[2859] | 1 | #include "SsaoShader.h"
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| 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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[2858] | 8 |
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[2859] | 9 |
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[2858] | 10 | using namespace std;
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| 11 |
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[2879] | 12 | static GLenum mymrt[] = {GL_COLOR_ATTACHMENT0_EXT, GL_COLOR_ATTACHMENT1_EXT, GL_COLOR_ATTACHMENT2_EXT, GL_COLOR_ATTACHMENT3_EXT};
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[2858] | 13 |
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| 14 | namespace CHCDemoEngine
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| 15 | {
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| 16 |
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[2859] | 17 | static CGprogram sCgSsaoProgram = NULL;
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[2873] | 18 | static CGprogram sCgGiProgram = NULL;
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| 19 |
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| 20 | static CGprogram sCgDeferredProgram = NULL;
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[2868] | 21 | static CGprogram sCgAntiAliasingProgram = NULL;
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[2859] | 22 |
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[2869] | 23 | static CGparameter sColorsTexCombineParam;
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| 24 | static CGparameter sSsaoTexCombineParam;
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| 25 |
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[2868] | 26 | static CGparameter sColorsTexDeferredParam;
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| 27 | static CGparameter sPositionsTexDeferredParam;
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| 28 | static CGparameter sNormalsTexDeferredParam;
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| 29 |
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[2873] | 30 |
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[2880] | 31 | static CGprogram sCgCombinedSsaoProgram = NULL;
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| 32 | static CGprogram sCgCombinedIllumProgram = NULL;
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| 33 |
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[2873] | 34 | ///////////////////////////////////////7
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| 35 |
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| 36 |
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[2859] | 37 | static CGparameter sColorsTexParam;
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| 38 | static CGparameter sPositionsTexParam;
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| 39 | static CGparameter sNormalsTexParam;
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[2868] | 40 |
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[2859] | 41 | static CGparameter sOldModelViewProjMatrixParam;
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| 42 | static CGparameter sMaxDepthParam;
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| 43 | static CGparameter sSamplesParam;
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| 44 | static CGparameter sOldTexParam;
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| 45 | static CGparameter sNoiseTexParam;
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| 46 | static CGparameter sNoiseMultiplierParam;
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| 47 | static CGparameter sExpFactorParam;
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| 48 |
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[2873] | 49 |
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[2884] | 50 |
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[2873] | 51 | ///////////////////////////////////////
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| 52 |
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| 53 |
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| 54 | static CGparameter sColorsTexGiParam;
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| 55 | static CGparameter sPositionsTexGiParam;
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| 56 | static CGparameter sNormalsTexGiParam;
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| 57 |
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| 58 |
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| 59 | static CGparameter sOldModelViewProjMatrixGiParam;
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| 60 | static CGparameter sMaxDepthGiParam;
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| 61 | static CGparameter sSamplesGiParam;
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| 62 | static CGparameter sOldSsaoTexGiParam;
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| 63 | static CGparameter sOldIllumTexGiParam;
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| 64 | static CGparameter sNoiseTexGiParam;
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| 65 | static CGparameter sNoiseMultiplierGiParam;
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| 66 | static CGparameter sExpFactorGiParam;
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| 67 |
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| 68 |
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[2880] | 69 | static CGparameter sColorsTexCombinedIllumParam;
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| 70 | static CGparameter sSsaoTexCombinedIllumParam;
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| 71 | static CGparameter sIllumTexCombinedIllumParam;
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| 72 |
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| 73 | static CGparameter sColorsTexCombinedSsaoParam;
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| 74 | static CGparameter sSsaoTexCombinedSsaoParam;
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| 75 |
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| 76 |
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[2873] | 77 | ////////////
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| 78 |
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[2865] | 79 | static CGparameter sColorsTexAntiAliasingParam;
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| 80 | static CGparameter sNormalsTexAntiAliasingParam;
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| 81 |
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[2879] | 82 | static GLuint noiseTex = 0;
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[2865] | 83 |
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[2859] | 84 | // ssao random spherical samples
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| 85 | static Sample2 samples[NUM_SAMPLES];
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| 86 |
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| 87 |
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| 88 | static void PrintGLerror(char *msg)
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| 89 | {
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| 90 | GLenum errCode;
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| 91 | const GLubyte *errStr;
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| 92 |
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| 93 | if ((errCode = glGetError()) != GL_NO_ERROR)
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| 94 | {
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| 95 | errStr = gluErrorString(errCode);
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| 96 | fprintf(stderr,"OpenGL ERROR: %s: %s\n", errStr, msg);
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| 97 | }
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| 98 | }
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| 99 |
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| 100 |
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| 101 | /** Generate poisson disc distributed sample points on the unit disc
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| 102 | */
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| 103 | static void GenerateSamples()
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| 104 | {
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| 105 | static PoissonDiscSampleGenerator poisson(NUM_SAMPLES, 1.0f);
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| 106 | poisson.Generate((Sample2 *)samples);
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| 107 | }
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| 108 |
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| 109 |
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[2879] | 110 | static void CreateNoiseTex2D(int w, int h)
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| 111 | {
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| 112 | //GLubyte *randomNormals = new GLubyte[mWidth * mHeight * 3];
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| 113 | float *randomNormals = new float[w * h * 3];
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| 114 |
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| 115 | for (int i = 0; i < w * h * 3; i += 3)
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| 116 | {
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| 117 | // create random samples on a circle
