Changeset 3167 for GTP/trunk/App/Demos/Vis/FriendlyCulling

Timestamp:

11/25/08 18:14:48 (16 years ago)

Author:

mattausch

Message:

 

Location:

GTP/trunk/App/Demos/Vis/FriendlyCulling/src

Files:

• DeferredRenderer.cpp (modified) (11 diffs)
• DeferredRenderer.h (modified) (1 diff)
• chcdemo.cpp (modified) (1 diff)
• shaderenv.h (modified) (3 diffs)
• shaders/antialiasing.cg (modified) (1 diff)
• shaders/combineSsao.cg (modified) (9 diffs)
• shaders/deferred.cg (modified) (7 diffs)
• shaders/ssao.cg (modified) (2 diffs)
• shaders/ssao3d.cg (modified) (1 diff)

GTP/trunk/App/Demos/Vis/FriendlyCulling/src/DeferredRenderer.cpp

@@ -71 +71 @@
 
 
-static float ssaoFilterOffsets[NUM_SSAO_FILTERSAMPLES * 2];
-static float ssaoFilterWeights[NUM_SSAO_FILTERSAMPLES];
+static float ssaoFilterOffsets[NUM_SSAO_FILTER_SAMPLES * 2];
+static float ssaoFilterWeights[NUM_SSAO_FILTER_SAMPLES];
 
 
@@ -445 +445 @@
         
         string prepareSsaoParams[] = 
-                {"colorsTex", "oldTex", "oldEyePos", "modelViewProj", "oldModelViewProj",
-                 "oldbl", "oldbr", "oldtl", "oldtr", "diffVals"};
-
-        sCgPrepareSsaoProgram->AddParameters(prepareSsaoParams, 0, 10);
+                {"colorsTex", "normalsTex", "diffVals", "oldTex", 
+                 "oldEyePos", "modelViewProj", "oldModelViewProj",
+                 "oldbl", "oldbr", "oldtl", "oldtr"};
+
+        sCgPrepareSsaoProgram->AddParameters(prepareSsaoParams, 0, 11);
 
 
         ////////////////
 
-
-        //const float filterWidth = 100.0f;
-        const float filterWidth = 30.0f;
-        //const float filterWidth = 15.0f;
-
-        PoissonDiscSampleGenerator2 poisson(NUM_SSAO_FILTERSAMPLES, 1.0f);
+        const float filterWidth = 1.0f;
+
+        PoissonDiscSampleGenerator2 poisson(NUM_SSAO_FILTER_SAMPLES, 1.0f);
         poisson.Generate((float *)ssaoFilterOffsets);
 
@@ -464 +462 @@
         const float yoffs = (float)filterWidth / mHeight;
 
-        for (int i = 0; i < NUM_SSAO_FILTERSAMPLES; ++ i)
+        for (int i = 0; i < NUM_SSAO_FILTER_SAMPLES; ++ i)
         {
                 float x = ssaoFilterOffsets[2 * i + 0];
@@ -516 +514 @@
                 //DownSample(fbo, colorBufferIdx, mDownSampleFbo, 0, sCgScaleDepthProgram);
                 PrepareSsao(fbo);
-                DownSample(fbo, 1, mDownSampleFbo, 1, sCgDownSampleProgram); // normals
-                DownSample(fbo, 2, mDownSampleFbo, 2, sCgDownSampleProgram); // offsets
+                //DownSample(fbo, 1, mDownSampleFbo, 1, sCgDownSampleProgram); // normals
+                //DownSample(fbo, 2, mDownSampleFbo, 2, sCgDownSampleProgram); // offsets
         }
 
