Add tetrahedron shadow maps for point lights

[libs/gl.git] / shaderlib / occluder_thsm.glsl

diff --git a/shaderlib/occluder_thsm.glsl b/shaderlib/occluder_thsm.glsl
new file mode 100644 (file)
index 0000000..13a78c0
--- /dev/null
+++ b/shaderlib/occluder_thsm.glsl
@@ -0,0 +1,11 @@
+import msp_interface;
+import occluder;
+
+#pragma MSP stage(vertex)
+out float gl_ClipDistance[2];
+
+void clipping(vec3 eye_vertex) override
+{
+       gl_ClipDistance[0] = dot(eye_vertex.xyz, vec3(0.5, -0.288675, -0.816497));
+       gl_ClipDistance[1] = dot(eye_vertex.xyz, vec3(-0.5, -0.288675, -0.816497));
+}