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| 118 | const float rx = RandomValue(0, 1);
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| 119 | const float theta = 2.0f * acos(sqrt(1.0f - rx));
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| 120 |
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| 121 | //randomNormals[i + 0] = (GLubyte)((cos(theta) * 0.5f + 0.5f) * 255.0f);
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| 122 | //randomNormals[i + 1] = (GLubyte)((sin(theta) * 0.5f + 0.5f) * 255.0f);
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| 123 | randomNormals[i + 0] = cos(theta);
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| 124 | randomNormals[i + 1] = sin(theta);
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| 125 | randomNormals[i + 2] = 0;
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| 126 | }
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| 127 |
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| 128 | glEnable(GL_TEXTURE_2D);
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| 129 | glGenTextures(1, &noiseTex);
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| 130 | glBindTexture(GL_TEXTURE_2D, noiseTex);
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| 131 |
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| 132 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
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| 133 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
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| 134 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
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| 135 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
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| 136 |
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[2884] | 137 | //glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB8, w, h, 0, GL_RGB, GL_UNSIGNED_BYTE, randomNormals);
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[2879] | 138 | glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA16F_ARB, w, h, 0, GL_RGB, GL_FLOAT, randomNormals);
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| 139 |
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| 140 | glBindTexture(GL_TEXTURE_2D, 0);
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| 141 | glDisable(GL_TEXTURE_2D);
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| 142 |
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| 143 | delete [] randomNormals;
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| 144 |
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| 145 | cout << "created noise texture" << endl;
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| 146 |
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| 147 | PrintGLerror("noisetexture");
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| 148 | }
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| 149 |
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| 150 |
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[2867] | 151 | SsaoShader::SsaoShader(int w, int h, Camera *cam, float scaleFactor):
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[2860] | 152 | mWidth(w), mHeight(h),
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| 153 | mCamera(cam),
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[2875] | 154 | mScaleFactor(scaleFactor),
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| 155 | mUseTemporalCoherence(true),
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| 156 | mUseGlobIllum(false)
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[2861] | 157 | {
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[2879] | 158 | // create noise texture for ssao
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| 159 | CreateNoiseTex2D(w, h);
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| 160 |
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[2861] | 161 | ///////////
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| 162 | //-- the flip-flop fbos
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[2859] | 163 |
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[2861] | 164 | mNewFbo = new FrameBufferObject(w, h, FrameBufferObject::DEPTH_NONE);
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[2880] | 165 |
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[2867] | 166 | mNewFbo->AddColorBuffer(ColorBufferObject::BUFFER_FLOAT_32, ColorBufferObject::WRAP_CLAMP_TO_EDGE, ColorBufferObject::FILTER_LINEAR, false);
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[2871] | 167 | mNewFbo->AddColorBuffer(ColorBufferObject::BUFFER_FLOAT_32, ColorBufferObject::WRAP_CLAMP_TO_EDGE, ColorBufferObject::FILTER_LINEAR, false);
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[2861] | 168 |
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[2881] | 169 |
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| 170 | ///////////////////////
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| 171 |
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[2861] | 172 | mOldFbo = new FrameBufferObject(w, h, FrameBufferObject::DEPTH_NONE);
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[2880] | 173 |
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[2867] | 174 | mOldFbo->AddColorBuffer(ColorBufferObject::BUFFER_FLOAT_32, ColorBufferObject::WRAP_CLAMP_TO_EDGE, ColorBufferObject::FILTER_LINEAR, false);
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[2871] | 175 | mOldFbo->AddColorBuffer(ColorBufferObject::BUFFER_FLOAT_32, ColorBufferObject::WRAP_CLAMP_TO_EDGE, ColorBufferObject::FILTER_LINEAR, false);
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[2861] | 176 |
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[2879] | 177 | //mFbo = new FrameBufferObject(w, h, FrameBufferObject::DEPTH_NONE);
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| 178 | //mFbo->AddColorBuffer(ColorBufferObject::BUFFER_FLOAT_32, ColorBufferObject::WRAP_CLAMP_TO_EDGE, ColorBufferObject::FILTER_LINEAR, false);*/
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[2861] | 179 | }
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| 180 |
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| 181 |
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| 182 | SsaoShader::~SsaoShader()
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| 183 | {
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[2879] | 184 | if (sCgSsaoProgram) cgDestroyProgram(sCgSsaoProgram);
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| 185 | if (sCgDeferredProgram) cgDestroyProgram(sCgDeferredProgram);
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| 186 | if (sCgSsaoProgram) cgDestroyProgram(sCgSsaoProgram);
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| 187 | if (sCgGiProgram) cgDestroyProgram(sCgGiProgram);
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| 188 | if (sCgAntiAliasingProgram) cgDestroyProgram(sCgAntiAliasingProgram);
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[2861] | 189 |
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| 190 | DEL_PTR(mNewFbo);
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| 191 | DEL_PTR(mOldFbo);
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[2879] | 192 | //DEL_PTR(mFbo);
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[2861] | 193 |
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| 194 | glDeleteTextures(1, &noiseTex);
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| 195 | }
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| 196 |
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| 197 |
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[2875] | 198 | void SsaoShader::SetUseGlobIllum(bool useGlobIllum)
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| 199 | {
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| 200 | mUseGlobIllum = useGlobIllum;
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| 201 | }
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| 202 |
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| 203 |
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| 204 | void SsaoShader::SetUseTemporalCoherence(bool temporal)
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| 205 | {
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| 206 | mUseTemporalCoherence = temporal;
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| 207 | }
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| 208 |
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| 209 |
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[2859] | 210 | void SsaoShader::Init(CGcontext context)
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[2861] | 211 | {
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[2873] | 212 | sCgDeferredProgram =
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[2868] | 213 | cgCreateProgramFromFile(context,
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| 214 | CG_SOURCE,
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| 215 | "src/shaders/deferred.cg",
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| 216 | RenderState::sCgFragmentProfile,
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[2873] | 217 | "main",
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[2868] | 218 | NULL);
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| 219 |
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[2873] | 220 | if (sCgDeferredProgram != NULL)
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[2868] | 221 | {
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[2873] | 222 | cgGLLoadProgram(sCgDeferredProgram);
