[2859] | 118 |
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| 119 | static void PrintGLerror(char *msg)
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| 120 | {
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| 121 | GLenum errCode;
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| 122 | const GLubyte *errStr;
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| 123 |
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| 124 | if ((errCode = glGetError()) != GL_NO_ERROR)
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| 125 | {
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| 126 | errStr = gluErrorString(errCode);
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| 127 | fprintf(stderr,"OpenGL ERROR: %s: %s\n", errStr, msg);
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| 128 | }
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| 129 | }
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| 130 |
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| 131 |
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| 132 | /** Generate poisson disc distributed sample points on the unit disc
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| 133 | */
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[2887] | 134 | static void GenerateSamples(int sampling)
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[2859] | 135 | {
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[2903] | 136 | #ifdef USE_3D_SSAO
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| 137 |
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| 138 | SphericalSampleGenerator sph(NUM_SAMPLES, 1.0f);
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| 139 | sph.Generate((float *)samples3);
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| 140 |
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| 141 | #else
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[2887] | 142 | switch (sampling)
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| 143 | {
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[2930] | 144 | case DeferredRenderer::SAMPLING_POISSON:
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[2887] | 145 | {
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[2930] | 146 | PoissonDiscSampleGenerator2 poisson(NUM_SAMPLES, 1.0f);
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[2900] | 147 | poisson.Generate((float *)samples2);
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[2887] | 148 | }
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| 149 | break;
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[2930] | 150 | case DeferredRenderer::SAMPLING_QUADRATIC:
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[2887] | 151 | {
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[2930] | 152 | QuadraticDiscSampleGenerator2 g(NUM_SAMPLES, 1.0f);
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| 153 | g.Generate((float *)samples2);
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[2887] | 154 | }
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| 155 | break;
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[2930] | 156 | default: // SAMPLING_DEFAULT
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| 157 |
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| 158 | RandomSampleGenerator2 g(NUM_SAMPLES, 1.0f);
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| 159 | g.Generate((float *)samples2);
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[2903] | 160 | }
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| 161 | #endif
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[2859] | 162 | }
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| 163 |
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| 164 |
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[2879] | 165 | static void CreateNoiseTex2D(int w, int h)
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| 166 | {
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| 167 | //GLubyte *randomNormals = new GLubyte[mWidth * mHeight * 3];
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| 168 | float *randomNormals = new float[w * h * 3];
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| 169 |
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[2900] | 170 | static HaltonSequence halton;
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| 171 | float r[2];
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| 172 |
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[2879] | 173 | for (int i = 0; i < w * h * 3; i += 3)
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| 174 | {
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[2901] | 175 |
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[2903] | 176 | #ifdef USE_3D_SSAO
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| 177 | //halton.GetNext(2, r);
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| 178 | r[0] = RandomValue(0, 1);
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| 179 | r[1] = RandomValue(0, 1);
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[2879] | 180 |
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[2900] | 181 | const float theta = 2.0f * acos(sqrt(1.0f - r[0]));
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| 182 | const float phi = 2.0f * M_PI * r[1];
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| 183 |
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| 184 | randomNormals[i + 0] = sin(theta) * cos(phi);
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| 185 | randomNormals[i + 1] = sin(theta) * sin(phi);
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| 186 | randomNormals[i + 2] = cos(theta);
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[2903] | 187 | #else
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| 188 | // create random samples on a circle
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| 189 | r[0] = RandomValue(0, 1);
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| 190 | //halton.GetNext(1, r);
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| 191 |
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| 192 | const float theta = 2.0f * acos(sqrt(1.0f - r[0]));
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| 193 |
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| 194 | randomNormals[i + 0] = cos(theta);
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| 195 | randomNormals[i + 1] = sin(theta);
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| 196 | randomNormals[i + 2] = 0;
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| 197 | #endif
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[2879] | 198 | }
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| 199 |
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| 200 | glEnable(GL_TEXTURE_2D);
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| 201 | glGenTextures(1, &noiseTex);
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| 202 | glBindTexture(GL_TEXTURE_2D, noiseTex);
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| 203 |
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| 204 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
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| 205 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
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| 206 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
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| 207 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
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| 208 |
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[2884] | 209 | //glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB8, w, h, 0, GL_RGB, GL_UNSIGNED_BYTE, randomNormals);
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[2879] | 210 | glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA16F_ARB, w, h, 0, GL_RGB, GL_FLOAT, randomNormals);
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| 211 |
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| 212 | glBindTexture(GL_TEXTURE_2D, 0);
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| 213 | glDisable(GL_TEXTURE_2D);
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| 214 |
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| 215 | delete [] randomNormals;
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| 216 |
