Changeset 3876 for data/branches/atmospheric_engine/shaders/cloud.vert

Timestamp:

Jun 22, 2006, 4:09:40 PM (18 years ago)

Author:

hdavid

Message:

 

File:

• data/branches/atmospheric_engine/shaders/cloud.vert (modified) (1 diff)

data/branches/atmospheric_engine/shaders/cloud.vert

@@ +1 @@
+//
 // Vertex shader for producing animated clouds (mostly cloudy)
+//
+// Authors: John Kessenich, Randi Rost
+//
+// Copyright (c) 2002-2004 3Dlabs Inc. Ltd. 
+//
+// See 3Dlabs-License.txt for license information
+//
 
 varying float LightIntensity;
 varying vec3  MCposition;
 
+uniform vec3  LightPos;
 uniform float Scale;
 
 void main(void)
 {
-    vec3 ECposition = vec3 (gl_ModelViewMatrix * gl_Vertex);
-    MCposition      = vec3 (gl_Vertex) * Scale;
-    vec3 tnorm      = normalize(vec3 (gl_NormalMatrix * gl_Normal));
-    LightIntensity = 1;
-    gl_Position     = ftransform();
+  vec3 ECposition = vec3 (gl_ModelViewMatrix * gl_Vertex);
+  MCposition      = vec3 (gl_Vertex) * Scale;
+  vec3 tnorm      = normalize(vec3 (gl_NormalMatrix * gl_Normal));
+  LightIntensity  = dot(normalize(LightPos - ECposition), tnorm);
+  LightIntensity = 1.0;
+  gl_Position     = ftransform();
 }