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[2868] | 223 |
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| 224 | // we need size of texture for scaling
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[2873] | 225 | sPositionsTexDeferredParam = cgGetNamedParameter(sCgDeferredProgram, "positions");
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| 226 | sColorsTexDeferredParam = cgGetNamedParameter(sCgDeferredProgram, "colors");
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| 227 | sNormalsTexDeferredParam = cgGetNamedParameter(sCgDeferredProgram, "normals");
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[2868] | 228 | }
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| 229 | else
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| 230 | cerr << "deferred program failed to load" << endl;
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| 231 |
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| 232 |
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[2859] | 233 | ///////////////
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| 234 |
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| 235 | sCgSsaoProgram =
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| 236 | cgCreateProgramFromFile(context,
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| 237 | CG_SOURCE,
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[2868] | 238 | "src/shaders/ssao.cg",
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[2859] | 239 | RenderState::sCgFragmentProfile,
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[2868] | 240 | "main",
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[2859] | 241 | NULL);
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| 242 |
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| 243 | if (sCgSsaoProgram != NULL)
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| 244 | {
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| 245 | cgGLLoadProgram(sCgSsaoProgram);
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| 246 |
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| 247 | // we need size of texture for scaling
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| 248 | sPositionsTexParam = cgGetNamedParameter(sCgSsaoProgram, "positions");
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| 249 | sColorsTexParam = cgGetNamedParameter(sCgSsaoProgram, "colors");
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| 250 | sNormalsTexParam = cgGetNamedParameter(sCgSsaoProgram, "normals");
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| 251 | sNoiseTexParam = cgGetNamedParameter(sCgSsaoProgram, "noiseTexture");
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| 252 | sNoiseMultiplierParam = cgGetNamedParameter(sCgSsaoProgram, "noiseMultiplier");
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[2868] | 253 |
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[2859] | 254 | sOldModelViewProjMatrixParam = cgGetNamedParameter(sCgSsaoProgram, "oldModelViewProj");
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| 255 | sMaxDepthParam = cgGetNamedParameter(sCgSsaoProgram, "maxDepth");
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| 256 | sExpFactorParam = cgGetNamedParameter(sCgSsaoProgram, "expFactor");
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| 257 |
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| 258 | sOldTexParam = cgGetNamedParameter(sCgSsaoProgram, "oldTex");
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[2873] | 259 |
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[2884] | 260 | cgGLSetParameter1f(sNoiseMultiplierParam, RandomValue(3.0f, 17.0f));
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[2859] | 261 |
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| 262 | // generate samples for ssao kernel
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| 263 | GenerateSamples();
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[2875] | 264 |
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[2884] | 265 | sSamplesParam = cgGetNamedParameter(sCgSsaoProgram, "samples");
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| 266 | //cgSetArraySize(sSamplesParam, NUM_SAMPLES);
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| 267 | //cgCompileProgram(sCgSsaoProgram);
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| 268 |
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| 269 | cgGLSetParameterArray2f(sSamplesParam, 0, NUM_SAMPLES, (const float *)samples);
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[2859] | 270 | }
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| 271 | else
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| 272 | cerr << "ssao program failed to load" << endl;
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| 273 |
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[2873] | 274 | sCgGiProgram =
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| 275 | cgCreateProgramFromFile(context,
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| 276 | CG_SOURCE,
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| 277 | "src/shaders/globillum.cg",
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| 278 | RenderState::sCgFragmentProfile,
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| 279 | "main",
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| 280 | NULL);
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| 281 |
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| 282 | if (sCgGiProgram != NULL)
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| 283 | {
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| 284 | cgGLLoadProgram(sCgGiProgram);
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| 285 |
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| 286 | // we need size of texture for scaling
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| 287 | sPositionsTexGiParam = cgGetNamedParameter(sCgGiProgram, "positions");
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| 288 | sColorsTexGiParam = cgGetNamedParameter(sCgGiProgram, "colors");
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| 289 | sNormalsTexGiParam = cgGetNamedParameter(sCgGiProgram, "normals");
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| 290 | sNoiseTexGiParam = cgGetNamedParameter(sCgGiProgram, "noiseTexture");
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| 291 | sNoiseMultiplierGiParam = cgGetNamedParameter(sCgGiProgram, "noiseMultiplier");
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| 292 |
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[2874] | 293 | sOldModelViewProjMatrixGiParam = cgGetNamedParameter(sCgGiProgram, "oldModelViewProj");
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[2873] | 294 | sMaxDepthGiParam = cgGetNamedParameter(sCgGiProgram, "maxDepth");
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| 295 | sExpFactorGiParam = cgGetNamedParameter(sCgGiProgram, "expFactor");
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| 296 |
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| 297 | sSamplesGiParam = cgGetNamedParameter(sCgGiProgram, "samples");
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| 298 |
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| 299 | sOldSsaoTexGiParam = cgGetNamedParameter(sCgGiProgram, "oldSsaoTex");
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| 300 | sOldIllumTexGiParam = cgGetNamedParameter(sCgGiProgram, "oldIllumTex");
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| 301 |
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| 302 | // generate samples for ssao kernel
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| 303 | GenerateSamples();
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| 304 | cgGLSetParameterArray2f(sSamplesGiParam, 0, NUM_SAMPLES, (const float *)samples);
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[2875] | 305 |
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| 306 | cgGLSetParameter1f(sNoiseMultiplierGiParam, RandomValue(3.0f, 17.0f));
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[2873] | 307 | }
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| 308 | else
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| 309 | cerr << "globillum program failed to load" << endl;
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| 310 |
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[2880] | 311 | sCgCombinedIllumProgram =
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| 312 | cgCreateProgramFromFile(context,
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| 313 | CG_SOURCE,
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| 314 | "src/shaders/globillum.cg",
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| 315 | RenderState::sCgFragmentProfile,
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| 316 | "combine",
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| 317 | NULL);
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| 318 |
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| 319 | if (sCgCombinedIllumProgram != NULL)
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| 320 | {
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| 321 | cgGLLoadProgram(sCgCombinedIllumProgram);
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| 322 |
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| 323 | sColorsTexCombinedIllumParam = cgGetNamedParameter(sCgCombinedIllumProgram, "colors");