@@ -570 +568 @@
 
 
+
+static inline float SqrMag(const Sample2 &s)
+{
+        return (s.x * s.x + s.y * s.y);
+}
+
+
+static inline float SqrDist(const Sample2 &a, const Sample2 &b)
+{
+        float x = a.x - b.x;
+        float y = a.y - b.y;
+        
+        return x * x + y * y;
+}
+
+
+static inline bool lt(const Sample2 &a, const Sample2 &b)
+{
+        return SqrMag(a) < SqrMag(b);
+}
+
+
+void DeferredRenderer::SortSamples()
+{
+        //for (int i = 0; i < NUM_SAMPLES; ++ i)cout << SqrDist(samples2[i-1], samples2[i]) << "|";
+        float dist = 0;
+        for (int i = 1; i < NUM_SAMPLES; ++ i)
+                dist += SqrDist(samples2[i-1], samples2[i]);
+                //cout << samples2[i].x << " " << samples2[i].y 
+
+        //cout << "\nbefore: " << dist << endl;
+
+        //sort(samples2, samples2 + sizeof(samples2) / sizeof(Sample2), lt2);
+
+
+        static Sample2 tempSamples[NUM_SAMPLES];
+        static bool checked[NUM_SAMPLES];
+
+        for (int i = 0; i < NUM_SAMPLES; ++ i)
+                checked[i] = false;
+
+        Sample2 currentSample;
+        currentSample.x = 0; currentSample.y = 0;
+        int ns = 0; // the next sample index
+
+        for (int i = 0; i < NUM_SAMPLES; ++ i)
+        {
+                float minLen = 1e20f;
+
+                for (int j = 0; j < NUM_SAMPLES; ++ j)
+                {
+                        if (checked[j]) continue;
+
+                        Sample2 s = samples2[j];
+                        const float len = SqrDist(s, currentSample);
+
+                        if (len < minLen) 
+                        {
+                                minLen = len;
+                                ns = j;
+                        }
+                }
+
+                tempSamples[i] = samples2[ns];
+                currentSample = samples2[ns];
+                checked[ns] = true;
+        }
+
+        for (int i = 0; i < NUM_SAMPLES; ++ i)
+                samples2[i] = tempSamples[i];
+
+        dist = 0;
+        for (int i = 1; i < NUM_SAMPLES; ++ i)
+                dist += SqrDist(samples2[i-1], samples2[i]);
+                //cout << samples2[i].x << " " << samples2[i].y << " " << SqrDist(samples2[i-1], samples2[i]) << "|";
+
+        //cout << "after:  " << dist << endl;
+}
+
+
 void DeferredRenderer::ComputeSsao(FrameBufferObject *fbo, 
                                                                    float tempCohFactor)
@@ -616 +694 @@
                 // needs longer to converge
                 GenerateSamples(mSamplingMethod);
+
+                SortSamples();
                 sCgSsaoProgram->SetArray2f(i, (float *)samples2, NUM_SAMPLES);
         }
@@ -821 +901 @@
         sCgCombineSsaoProgram->SetTexture(i ++, ssaoTex);
 
-        sCgCombineSsaoProgram->SetArray2f(i ++, (float *)ssaoFilterOffsets, NUM_SSAO_FILTERSAMPLES);
-        sCgCombineSsaoProgram->SetArray1f(i ++, (float *)ssaoFilterWeights, NUM_SSAO_FILTERSAMPLES);
+        sCgCombineSsaoProgram->SetArray2f(i ++, (float *)ssaoFilterOffsets, NUM_SSAO_FILTER_SAMPLES);
+        sCgCombineSsaoProgram->SetArray1f(i ++, (float *)ssaoFilterWeights, NUM_SSAO_FILTER_SAMPLES);
         
         sCgCombineSsaoProgram->SetMatrix(i++, mProjViewMatrix);
@@ -957 +1037 @@
 void DeferredRenderer::PrepareSsao(FrameBufferObject *fbo)
 {
-        GLuint colorsTex, diffVals, oldTex;
+        GLuint colorsTex, normalsTex, diffVals, oldTex;
 
         colorsTex = fbo->GetColorBuffer(colorBufferIdx)->GetTexture();
-        //normalsTex = fbo->GetColorBuffer(1)->GetTexture();
+        normalsTex = fbo->GetColorBuffer(1)->GetTexture();
         diffVals = fbo->GetColorBuffer(2)->GetTexture();
         //diffVals = mDownSampleFbo->GetColorBuffer(2)->GetTexture();
@@ -970 +1050 @@
 
         sCgPrepareSsaoProgram->SetTexture(i ++, colorsTex);
-        //sCgSsaoProgram->SetTexture(i ++, normalsTex);
+        sCgPrepareSsaoProgram->SetTexture(i ++, normalsTex);
+        sCgPrepareSsaoProgram->SetTexture(i ++, diffVals);
         sCgPrepareSsaoProgram->SetTexture(i ++, oldTex);
 
@@ -986 +1067 @@
                 sCgPrepareSsaoProgram->SetValue3f(i, mOldCornersView[j].x, mOldCornersView[j].y, mOldCornersView[j].z);
 
-        sCgPrepareSsaoProgram->SetTexture(i ++, diffVals);
-
-
         glPushAttrib(GL_VIEWPORT_BIT);
         glViewport(0, 0, mDownSampleFbo->GetWidth(), mDownSampleFbo->GetHeight());
@@ -994 +1072 @@
         mDownSampleFbo->Bind();
 