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| 217 | cout << "created noise texture" << endl;
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| 218 |
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| 219 | PrintGLerror("noisetexture");
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| 220 | }
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| 221 |
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| 222 |
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[2896] | 223 | DeferredRenderer::DeferredRenderer(int w, int h, Camera *cam, float scaleFactor):
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[2860] | 224 | mWidth(w), mHeight(h),
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| 225 | mCamera(cam),
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[2875] | 226 | mScaleFactor(scaleFactor),
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| 227 | mUseTemporalCoherence(true),
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[2895] | 228 | mRegenerateSamples(true),
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[2930] | 229 | mSamplingMethod(SAMPLING_POISSON),
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[2895] | 230 | mShadingMethod(DEFAULT),
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[2891] | 231 | mFboIndex(0)
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[2861] | 232 | {
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[2879] | 233 | // create noise texture for ssao
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| 234 | CreateNoiseTex2D(w, h);
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| 235 |
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[2965] | 236 |
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[2861] | 237 | ///////////
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| 238 | //-- the flip-flop fbos
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[2859] | 239 |
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[2891] | 240 | mFbo = new FrameBufferObject(w, h, FrameBufferObject::DEPTH_NONE);
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| 241 |
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[2965] | 242 | mFbo->AddColorBuffer(ColorBufferObject::BUFFER_FLOAT_32, ColorBufferObject::WRAP_CLAMP_TO_EDGE, ColorBufferObject::FILTER_LINEAR);
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| 243 | mFbo->AddColorBuffer(ColorBufferObject::BUFFER_FLOAT_32, ColorBufferObject::WRAP_CLAMP_TO_EDGE, ColorBufferObject::FILTER_LINEAR);
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| 244 | mFbo->AddColorBuffer(ColorBufferObject::BUFFER_FLOAT_32, ColorBufferObject::WRAP_CLAMP_TO_EDGE, ColorBufferObject::FILTER_LINEAR);
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| 245 | mFbo->AddColorBuffer(ColorBufferObject::BUFFER_FLOAT_32, ColorBufferObject::WRAP_CLAMP_TO_EDGE, ColorBufferObject::FILTER_LINEAR);
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[2861] | 246 | }
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| 247 |
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| 248 |
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[2896] | 249 | DeferredRenderer::~DeferredRenderer()
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[2861] | 250 | {
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[2879] | 251 | if (sCgSsaoProgram) cgDestroyProgram(sCgSsaoProgram);
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| 252 | if (sCgDeferredProgram) cgDestroyProgram(sCgDeferredProgram);
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| 253 | if (sCgSsaoProgram) cgDestroyProgram(sCgSsaoProgram);
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| 254 | if (sCgGiProgram) cgDestroyProgram(sCgGiProgram);
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| 255 | if (sCgAntiAliasingProgram) cgDestroyProgram(sCgAntiAliasingProgram);
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[2861] | 256 |
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[2891] | 257 | DEL_PTR(mFbo);
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[2861] | 258 |
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| 259 | glDeleteTextures(1, &noiseTex);
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| 260 | }
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| 261 |
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| 262 |
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[2896] | 263 | void DeferredRenderer::SetUseTemporalCoherence(bool temporal)
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[2875] | 264 | {
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| 265 | mUseTemporalCoherence = temporal;
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| 266 | }
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| 267 |
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| 268 |
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[2896] | 269 | void DeferredRenderer::Init(CGcontext context)
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[2861] | 270 | {
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[2873] | 271 | sCgDeferredProgram =
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[2868] | 272 | cgCreateProgramFromFile(context,
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| 273 | CG_SOURCE,
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| 274 | "src/shaders/deferred.cg",
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| 275 | RenderState::sCgFragmentProfile,
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[2873] | 276 | "main",
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[2868] | 277 | NULL);
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| 278 |
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[2873] | 279 | if (sCgDeferredProgram != NULL)
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[2868] | 280 | {
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[2873] | 281 | cgGLLoadProgram(sCgDeferredProgram);
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[2868] | 282 |
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| 283 | // we need size of texture for scaling
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[2873] | 284 | sPositionsTexDeferredParam = cgGetNamedParameter(sCgDeferredProgram, "positions");
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| 285 | sColorsTexDeferredParam = cgGetNamedParameter(sCgDeferredProgram, "colors");
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[2944] | 286 | sNormalsTexDeferredParam = cgGetNamedParameter(sCgDeferredProgram, "normals");
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[2952] | 287 | sLightDirParam = cgGetNamedParameter(sCgDeferredProgram, "lightDir");
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[2868] | 288 | }
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| 289 | else
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| 290 | cerr << "deferred program failed to load" << endl;
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| 291 |
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| 292 |
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[2859] | 293 | ///////////////
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| 294 |
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| 295 | sCgSsaoProgram =
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| 296 | cgCreateProgramFromFile(context,
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| 297 | CG_SOURCE,
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[2903] | 298 | #ifdef USE_3D_SSAO
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[2932] | 299 | "src/shaders/ssao3d.cg",
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[2903] | 300 | #else
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| 301 | "src/shaders/ssao.cg",
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| 302 | #endif
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[2859] | 303 | RenderState::sCgFragmentProfile,
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[2868] | 304 | "main",
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[2859] | 305 | NULL);
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| 306 |
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| 307 | if (sCgSsaoProgram != NULL)
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| 308 | {
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| 309 | cgGLLoadProgram(sCgSsaoProgram);
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| 310 |
