1 files changed, 38 insertions, 0 deletions
diff --git a/progs/glsl/CH11-bumpmap.vert.txt b/progs/glsl/CH11-bumpmap.vert.txt
new file mode 100644
index 0000000000..d3d19f62ac
--- /dev/null
+++ b/progs/glsl/CH11-bumpmap.vert.txt
@@ -0,0 +1,38 @@
+//
+// Vertex shader for procedural bumps
+//
+// Authors: Randi Rost, John Kessenich
+//
+// Copyright (c) 2002-2006 3Dlabs Inc. Ltd. 
+//
+// See 3Dlabs-License.txt for license information
+//
+
+varying vec3 LightDir;
+varying vec3 EyeDir;
+
+uniform vec3 LightPosition;
+
+attribute vec3 Tangent;
+
+void main() 
+{
+    EyeDir         = vec3(gl_ModelViewMatrix * gl_Vertex);
+    gl_Position    = ftransform();
+    gl_TexCoord[0] = gl_MultiTexCoord0;
+
+    vec3 n = normalize(gl_NormalMatrix * gl_Normal);
+    vec3 t = normalize(gl_NormalMatrix * Tangent);
+    vec3 b = cross(n, t);
+
+    vec3 v;
+    v.x = dot(LightPosition, t);
+    v.y = dot(LightPosition, b);
+    v.z = dot(LightPosition, n);
+    LightDir = normalize(v);
+
+    v.x = dot(EyeDir, t);
+    v.y = dot(EyeDir, b);
+    v.z = dot(EyeDir, n);
+    EyeDir = normalize(v);
+}