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| 1 |
| 2 /* |
| 3 ** Copyright (c) 2012 The Khronos Group Inc. |
| 4 ** |
| 5 ** Permission is hereby granted, free of charge, to any person obtaining a |
| 6 ** copy of this software and/or associated documentation files (the |
| 7 ** "Materials"), to deal in the Materials without restriction, including |
| 8 ** without limitation the rights to use, copy, modify, merge, publish, |
| 9 ** distribute, sublicense, and/or sell copies of the Materials, and to |
| 10 ** permit persons to whom the Materials are furnished to do so, subject to |
| 11 ** the following conditions: |
| 12 ** |
| 13 ** The above copyright notice and this permission notice shall be included |
| 14 ** in all copies or substantial portions of the Materials. |
| 15 ** |
| 16 ** THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| 17 ** EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 18 ** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. |
| 19 ** IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY |
| 20 ** CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, |
| 21 ** TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE |
| 22 ** MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS. |
| 23 */ |
| 24 |
| 25 |
| 26 attribute vec4 gtf_Vertex; |
| 27 attribute vec3 gtf_Normal; |
| 28 attribute mat3 myAttrib3m; |
| 29 |
| 30 uniform mat3 gtf_NormalMatrix; |
| 31 varying float lightIntensity; |
| 32 varying vec3 Position; |
| 33 uniform vec3 LightPosition; |
| 34 |
| 35 uniform mat4 gtf_ModelViewMatrix; |
| 36 uniform mat4 gtf_ModelViewProjectionMatrix; |
| 37 |
| 38 const float specularContribution = 0.7; |
| 39 const float diffuseContribution = (1.0 - specularContribution); |
| 40 |
| 41 void main(void) { |
| 42 vec4 pos = gtf_ModelViewMatrix * gtf_Vertex; |
| 43 Position = vec3(gtf_Vertex); |
| 44 vec3 tnorm = normalize(gtf_NormalMatrix * gtf_Normal); |
| 45 vec3 lightVec = normalize(LightPosition - vec3(pos)); |
| 46 vec3 reflectVec = reflect(lightVec, tnorm); |
| 47 vec3 viewVec = normalize(vec3(pos)); |
| 48 |
| 49 float f = myAttrib3m[0][0]; |
| 50 |
| 51 float spec = clamp(dot(reflectVec, viewVec), f, 1.0); |
| 52 //float spec = clamp(dot(reflectVec, viewVec), myAttribute1, myAttribute
2); |
| 53 spec = spec * spec; |
| 54 spec = spec * spec; |
| 55 spec = spec * spec; |
| 56 spec = spec * spec; |
| 57 |
| 58 lightIntensity = diffuseContribution * dot(lightVec, tnorm) + |
| 59 specularContribution * spec; |
| 60 |
| 61 gl_Position = gtf_ModelViewProjectionMatrix * gtf_Vertex; |
| 62 } |
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