Changeset 2869 for GTP

Timestamp:

08/26/08 18:09:03 (16 years ago)

Author:

mattausch

Message:

computing ao in nice function ... but slow!!

Location:

GTP/trunk/App/Demos/Vis/FriendlyCulling

Files:

• FriendlyCulling.vcproj (modified) (1 diff)
• src/SsaoShader.cpp (modified) (6 diffs)
• src/SsaoShader.h (modified) (2 diffs)
• src/shaders/ssao.cg (modified) (4 diffs)

GTP/trunk/App/Demos/Vis/FriendlyCulling/FriendlyCulling.vcproj

@@ -799 +799 @@
                                 >
                         </File>
-                        <File
-                                RelativePath=".\src\shaders\temporal.cg"
-                                >
-                        </File>
                 </Filter>
                 <File

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

@@ -21 +21 @@
 static CGprogram sCgDeferredProgram2 = NULL;
 static CGprogram sCgAntiAliasingProgram = NULL;
+static CGprogram sCgCombineProgram = NULL;
+
+static CGparameter sColorsTexCombineParam;
+static CGparameter sSsaoTexCombineParam;
 
 static CGparameter sColorsTexDeferredParam;
@@ -91 +95 @@
         // the diffuse color buffer
         mFbo3->AddColorBuffer(ColorBufferObject::BUFFER_FLOAT_32, ColorBufferObject::WRAP_CLAMP_TO_EDGE, ColorBufferObject::FILTER_LINEAR, false);
-        
+                
+        mFbo4 = new FrameBufferObject(w, h, FrameBufferObject::DEPTH_NONE);
+        // the diffuse color buffer
+        mFbo4->AddColorBuffer(ColorBufferObject::BUFFER_FLOAT_32, ColorBufferObject::WRAP_CLAMP_TO_EDGE, ColorBufferObject::FILTER_LINEAR, false);
 
         // create noise texture for ssao
@@ -131 +138 @@
         else
                 cerr << "deferred program failed to load" << endl;
+
+
+        sCgCombineProgram = 
+                cgCreateProgramFromFile(context, 
+                                                                CG_SOURCE,
+                                                                "src/shaders/ssao.cg", 
+                                                                RenderState::sCgFragmentProfile,
+                                                                "combined",
+                                                                NULL);
+
+        if (sCgCombineProgram != NULL)
+        {
+                cgGLLoadProgram(sCgCombineProgram);
+
+                // we need size of texture for scaling
+                sColorsTexCombineParam = cgGetNamedParameter(sCgCombineProgram, "colors");  
+                sSsaoTexCombineParam = cgGetNamedParameter(sCgCombineProgram, "ssaoTex"); 
+        }
+        else
+                cerr << "combined program failed to load" << endl;
 
 
@@ -230 +257 @@
         FirstPass(fbo);
         ComputeSsao(fbo, expFactor);
+        Combine(fbo);
         AntiAliasing(fbo);
 
@@ -415 +443 @@
 void SsaoShader::AntiAliasing(FrameBufferObject *fbo)
 {
-        GLuint colorsTex = mNewFbo->GetColorBuffer(0)->GetTexture();
+        GLuint colorsTex = mFbo4->GetColorBuffer(0)->GetTexture();
+        //GLuint colorsTex = mNewFbo->GetColorBuffer(0)->GetTexture();
         GLuint normalsTex = fbo->GetColorBuffer(2)->GetTexture();
         
@@ -503 +532 @@
 }
 
+
+void SsaoShader::Combine(FrameBufferObject *fbo)
+{
+        GLuint colorsTex = mFbo3->GetColorBuffer(0)->GetTexture();
+        GLuint ssaoTex = mNewFbo->GetColorBuffer(0)->GetTexture();
+
+        mFbo4->Bind();
+        //mNewFbo->Bind();
+
+        glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+        
+        glDrawBuffers(1, mymrt);
+
+        cgGLEnableProfile(RenderState::sCgFragmentProfile);
+
+        cgGLBindProgram(sCgCombineProgram);
+
+        cgGLSetTextureParameter(sColorsTexCombineParam, colorsTex);
+        cgGLEnableTextureParameter(sColorsTexCombineParam);
+
+        cgGLSetTextureParameter(sSsaoTexCombineParam, ssaoTex);
+        cgGLEnableTextureParameter(sSsaoTexCombineParam);
+
+        glColor3f(1.0f, 1.0f, 1.0f);
+
+        const float offs = 0.5f;
+
+        glBegin(GL_QUADS);
+
+        glTexCoord2f(0, 0); glVertex3f(-offs, -offs, -0.5f);
+        glTexCoord2f(1, 0); glVertex3f( offs, -offs, -0.5f);
+        glTexCoord2f(1, 1); glVertex3f( offs,  offs, -0.5f);
+        glTexCoord2f(0, 1); glVertex3f(-offs,  offs, -0.5f);
+
+        glEnd();
+
+        cgGLDisableTextureParameter(sColorsTexCombineParam);
+        cgGLDisableTextureParameter(sSsaoTexCombineParam);
+
+        cgGLDisableProfile(RenderState::sCgFragmentProfile);
+
+        FrameBufferObject::Release();
+
+        PrintGLerror("deferred shading");
+}
+
+
 } // namespace