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| 324 | sSsaoTexCombinedIllumParam = cgGetNamedParameter(sCgCombinedIllumProgram, "ssaoTex");
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| 325 | sIllumTexCombinedIllumParam = cgGetNamedParameter(sCgCombinedIllumProgram, "illumTex");
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| 326 | }
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| 327 | else
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| 328 | cerr << "combined illum program failed to load" << endl;
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| 329 |
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| 330 |
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| 331 | sCgCombinedSsaoProgram =
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| 332 | cgCreateProgramFromFile(context,
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| 333 | CG_SOURCE,
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| 334 | "src/shaders/ssao.cg",
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| 335 | RenderState::sCgFragmentProfile,
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| 336 | "combine",
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| 337 | NULL);
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| 338 |
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| 339 | if (sCgCombinedSsaoProgram != NULL)
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| 340 | {
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| 341 | cgGLLoadProgram(sCgCombinedSsaoProgram);
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| 342 |
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| 343 | sColorsTexCombinedSsaoParam = cgGetNamedParameter(sCgCombinedSsaoProgram, "colors");
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| 344 | sSsaoTexCombinedSsaoParam = cgGetNamedParameter(sCgCombinedSsaoProgram, "ssaoTex");
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| 345 | }
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| 346 | else
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| 347 | cerr << "combied illum program failed to load" << endl;
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| 348 |
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| 349 |
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[2865] | 350 | sCgAntiAliasingProgram =
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| 351 | cgCreateProgramFromFile(context,
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| 352 | CG_SOURCE,
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| 353 | "src/shaders/antialiasing.cg",
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| 354 | RenderState::sCgFragmentProfile,
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| 355 | "main",
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| 356 | NULL);
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| 357 |
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| 358 | if (sCgAntiAliasingProgram != NULL)
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| 359 | {
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| 360 | cgGLLoadProgram(sCgAntiAliasingProgram);
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| 361 |
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| 362 | sColorsTexAntiAliasingParam = cgGetNamedParameter(sCgAntiAliasingProgram, "colors");
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| 363 | sNormalsTexAntiAliasingParam = cgGetNamedParameter(sCgAntiAliasingProgram, "normals");
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| 364 | }
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| 365 | else
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| 366 | cerr << "antialiasing program failed to load" << endl;
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| 367 |
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[2859] | 368 | PrintGLerror("init");
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| 369 | }
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| 370 |
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| 371 |
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[2861] | 372 | void SsaoShader::Render(FrameBufferObject *fbo,
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| 373 | const Matrix4x4 &oldProjViewMatrix,
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| 374 | float expFactor)
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[2859] | 375 | {
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[2868] | 376 |
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| 377 | // switch roles of old and new fbo
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| 378 | // the algorihm uses two input fbos, where the one
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| 379 | // contais the color buffer from the last frame,
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| 380 | // the other one will be written
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| 381 | swap(mNewFbo, mOldFbo);
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| 382 |
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| 383 | FrameBufferObject::Release();
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| 384 |
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[2867] | 385 | cgGLEnableProfile(RenderState::sCgFragmentProfile);
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| 386 |
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| 387 | glDisable(GL_ALPHA_TEST);
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| 388 | glDisable(GL_TEXTURE_2D);
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| 389 | glDisable(GL_LIGHTING);
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| 390 |
|
---|
[2880] | 391 | glPushAttrib(GL_VIEWPORT_BIT);
|
---|
| 392 | glViewport(0, 0, mWidth, mHeight);
|
---|
| 393 |
|
---|
[2867] | 394 | glMatrixMode(GL_PROJECTION);
|
---|
| 395 | glPushMatrix();
|
---|
| 396 | glLoadIdentity();
|
---|
| 397 |
|
---|
| 398 | glMatrixMode(GL_MODELVIEW);
|
---|
| 399 | glPushMatrix();
|
---|
| 400 | glLoadIdentity();
|
---|
| 401 |
|
---|
| 402 | const float offs = 0.5f;
|
---|
| 403 | glOrtho(-offs, offs, -offs, offs, 0, 1);
|
---|
| 404 |
|
---|
[2868] | 405 | FirstPass(fbo);
|
---|
[2873] | 406 |
|
---|
[2875] | 407 | if (!mUseGlobIllum)
|
---|
[2880] | 408 | {
|
---|
[2875] | 409 | ComputeSsao(fbo, expFactor, oldProjViewMatrix);
|
---|
[2880] | 410 | CombineSsao(fbo);
|
---|
| 411 | }
|
---|
[2875] | 412 | else
|
---|
[2880] | 413 | {
|
---|
[2875] | 414 | ComputeGlobIllum(fbo, expFactor, oldProjViewMatrix);
|
---|
[2880] | 415 | CombineIllum(fbo);
|
---|
| 416 | }
|
---|
[2884] | 417 |
|
---|
[2865] | 418 | AntiAliasing(fbo);
|
---|
[2867] | 419 |
|
---|
| 420 | glEnable(GL_LIGHTING);
|
---|
| 421 | glDisable(GL_TEXTURE_2D);
|
---|
| 422 |
|
---|
| 423 | glMatrixMode(GL_PROJECTION);
|
---|
| 424 | glPopMatrix();
|
---|
| 425 |
|
---|
| 426 | glMatrixMode(GL_MODELVIEW);
|
---|
| 427 | glPopMatrix();
|
---|
| 428 |
|
---|
| 429 | glPopAttrib();
|
---|
| 430 |
|
---|
| 431 | cgGLDisableProfile(RenderState::sCgFragmentProfile);
|
---|
[2859] | 432 | }
|
---|
| 433 |
|
---|
| 434 |
|
---|
[2874] | 435 | void SsaoShader::ComputeSsao(FrameBufferObject *fbo,
|
---|
| 436 | float expFactor,
|
---|
| 437 | const Matrix4x4 &oldProjViewMatrix
|
---|
| 438 | )
|
---|
[2859] | 439 | {
|
---|
[2874] | 440 | cgGLSetMatrixParameterfc(sOldModelViewProjMatrixParam, (const float *)oldProjViewMatrix.x);
|
---|
| 441 |
|
---|
[2879] | 442 | GLuint colorsTex = fbo->GetColorBuffer(3)->GetTexture();
|
---|
[2861] | 443 | GLuint positionsTex = fbo->GetColorBuffer(1)->GetTexture();
|
---|
| 444 | GLuint normalsTex = fbo->GetColorBuffer(2)->GetTexture();
|
---|
[2859] | 445 |
|
---|
[2867] | 446 | if (1)
|
---|
| 447 | {
|
---|
| 448 | // generate mip map levels for position texture
|
---|
| 449 | glBindTexture(GL_TEXTURE_2D, positionsTex);
|
---|
| 450 | glGenerateMipmapEXT(GL_TEXTURE_2D);
|
---|
| 451 | }
|
---|
| 452 |
|
---|
| 453 |
|
---|
[2861] | 454 | // read the second buffer, write to the first buffer
|
---|
| 455 | mNewFbo->Bind();
|
---|
[2880] | 456 | glDrawBuffers(1, mymrt);
|
---|
[2868] | 457 |
|
---|
[2880] | 458 |
|
---|
[2861] | 459 | GLuint oldTex = mOldFbo->GetColorBuffer(0)->GetTexture();
|
---|
[2860] | 460 |
|
---|
[2859] | 461 | glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
|
---|
| 462 |
|
---|
[2868] | 463 | cgGLEnableProfile(RenderState::sCgFragmentProfile);
|
---|
[2859] | 464 | cgGLBindProgram(sCgSsaoProgram);
|
---|
| 465 |
|
---|
| 466 | cgGLSetTextureParameter(sPositionsTexParam, positionsTex);
|
---|
| 467 | cgGLEnableTextureParameter(sPositionsTexParam);
|
---|
| 468 |
|
---|
| 469 | cgGLSetTextureParameter(sColorsTexParam, colorsTex);
|
---|
| 470 | cgGLEnableTextureParameter(sColorsTexParam);
|
---|
| 471 |
|
---|
| 472 | cgGLSetTextureParameter(sNormalsTexParam, normalsTex);
|
---|
| 473 | cgGLEnableTextureParameter(sNormalsTexParam);
|
---|
| 474 |
|
---|
| 475 | cgGLSetTextureParameter(sNoiseTexParam, noiseTex);
|
---|
| 476 | cgGLEnableTextureParameter(sNoiseTexParam);
|
---|
| 477 |
|
---|
| 478 | cgGLSetTextureParameter(sOldTexParam, oldTex);
|
---|
| 479 | cgGLEnableTextureParameter(sOldTexParam);
|
---|
| 480 |
|
---|
| 481 | cgGLSetParameter1f(sMaxDepthParam, mScaleFactor);
|
---|
[2875] | 482 |
|
---|
| 483 | if (mUseTemporalCoherence)
|
---|
| 484 | {
|
---|
| 485 | cgGLSetParameter1f(sNoiseMultiplierParam, RandomValue(3.0f, 17.0f));
|
---|
| 486 | cgGLSetParameter1f(sExpFactorParam, expFactor);
|
---|
[2859] | 487 |
|
---|
| 488 |
|
---|
[2875] | 489 | // q: should we generate new samples or only rotate the old ones?