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| 311 | sPositionsTexParam = cgGetNamedParameter(sCgSsaoProgram, "positions");
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| 312 | sColorsTexParam = cgGetNamedParameter(sCgSsaoProgram, "colors");
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| 313 | sNormalsTexParam = cgGetNamedParameter(sCgSsaoProgram, "normals");
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| 314 | sNoiseTexParam = cgGetNamedParameter(sCgSsaoProgram, "noiseTexture");
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[2868] | 315 |
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[2859] | 316 | sOldModelViewProjMatrixParam = cgGetNamedParameter(sCgSsaoProgram, "oldModelViewProj");
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[2900] | 317 | sModelViewProjMatrixParam = cgGetNamedParameter(sCgSsaoProgram, "mymodelViewProj");
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[2859] | 318 | sMaxDepthParam = cgGetNamedParameter(sCgSsaoProgram, "maxDepth");
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[2897] | 319 | sTemporalCoherenceParam = cgGetNamedParameter(sCgSsaoProgram, "temporalCoherence");
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[2859] | 320 |
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| 321 | sOldTexParam = cgGetNamedParameter(sCgSsaoProgram, "oldTex");
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[2884] | 322 | sSamplesParam = cgGetNamedParameter(sCgSsaoProgram, "samples");
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[2859] | 323 | }
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| 324 | else
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| 325 | cerr << "ssao program failed to load" << endl;
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| 326 |
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[2873] | 327 | sCgGiProgram =
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| 328 | cgCreateProgramFromFile(context,
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| 329 | CG_SOURCE,
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| 330 | "src/shaders/globillum.cg",
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| 331 | RenderState::sCgFragmentProfile,
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| 332 | "main",
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| 333 | NULL);
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| 334 |
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| 335 | if (sCgGiProgram != NULL)
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| 336 | {
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| 337 | cgGLLoadProgram(sCgGiProgram);
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| 338 |
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| 339 | // we need size of texture for scaling
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| 340 | sPositionsTexGiParam = cgGetNamedParameter(sCgGiProgram, "positions");
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| 341 | sColorsTexGiParam = cgGetNamedParameter(sCgGiProgram, "colors");
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| 342 | sNormalsTexGiParam = cgGetNamedParameter(sCgGiProgram, "normals");
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| 343 |
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[2874] | 344 | sOldModelViewProjMatrixGiParam = cgGetNamedParameter(sCgGiProgram, "oldModelViewProj");
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[2873] | 345 | sMaxDepthGiParam = cgGetNamedParameter(sCgGiProgram, "maxDepth");
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[2897] | 346 | sTemporalCoherenceGiParam = cgGetNamedParameter(sCgGiProgram, "temporalCoherence");
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[2873] | 347 |
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[2944] | 348 | sNoiseTexGiParam = cgGetNamedParameter(sCgGiProgram, "noiseTexture");
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[2873] | 349 | sSamplesGiParam = cgGetNamedParameter(sCgGiProgram, "samples");
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| 350 |
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| 351 | sOldSsaoTexGiParam = cgGetNamedParameter(sCgGiProgram, "oldSsaoTex");
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| 352 | sOldIllumTexGiParam = cgGetNamedParameter(sCgGiProgram, "oldIllumTex");
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| 353 | }
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| 354 | else
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| 355 | cerr << "globillum program failed to load" << endl;
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| 356 |
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[2880] | 357 | sCgCombinedIllumProgram =
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| 358 | cgCreateProgramFromFile(context,
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| 359 | CG_SOURCE,
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| 360 | "src/shaders/globillum.cg",
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| 361 | RenderState::sCgFragmentProfile,
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| 362 | "combine",
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| 363 | NULL);
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| 364 |
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| 365 | if (sCgCombinedIllumProgram != NULL)
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| 366 | {
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| 367 | cgGLLoadProgram(sCgCombinedIllumProgram);
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| 368 |
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| 369 | sColorsTexCombinedIllumParam = cgGetNamedParameter(sCgCombinedIllumProgram, "colors");
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| 370 | sSsaoTexCombinedIllumParam = cgGetNamedParameter(sCgCombinedIllumProgram, "ssaoTex");
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| 371 | sIllumTexCombinedIllumParam = cgGetNamedParameter(sCgCombinedIllumProgram, "illumTex");
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| 372 | }
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| 373 | else
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| 374 | cerr << "combined illum program failed to load" << endl;
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| 375 |
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| 376 |
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| 377 | sCgCombinedSsaoProgram =
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| 378 | cgCreateProgramFromFile(context,
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| 379 | CG_SOURCE,
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| 380 | "src/shaders/ssao.cg",
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| 381 | RenderState::sCgFragmentProfile,
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| 382 | "combine",
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| 383 | NULL);
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| 384 |
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| 385 | if (sCgCombinedSsaoProgram != NULL)
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| 386 | {
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| 387 | cgGLLoadProgram(sCgCombinedSsaoProgram);
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| 388 |
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| 389 | sColorsTexCombinedSsaoParam = cgGetNamedParameter(sCgCombinedSsaoProgram, "colors");
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| 390 | sSsaoTexCombinedSsaoParam = cgGetNamedParameter(sCgCombinedSsaoProgram, "ssaoTex");
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| 391 | }
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| 392 | else
|
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| 393 | cerr << "combied illum program failed to load" << endl;
|
---|
| 394 |
|
---|
| 395 |
|
---|
[2865] | 396 | sCgAntiAliasingProgram =
|
---|
| 397 | cgCreateProgramFromFile(context,
|
---|
| 398 | CG_SOURCE,
|
---|
| 399 | "src/shaders/antialiasing.cg",
|
---|
| 400 | RenderState::sCgFragmentProfile,
|
---|
| 401 | "main",
|
---|
| 402 | NULL);
|
---|
| 403 |
|
---|
| 404 | if (sCgAntiAliasingProgram != NULL)
|
---|
| 405 | {
|
---|
| 406 | cgGLLoadProgram(sCgAntiAliasingProgram);
|
---|
| 407 |
|
---|
