Changeset 2337 for GTP/trunk/App/Demos/Illum/Ogre/Media/materials/GTPBasic

Timestamp:

04/24/07 14:10:34 (18 years ago)

Author:

szirmay

Message:

 

Location:

GTP/trunk/App/Demos/Illum/Ogre/Media/materials/GTPBasic

Files:

• GTPBasic.program (modified) (1 diff)
• GTPShadowMap_PS.hlsl (modified) (2 diffs)

GTP/trunk/App/Demos/Illum/Ogre/Media/materials/GTPBasic/GTPBasic.program

@@ -193 +193 @@
    source GTPShadowMap_PS.hlsl
    entry_point shadowMapDist_Variance
+   target ps_2_0
+}
+
+fragment_program GTP/Basic/SM/Dist_POINT_VSM_PS hlsl
+{
+   source GTPShadowMap_PS.hlsl
+   entry_point shadowMapDist_POINT_Variance
    target ps_2_0
 }

GTP/trunk/App/Demos/Illum/Ogre/Media/materials/GTPBasic/GTPShadowMap_PS.hlsl

@@ -106 +106 @@
     float4 pos = (IN.LightVPos / IN.LightVPos.w);
         float d = length(pos.xy);
-    light = saturate((1.0 - d)/0.05);           
     if(d <= 1.0)
     {
@@ -126 +125 @@
     }
   }
-  else
-   light = 0;   
         
   return shadowColor + (1 - shadowColor) * light;
 }
+
+
+float4 shadowMapDist_POINT_Variance(LightCPos_OUT IN,
+                              uniform float lightFarPlane,
+                              uniform samplerCUBE shadowMap) : COLOR
+{
+  float4 light = float4(1,1,1,1);
+  
+  float dist = length(IN.LightCPos.xyz) / lightFarPlane;
+  float4 storedDist = texCUBE(shadowMap, float3(IN.LightCPos.xy, -IN.LightCPos.z));
+  dist -= DIST_BIAS_VSM;
+  float lit_factor = light * (dist <= storedDist.r);    
+         
+  float M1 = storedDist.r;
+  float M2 = storedDist.g;
+  float v2 = min(max(M2 - M1 * M1, 0.0) +  DIST_EPSILON, 1.0);
+  float m_d = M1 - dist;
+  float pmax = v2 / (v2 + m_d * m_d);
+                                                
+  // Adjust the light color based on the shadow attenuation
+  light = max(lit_factor, pmax);        
+        
+  
+  return (shadowColor + (1 - shadowColor) * light);
+}