-        glDrawBuffers(1, mrt + 0);
+        glDrawBuffers(3, mrt + 0);
 
         DrawQuad(sCgPrepareSsaoProgram);

GTP/trunk/App/Demos/Vis/FriendlyCulling/src/DeferredRenderer.h

@@ -109 +109 @@
         void PrepareSsao(FrameBufferObject *fbo);
 
+        void SortSamples();
 
 

GTP/trunk/App/Demos/Vis/FriendlyCulling/src/chcdemo.cpp

@@ -587 +587 @@
         //fbo->AddColorBuffer(ColorBufferObject::RGB_UBYTE, ColorBufferObject::WRAP_CLAMP_TO_EDGE, ColorBufferObject::FILTER_NEAREST);
         // buffer holding the difference vector to the old frame
-        fbo->AddColorBuffer(ColorBufferObject::RGB_FLOAT_32, ColorBufferObject::WRAP_CLAMP_TO_EDGE, ColorBufferObject::FILTER_NEAREST);
+        fbo->AddColorBuffer(ColorBufferObject::RGB_FLOAT_16, ColorBufferObject::WRAP_CLAMP_TO_EDGE, ColorBufferObject::FILTER_LINEAR);
         // another color buffer
         fbo->AddColorBuffer(ColorBufferObject::RGBA_FLOAT_32, ColorBufferObject::WRAP_CLAMP_TO_EDGE, ColorBufferObject::FILTER_LINEAR, ColorBufferObject::FILTER_NEAREST);

GTP/trunk/App/Demos/Vis/FriendlyCulling/src/shaderenv.h

@@ -6 +6 @@
 //-- ssao + gi parameters
 
-//#define NUM_SAMPLES 8
-#define NUM_SAMPLES 24
+#define NUM_SAMPLES 8
+//#define NUM_SAMPLES 24
 
 // for quadratic falloff
 //#define SAMPLE_INTENSITY 0.2f
-//#define SAMPLE_INTENSITY 0.07f
-#define SAMPLE_INTENSITY 0.01f
+#define SAMPLE_INTENSITY 0.07f
+//#define SAMPLE_INTENSITY 0.01f
 
 //#define SAMPLE_INTENSITY 0.075f
@@ -27 +27 @@
 
 #define VIEW_CORRECTION_SCALE 1.0f
+
+//#define NUM_SSAO_FILTERSAMPLES 80
+#define NUM_SSAO_FILTER_SAMPLES 16
+#define NUM_SSAO_FILTER_WIDTH 10.0f
+#define SSAO_CONVERGENCE_WEIGHT 25.0f
 
 
@@ -60 +65 @@
 #define NUM_DOWNSAMPLES 9
 
-//#define NUM_SSAO_FILTERSAMPLES 25
-//#define NUM_SSAO_FILTERSAMPLES 50
-//#define NUM_SSAO_FILTERSAMPLES 80
-#define NUM_SSAO_FILTERSAMPLES 80
-
 
 #define DYNAMIC_OBJECTS_THRESHOLD 1e-8f

GTP/trunk/App/Demos/Vis/FriendlyCulling/src/shaders/antialiasing.cg

@@ -91 +91 @@
 
 
-        //float4 col = (s0 + s1 + s2 + s3 + centerColor) * 0.2f;
-        float4 col = (s0 + s1 + s2 + s3) * 0.25f;
+        float4 col = (s0 + s1 + s2 + s3 + centerColor) * 0.2f;
+        //float4 col = (s0 + s1 + s2 + s3) * 0.25f;
         //float4 col = float4(ne.x, ne.x, ne.x, 0);
         //float4 col = float4(de.x, de.x, de.x, 0);

GTP/trunk/App/Demos/Vis/FriendlyCulling/src/shaders/combineSsao.cg

@@ -30 +30 @@
                                                   uniform sampler2D normalsTex,
                                                   uniform sampler2D colorsTex,
-                                                  uniform float2 filterOffs[NUM_SSAO_FILTERSAMPLES],
-                                                  uniform float filterWeights[NUM_SSAO_FILTERSAMPLES],
+                                                  uniform float2 filterOffs[NUM_SSAO_FILTER_SAMPLES],
+                                                  uniform float filterWeights[NUM_SSAO_FILTER_SAMPLES],
                                                   float scale
                                                   )
@@ -40 +40 @@
         const float eyeSpaceDepth = color.w;
 