[2967] | 408 | sImageKeyParam = cgGetNamedParameter(sCgAntiAliasingProgram, "imageKey");
|
---|
| 409 |
|
---|
[2865] | 410 | sColorsTexAntiAliasingParam = cgGetNamedParameter(sCgAntiAliasingProgram, "colors");
|
---|
| 411 | sNormalsTexAntiAliasingParam = cgGetNamedParameter(sCgAntiAliasingProgram, "normals");
|
---|
| 412 | }
|
---|
| 413 | else
|
---|
| 414 | cerr << "antialiasing program failed to load" << endl;
|
---|
| 415 |
|
---|
[2895] | 416 | sCgDeferredShadowProgram =
|
---|
| 417 | cgCreateProgramFromFile(context,
|
---|
| 418 | CG_SOURCE,
|
---|
| 419 | "src/shaders/deferred.cg",
|
---|
| 420 | RenderState::sCgFragmentProfile,
|
---|
| 421 | "main_shadow",
|
---|
| 422 | NULL);
|
---|
| 423 |
|
---|
| 424 | if (sCgDeferredShadowProgram != NULL)
|
---|
| 425 | {
|
---|
| 426 | cgGLLoadProgram(sCgDeferredShadowProgram);
|
---|
| 427 |
|
---|
| 428 | // we need size of texture for scaling
|
---|
| 429 | sPositionsTexShadowParam = cgGetNamedParameter(sCgDeferredShadowProgram, "positions");
|
---|
| 430 | sColorsTexShadowParam = cgGetNamedParameter(sCgDeferredShadowProgram, "colors");
|
---|
| 431 | sNormalsTexShadowParam = cgGetNamedParameter(sCgDeferredShadowProgram, "normals");
|
---|
| 432 |
|
---|
| 433 | sShadowMapParam = cgGetNamedParameter(sCgDeferredShadowProgram, "shadowMap");
|
---|
| 434 | sMaxDepthShadowParam = cgGetNamedParameter(sCgDeferredShadowProgram, "maxDepth");
|
---|
| 435 | sSampleWidthParam = cgGetNamedParameter(sCgDeferredShadowProgram, "sampleWidth");
|
---|
| 436 | sShadowMatrixParam = cgGetNamedParameter(sCgDeferredShadowProgram, "shadowMatrix");
|
---|
[2928] | 437 |
|
---|
[2944] | 438 | sNoiseTexShadowParam = cgGetNamedParameter(sCgDeferredShadowProgram, "noiseTexture");
|
---|
| 439 | sSamplesShadowParam = cgGetNamedParameter(sCgDeferredShadowProgram, "samples");
|
---|
[2952] | 440 | sLightDirShadowParam = cgGetNamedParameter(sCgDeferredShadowProgram, "lightDir");
|
---|
[2928] | 441 |
|
---|
[2966] | 442 |
|
---|
| 443 | PoissonDiscSampleGenerator2 poisson(NUM_PCF_TABS, 1.0f);
|
---|
[2944] | 444 | poisson.Generate((float *)pcfSamples);
|
---|
[2928] | 445 |
|
---|
[2966] | 446 | cgGLSetParameterArray2f(sSamplesShadowParam, 0, NUM_PCF_TABS, (const float *)pcfSamples);
|
---|
[2928] | 447 | }
|
---|
| 448 | else
|
---|
[2944] | 449 | cerr << "deferred program failed to load" << endl;
|
---|
[2928] | 450 |
|
---|
[2859] | 451 | PrintGLerror("init");
|
---|
| 452 | }
|
---|
| 453 |
|
---|
| 454 |
|
---|
[2896] | 455 | void DeferredRenderer::Render(FrameBufferObject *fbo,
|
---|
[2897] | 456 | const Matrix4x4 &oldProjViewMatrix,
|
---|
[2900] | 457 | const Matrix4x4 &projViewMatrix,
|
---|
[2901] | 458 | float tempCohFactor,
|
---|
[2952] | 459 | DirectionalLight *light,
|
---|
[2897] | 460 | ShadowMap *shadowMap)
|
---|
[2859] | 461 | {
|
---|
[2868] | 462 | // switch roles of old and new fbo
|
---|
| 463 | // the algorihm uses two input fbos, where the one
|
---|
| 464 | // contais the color buffer from the last frame,
|
---|
| 465 | // the other one will be written
|
---|
[2897] | 466 |
|
---|
| 467 | mFboIndex = 2 - mFboIndex;
|
---|
[2891] | 468 | //swap(mNewFbo, mOldFbo);
|
---|
[2897] | 469 |
|
---|
[2868] | 470 | FrameBufferObject::Release();
|
---|
| 471 |
|
---|
[2867] | 472 | cgGLEnableProfile(RenderState::sCgFragmentProfile);
|
---|
| 473 |
|
---|
| 474 | glDisable(GL_ALPHA_TEST);
|
---|
| 475 | glDisable(GL_TEXTURE_2D);
|
---|
| 476 | glDisable(GL_LIGHTING);
|
---|
| 477 |
|
---|
[2880] | 478 | glPushAttrib(GL_VIEWPORT_BIT);
|
---|
| 479 | glViewport(0, 0, mWidth, mHeight);
|
---|
| 480 |
|
---|
[2867] | 481 | glMatrixMode(GL_PROJECTION);
|
---|
| 482 | glPushMatrix();
|
---|
| 483 | glLoadIdentity();
|
---|
| 484 |
|
---|
[2897] | 485 | const float offs = 0.5f;
|
---|
| 486 | glOrtho(-offs, offs, -offs, offs, 0, 1);
|
---|
| 487 |
|
---|
[2867] | 488 | glMatrixMode(GL_MODELVIEW);
|
---|
| 489 | glPushMatrix();
|
---|
| 490 | glLoadIdentity();
|
---|
| 491 |
|
---|
[2944] | 492 | if (shadowMap)
|
---|
[2952] | 493 | FirstPassShadow(fbo, light, shadowMap);
|
---|
[2895] | 494 | else
|
---|
[2952] | 495 | FirstPass(fbo, light);
|
---|
[2944] | 496 |
|
---|
| 497 | switch (mShadingMethod)
|
---|
[2880] | 498 | {
|
---|
[2944] | 499 | case SSAO:
|
---|
| 500 | ComputeSsao(fbo, tempCohFactor, oldProjViewMatrix, projViewMatrix);
|
---|
| 501 | CombineSsao(fbo);
|
---|
| 502 | break;
|
---|
| 503 | case GI:
|
---|
| 504 | ComputeGlobIllum(fbo, tempCohFactor, oldProjViewMatrix);
|
---|
| 505 | CombineIllum(fbo);
|
---|
| 506 | break;
|
---|
| 507 | default: // DEFAULT
|
---|
| 508 | // do nothing: standard deferred shading
|
---|
| 509 | break;
|
---|
| 510 | }
|
---|
[2884] | 511 |
|
---|
[2944] | 512 | AntiAliasing(fbo);
|
---|
[2867] | 513 |
|
---|
| 514 | glEnable(GL_LIGHTING);
|
---|
| 515 | glDisable(GL_TEXTURE_2D);
|
---|
| 516 |
|
---|
| 517 | glMatrixMode(GL_PROJECTION);
|
---|
| 518 | glPopMatrix();
|
---|
| 519 |
|
---|
| 520 | glMatrixMode(GL_MODELVIEW);
|
---|
| 521 | glPopMatrix();
|
---|
| 522 |
|
---|
| 523 | glPopAttrib();
|
---|
| 524 |
|
---|
| 525 | cgGLDisableProfile(RenderState::sCgFragmentProfile);
|
---|
[2859] | 526 | }
|
---|
| 527 |
|
---|
| 528 |
|
---|
[2896] | 529 | void DeferredRenderer::ComputeSsao(FrameBufferObject *fbo,
|
---|
[2901] | 530 | float tempCohFactor,
|
---|
[2900] | 531 | const Matrix4x4 &oldProjViewMatrix,
|
---|
| 532 | const Matrix4x4 &projViewMatrix
|
---|
| 533 | )
|
---|
[2859] | 534 | {
|
---|
[2903] | 535 | #ifdef USE_3D_SSAO
|
---|
[2900] | 536 | static Matrix4x4 biasMatrix(0.5f, 0.0f, 0.0f, 0.5f,
|
---|
| 537 | 0.0f, 0.5f, 0.0f, 0.5f,
|
---|
| 538 | 0.0f, 0.0f, 0.5f, 0.5f,
|
---|
| 539 | 0.0f, 0.0f, 0.0f, 1.0f); //bias from [-1, 1] to [0, 1]
|
---|
| 540 |
|
---|
| 541 | Matrix4x4 m = projViewMatrix * biasMatrix;
|
---|
| 542 |
|
---|
| 543 | cgGLSetMatrixParameterfc(sModelViewProjMatrixParam, (const float *)m.x);
|
---|
[2903] | 544 | #endif
|
---|
[2874] | 545 |
|
---|
[2903] | 546 | cgGLSetMatrixParameterfc(sOldModelViewProjMatrixParam, (const float *)oldProjViewMatrix.x);
|
---|
| 547 |
|
---|
[2879] | 548 | GLuint colorsTex = fbo->GetColorBuffer(3)->GetTexture();
|
---|
[2861] | 549 | GLuint positionsTex = fbo->GetColorBuffer(1)->GetTexture();
|
---|
| 550 | GLuint normalsTex = fbo->GetColorBuffer(2)->GetTexture();
|
---|
[2859] | 551 |
|
---|
[2867] | 552 | if (1)
|
---|
| 553 | {
|
---|
| 554 | // generate mip map levels for position texture
|
---|
| 555 | glBindTexture(GL_TEXTURE_2D, positionsTex);
|
---|
| 556 | glGenerateMipmapEXT(GL_TEXTURE_2D);
|
---|
| 557 | }
|
---|
| 558 |
|
---|
| 559 |
|
---|
[2861] | 560 | // read the second buffer, write to the first buffer
|
---|
[2891] | 561 | //mNewFbo->Bind();
|
---|
| 562 | mFbo->Bind();
|
---|
[2899] | 563 | glDrawBuffers(1, mrt + mFboIndex);
|
---|
[2868] | 564 |
|
---|
[2880] | 565 |
|
---|
[2891] | 566 | //GLuint oldTex = mOldFbo->GetColorBuffer(0)->GetTexture();
|
---|
| 567 | GLuint oldTex = mFbo->GetColorBuffer(2 - mFboIndex)->GetTexture();
|
---|
[2860] | 568 |
|
---|
[2859] | 569 | glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
|
---|
| 570 |
|
---|
[2868] | 571 | cgGLEnableProfile(RenderState::sCgFragmentProfile);
|
---|
[2859] | 572 | cgGLBindProgram(sCgSsaoProgram);
|
---|
| 573 |
|
---|
| 574 | cgGLSetTextureParameter(sPositionsTexParam, positionsTex);
|
---|
| 575 | cgGLEnableTextureParameter(sPositionsTexParam);
|
---|
| 576 |
|
---|
| 577 | cgGLSetTextureParameter(sColorsTexParam, colorsTex);
|
---|
| 578 | cgGLEnableTextureParameter(sColorsTexParam);
|
---|
| 579 |
|
---|
| 580 | cgGLSetTextureParameter(sNormalsTexParam, normalsTex);
|
---|
| 581 | cgGLEnableTextureParameter(sNormalsTexParam);
|
---|
| 582 |
|
---|
| 583 | cgGLSetTextureParameter(sNoiseTexParam, noiseTex);
|
---|
| 584 | cgGLEnableTextureParameter(sNoiseTexParam);
|
---|
| 585 |
|
---|
| 586 | cgGLSetTextureParameter(sOldTexParam, oldTex);
|
---|
| 587 | cgGLEnableTextureParameter(sOldTexParam);
|
---|
| 588 |
|
---|
| 589 | cgGLSetParameter1f(sMaxDepthParam, mScaleFactor);
|
---|
[2875] | 590 |
|
---|
[2901] | 591 | cgGLSetParameter1f(sTemporalCoherenceParam, (mUseTemporalCoherence && !mRegenerateSamples) ? tempCohFactor : 0);
|
---|
[2893] | 592 |
|
---|
[2895] | 593 | if (mUseTemporalCoherence || mRegenerateSamples)
|
---|
[2875] | 594 | {
|
---|
[2895] | 595 | mRegenerateSamples = false;
|
---|
[2859] | 596 |
|
---|
[2875] | 597 | // q: should we generate new samples or only rotate the old ones?
