progs/glsl/skinning.vert

   1 // Vertex weighting/blendin shader
   2 // Brian Paul
   3 // 4 Nov 2008
   4
   5 uniform mat4 mat0, mat1;
   6 attribute float weight;
   7
   8 void main()
   9 {
  10    // simple diffuse shading
  11    // Note that we should really transform the normal vector along with
  12    // the postion below... someday.
  13    vec3 lightVec = vec3(0, 0, 1);
  14    vec3 norm = gl_NormalMatrix * gl_Normal;
  15    float dot = 0.2 + max(0.0, dot(norm, lightVec));
  16    gl_FrontColor = vec4(dot);
  17
  18    // compute sum of weighted transformations
  19    vec4 pos0 = mat0 * gl_Vertex;
  20    vec4 pos1 = mat1 * gl_Vertex;
  21    vec4 pos = mix(pos0, pos1, weight);
  22
  23    gl_Position = gl_ModelViewProjectionMatrix * pos;
  24 }