ubershaders and path stripping in metascene

[ld37_one_room] / sdr / uber.v.glsl

diff --git a/sdr/uber.v.glsl b/sdr/uber.v.glsl
new file mode 100644 (file)
index 0000000..a6c82d0
--- /dev/null
+++ b/sdr/uber.v.glsl
@@ -0,0 +1,33 @@
+varying vec3 vpos, vdir, normal;
+#ifdef USE_SHADOWMAP
+varying vec4 shadow_tc;
+#endif
+#ifdef USE_CUBEMAP
+varying vec3 wdir;
+uniform mat4 envmap_matrix;
+#endif
+
+void main()
+{
+       gl_Position = ftransform();
+
+       vpos = (gl_ModelViewMatrix * gl_Vertex).xyz;
+       normal = gl_NormalMatrix * gl_Normal;
+       vdir = -vpos;
+#ifdef USE_CUBEMAP
+       wdir = (envmap_matrix * vec4(vdir, 1.0)).xyz;   // bring back to world space
+#endif
+#ifdef USE_TEXMAP
+       gl_TexCoord[0] = gl_TextureMatrix[0] * gl_MultiTexCoord0;
+#endif
+
+#ifdef USE_SHADOWMAP
+       mat4 offmat = 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);
+       mat4 tex_matrix = offmat * gl_TextureMatrix[1];
+
+       shadow_tc = tex_matrix * vec4(vpos, 1.0);
+#endif
+}