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

@@ -53 +53 @@
 
         void AntiAliasing(FrameBufferObject *fbo);
+        void Combine(FrameBufferObject *fbo);
 
         void CreateNoiseTex2D();
@@ -71 +72 @@
         FrameBufferObject *mNewFbo;
         FrameBufferObject *mFbo3;
+        FrameBufferObject *mFbo4;
 };
 

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

@@ -181 +181 @@
         return float4(total_color, 1.0f - total_ao);
 }
+
+
+float ComputeSmoothedColor(float4 centerPosition, 
+                                                   uniform sampler2D oldTex,
+                                                   uniform float maxDepth,  
+                                                   uniform float expFactor,
+                                                   const uniform float4x4 oldModelViewProj,
+                                                   float4 currentCol
+                                                   )
+{
+        float4 realPos = centerPosition * maxDepth;
+        realPos.w = 1.0f;
+
+        float4 oldPos = mul(oldModelViewProj, realPos);
+
+        float newDepth = oldPos.z / oldPos.w;
+
+        float2 tex = (oldPos.xy / oldPos.w) * 0.5f + 0.5f;
+        float4 oldCol = tex2D(oldTex, tex);
+
+        float oldDepth = oldCol.w;
+        float depthDif = 1.0f - newDepth / oldDepth;
+
+        float4 col;
+
+        if ((tex.x >= 0.0f) && (tex.x < 1.0f) && 
+                (tex.y >= 0.0f) && (tex.y < 1.0f) && 
+                (abs(depthDif)  < 1e-4f))
+        {
+                col = currentCol * expFactor + oldCol * float4(1.0f - expFactor);
+        }
+        else
+        {
+                col = currentCol;
+        }
+
+        return col;
+ }
 
 
@@ -217 +255 @@
 
         float ao = ssao(IN, positions, noiseTexture, samples, normal.xyz, viewDir, noiseMultiplier, centerPosition);
-        float4 attenuated_color = ao * col;
+        //float4 attenuated_color = ao * col;
         //float4 attenuated_color = ao;
 
@@ -223 +261 @@
         //float4 attenuated_color = ao * col + new_col;
         
-        const float x = expFactor;
-
-        float4 dummy = centerPosition * maxDepth;
-        dummy.w = 1.0f;
-
-        float4 oldPos = mul(oldModelViewProj, dummy);
-
-        float newDepth = oldPos.z / oldPos.w;
- 
-        float2 tex = (oldPos.xy / oldPos.w) * 0.5f + 0.5f;
-        float4 col1 = tex2D(oldTex, tex);
-
-        float oldDepth = col1.w;
-        float depthDif = 1.0f - newDepth / oldDepth;
-
-        if ((tex.x >= 0.0f) && (tex.x < 1.0f) && 
-                (tex.y >= 0.0f) && (tex.y < 1.0f) && 
-                (abs(depthDif)  < 1e-4f))
-        {
-                OUT.color = attenuated_color * expFactor + col1 * float4(1.0f - expFactor);
-        }
-        else
-        {
-                OUT.color = attenuated_color;
-        }
+        // compute temporally smoothed color
+        OUT.color = ComputeSmoothedColor(centerPosition, oldTex, maxDepth, expFactor, oldModelViewProj, float4(ao));
 
         //OUT.color.xyz = viewDir;
@@ -256 +271 @@
         return OUT;
 }
+
+
+pixel combined(fragment IN, 
+                           uniform sampler2D colors,
+                           uniform sampler2D ssaoTex
+                   )
+{
+        pixel OUT;
+
+        float4 col = tex2D(colors, IN.texCoord.xy);
+        float4 ao = tex2D(ssaoTex, IN.texCoord.xy);
+
+        OUT.color = float4(1,0,0,0);
+        OUT.color = col * ao;
+
+        return OUT;
+}