|
---|
| 598 | // in the first case, the sample patterns look nicer, but the kernel
|
---|
| 599 | // needs longer to converge
|
---|
[2895] | 600 | GenerateSamples(mSamplingMethod);
|
---|
[2900] | 601 |
|
---|
[2903] | 602 | #ifdef USE_3D_SSAO
|
---|
[2900] | 603 | cgGLSetParameterArray3f(sSamplesParam, 0, NUM_SAMPLES, (const float *)samples3);
|
---|
[2903] | 604 | #else
|
---|
| 605 | cgGLSetParameterArray2f(sSamplesParam, 0, NUM_SAMPLES, (const float *)samples2);
|
---|
| 606 | #endif
|
---|
[2875] | 607 | }
|
---|
[2859] | 608 |
|
---|
| 609 | Vector3 tl, tr, bl, br;
|
---|
| 610 | ComputeViewVectors(tl, tr, bl, br);
|
---|
| 611 |
|
---|
| 612 | glBegin(GL_QUADS);
|
---|
| 613 |
|
---|
| 614 | // note: slightly larger texture hides ambient occlusion error on border but costs resolution
|
---|
[2860] | 615 | //const float new_offs = 0.55f;
|
---|
| 616 | const float new_offs = 0.5f;
|
---|
[2891] | 617 |
|
---|
[2890] | 618 | glTexCoord2f(0, 0); glMultiTexCoord3fARB(GL_TEXTURE1_ARB, bl.x, bl.y, bl.z); glVertex3f(-new_offs, -new_offs, -0.5f);
|
---|
| 619 | glTexCoord2f(1, 0); glMultiTexCoord3fARB(GL_TEXTURE1_ARB, br.x, br.y, br.z); glVertex3f( new_offs, -new_offs, -0.5f);
|
---|
| 620 | glTexCoord2f(1, 1); glMultiTexCoord3fARB(GL_TEXTURE1_ARB, tr.x, tr.y, tr.z); glVertex3f( new_offs, new_offs, -0.5f);
|
---|
| 621 | glTexCoord2f(0, 1); glMultiTexCoord3fARB(GL_TEXTURE1_ARB, tl.x, tl.y, tl.z); glVertex3f(-new_offs, new_offs, -0.5f);
|
---|
[2859] | 622 |
|
---|
| 623 | glEnd();
|
---|
| 624 |
|
---|
[2860] | 625 | cgGLDisableTextureParameter(sColorsTexParam);
|
---|
| 626 | cgGLDisableTextureParameter(sPositionsTexParam);
|
---|
| 627 | cgGLDisableTextureParameter(sNormalsTexParam);
|
---|
| 628 | cgGLDisableTextureParameter(sNoiseTexParam);
|
---|
| 629 | cgGLDisableTextureParameter(sOldTexParam);
|
---|
[2859] | 630 |
|
---|
[2880] | 631 |
|
---|
[2861] | 632 | FrameBufferObject::Release();
|
---|
[2859] | 633 |
|
---|
| 634 | PrintGLerror("ssao first pass");
|
---|
| 635 | }
|
---|
| 636 |
|
---|
| 637 |
|
---|
[2896] | 638 | void DeferredRenderer::ComputeViewVectors(Vector3 &tl, Vector3 &tr, Vector3 &bl, Vector3 &br)
|
---|
[2860] | 639 | {
|
---|
| 640 | Vector3 ftl, ftr, fbl, fbr, ntl, ntr, nbl, nbr;
|
---|
[2859] | 641 |
|
---|
[2860] | 642 | mCamera->ComputePoints(ftl, ftr, fbl, fbr, ntl, ntr, nbl, nbr);
|
---|
| 643 |
|
---|
[2888] | 644 | bl = Normalize(nbl - fbl);
|
---|
| 645 | br = Normalize(nbr - fbr);
|
---|
| 646 | tl = Normalize(ntl - ftl);
|
---|
| 647 | tr = Normalize(ntr - ftr);
|
---|
[2860] | 648 | }
|
---|
| 649 |
|
---|
| 650 |
|
---|
| 651 |
|
---|
[2865] | 652 | static void SetVertex(float x, float y, float x_offs, float y_offs)
|
---|
| 653 | {
|
---|
| 654 | glMultiTexCoord2fARB(GL_TEXTURE0_ARB, x, y); // center
|
---|
| 655 | glMultiTexCoord2fARB(GL_TEXTURE1_ARB, x - x_offs, y + y_offs); // left top
|
---|
| 656 | glMultiTexCoord2fARB(GL_TEXTURE2_ARB, x + x_offs, y - y_offs); // right bottom
|
---|
| 657 | glMultiTexCoord2fARB(GL_TEXTURE3_ARB, x + x_offs, y + y_offs); // right top
|
---|
| 658 | glMultiTexCoord2fARB(GL_TEXTURE4_ARB, x - x_offs, y - y_offs); // left bottom
|
---|
| 659 |
|
---|
| 660 | glMultiTexCoord4fARB(GL_TEXTURE5_ARB, x - x_offs, y, x + x_offs, y); // left right
|
---|
| 661 | glMultiTexCoord4fARB(GL_TEXTURE6_ARB, x, y + y_offs, x, y - y_offs); // top bottom
|
---|
| 662 |
|
---|
| 663 | glVertex3f(x - 0.5f, y - 0.5f, -0.5f);
|
---|
| 664 | }
|
---|
| 665 |
|
---|
| 666 |
|
---|
[2896] | 667 | void DeferredRenderer::AntiAliasing(FrameBufferObject *fbo)
|
---|
[2865] | 668 | {
|
---|
[2967] | 669 | const float imageKey = ToneMapper().CalcImageKey(fbo->GetColorBuffer(colorBufferIdx));
|
---|
| 670 |
|
---|
[2895] | 671 | GLuint colorsTex = fbo->GetColorBuffer(colorBufferIdx)->GetTexture();
|
---|
[2865] | 672 | GLuint normalsTex = fbo->GetColorBuffer(2)->GetTexture();
|
---|
| 673 |
|
---|
| 674 | glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
|
---|
| 675 |
|
---|
| 676 | cgGLEnableProfile(RenderState::sCgFragmentProfile);
|
---|
| 677 | cgGLBindProgram(sCgAntiAliasingProgram);
|
---|
[2868] | 678 |
|
---|
[2865] | 679 | cgGLSetTextureParameter(sColorsTexAntiAliasingParam, colorsTex);
|
---|
| 680 | cgGLEnableTextureParameter(sColorsTexAntiAliasingParam);
|
---|
| 681 |
|
---|
| 682 | cgGLSetTextureParameter(sNormalsTexAntiAliasingParam, normalsTex);
|
---|
| 683 | cgGLEnableTextureParameter(sNormalsTexAntiAliasingParam);
|
---|
[2868] | 684 |
|
---|
[2967] | 685 | cgGLSetParameter1f(sImageKeyParam, imageKey);
|
---|
| 686 |
|
---|
[2865] | 687 | glColor3f(1.0f, 1.0f, 1.0f);
|
---|
| 688 |
|
---|
| 689 | float offs2 = 0.5f;
|
---|
| 690 |
|
---|
| 691 | glBegin(GL_QUADS);
|
---|
| 692 |
|
---|
| 693 | // the neighbouring texels
|
---|
| 694 | float x_offs = 1.0f / mWidth;
|
---|
| 695 | float y_offs = 1.0f / mHeight;
|
---|
| 696 |
|
---|
| 697 | SetVertex(0, 0, x_offs, y_offs);
|
---|
| 698 | SetVertex(1, 0, x_offs, y_offs);
|
---|
| 699 | SetVertex(1, 1, x_offs, y_offs);
|
---|
| 700 | SetVertex(0, 1, x_offs, y_offs);
|
---|
| 701 |
|
---|
| 702 | glEnd();
|
---|
| 703 |
|
---|
| 704 | cgGLDisableTextureParameter(sColorsTexAntiAliasingParam);
|
---|
| 705 | cgGLDisableTextureParameter(sNormalsTexAntiAliasingParam);
|
---|
| 706 |
|
---|
[2867] | 707 | PrintGLerror("antialiasing");
|
---|
[2865] | 708 | }
|
---|
| 709 |
|
---|
| 710 |
|
---|
[2952] | 711 | void DeferredRenderer::FirstPass(FrameBufferObject *fbo, DirectionalLight *light)
|
---|