|
---|
| 490 | // in the first case, the sample patterns look nicer, but the kernel
|
---|
| 491 | // needs longer to converge
|
---|
| 492 | GenerateSamples();
|
---|
| 493 | cgGLSetParameterArray2f(sSamplesParam, 0, NUM_SAMPLES, (const float *)samples);
|
---|
| 494 | }
|
---|
| 495 | else
|
---|
| 496 | {
|
---|
| 497 | cgGLSetParameter1f(sExpFactorParam, 1.0f);
|
---|
| 498 | }
|
---|
[2859] | 499 |
|
---|
| 500 | Vector3 tl, tr, bl, br;
|
---|
| 501 | ComputeViewVectors(tl, tr, bl, br);
|
---|
| 502 |
|
---|
| 503 | glColor3f(1.0f, 1.0f, 1.0f);
|
---|
| 504 |
|
---|
| 505 | glBegin(GL_QUADS);
|
---|
| 506 |
|
---|
| 507 | // note: slightly larger texture hides ambient occlusion error on border but costs resolution
|
---|
[2860] | 508 | //const float new_offs = 0.55f;
|
---|
| 509 | const float new_offs = 0.5f;
|
---|
| 510 |
|
---|
| 511 | glColor3f(bl.x, bl.y, bl.z); glTexCoord2f(0, 0); glVertex3f(-new_offs, -new_offs, -0.5f);
|
---|
| 512 | glColor3f(br.x, br.y, br.z); glTexCoord2f(1, 0); glVertex3f( new_offs, -new_offs, -0.5f);
|
---|
| 513 | glColor3f(tr.x, tr.y, tr.z); glTexCoord2f(1, 1); glVertex3f( new_offs, new_offs, -0.5f);
|
---|
| 514 | glColor3f(tl.x, tl.y, tl.z); glTexCoord2f(0, 1); glVertex3f(-new_offs, new_offs, -0.5f);
|
---|
[2859] | 515 |
|
---|
| 516 | glEnd();
|
---|
| 517 |
|
---|
[2860] | 518 | cgGLDisableTextureParameter(sColorsTexParam);
|
---|
| 519 | cgGLDisableTextureParameter(sPositionsTexParam);
|
---|
| 520 | cgGLDisableTextureParameter(sNormalsTexParam);
|
---|
| 521 | cgGLDisableTextureParameter(sNoiseTexParam);
|
---|
| 522 | cgGLDisableTextureParameter(sOldTexParam);
|
---|
[2859] | 523 |
|
---|
[2880] | 524 |
|
---|
[2861] | 525 | FrameBufferObject::Release();
|
---|
[2859] | 526 |
|
---|
| 527 | PrintGLerror("ssao first pass");
|
---|
| 528 | }
|
---|
| 529 |
|
---|
| 530 |
|
---|
[2860] | 531 | void SsaoShader::ComputeViewVectors(Vector3 &tl, Vector3 &tr, Vector3 &bl, Vector3 &br)
|
---|
| 532 | {
|
---|
| 533 | Vector3 ftl, ftr, fbl, fbr, ntl, ntr, nbl, nbr;
|
---|
[2859] | 534 |
|
---|
[2860] | 535 | mCamera->ComputePoints(ftl, ftr, fbl, fbr, ntl, ntr, nbl, nbr);
|
---|
| 536 |
|
---|
[2863] | 537 | #if 1 // matT: debug this!!
|
---|
[2860] | 538 |
|
---|
[2863] | 539 | bl = -Normalize(nbl - fbl);
|
---|
| 540 | br = -Normalize(nbr - fbr);
|
---|
| 541 | tl = -Normalize(ntl - ftl);
|
---|
| 542 | tr = -Normalize(ntr - ftr);
|
---|
[2860] | 543 |
|
---|
| 544 | #else // just take camera direction
|
---|
| 545 |
|
---|
| 546 | bl = -Normalize(mCamera->GetDirection());
|
---|
| 547 | br = -Normalize(mCamera->GetDirection());
|
---|
| 548 | tl = -Normalize(mCamera->GetDirection());
|
---|
| 549 | tr = -Normalize(mCamera->GetDirection());
|
---|
| 550 |
|
---|
| 551 | #endif
|
---|
| 552 |
|
---|
| 553 | // normalize to 0 .. 1
|
---|
| 554 | bl = bl * 0.5f + 0.5f;
|
---|
| 555 | br = br * 0.5f + 0.5f;
|
---|
| 556 | tl = tl * 0.5f + 0.5f;
|
---|
| 557 | tr = tr * 0.5f + 0.5f;
|
---|
| 558 | }
|
---|
| 559 |
|
---|
| 560 |
|
---|
| 561 |
|
---|
[2865] | 562 | static void SetVertex(float x, float y, float x_offs, float y_offs)
|
---|
| 563 | {
|
---|
| 564 | glMultiTexCoord2fARB(GL_TEXTURE0_ARB, x, y); // center
|
---|
| 565 | glMultiTexCoord2fARB(GL_TEXTURE1_ARB, x - x_offs, y + y_offs); // left top
|
---|
| 566 | glMultiTexCoord2fARB(GL_TEXTURE2_ARB, x + x_offs, y - y_offs); // right bottom
|
---|
| 567 | glMultiTexCoord2fARB(GL_TEXTURE3_ARB, x + x_offs, y + y_offs); // right top
|
---|
| 568 | glMultiTexCoord2fARB(GL_TEXTURE4_ARB, x - x_offs, y - y_offs); // left bottom
|
---|
| 569 |
|
---|
| 570 | glMultiTexCoord4fARB(GL_TEXTURE5_ARB, x - x_offs, y, x + x_offs, y); // left right
|
---|
| 571 | glMultiTexCoord4fARB(GL_TEXTURE6_ARB, x, y + y_offs, x, y - y_offs); // top bottom
|
---|
| 572 |
|
---|
| 573 | glVertex3f(x - 0.5f, y - 0.5f, -0.5f);
|
---|
| 574 | }
|
---|
| 575 |
|
---|
| 576 |
|
---|
| 577 | void SsaoShader::AntiAliasing(FrameBufferObject *fbo)
|
---|
| 578 | {
|
---|
[2880] | 579 | GLuint colorsTex = fbo->GetColorBuffer(0)->GetTexture();
|
---|
[2865] | 580 | GLuint normalsTex = fbo->GetColorBuffer(2)->GetTexture();
|
---|
| 581 |
|
---|
| 582 | glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
