Imported Upstream version 2012.12HEADupstream/2012.12upstreammaster

1 files changed, 30 insertions, 0 deletions

diff --git a/data/shaders/light-basic-texgen.vert b/data/shaders/light-basic-texgen.vert
new file mode 100644
index 0000000..6198a64
--- /dev/null
+++ b/data/shaders/light-basic-texgen.vert
@@ -0,0 +1,30 @@
+attribute vec3 position;
+attribute vec3 normal;
+
+uniform mat4 ModelViewProjectionMatrix;
+uniform mat4 NormalMatrix;
+uniform vec3 CenterPoint;
+
+varying vec4 Color;
+varying vec2 TextureCoord;
+
+void main(void)
+{
+    // Transform the normal to eye coordinates
+    vec3 N = normalize(vec3(NormalMatrix * vec4(normal, 1.0)));
+
+    // The LightSourcePosition is actually its direction for directional light
+    vec3 L = normalize(LightSourcePosition.xyz);
+
+    // Multiply the diffuse value by the vertex color (which is fixed in this case)
+    // to get the actual color that we will use to draw this vertex with
+    float diffuse = max(dot(N, L), 0.0);
+    Color = vec4(diffuse * MaterialDiffuse.rgb, MaterialDiffuse.a);
+
+    // Compute the texture coordinate and as a varying
+    vec3 vnorm = normalize(position - CenterPoint);
+    TextureCoord = asin(vnorm.xy) / PI + 0.5;
+
+    // Transform the position to clip coordinates
+    gl_Position = ModelViewProjectionMatrix * vec4(position, 1.0);
+}