[2868] | 712 | {
|
---|
| 713 | GLuint colorsTex = fbo->GetColorBuffer(0)->GetTexture();
|
---|
| 714 | GLuint positionsTex = fbo->GetColorBuffer(1)->GetTexture();
|
---|
| 715 | GLuint normalsTex = fbo->GetColorBuffer(2)->GetTexture();
|
---|
| 716 |
|
---|
[2879] | 717 | fbo->Bind();
|
---|
[2868] | 718 |
|
---|
[2895] | 719 | colorBufferIdx = 3;
|
---|
[2899] | 720 | glDrawBuffers(1, mrt + colorBufferIdx);
|
---|
[2879] | 721 |
|
---|
[2868] | 722 | glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
|
---|
| 723 |
|
---|
| 724 | cgGLEnableProfile(RenderState::sCgFragmentProfile);
|
---|
| 725 |
|
---|
[2873] | 726 | cgGLBindProgram(sCgDeferredProgram);
|
---|
[2868] | 727 |
|
---|
| 728 | cgGLSetTextureParameter(sColorsTexDeferredParam, colorsTex);
|
---|
| 729 | cgGLEnableTextureParameter(sColorsTexDeferredParam);
|
---|
| 730 |
|
---|
| 731 | cgGLSetTextureParameter(sPositionsTexDeferredParam, positionsTex);
|
---|
| 732 | cgGLEnableTextureParameter(sPositionsTexDeferredParam);
|
---|
| 733 |
|
---|
| 734 | cgGLSetTextureParameter(sNormalsTexDeferredParam, normalsTex);
|
---|
| 735 | cgGLEnableTextureParameter(sNormalsTexDeferredParam);
|
---|
| 736 |
|
---|
[2952] | 737 | Vector3 lightDir = -light->GetDirection();
|
---|
| 738 | cgGLSetParameter3f(sLightDirParam, lightDir.x, lightDir.y, lightDir.z);
|
---|
| 739 |
|
---|
[2966] | 740 |
|
---|
[2868] | 741 | glColor3f(1.0f, 1.0f, 1.0f);
|
---|
| 742 |
|
---|
| 743 | const float offs = 0.5f;
|
---|
| 744 |
|
---|
| 745 | glBegin(GL_QUADS);
|
---|
| 746 |
|
---|
| 747 | glTexCoord2f(0, 0); glVertex3f(-offs, -offs, -0.5f);
|
---|
| 748 | glTexCoord2f(1, 0); glVertex3f( offs, -offs, -0.5f);
|
---|
| 749 | glTexCoord2f(1, 1); glVertex3f( offs, offs, -0.5f);
|
---|
| 750 | glTexCoord2f(0, 1); glVertex3f(-offs, offs, -0.5f);
|
---|
| 751 |
|
---|
| 752 | glEnd();
|
---|
| 753 |
|
---|
| 754 | cgGLDisableTextureParameter(sColorsTexDeferredParam);
|
---|
| 755 | cgGLDisableTextureParameter(sPositionsTexDeferredParam);
|
---|
| 756 | cgGLDisableTextureParameter(sNormalsTexDeferredParam);
|
---|
| 757 |
|
---|
| 758 | cgGLDisableProfile(RenderState::sCgFragmentProfile);
|
---|
| 759 |
|
---|
| 760 | FrameBufferObject::Release();
|
---|
| 761 |
|
---|
| 762 | PrintGLerror("deferred shading");
|
---|
| 763 | }
|
---|
| 764 |
|
---|
[2869] | 765 |
|
---|
[2928] | 766 |
|
---|
[2896] | 767 | void DeferredRenderer::ComputeGlobIllum(FrameBufferObject *fbo,
|
---|
[2901] | 768 | float tempCohFactor,
|
---|
| 769 | const Matrix4x4 &oldProjViewMatrix)
|
---|
[2869] | 770 | {
|
---|
[2874] | 771 | cgGLSetMatrixParameterfc(sOldModelViewProjMatrixGiParam, (const float *)oldProjViewMatrix.x);
|
---|
| 772 |
|
---|
[2879] | 773 | GLuint colorsTex = fbo->GetColorBuffer(3)->GetTexture();
|
---|
[2873] | 774 | GLuint positionsTex = fbo->GetColorBuffer(1)->GetTexture();
|
---|
| 775 | GLuint normalsTex = fbo->GetColorBuffer(2)->GetTexture();
|
---|
[2869] | 776 |
|
---|
[2873] | 777 | if (1)
|
---|
| 778 | {
|
---|
| 779 | // generate mip map levels for position texture
|
---|
| 780 | glBindTexture(GL_TEXTURE_2D, positionsTex);
|
---|
| 781 | glGenerateMipmapEXT(GL_TEXTURE_2D);
|
---|
[2869] | 782 |
|
---|
[2873] | 783 | // generate mip map levels for position texture
|
---|
| 784 | glBindTexture(GL_TEXTURE_2D, colorsTex);
|
---|
| 785 | glGenerateMipmapEXT(GL_TEXTURE_2D);
|
---|
| 786 | }
|
---|
| 787 |
|
---|
| 788 |
|
---|
| 789 | // read the second buffer, write to the first buffer
|
---|
[2891] | 790 | mFbo->Bind();
|
---|
[2873] | 791 |
|
---|
[2899] | 792 | glDrawBuffers(2, mrt + mFboIndex);
|
---|
[2873] | 793 |
|
---|
[2891] | 794 | GLuint oldSsaoTex = mFbo->GetColorBuffer(2 - mFboIndex)->GetTexture();
|
---|
| 795 | GLuint oldIllumTex = mFbo->GetColorBuffer(2 - mFboIndex + 1)->GetTexture();
|
---|
| 796 |
|
---|
[2869] | 797 | glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
|
---|
| 798 |
|
---|
| 799 | cgGLEnableProfile(RenderState::sCgFragmentProfile);
|
---|
[2873] | 800 | cgGLBindProgram(sCgGiProgram);
|
---|
[2869] | 801 |
|
---|
[2873] | 802 | cgGLSetTextureParameter(sPositionsTexGiParam, positionsTex);
|
---|
| 803 | cgGLEnableTextureParameter(sPositionsTexGiParam);
|
---|
[2869] | 804 |
|
---|
[2873] | 805 | cgGLSetTextureParameter(sColorsTexGiParam, colorsTex);
|
---|
| 806 | cgGLEnableTextureParameter(sColorsTexGiParam);
|
---|
[2869] | 807 |
|
---|
[2873] | 808 | cgGLSetTextureParameter(sNormalsTexGiParam, normalsTex);
|
---|
| 809 | cgGLEnableTextureParameter(sNormalsTexGiParam);
|
---|
[2869] | 810 |
|
---|
[2873] | 811 | cgGLSetTextureParameter(sNoiseTexGiParam, noiseTex);
|
---|
| 812 | cgGLEnableTextureParameter(sNoiseTexGiParam);
|
---|
| 813 |
|
---|
| 814 | cgGLSetTextureParameter(sOldSsaoTexGiParam, oldSsaoTex);
|
---|
| 815 | cgGLEnableTextureParameter(sOldSsaoTexGiParam);
|
---|
| 816 |
|
---|
| 817 | cgGLSetTextureParameter(sOldIllumTexGiParam, oldIllumTex);
|
---|
| 818 | cgGLEnableTextureParameter(sOldIllumTexGiParam);
|
---|
| 819 |
|
---|
| 820 | cgGLSetParameter1f(sMaxDepthGiParam, mScaleFactor);
|
---|
| 821 |
|
---|
[2901] | 822 | cgGLSetParameter1f(sTemporalCoherenceGiParam, (mUseTemporalCoherence && !mRegenerateSamples) ? tempCohFactor : 0);
|
---|
[2873] | 823 |
|
---|
[2897] | 824 |
|
---|
[2895] | 825 | if (mUseTemporalCoherence || mRegenerateSamples)
|
---|
[2875] | 826 | {
|
---|
[2895] | 827 | mRegenerateSamples = false;
|
---|
[2873] | 828 |
|
---|
[2875] | 829 | // q: should we generate new samples or only rotate the old ones?