-        const float3 centerNormal = normalize(tex2Dlod(normalsTex, float4(texCoord, 0, 0)).xyz);
-        //const float3 centerNormal = tex2Dlod(normalsTex, float4(texCoord, 0, 0)).xyz;
+        const float3 centerNormal = tex2Dlod(normalsTex, float4(texCoord, 0, 0)).xyz;
 
         float4 aoSample;
@@ -53 +52 @@
         float sampleDepth;
 
-        for (int i = 0; i < NUM_SSAO_FILTERSAMPLES; ++ i)
+        for (int i = 0; i < NUM_SSAO_FILTER_SAMPLES; ++ i)
         {
                 sampleTexCoord = float4(texCoord + filterOffs[i] * scale, 0, 0);
 
                 aoSample = tex2Dlod(ssaoTex, sampleTexCoord);
-                sampleNorm = normalize(tex2Dlod(normalsTex, sampleTexCoord).xyz);
-                //sampleNorm = tex2Dlod(normalsTex, sampleTexCoord).xyz;
+                sampleNorm = tex2Dlod(normalsTex, sampleTexCoord).xyz;
 
                 // check depth discontinuity
@@ -96 +94 @@
                                                    uniform sampler2D normalsTex,
                                                    uniform sampler2D colorsTex,
-                                                   uniform float2 filterOffs[NUM_SSAO_FILTERSAMPLES],
+                                                   uniform float2 filterOffs[NUM_SSAO_FILTER_SAMPLES],
                                                    float scale,
                                                    float3 bl,
@@ -107 +105 @@
 
         const float3 centerPos = ReconstructSamplePos(ssaoTex, texCoord, bl, br, tl, tr);
-        const float3 centerNormal = normalize(tex2Dlod(normalsTex, float4(texCoord, 0, 0)).xyz);
-        //const float3 centerNormal = tex2Dlod(normalsTex, float4(texCoord, 0, 0)).xyz;
+        const float3 centerNormal = tex2Dlod(normalsTex, float4(texCoord, 0, 0)).xyz;
 
         float4 aoSample;
@@ -118 +115 @@
         float normalFactor;
         float convergenceFactor;
-        float sampleDepth;
-
-        for (int i = 0; i < NUM_SSAO_FILTERSAMPLES; ++ i)
+        float len;
+
+        for (int i = 0; i < NUM_SSAO_FILTER_SAMPLES; ++ i)
         {
                 sampleTexCoord = float4(texCoord + filterOffs[i] * scale, 0, 0);
 
                 aoSample = tex2Dlod(ssaoTex, sampleTexCoord);
-                sampleNorm = normalize(tex2Dlod(normalsTex, sampleTexCoord).xyz);
-                //sampleNorm = tex2Dlod(normalsTex, sampleTexCoord).xyz;
+                sampleNorm = tex2Dlod(normalsTex, sampleTexCoord).xyz;
 
                 // check spatial discontinuity
                 samplePos = ReconstructSamplePos(ssaoTex, sampleTexCoord.xy, bl, br, tl, tr);
-                float len = SqrLen(centerPos - samplePos);
+                len = min(SqrLen(centerPos - samplePos), 1e2f);
 
                 spatialFactor = 1.0f / max(len, 1e-3f);
@@ -159 +155 @@
                           uniform sampler2D ssaoTex,
                           uniform sampler2D normalsTex,
-                          uniform float2 filterOffs[NUM_SSAO_FILTERSAMPLES],
-                          uniform float filterWeights[NUM_SSAO_FILTERSAMPLES],
+                          uniform float2 filterOffs[NUM_SSAO_FILTER_SAMPLES],
+                          uniform float filterWeights[NUM_SSAO_FILTER_SAMPLES],
                           uniform float4x4 modelViewProj,
                           uniform float3 bl,
@@ -180 +176 @@
 */
 
+        // filter up to a certain convergance value and leave out background (sky) by checking depth
         if ((ao.y < 100.0f) && (col.w < 1e10f))
         //if (col.w < 1e10f)
@@ -189 +186 @@
 
                 const float convergence = ao.y;
-                const float adaptWeight = 5.0f;
-                const float convergenceScale = adaptWeight / (convergence + adaptWeight);
-
-                const float scale = convergenceScale * distanceScale;
-
-
+                const float adaptWeight = 25.0f;
+                const float convergenceScale = SSAO_CONVERGENCE_WEIGHT / (convergence + SSAO_CONVERGENCE_WEIGHT);
+
+                const float scale = NUM_SSAO_FILTER_WIDTH * convergenceScale * distanceScale;
+
+                // the filtered ssao value
                 ao.x = DiscontinuityFilter2(IN.texCoord, ao, col, ssaoTex, normalsTex, colorsTex, filterOffs, scale, bl, br, tl, tr);
         }

