| Brian Paul | aab429c | 2008-11-04 16:56:59 -0700 | [diff] [blame] | 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 | } |