|
---|
| 830 | // in the first case, the sample patterns look nicer, but the kernel
|
---|
| 831 | // needs longer to converge
|
---|
[2895] | 832 | GenerateSamples(mSamplingMethod);
|
---|
[2903] | 833 |
|
---|
| 834 | #ifdef USE_3D_SSAO
|
---|
| 835 | cgGLSetParameterArray3f(sSamplesGiParam, 0, NUM_SAMPLES, (const float *)samples3);
|
---|
| 836 | #else
|
---|
[2900] | 837 | cgGLSetParameterArray2f(sSamplesGiParam, 0, NUM_SAMPLES, (const float *)samples2);
|
---|
[2903] | 838 | #endif
|
---|
[2875] | 839 | }
|
---|
| 840 |
|
---|
[2895] | 841 |
|
---|
[2873] | 842 | Vector3 tl, tr, bl, br;
|
---|
| 843 | ComputeViewVectors(tl, tr, bl, br);
|
---|
| 844 |
|
---|
[2869] | 845 | glBegin(GL_QUADS);
|
---|
| 846 |
|
---|
[2873] | 847 | // note: slightly larger texture hides ambient occlusion error on border but costs resolution
|
---|
| 848 | //const float new_offs = 0.55f;
|
---|
| 849 | const float new_offs = 0.5f;
|
---|
[2891] | 850 |
|
---|
| 851 | glTexCoord2f(0, 0); glMultiTexCoord3fARB(GL_TEXTURE1_ARB, bl.x, bl.y, bl.z); glVertex3f(-new_offs, -new_offs, -0.5f);
|
---|
| 852 | glTexCoord2f(1, 0); glMultiTexCoord3fARB(GL_TEXTURE1_ARB, br.x, br.y, br.z); glVertex3f( new_offs, -new_offs, -0.5f);
|
---|
| 853 | glTexCoord2f(1, 1); glMultiTexCoord3fARB(GL_TEXTURE1_ARB, tr.x, tr.y, tr.z); glVertex3f( new_offs, new_offs, -0.5f);
|
---|
| 854 | glTexCoord2f(0, 1); glMultiTexCoord3fARB(GL_TEXTURE1_ARB, tl.x, tl.y, tl.z); glVertex3f(-new_offs, new_offs, -0.5f);
|
---|
[2869] | 855 |
|
---|
| 856 | glEnd();
|
---|
| 857 |
|
---|
[2873] | 858 | cgGLDisableTextureParameter(sColorsTexGiParam);
|
---|
| 859 | cgGLDisableTextureParameter(sPositionsTexGiParam);
|
---|
| 860 | cgGLDisableTextureParameter(sNormalsTexGiParam);
|
---|
| 861 | cgGLDisableTextureParameter(sNoiseTexGiParam);
|
---|
| 862 | cgGLDisableTextureParameter(sOldSsaoTexGiParam);
|
---|
| 863 | cgGLDisableTextureParameter(sOldIllumTexGiParam);
|
---|
[2869] | 864 |
|
---|
| 865 | FrameBufferObject::Release();
|
---|
| 866 |
|
---|
[2873] | 867 | PrintGLerror("globillum first pass");
|
---|
[2869] | 868 | }
|
---|
| 869 |
|
---|
| 870 |
|
---|
[2896] | 871 | void DeferredRenderer::CombineIllum(FrameBufferObject *fbo)
|
---|
[2880] | 872 | {
|
---|
| 873 | GLuint colorsTex = fbo->GetColorBuffer(3)->GetTexture();
|
---|
[2884] | 874 |
|
---|
[2891] | 875 | //GLuint ssaoTex = mNewFbo->GetColorBuffer(0)->GetTexture();
|
---|
| 876 | //GLuint illumTex = mNewFbo->GetColorBuffer(1)->GetTexture();
|
---|
| 877 | GLuint ssaoTex = mFbo->GetColorBuffer(mFboIndex)->GetTexture();
|
---|
| 878 | GLuint illumTex = mFbo->GetColorBuffer(mFboIndex + 1)->GetTexture();
|
---|
[2880] | 879 |
|
---|
[2891] | 880 |
|
---|
[2880] | 881 | fbo->Bind();
|
---|
| 882 |
|
---|
[2884] | 883 | // overwrite old color texture
|
---|
[2895] | 884 | colorBufferIdx = 0;
|
---|
[2899] | 885 | glDrawBuffers(1, mrt + colorBufferIdx);
|
---|
[2880] | 886 |
|
---|
| 887 | cgGLEnableProfile(RenderState::sCgFragmentProfile);
|
---|
| 888 |
|
---|
| 889 | cgGLBindProgram(sCgCombinedIllumProgram);
|
---|
| 890 |
|
---|
[2881] | 891 | glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
|
---|
| 892 |
|
---|
| 893 |
|
---|
[2880] | 894 | cgGLSetTextureParameter(sColorsTexCombinedIllumParam, colorsTex);
|
---|
| 895 | cgGLEnableTextureParameter(sColorsTexCombinedIllumParam);
|
---|
| 896 |
|
---|
| 897 | cgGLSetTextureParameter(sSsaoTexCombinedIllumParam, ssaoTex);
|
---|
| 898 | cgGLEnableTextureParameter(sSsaoTexCombinedIllumParam);
|
---|
| 899 |
|
---|
| 900 | cgGLSetTextureParameter(sIllumTexCombinedIllumParam, illumTex);
|
---|
| 901 | cgGLEnableTextureParameter(sIllumTexCombinedIllumParam);
|
---|
| 902 |
|
---|
| 903 | glColor3f(1.0f, 1.0f, 1.0f);
|
---|
| 904 |
|
---|
| 905 | const float offs = 0.5f;
|
---|
| 906 |
|
---|
| 907 | glBegin(GL_QUADS);
|
---|
| 908 |
|
---|
| 909 | glTexCoord2f(0, 0); glVertex3f(-offs, -offs, -0.5f);
|
---|
| 910 | glTexCoord2f(1, 0); glVertex3f( offs, -offs, -0.5f);
|
---|
| 911 | glTexCoord2f(1, 1); glVertex3f( offs, offs, -0.5f);
|
---|
| 912 | glTexCoord2f(0, 1); glVertex3f(-offs, offs, -0.5f);
|
---|
| 913 |
|
---|
| 914 | glEnd();
|
---|
| 915 |
|
---|
| 916 | cgGLDisableTextureParameter(sColorsTexCombinedIllumParam);
|
---|
| 917 | cgGLDisableTextureParameter(sSsaoTexCombinedIllumParam);
|
---|
| 918 | cgGLDisableTextureParameter(sIllumTexCombinedIllumParam);
|
---|
| 919 |
|
---|
| 920 | cgGLDisableProfile(RenderState::sCgFragmentProfile);
|
---|
| 921 |
|
---|
| 922 | FrameBufferObject::Release();
|
---|
| 923 |
|
---|
| 924 | PrintGLerror("combine");
|
---|
| 925 | }
|
---|
| 926 |
|
---|
| 927 |
|
---|
[2896] | 928 | void DeferredRenderer::CombineSsao(FrameBufferObject *fbo)
|
---|
[2880] | 929 | {
|
---|
| 930 | GLuint colorsTex = fbo->GetColorBuffer(3)->GetTexture();
|
---|
[2891] | 931 | GLuint ssaoTex = mFbo->GetColorBuffer(mFboIndex)->GetTexture();
|
---|
[2880] | 932 |
|
---|
| 933 | fbo->Bind();
|
---|
| 934 |
|
---|
[2895] | 935 | // overwrite old color texture
|
---|
| 936 | colorBufferIdx = 0;
|
---|
[2899] | 937 | glDrawBuffers(1, mrt + colorBufferIdx);
|
---|
[2880] | 938 |
|
---|
| 939 | glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
|
---|
| 940 |
|
---|
| 941 | cgGLEnableProfile(RenderState::sCgFragmentProfile);
|
---|
| 942 |
|
---|
| 943 | cgGLBindProgram(sCgCombinedSsaoProgram);
|
---|
| 944 |
|
---|