|
---|
| 583 |
|
---|
| 584 | cgGLEnableProfile(RenderState::sCgFragmentProfile);
|
---|
| 585 | cgGLBindProgram(sCgAntiAliasingProgram);
|
---|
[2868] | 586 |
|
---|
[2865] | 587 | cgGLSetTextureParameter(sColorsTexAntiAliasingParam, colorsTex);
|
---|
| 588 | cgGLEnableTextureParameter(sColorsTexAntiAliasingParam);
|
---|
| 589 |
|
---|
| 590 | cgGLSetTextureParameter(sNormalsTexAntiAliasingParam, normalsTex);
|
---|
| 591 | cgGLEnableTextureParameter(sNormalsTexAntiAliasingParam);
|
---|
[2868] | 592 |
|
---|
[2865] | 593 | glColor3f(1.0f, 1.0f, 1.0f);
|
---|
| 594 |
|
---|
| 595 | float offs2 = 0.5f;
|
---|
| 596 |
|
---|
| 597 | glBegin(GL_QUADS);
|
---|
| 598 |
|
---|
| 599 | // the neighbouring texels
|
---|
| 600 | float x_offs = 1.0f / mWidth;
|
---|
| 601 | float y_offs = 1.0f / mHeight;
|
---|
| 602 |
|
---|
| 603 | SetVertex(0, 0, x_offs, y_offs);
|
---|
| 604 | SetVertex(1, 0, x_offs, y_offs);
|
---|
| 605 | SetVertex(1, 1, x_offs, y_offs);
|
---|
| 606 | SetVertex(0, 1, x_offs, y_offs);
|
---|
| 607 |
|
---|
| 608 | glEnd();
|
---|
| 609 |
|
---|
| 610 | cgGLDisableTextureParameter(sColorsTexAntiAliasingParam);
|
---|
| 611 | cgGLDisableTextureParameter(sNormalsTexAntiAliasingParam);
|
---|
| 612 |
|
---|
[2867] | 613 | PrintGLerror("antialiasing");
|
---|
[2865] | 614 | }
|
---|
| 615 |
|
---|
| 616 |
|
---|
[2868] | 617 | void SsaoShader::FirstPass(FrameBufferObject *fbo)
|
---|
| 618 | {
|
---|
| 619 | GLuint colorsTex = fbo->GetColorBuffer(0)->GetTexture();
|
---|
| 620 | GLuint positionsTex = fbo->GetColorBuffer(1)->GetTexture();
|
---|
| 621 | GLuint normalsTex = fbo->GetColorBuffer(2)->GetTexture();
|
---|
| 622 |
|
---|
[2879] | 623 | fbo->Bind();
|
---|
[2868] | 624 |
|
---|
[2879] | 625 | glDrawBuffers(1, mymrt + 3);
|
---|
| 626 |
|
---|
[2868] | 627 | glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
|
---|
| 628 |
|
---|
| 629 | cgGLEnableProfile(RenderState::sCgFragmentProfile);
|
---|
| 630 |
|
---|
[2873] | 631 | cgGLBindProgram(sCgDeferredProgram);
|
---|
[2868] | 632 |
|
---|
| 633 | cgGLSetTextureParameter(sColorsTexDeferredParam, colorsTex);
|
---|
| 634 | cgGLEnableTextureParameter(sColorsTexDeferredParam);
|
---|
| 635 |
|
---|
| 636 | cgGLSetTextureParameter(sPositionsTexDeferredParam, positionsTex);
|
---|
| 637 | cgGLEnableTextureParameter(sPositionsTexDeferredParam);
|
---|
| 638 |
|
---|
| 639 | cgGLSetTextureParameter(sNormalsTexDeferredParam, normalsTex);
|
---|
| 640 | cgGLEnableTextureParameter(sNormalsTexDeferredParam);
|
---|
| 641 |
|
---|
| 642 | glColor3f(1.0f, 1.0f, 1.0f);
|
---|
| 643 |
|
---|
| 644 | const float offs = 0.5f;
|
---|
| 645 |
|
---|
| 646 | glBegin(GL_QUADS);
|
---|
| 647 |
|
---|
| 648 | glTexCoord2f(0, 0); glVertex3f(-offs, -offs, -0.5f);
|
---|
| 649 | glTexCoord2f(1, 0); glVertex3f( offs, -offs, -0.5f);
|
---|
| 650 | glTexCoord2f(1, 1); glVertex3f( offs, offs, -0.5f);
|
---|
| 651 | glTexCoord2f(0, 1); glVertex3f(-offs, offs, -0.5f);
|
---|
| 652 |
|
---|
| 653 | glEnd();
|
---|
| 654 |
|
---|
| 655 | cgGLDisableTextureParameter(sColorsTexDeferredParam);
|
---|
| 656 | cgGLDisableTextureParameter(sPositionsTexDeferredParam);
|
---|
| 657 | cgGLDisableTextureParameter(sNormalsTexDeferredParam);
|
---|
| 658 |
|
---|
| 659 | cgGLDisableProfile(RenderState::sCgFragmentProfile);
|
---|
| 660 |
|
---|
| 661 | FrameBufferObject::Release();
|
---|
| 662 |
|
---|
| 663 | PrintGLerror("deferred shading");
|
---|
| 664 | }
|
---|
| 665 |
|
---|
[2869] | 666 |
|
---|
[2874] | 667 | void SsaoShader::ComputeGlobIllum(FrameBufferObject *fbo,
|
---|
| 668 | float expFactor,
|
---|
| 669 | const Matrix4x4 &oldProjViewMatrix
|
---|
| 670 | )
|
---|
[2869] | 671 | {
|
---|
[2874] | 672 | cgGLSetMatrixParameterfc(sOldModelViewProjMatrixGiParam, (const float *)oldProjViewMatrix.x);
|
---|
| 673 |
|
---|
[2879] | 674 | //GLuint colorsTex = mFbo->GetColorBuffer(0)->GetTexture();
|
---|
| 675 | GLuint colorsTex = fbo->GetColorBuffer(3)->GetTexture();
|
---|
[2873] | 676 | GLuint positionsTex = fbo->GetColorBuffer(1)->GetTexture();
|
---|
| 677 | GLuint normalsTex = fbo->GetColorBuffer(2)->GetTexture();
|
---|
[2869] | 678 |
|
---|
[2873] | 679 | if (1)
|
---|
| 680 | {
|
---|
