xray shader for glare billboards

xray_shader.py

@@ -0,0 +1,46 @@
+import bge
+
+cont = bge.logic.getCurrentController()
+
+VertexShader = """
+        varying vec4 texCoords; 
+           // this is a varying variable in the vertex shader
+         
+        void main()
+        {
+            texCoords = gl_MultiTexCoord0;
+            gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;
+         }
+
+"""
+
+FragmentShader = """
+         varying vec4 texCoords; 
+         uniform sampler2D textureUnit;
+         
+         void main()
+         {
+            vec2 longitudeLatitude = vec2(
+                (atan(texCoords.y, texCoords.x) / 3.1415926 + 1.0) * 0.5,
+                1.0 - acos(texCoords.z) / 3.1415926);
+
+
+            gl_FragColor = texture2D(textureUnit, texCoords);
+            gl_FragDepth = 0.0;
+               // Here the fragment shader reads intput(!) from the 
+               // varying variable. The red, gree, blue, and alpha 
+               // component of the fragment color are set to the 
+               // values in the varying variable. (The alpha 
+               // component of the fragment doesn't matter here.) 
+         }
+
+"""
+
+mesh = cont.owner.meshes[0]
+for mat in mesh.materials:
+    shader = mat.getShader()
+    if shader != None:
+        if not shader.isValid():
+            shader.setSource(VertexShader, FragmentShader, 1)
+            shader.setSampler('textureUnit', 0)
+