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authorBrian Paul <[email protected]>2008-08-16 09:36:46 -0600
committerBrian Paul <[email protected]>2008-08-16 09:36:46 -0600
commitc0dd9122fdedd4bcab5bc0b3bbb490e6b62fac83 (patch)
treeac114b79c5790b10c0a8904ca79dfea5480c5617 /progs/glsl/reflect.vert
parentce00d232f3c01c71fb659568e9b58da1f24b2519 (diff)
remove .txt suffix from shader source files
Diffstat (limited to 'progs/glsl/reflect.vert')
-rw-r--r--progs/glsl/reflect.vert19
1 files changed, 19 insertions, 0 deletions
diff --git a/progs/glsl/reflect.vert b/progs/glsl/reflect.vert
new file mode 100644
index 00000000000..402be38bf7b
--- /dev/null
+++ b/progs/glsl/reflect.vert
@@ -0,0 +1,19 @@
+// Vertex shader for cube-texture reflection mapping
+// Brian Paul
+
+
+varying vec3 normal;
+
+void main()
+{
+ vec3 n = gl_NormalMatrix * gl_Normal;
+ vec3 u = normalize(vec3(gl_ModelViewMatrix * gl_Vertex));
+ float two_n_dot_u = 2.0 * dot(n, u);
+ vec4 f;
+ f.xyz = u - n * two_n_dot_u;
+
+ // outputs
+ normal = n;
+ gl_TexCoord[0] = gl_TextureMatrix[0] * f;
+ gl_Position = ftransform();
+}