SpotLightShadowRenderer, fixed an issue where a spot light would wast shadows behind itself

git-svn-id: https://jmonkeyengine.googlecode.com/svn/trunk@11026 75d07b2b-3a1a-0410-a2c5-0572b91ccdca

engine/src/core-data/Common/MatDefs/Light/Lighting.j3md

@@ -124,6 +124,7 @@ MaterialDef Phong Lighting {
         Matrix4 LightViewProjectionMatrix4
         Matrix4 LightViewProjectionMatrix5   
         Vector3 LightPos
+        Vector3 LightDir
 
         Float PCFEdge
         Float ShadowMapSize
@@ -282,6 +283,25 @@ MaterialDef Phong Lighting {
 
     }
 
+
+    Technique PreNormalPassDerivative {
+
+        VertexShader GLSL100 :   Common/MatDefs/MSSAO/normal.vert
+        FragmentShader GLSL100 : Common/MatDefs/MSSAO/normal.frag
+
+        WorldParameters {
+            WorldViewProjectionMatrix
+            WorldViewMatrix
+            NormalMatrix
+        }
+
+        Defines {
+            DIFFUSEMAP_ALPHA : DiffuseMap
+            NUM_BONES : NumberOfBones
+        }
+
+    }
+
     Technique GBuf {
 
         VertexShader GLSL100:   Common/MatDefs/Light/GBuf.vert

engine/src/core-data/Common/MatDefs/Misc/Unshaded.j3md

@@ -43,6 +43,7 @@ MaterialDef Unshaded {
         Matrix4 LightViewProjectionMatrix4
         Matrix4 LightViewProjectionMatrix5
         Vector3 LightPos
+        Vector3 LightDir
 
         Float PCFEdge
 

engine/src/core-data/Common/MatDefs/Shadow/PostShadow.frag

@@ -14,6 +14,10 @@ varying vec4 projCoord3;
     varying vec4 projCoord5;
     uniform vec3 m_LightPos;
     varying vec4 worldPos;
+#else
+    #ifndef PSSM        
+        varying float lightDot;
+    #endif
 #endif
 
 #ifdef DISCARD_ALPHA
@@ -57,6 +61,10 @@ void main(){
                            projCoord0, projCoord1, projCoord2, projCoord3);
        #else 
             //spotlight
+            if(lightDot < 0){
+                outFragColor =  vec4(1.0);
+                return;
+            }
             shadow = getSpotLightShadows(m_ShadowMap0,projCoord0);
        #endif
     #endif   

engine/src/core-data/Common/MatDefs/Shadow/PostShadow.j3md

@@ -24,6 +24,7 @@ MaterialDef Post Shadow {
         Matrix4 LightViewProjectionMatrix4
         Matrix4 LightViewProjectionMatrix5
         Vector3 LightPos
+        Vector3 LightDir
 
         Float PCFEdge
 

engine/src/core-data/Common/MatDefs/Shadow/PostShadow.vert

@@ -15,11 +15,17 @@ varying vec4 projCoord2;
 varying vec4 projCoord3;
 
 #ifdef POINTLIGHT
-uniform mat4 m_LightViewProjectionMatrix4;
+    uniform mat4 m_LightViewProjectionMatrix4;
-uniform mat4 m_LightViewProjectionMatrix5;
+    uniform mat4 m_LightViewProjectionMatrix5;
-varying vec4 projCoord4;
+    varying vec4 projCoord4;
-varying vec4 projCoord5;
+    varying vec4 projCoord5;
-varying vec4 worldPos;
+    varying vec4 worldPos;
+#else
+    #ifndef PSSM
+        uniform vec3 m_LightPos; 
+        uniform vec3 m_LightDir; 
+        varying float lightDot;
+    #endif
 #endif
 
 #ifdef PSSM
@@ -70,9 +76,9 @@ void main(){
         projCoord4 = biasMat * m_LightViewProjectionMatrix4 * worldPos;
         projCoord5 = biasMat * m_LightViewProjectionMatrix5 * worldPos;
     #else
-        
+        #ifndef PSSM
-        vec4 vLightPos = g_ViewMatrix * vec4(m_LightPos,1.0);
+            vec3 lightDir = worldPos.xyz - m_LightPos;
-        vec4 vPos = g_ViewMatrix * worldPos;        
+            lightDot = dot(m_LightDir,lightDir);
-        lightVec = vLightPos.xyz - vPos.xyz;
+        #endif
     #endif
 }

engine/src/core-data/Common/MatDefs/Shadow/PostShadow15.frag

@@ -16,6 +16,10 @@ in vec4 projCoord3;
     in vec4 projCoord5;
     in vec4 worldPos;
     uniform vec3 m_LightPos; 
+#else
+    #ifndef PSSM        
+        in float lightDot;
+    #endif
 #endif
 
