1 files changed, 31 insertions, 0 deletions
diff --git a/engine/src/core-data/Common/MatDefs/Shadow/PostShadow.vert b/engine/src/core-data/Common/MatDefs/Shadow/PostShadow.vert
new file mode 100644
index 0000000..3f09753
--- /dev/null
+++ b/engine/src/core-data/Common/MatDefs/Shadow/PostShadow.vert
@@ -0,0 +1,31 @@
+uniform mat4 m_LightViewProjectionMatrix;
+uniform mat4 g_WorldViewProjectionMatrix;
+uniform mat4 g_WorldMatrix;
+
+varying vec4 projCoord;
+
+attribute vec3 inPosition;
+
+const mat4 biasMat = mat4(0.5, 0.0, 0.0, 0.0,
+                          0.0, 0.5, 0.0, 0.0,
+                          0.0, 0.0, 0.5, 0.0,
+                          0.5, 0.5, 0.5, 1.0);
+
+void main(){
+    gl_Position = g_WorldViewProjectionMatrix * vec4(inPosition, 1.0);
+
+    // get the vertex in world space
+    vec4 worldPos = g_WorldMatrix * vec4(inPosition, 1.0);
+
+    // convert vertex to light viewProj space
+    //projCoord = biasMat * (m_LightViewProjectionMatrix * worldPos);
+    vec4 coord = m_LightViewProjectionMatrix * worldPos;
+    projCoord = biasMat * coord;
+    //projCoord.z /= gl_DepthRange.far;
+    //projCoord = (m_LightViewProjectionMatrix * worldPos);
+    //projCoord /= projCoord.w;
+    //projCoord.xy = projCoord.xy * vec2(0.5, -0.5) + vec2(0.5);
+
+    // bias from [-1, 1] to [0, 1] for sampling shadow map
+    //projCoord = (projCoord.xyzw * vec4(0.5)) + vec4(0.5);
+}
+\ No newline at end of file