| 681 | // generate mip map levels for position texture
|
---|
| 682 | glBindTexture(GL_TEXTURE_2D, positionsTex);
|
---|
| 683 | glGenerateMipmapEXT(GL_TEXTURE_2D);
|
---|
[2869] | 684 |
|
---|
[2873] | 685 | // generate mip map levels for position texture
|
---|
| 686 | glBindTexture(GL_TEXTURE_2D, colorsTex);
|
---|
| 687 | glGenerateMipmapEXT(GL_TEXTURE_2D);
|
---|
| 688 | }
|
---|
| 689 |
|
---|
| 690 |
|
---|
| 691 | // read the second buffer, write to the first buffer
|
---|
| 692 | mNewFbo->Bind();
|
---|
[2880] | 693 | glDrawBuffers(2, mymrt);
|
---|
[2873] | 694 |
|
---|
| 695 | GLuint oldSsaoTex = mOldFbo->GetColorBuffer(0)->GetTexture();
|
---|
[2880] | 696 | GLuint oldIllumTex = mOldFbo->GetColorBuffer(1)->GetTexture();
|
---|
[2873] | 697 |
|
---|
[2869] | 698 | glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
|
---|
| 699 |
|
---|
| 700 | cgGLEnableProfile(RenderState::sCgFragmentProfile);
|
---|
[2873] | 701 | cgGLBindProgram(sCgGiProgram);
|
---|
[2869] | 702 |
|
---|
[2873] | 703 | cgGLSetTextureParameter(sPositionsTexGiParam, positionsTex);
|
---|
| 704 | cgGLEnableTextureParameter(sPositionsTexGiParam);
|
---|
[2869] | 705 |
|
---|
[2873] | 706 | cgGLSetTextureParameter(sColorsTexGiParam, colorsTex);
|
---|
| 707 | cgGLEnableTextureParameter(sColorsTexGiParam);
|
---|
[2869] | 708 |
|
---|
[2873] | 709 | cgGLSetTextureParameter(sNormalsTexGiParam, normalsTex);
|
---|
| 710 | cgGLEnableTextureParameter(sNormalsTexGiParam);
|
---|
[2869] | 711 |
|
---|
[2873] | 712 | cgGLSetTextureParameter(sNoiseTexGiParam, noiseTex);
|
---|
| 713 | cgGLEnableTextureParameter(sNoiseTexGiParam);
|
---|
| 714 |
|
---|
| 715 | cgGLSetTextureParameter(sOldSsaoTexGiParam, oldSsaoTex);
|
---|
| 716 | cgGLEnableTextureParameter(sOldSsaoTexGiParam);
|
---|
| 717 |
|
---|
| 718 | cgGLSetTextureParameter(sOldIllumTexGiParam, oldIllumTex);
|
---|
| 719 | cgGLEnableTextureParameter(sOldIllumTexGiParam);
|
---|
| 720 |
|
---|
| 721 | cgGLSetParameter1f(sMaxDepthGiParam, mScaleFactor);
|
---|
| 722 |
|
---|
| 723 |
|
---|
[2875] | 724 | if (mUseTemporalCoherence)
|
---|
| 725 | {
|
---|
| 726 | cgGLSetParameter1f(sNoiseMultiplierGiParam, RandomValue(3.0f, 17.0f));
|
---|
| 727 | cgGLSetParameter1f(sExpFactorGiParam, expFactor);
|
---|
[2873] | 728 |
|
---|
[2875] | 729 | // q: should we generate new samples or only rotate the old ones?
|
---|
| 730 | // in the first case, the sample patterns look nicer, but the kernel
|
---|
| 731 | // needs longer to converge
|
---|
| 732 | GenerateSamples();
|
---|
| 733 | cgGLSetParameterArray2f(sSamplesGiParam, 0, NUM_SAMPLES, (const float *)samples);
|
---|
| 734 | }
|
---|
| 735 | else
|
---|
| 736 | {
|
---|
| 737 | cgGLSetParameter1f(sExpFactorGiParam, 1.0f);
|
---|
| 738 | }
|
---|
| 739 |
|
---|
[2873] | 740 | Vector3 tl, tr, bl, br;
|
---|
| 741 | ComputeViewVectors(tl, tr, bl, br);
|
---|
| 742 |
|
---|
[2869] | 743 | glColor3f(1.0f, 1.0f, 1.0f);
|
---|
| 744 |
|
---|
| 745 | glBegin(GL_QUADS);
|
---|
| 746 |
|
---|
[2873] | 747 | // note: slightly larger texture hides ambient occlusion error on border but costs resolution
|
---|
| 748 | //const float new_offs = 0.55f;
|
---|
| 749 | const float new_offs = 0.5f;
|
---|
| 750 |
|
---|
| 751 | glColor3f(bl.x, bl.y, bl.z); glTexCoord2f(0, 0); glVertex3f(-new_offs, -new_offs, -0.5f);
|
---|
| 752 | glColor3f(br.x, br.y, br.z); glTexCoord2f(1, 0); glVertex3f( new_offs, -new_offs, -0.5f);
|
---|
| 753 | glColor3f(tr.x, tr.y, tr.z); glTexCoord2f(1, 1); glVertex3f( new_offs, new_offs, -0.5f);
|
---|
| 754 | glColor3f(tl.x, tl.y, tl.z); glTexCoord2f(0, 1); glVertex3f(-new_offs, new_offs, -0.5f);
|
---|
[2869] | 755 |
|
---|
| 756 | glEnd();
|
---|
| 757 |
|
---|
[2873] | 758 | cgGLDisableTextureParameter(sColorsTexGiParam);
|
---|
| 759 | cgGLDisableTextureParameter(sPositionsTexGiParam);
|
---|
| 760 | cgGLDisableTextureParameter(sNormalsTexGiParam);
|
---|
| 761 | cgGLDisableTextureParameter(sNoiseTexGiParam);
|
---|
| 762 | cgGLDisableTextureParameter(sOldSsaoTexGiParam);
|
---|
| 763 | cgGLDisableTextureParameter(sOldIllumTexGiParam);
|
---|
[2869] | 764 |
|
---|
| 765 | FrameBufferObject::Release();
|
---|
| 766 |
|
---|
[2873] | 767 | PrintGLerror("globillum first pass");