GTP/trunk/App/Demos/Vis/FriendlyCulling/src/shaders/deferred.cg

@@ -14 +14 @@
 {
         float4 color: COLOR0;
+        float3 normal: COLOR1;
+        float3 diffVal: COLOR2;
 };
 
@@ -230 +232 @@
         valid in the current frame
         */
-inline float PixelValid(sampler2D diffVals,
-                                                sampler2D oldTex,
+inline float PixelValid(sampler2D oldTex,
                                                 float4 color,
+                                                float3 diffVec,
                                                 float2 texCoord,
                                                 float3 viewDir,
@@ -248 +250 @@
         const float4 worldPos = float4(-viewDir * eyeSpaceDepth, 1.0f);
 
-        float3 diffVec = tex2Dlod(diffVals, float4(texCoord, 0, 0)).xyz;
         
 
@@ -308 +309 @@
 
 
-float4 PrepareSsao(fragment IN,
+pixel PrepareSsao(fragment IN,
                                    uniform sampler2D colorsTex,
+                                   uniform sampler2D normalsTex,
+                                   uniform sampler2D diffVals,
                                    uniform sampler2D oldTex,
                                    uniform float4x4 modelViewProj,
@@ -317 +320 @@
                                    uniform float3 oldtl,
                                    uniform float3 oldtr,
-                                   uniform float3 oldEyePos,
-                                   uniform sampler2D diffVals
-                                   ): COLOR
+                                   uniform float3 oldEyePos
+                                   )
 {   
-        //const float3 normal = normalize(tex2Dlod(normals, float4(IN.texCoord, 0 ,0)).xyz);
+        pixel pix;
+
+        const float3 normal = normalize(tex2Dlod(normalsTex, float4(IN.texCoord, 0 ,0)).xyz);
+        const float3 difVec = tex2Dlod(diffVals, float4(IN.texCoord, 0 ,0)).xyz;
+
         const float3 viewDir = IN.view;
         float4 color = tex2Dlod(colorsTex, float4(IN.texCoord, 0, 0));
@@ -330 +336 @@
 
         // do reprojection and filter out the pixels that are not save
-        float pValid = PixelValid(diffVals,
+        float pValid = PixelValid(
                 oldTex,
                 color, 
+                difVec.xyz,
                 IN.texCoord,
                 viewDir,
@@ -341 +348 @@
                 );
 
-        color.x = pValid;
-        return color;
+        pix.color = color;
+        pix.color.x = pValid;
+
+        pix.normal = normal;
+        pix.diffVal = difVec;
+
+        return pix;
 }
 

GTP/trunk/App/Demos/Vis/FriendlyCulling/src/shaders/ssao.cg

@@ -213 +213 @@
                 const float3 samplePos = ReconstructSamplePos(sampleColor.w, texcoord, bl, br, tl, tr);
                 // the normal of the current sample
-                const float3 sampleNormal = normalize(tex2Dlod(normalTex, float4(texcoord, 0, 0)).xyz);
+                //const float3 sampleNormal = normalize(tex2Dlod(normalTex, float4(texcoord, 0, 0)).xyz);
+                const float3 sampleNormal = tex2Dlod(normalTex, float4(texcoord, 0, 0)).xyz;
 
 
@@ -357 +358 @@
         pixel OUT;
 
-        const float3 normal = normalize(tex2Dlod(normals, float4(IN.texCoord, 0 ,0)).xyz);
+        //const float3 normal = normalize(tex2Dlod(normals, float4(IN.texCoord, 0 ,0)).xyz);
+        const float3 normal = tex2Dlod(normals, float4(IN.texCoord, 0 ,0)).xyz;
 
         // reconstruct position from the eye space depth

GTP/trunk/App/Demos/Vis/FriendlyCulling/src/shaders/ssao3d.cg

@@ -127 +127 @@
         
         // the ambient term
-        const float amb = norm.w;
-
+        //const float amb = norm.w;
         // expand normal
         float3 normal = normalize(norm.xyz);
-        
         /// the current view direction
         float3 viewDir;// = normalize(IN.view);