Changeset 2945

Timestamp:

09/15/08 01:43:13 (16 years ago)

Author:

mattausch

Message:

 

Location:

GTP/trunk/App/Demos/Vis/FriendlyCulling

Files:

• default.env (modified) (1 diff)
• src/Plane3.cpp (modified) (1 diff)
• src/ShadowMapping.cpp (modified) (1 diff)
• src/chcdemo.cpp (modified) (7 diffs)
• src/shaders/deferred.cg (modified) (7 diffs)

GTP/trunk/App/Demos/Vis/FriendlyCulling/default.env

@@ -10 +10 @@
 winHeight=768
 camPosition=483.398f 242.364f 186.078f
-camDirection=0 1 0
+camDirection=1 0 0
 useFullScreen=0
 useLODs=1
+shadowSize=2048
 #modelPath=data/city/model/
 

GTP/trunk/App/Demos/Vis/FriendlyCulling/src/Plane3.cpp

@@ -121 +121 @@
         mD = -w / mag;
 
+        /*
         // find point on plane
-        /*const Vector3 pt = mNormal * -mD;
+        const Vector3 pt = mNormal * -mD;
 
         // transform point
         const Vector3 newPt = m * pt;
+
         // transform normal
-        const Vector3 newNormal = TransformNormal(m, newPt);
+        nNormal = Normalize(TransformNormal(m, newPt));
 
-        const float mag = Magnitude(newNormal);
-
-        return Plane3(newNormal / mag,  newPt / mag);*/
+        mD = -DotProd(mNormal, newPt);
+        */
 }
 

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

@@ -282 +282 @@
         //-- first find the free parameter values n, and P (the projection center), and the projection depth
 
-        //const float n = ComputeN(bounds_ls);
-        const float n = ComputeNOpt(lightSpace, extremalPoints, body);
-
-        cout << "n: " << n << endl;
+        const float n = ComputeN(bounds_ls);
+        //const float n = ComputeNOpt(lightSpace, extremalPoints, body); cout << "n: " << n << endl;
 
         if (n >= 1e6f) // light direction nearly parallel to view => switch to uniform

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

@@ -100 +100 @@
 static int winHeight = 768;
 
-//const float shadowSize = 4096;
-const float shadowSize = 2048;
+int shadowSize = 2048;
 
 static float winAspectRatio = 1.0f;
@@ -313 +312 @@
 
                 env.GetBoolParam(string("useLODs"), useLODs);
+                env.GetIntParam(string("shadowSize"), shadowSize);
 
                 //env.GetStringParam(string("modelPath"), model_path);
@@ -330 +330 @@
                 cout << "camPosition: " << camPos << endl;
                 cout << "temporal coherence: " << ssaoTempCohFactor << endl;
+                cout << "shadow size: " << shadowSize << endl;
 
                 //cout << "model path: " << model_path << endl;
@@ -747 +748 @@
         glEnable(GL_LIGHTING);
         glEnable(GL_LIGHT0);
-        glEnable(GL_LIGHT1);
-        
-        GLfloat ambient[] = {0.2, 0.2, 0.2, 1.0};
+        
+        ///////////
+        //-- first light: sunlight
+
+        //GLfloat ambient[] = {0.2, 0.2, 0.2, 1.0};
+        GLfloat ambient[] = {0.5, 0.5, 0.5, 1.0};
         GLfloat diffuse[] = {1.0, 1.0, 1.0, 1.0};
         GLfloat specular[] = {1.0, 1.0, 1.0, 1.0};
-            
-        GLfloat lmodel_ambient[] = {0.3f, 0.3f, 0.3f, 1.0f};
 
         glLightfv(GL_LIGHT0, GL_AMBIENT, ambient);
@@ -759 +761 @@
         glLightfv(GL_LIGHT0, GL_SPECULAR, specular);
 
+        GLfloat position[] = {0.8f, -1.0f, 0.7f, 0.0f};
+        glLightfv(GL_LIGHT0, GL_POSITION, position);
+
+#if 0
 
         ////////////
         //-- second light
+        
+        // physically incorrect to have second directional light, 
+        // but gives nicer shading for fixed function
+
+        glEnable(GL_LIGHT1);
 
         GLfloat ambient1[] = {0.2, 0.2, 0.2, 1.0};
         GLfloat diffuse1[] = {1.0, 1.0, 1.0, 1.0};
-        //GLfloat diffuse1[] = {0.5, 0.5, 0.5, 1.0};
         GLfloat specular1[] = {0.0, 0.0, 0.0, 1.0};
 
@@ -772 +782 @@
         glLightfv(GL_LIGHT1, GL_SPECULAR, specular1);
 
-        
-        //////////////////////////////
-
-        GLfloat position[] = {0.8f, -1.0f, 0.7f, 0.0f};
-        glLightfv(GL_LIGHT0, GL_POSITION, position);
-
         GLfloat position1[] = {-0.5f, 0.5f, 0.4f, 0.0f};
         glLightfv(GL_LIGHT1, GL_POSITION, position1);
+
+        //GLfloat lmodel_ambient[] = {0.3f, 0.3f, 0.3f, 1.0f};
+
+#endif
+
+        //////////////////////////////
+
+        GLfloat lmodel_ambient[] = {0.5f, 0.5f, 0.5f, 1.0f};
 
         glLightModelfv(GL_LIGHT_MODEL_AMBIENT, lmodel_ambient);
@@ -1006 +1018 @@
         glLightfv(GL_LIGHT0, GL_POSITION, position);
 