|
---|
[2869] | 768 | }
|
---|
| 769 |
|
---|
| 770 |
|
---|
[2880] | 771 | void SsaoShader::CombineIllum(FrameBufferObject *fbo)
|
---|
| 772 | {
|
---|
| 773 | GLuint colorsTex = fbo->GetColorBuffer(3)->GetTexture();
|
---|
[2884] | 774 |
|
---|
[2880] | 775 | GLuint ssaoTex = mNewFbo->GetColorBuffer(0)->GetTexture();
|
---|
| 776 | GLuint illumTex = mNewFbo->GetColorBuffer(1)->GetTexture();
|
---|
| 777 |
|
---|
| 778 | fbo->Bind();
|
---|
| 779 |
|
---|
[2884] | 780 | // overwrite old color texture
|
---|
[2880] | 781 | glDrawBuffers(1, mymrt);
|
---|
| 782 |
|
---|
| 783 | cgGLEnableProfile(RenderState::sCgFragmentProfile);
|
---|
| 784 |
|
---|
| 785 | cgGLBindProgram(sCgCombinedIllumProgram);
|
---|
| 786 |
|
---|
[2881] | 787 | glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
|
---|
| 788 |
|
---|
| 789 |
|
---|
[2880] | 790 | cgGLSetTextureParameter(sColorsTexCombinedIllumParam, colorsTex);
|
---|
| 791 | cgGLEnableTextureParameter(sColorsTexCombinedIllumParam);
|
---|
| 792 |
|
---|
| 793 | cgGLSetTextureParameter(sSsaoTexCombinedIllumParam, ssaoTex);
|
---|
| 794 | cgGLEnableTextureParameter(sSsaoTexCombinedIllumParam);
|
---|
| 795 |
|
---|
| 796 | cgGLSetTextureParameter(sIllumTexCombinedIllumParam, illumTex);
|
---|
| 797 | cgGLEnableTextureParameter(sIllumTexCombinedIllumParam);
|
---|
| 798 |
|
---|
| 799 | glColor3f(1.0f, 1.0f, 1.0f);
|
---|
| 800 |
|
---|
| 801 | const float offs = 0.5f;
|
---|
| 802 |
|
---|
| 803 | glBegin(GL_QUADS);
|
---|
| 804 |
|
---|
| 805 | glTexCoord2f(0, 0); glVertex3f(-offs, -offs, -0.5f);
|
---|
| 806 | glTexCoord2f(1, 0); glVertex3f( offs, -offs, -0.5f);
|
---|
| 807 | glTexCoord2f(1, 1); glVertex3f( offs, offs, -0.5f);
|
---|
| 808 | glTexCoord2f(0, 1); glVertex3f(-offs, offs, -0.5f);
|
---|
| 809 |
|
---|
| 810 | glEnd();
|
---|
| 811 |
|
---|
| 812 | cgGLDisableTextureParameter(sColorsTexCombinedIllumParam);
|
---|
| 813 | cgGLDisableTextureParameter(sSsaoTexCombinedIllumParam);
|
---|
| 814 | cgGLDisableTextureParameter(sIllumTexCombinedIllumParam);
|
---|
| 815 |
|
---|
| 816 | cgGLDisableProfile(RenderState::sCgFragmentProfile);
|
---|
| 817 |
|
---|
| 818 | FrameBufferObject::Release();
|
---|
| 819 |
|
---|
| 820 | PrintGLerror("combine");
|
---|
| 821 | }
|
---|
| 822 |
|
---|
| 823 |
|
---|
| 824 | void SsaoShader::CombineSsao(FrameBufferObject *fbo)
|
---|
| 825 | {
|
---|
| 826 | GLuint colorsTex = fbo->GetColorBuffer(3)->GetTexture();
|
---|
| 827 | GLuint ssaoTex = mNewFbo->GetColorBuffer(0)->GetTexture();
|
---|
| 828 |
|
---|
| 829 | fbo->Bind();
|
---|
| 830 |
|
---|
| 831 | // write into old color texture (not needed anymore)
|
---|
| 832 | glDrawBuffers(1, mymrt);
|
---|
| 833 |
|
---|
| 834 | glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
|
---|
| 835 |
|
---|
| 836 | cgGLEnableProfile(RenderState::sCgFragmentProfile);
|
---|
| 837 |
|
---|
| 838 | cgGLBindProgram(sCgCombinedSsaoProgram);
|
---|
| 839 |
|
---|
| 840 | cgGLSetTextureParameter(sColorsTexCombinedSsaoParam, colorsTex);
|
---|
| 841 | cgGLEnableTextureParameter(sColorsTexCombinedSsaoParam);
|
---|
| 842 |
|
---|
| 843 | cgGLSetTextureParameter(sSsaoTexCombinedSsaoParam, ssaoTex);
|
---|
| 844 | cgGLEnableTextureParameter(sSsaoTexCombinedSsaoParam);
|
---|
| 845 |
|
---|
| 846 |
|
---|
| 847 | glColor3f(1.0f, 1.0f, 1.0f);
|
---|
| 848 |
|
---|
| 849 | const float offs = 0.5f;
|
---|
| 850 |
|
---|
| 851 | glBegin(GL_QUADS);
|
---|
| 852 |
|
---|
| 853 | glTexCoord2f(0, 0); glVertex3f(-offs, -offs, -0.5f);
|
---|
| 854 | glTexCoord2f(1, 0); glVertex3f( offs, -offs, -0.5f);
|
---|
| 855 | glTexCoord2f(1, 1); glVertex3f( offs, offs, -0.5f);
|
---|
| 856 | glTexCoord2f(0, 1); glVertex3f(-offs, offs, -0.5f);
|
---|
| 857 |
|
---|
| 858 | glEnd();
|
---|
| 859 |
|
---|
| 860 | cgGLDisableTextureParameter(sColorsTexCombinedSsaoParam);
|
---|
| 861 | cgGLDisableTextureParameter(sSsaoTexCombinedSsaoParam);
|
---|
| 862 |
|
---|
| 863 | cgGLDisableProfile(RenderState::sCgFragmentProfile);
|
---|
| 864 |
|
---|
| 865 | FrameBufferObject::Release();
|
---|
| 866 |
|
---|
| 867 | PrintGLerror("combine ssao");
|
---|
| 868 | }
|
---|
| 869 |
|
---|
| 870 |
|
---|
| 871 |
|
---|
[2858] | 872 | } // namespace
|
---|