1 files changed, 37 insertions, 0 deletions
diff --git a/engine/src/core-data/Common/MatDefs/Shadow/PostShadowPSSM.vert b/engine/src/core-data/Common/MatDefs/Shadow/PostShadowPSSM.vert
new file mode 100644
index 0000000..b1c1690
--- /dev/null
+++ b/engine/src/core-data/Common/MatDefs/Shadow/PostShadowPSSM.vert
@@ -0,0 +1,37 @@
+uniform mat4 m_LightViewProjectionMatrix0;
+uniform mat4 m_LightViewProjectionMatrix1;
+uniform mat4 m_LightViewProjectionMatrix2;
+uniform mat4 m_LightViewProjectionMatrix3;
+
+uniform mat4 g_WorldViewProjectionMatrix;
+uniform mat4 g_WorldMatrix;
+
+varying vec4 projCoord0;
+varying vec4 projCoord1;
+varying vec4 projCoord2;
+varying vec4 projCoord3;
+
+varying float shadowPosition;
+
+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);
+
+    shadowPosition = gl_Position.z;
+    // get the vertex in world space
+    vec4 worldPos = g_WorldMatrix * vec4(inPosition, 1.0);
+
+
+    // populate the light view matrices array and convert vertex to light viewProj space
+    projCoord0 = biasMat * m_LightViewProjectionMatrix0 * worldPos;
+    projCoord1 = biasMat * m_LightViewProjectionMatrix1 * worldPos;
+    projCoord2 = biasMat * m_LightViewProjectionMatrix2 * worldPos;
+    projCoord3 = biasMat * m_LightViewProjectionMatrix3 * worldPos;
+}
+\ No newline at end of file