+#if 0
         GLfloat position1[] = {-0.5f, 0.5f, 0.4f, 0.0f};
         glLightfv(GL_LIGHT1, GL_POSITION, position1);
-
+#endif
 
         if (renderLightView)

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

@@ -35 +35 @@
                          uniform float amb)
 {
-        float4 lightDir = float4(0.8f, -1.0f, 0.7f, 0.0f);
-        //float4 lightDir = float4(0.0f, 1.0f, 0.0f, 0.0f);
+        const float4 lightDir = float4(0.8f, -1.0f, 0.7f, 0.0f);
+        const float3 light = normalize(lightDir.xyz);
+        const float diffuseLight = saturate(dot(normal, light));
+        
+        /*
         float4 lightDir2 = float4(-0.5f, 0.5f, 0.4f, 0.0f);
+        float3 light2 = normalize(lightDir2.xyz);
+        float diffuseLight2 = saturate(dot(normal, light2));
+*/
+        float diffuse = diffuseLight;// + diffuseLight2;
 
         // global ambient
         const float4 ambient = 0.25f;
-
-        // float3 L = normalize(lightPosition - position);
-        float3 light = normalize(lightDir.xyz);
-        float3 light2 = normalize(lightDir2.xyz);
-
-        float diffuseLight = saturate(dot(normal, light));
-        float diffuseLight2 = saturate(dot(normal, light2));
-
-        float diffuse = diffuseLight + diffuseLight2;
+        //const float4 ambient = 0.0f;
 
         return (ambient + diffuse) * color * (1.0f - amb) + amb * color;
@@ -73 +72 @@
         float amb = norm.w;
 
-        // expand normal
-        float3 normal = normalize(norm.xyz);// * 2.0f - float4(1.0f));
+        float3 normal = normalize(norm.xyz);
 
         float4 col = shade(IN, color, position, normal, amb);
@@ -95 +93 @@
                                          )
 {
-        float s;
-
         float total_d = 0.0;
-        //float total_d = tex2D(shadowMap, lightSpacePos).x;
 
         for (int i = 0; i < NUM_SAMPLES; ++ i) 
@@ -118 +113 @@
                 float shadowDepth = tex2D(shadowMap, texcoord).x;
 
-                total_d += step(shadowDepth, depth);
-                //total_d += length(offsetTransformed);
+                total_d += step(depth, shadowDepth);
         }
 
@@ -199 +193 @@
         
         /*
-
+        // hard shadows
         float shadowDepth = tex2D(shadowMap, lightSpacePos.xy).x;
 
@@ -212 +206 @@
         return OUT;
 }
+
 #else
+
 
 pixel main_shadow(fragment IN, 
@@ -231 +227 @@
         float4 color = tex2Dlod(colors, float4(IN.texCoord.xy, 0, 0));
         float4 position = tex2D(positions, IN.texCoord.xy);
-
-
-        // an ambient color term
-        float amb = norm.w;
-
-        float3 normal = normalize(norm.xyz);
-        float4 col = shade(IN, color, position, normal, amb);
-        
-        position *= maxDepth;
-        position.w = 1.0f;
-        
-        float4 lightSpacePos = mul(shadowMatrix, position);
-        lightSpacePos /= lightSpacePos.w;
-
-        OUT.color = col;
-
-        float shadowTerm = CalcShadowTerm(IN, shadowMap, sampleWidth, lightSpacePos.xy, lightSpacePos.z, samples, noiseTexture);
-
-        if (amb < 0.9f) // hack: prevent shadowing the sky      
-        {
-                // base lighting
-                const float baseLighting = 0.3f;
-                OUT.color *= baseLighting + (1.0f - baseLighting) * (1.0f - shadowTerm);
-        }
-        
+        
+        const float3 normal = normalize(norm.xyz);
+        const float3 lightDir = normalize(float3(0.8f, -1.0f, 0.7f));
+
+        // hack: an emmisive color term
+        float emmisive = norm.w;
+
+        // diffuse intensity
+        const float angle = saturate(dot(normal, lightDir)); 
+        float diffuse = angle;
+
+        // calc diffuse illumination + shadow term
+        if ((emmisive < 0.95f) // hack: prevent shadowing the sky       
+                && (angle > 1e-3f)
+                )
+        {
+                position *= maxDepth;
+                position.w = 1.0f;
+
+                float4 lightSpacePos = mul(shadowMatrix, position);
+                lightSpacePos /= lightSpacePos.w;
+
+                float shadowTerm = CalcShadowTerm(IN, shadowMap, sampleWidth, lightSpacePos.xy, lightSpacePos.z, samples, noiseTexture);
+
+                diffuse *= shadowTerm;
+        }
+
+        // global ambient
+        const float4 ambient = 0.25f;
+        
+        // base lighting
+        OUT.color = (ambient + diffuse) * color * (1.0f - emmisive) + emmisive * color;
+
         // also write out depth component
         OUT.color.w = color.w;