 #ifdef DISCARD_ALPHA
@@ -33,7 +37,7 @@ uniform vec2 m_FadeInfo;
 #endif
 
 void main(){
-    
+
     #ifdef DISCARD_ALPHA
         #ifdef COLOR_MAP
              float alpha = texture2D(m_ColorMap,texCoord).a;
@@ -56,8 +60,12 @@ void main(){
             shadow = getDirectionalLightShadows(m_Splits, shadowPosition,
                            m_ShadowMap0,m_ShadowMap1,m_ShadowMap2,m_ShadowMap3,
                            projCoord0, projCoord1, projCoord2, projCoord3);
-       #else 
+       #else
             //spotlight
+            if(lightDot < 0){
+                outFragColor =  vec4(1.0);
+                return;
+            }
             shadow = getSpotLightShadows(m_ShadowMap0,projCoord0);
        #endif
     #endif   

engine/src/core-data/Common/MatDefs/Shadow/PostShadow15.vert

@@ -6,8 +6,6 @@ uniform mat4 m_LightViewProjectionMatrix3;
 
 uniform mat4 g_WorldViewProjectionMatrix;
 uniform mat4 g_WorldMatrix;
-uniform mat4 g_ViewMatrix;
-uniform vec3 m_LightPos; 
 
 out vec4 projCoord0;
 out vec4 projCoord1;
@@ -15,11 +13,17 @@ out vec4 projCoord2;
 out vec4 projCoord3;
 
 #ifdef POINTLIGHT
-uniform mat4 m_LightViewProjectionMatrix4;
+    uniform mat4 m_LightViewProjectionMatrix4;
-uniform mat4 m_LightViewProjectionMatrix5;
+    uniform mat4 m_LightViewProjectionMatrix5;
-out vec4 projCoord4;
+    out vec4 projCoord4;
-out vec4 projCoord5;
+    out vec4 projCoord5;
-out vec4 worldPos;
+    out vec4 worldPos;
+#else
+    #ifndef PSSM
+        uniform vec3 m_LightPos; 
+        uniform vec3 m_LightDir; 
+        out float lightDot;
+    #endif
 #endif
 
 #ifdef PSSM
@@ -69,10 +73,10 @@ void main(){
     #ifdef POINTLIGHT
         projCoord4 = biasMat * m_LightViewProjectionMatrix4 * worldPos;
         projCoord5 = biasMat * m_LightViewProjectionMatrix5 * worldPos;
-    #else
+    #else        
-        
+        #ifndef PSSM
-        vec4 vLightPos = g_ViewMatrix * vec4(m_LightPos,1.0);
+            vec3 lightDir = worldPos.xyz - m_LightPos;
-        vec4 vPos = g_ViewMatrix * worldPos;        
+            lightDot = dot(m_LightDir,lightDir);
-        lightVec = vLightPos.xyz - vPos.xyz;
+        #endif
     #endif
 }

engine/src/core-data/Common/MatDefs/Shadow/PostShadowFilter.frag

@@ -22,6 +22,11 @@ uniform mat4 m_LightViewProjectionMatrix3;
     uniform vec3 m_LightPos;
     uniform mat4 m_LightViewProjectionMatrix4;
     uniform mat4 m_LightViewProjectionMatrix5;
+#else
+    #ifndef PSSM    
+        uniform vec3 m_LightPos;    
+        uniform vec3 m_LightDir;       
+    #endif
 #endif
 
 #ifdef FADE
@@ -51,7 +56,15 @@ void main(){
 
     // get the vertex in world space
     vec4 worldPos = vec4(getPosition(depth,texCoord),1.0);
-  
+   
+     #if (!defined(POINTLIGHT) && !defined(PSSM))
+          vec3 lightDir = worldPos.xyz - m_LightPos;
+          if( dot(m_LightDir,lightDir)<0){
+            gl_FragColor = color;
+            return;
+          }         
+    #endif
+
     // populate the light view matrices array and convert vertex to light viewProj space
     vec4 projCoord0 = biasMat * m_LightViewProjectionMatrix0 * worldPos;
     vec4 projCoord1 = biasMat * m_LightViewProjectionMatrix1 * worldPos;

engine/src/core-data/Common/MatDefs/Shadow/PostShadowFilter.j3md

@@ -24,6 +24,7 @@ MaterialDef Post Shadow {
         Matrix4 LightViewProjectionMatrix4
         Matrix4 LightViewProjectionMatrix5  
         Vector3 LightPos 
+        Vector3 LightDir
 
         Float PCFEdge
 

engine/src/core-data/Common/MatDefs/Shadow/PostShadowFilter15.frag

@@ -24,6 +24,11 @@ uniform mat4 m_LightViewProjectionMatrix3;
     uniform vec3 m_LightPos;
     uniform mat4 m_LightViewProjectionMatrix4;
     uniform mat4 m_LightViewProjectionMatrix5;
+#else
+    #ifndef PSSM    
+        uniform vec3 m_LightPos;    
+        uniform vec3 m_LightDir;       
+    #endif
 #endif
 
 #ifdef FADE
@@ -48,6 +53,13 @@ vec4 main_multiSample(in int numSample){
     // get the vertex in world space
     vec4 worldPos = vec4(getPosition(depth,texCoord),1.0);
   
+    #if (!defined(POINTLIGHT) && !defined(PSSM))
+          vec3 lightDir = worldPos.xyz - m_LightPos;
+          if( dot(m_LightDir,lightDir)<0){
+             return color;
+          }         
+    #endif
+
     // populate the light view matrices array and convert vertex to light viewProj space
     vec4 projCoord0 = biasMat * m_LightViewProjectionMatrix0 * worldPos;
     vec4 projCoord1 = biasMat * m_LightViewProjectionMatrix1 * worldPos;

engine/src/core/com/jme3/shadow/SpotLightShadowRenderer.java

@@ -164,6 +164,8 @@ public class SpotLightShadowRenderer extends AbstractShadowRenderer {
 
     @Override
     protected void setMaterialParameters(Material material) {    
+         material.setVector3("LightPos", light.getPosition());
+         material.setVector3("LightDir", light.getDirection());
     }
 
     /**