| 945 | cgGLSetTextureParameter(sColorsTexCombinedSsaoParam, colorsTex);
|
---|
| 946 | cgGLEnableTextureParameter(sColorsTexCombinedSsaoParam);
|
---|
| 947 |
|
---|
| 948 | cgGLSetTextureParameter(sSsaoTexCombinedSsaoParam, ssaoTex);
|
---|
| 949 | cgGLEnableTextureParameter(sSsaoTexCombinedSsaoParam);
|
---|
| 950 |
|
---|
| 951 |
|
---|
| 952 | glColor3f(1.0f, 1.0f, 1.0f);
|
---|
| 953 |
|
---|
| 954 | const float offs = 0.5f;
|
---|
| 955 |
|
---|
| 956 | glBegin(GL_QUADS);
|
---|
| 957 |
|
---|
| 958 | glTexCoord2f(0, 0); glVertex3f(-offs, -offs, -0.5f);
|
---|
| 959 | glTexCoord2f(1, 0); glVertex3f( offs, -offs, -0.5f);
|
---|
| 960 | glTexCoord2f(1, 1); glVertex3f( offs, offs, -0.5f);
|
---|
| 961 | glTexCoord2f(0, 1); glVertex3f(-offs, offs, -0.5f);
|
---|
| 962 |
|
---|
| 963 | glEnd();
|
---|
| 964 |
|
---|
| 965 | cgGLDisableTextureParameter(sColorsTexCombinedSsaoParam);
|
---|
| 966 | cgGLDisableTextureParameter(sSsaoTexCombinedSsaoParam);
|
---|
| 967 |
|
---|
| 968 | cgGLDisableProfile(RenderState::sCgFragmentProfile);
|
---|
| 969 |
|
---|
| 970 | FrameBufferObject::Release();
|
---|
| 971 |
|
---|
| 972 | PrintGLerror("combine ssao");
|
---|
| 973 | }
|
---|
| 974 |
|
---|
| 975 |
|
---|
[2952] | 976 | void DeferredRenderer::FirstPassShadow(FrameBufferObject *fbo,
|
---|
| 977 | DirectionalLight *light,
|
---|
| 978 | ShadowMap *shadowMap)
|
---|
[2895] | 979 | {
|
---|
| 980 | GLuint colorsTex = fbo->GetColorBuffer(0)->GetTexture();
|
---|
[2880] | 981 |
|
---|
[2895] | 982 | GLuint positionsTex = fbo->GetColorBuffer(1)->GetTexture();
|
---|
| 983 | GLuint normalsTex = fbo->GetColorBuffer(2)->GetTexture();
|
---|
[2928] | 984 | GLuint shadowTex = shadowMap->GetDepthTexture();
|
---|
[2895] | 985 |
|
---|
| 986 | Matrix4x4 shadowMatrix;
|
---|
| 987 | shadowMap->GetTextureMatrix(shadowMatrix);
|
---|
| 988 |
|
---|
| 989 | fbo->Bind();
|
---|
| 990 |
|
---|
| 991 | colorBufferIdx = 3;
|
---|
[2899] | 992 | glDrawBuffers(1, mrt + colorBufferIdx);
|
---|
[2895] | 993 |
|
---|
| 994 |
|
---|
| 995 | glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
|
---|
| 996 |
|
---|
| 997 | cgGLBindProgram(sCgDeferredShadowProgram);
|
---|
| 998 |
|
---|
| 999 | cgGLSetTextureParameter(sColorsTexShadowParam, colorsTex);
|
---|
| 1000 | cgGLEnableTextureParameter(sColorsTexShadowParam);
|
---|
| 1001 |
|
---|
| 1002 | cgGLSetTextureParameter(sPositionsTexShadowParam, positionsTex);
|
---|
| 1003 | cgGLEnableTextureParameter(sPositionsTexShadowParam);
|
---|
| 1004 |
|
---|
| 1005 | cgGLSetTextureParameter(sNormalsTexShadowParam, normalsTex);
|
---|
| 1006 | cgGLEnableTextureParameter(sNormalsTexShadowParam);
|
---|
| 1007 |
|
---|
| 1008 | cgGLSetTextureParameter(sShadowMapParam, shadowTex);
|
---|
| 1009 | cgGLEnableTextureParameter(sShadowMapParam);
|
---|
| 1010 |
|
---|
| 1011 | cgGLSetParameter1f(sMaxDepthShadowParam, mScaleFactor);
|
---|
[2944] | 1012 | //cgGLSetParameter1f(sSampleWidthParam, 10.0f / shadowMap->GetSize());
|
---|
[2946] | 1013 | cgGLSetParameter1f(sSampleWidthParam, 2.0f / shadowMap->GetSize());
|
---|
| 1014 | //cgGLSetParameter1f(sSampleWidthParam, 2.0f / 2048);
|
---|
[2895] | 1015 |
|
---|
| 1016 | cgGLSetMatrixParameterfc(sShadowMatrixParam, (const float *)shadowMatrix.x);
|
---|
| 1017 |
|
---|
[2944] | 1018 | cgGLSetTextureParameter(sNoiseTexShadowParam, noiseTex);
|
---|
| 1019 | cgGLEnableTextureParameter(sNoiseTexShadowParam);
|
---|
| 1020 |
|
---|
[2952] | 1021 | Vector3 lightDir = -light->GetDirection();
|
---|
| 1022 | cgGLSetParameter3f(sLightDirShadowParam, lightDir.x, lightDir.y, lightDir.z);
|
---|
[2944] | 1023 |
|
---|
[2952] | 1024 |
|
---|
[2895] | 1025 | glColor3f(1.0f, 1.0f, 1.0f);
|
---|
| 1026 |
|
---|
| 1027 | glBegin(GL_QUADS);
|
---|
| 1028 |
|
---|
| 1029 | float offs2 = 0.5f;
|
---|
| 1030 |
|
---|
| 1031 | glTexCoord2f(0, 0); glVertex3f(-offs2, -offs2, -0.5f);
|
---|
| 1032 | glTexCoord2f(1, 0); glVertex3f( offs2, -offs2, -0.5f);
|
---|
| 1033 | glTexCoord2f(1, 1); glVertex3f( offs2, offs2, -0.5f);
|
---|
| 1034 | glTexCoord2f(0, 1); glVertex3f(-offs2, offs2, -0.5f);
|
---|
| 1035 |
|
---|
| 1036 | glEnd();
|
---|
| 1037 |
|
---|
| 1038 | cgGLDisableTextureParameter(sColorsTexShadowParam);
|
---|
| 1039 | cgGLDisableTextureParameter(sPositionsTexShadowParam);
|
---|
| 1040 | cgGLDisableTextureParameter(sNormalsTexShadowParam);
|
---|
| 1041 | cgGLDisableTextureParameter(sShadowMapParam);
|
---|
| 1042 |
|
---|
[2944] | 1043 | cgGLDisableTextureParameter(sNoiseTexShadowParam);
|
---|
| 1044 |
|
---|
[2895] | 1045 | FrameBufferObject::Release();
|
---|
| 1046 |
|
---|
| 1047 | PrintGLerror("deferred shading + shadows");
|
---|
| 1048 | }
|
---|
| 1049 |
|
---|
| 1050 |
|
---|
[2896] | 1051 | void DeferredRenderer::SetSamplingMethod(SAMPLING_METHOD s)
|
---|
[2895] | 1052 | {
|
---|
| 1053 | if (s != mSamplingMethod)
|
---|
| 1054 | {
|
---|
| 1055 | mSamplingMethod = s;
|
---|
| 1056 | mRegenerateSamples = true;
|
---|
| 1057 | }
|
---|
| 1058 | }
|
---|
| 1059 |
|
---|
[2897] | 1060 |
|
---|
| 1061 | void DeferredRenderer::SetShadingMethod(SHADING_METHOD s)
|
---|
| 1062 | {
|
---|
| 1063 | if (s != mShadingMethod)
|
---|
| 1064 | {
|
---|
| 1065 | mShadingMethod = s;
|
---|
| 1066 | mRegenerateSamples = true;
|
---|
| 1067 | }
|
---|
| 1068 | }
|
---|
| 1069 |
|
---|
[2965] | 1070 |
|
---|
| 1071 |
|
---|
| 1072 |
|
---|
| 1073 |
|
---|
[2858] | 1074 | } // namespace
|
---|