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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 #ifdef GL_ES |
| 27 precision mediump float; |
| 28 #endif |
| 29 uniform float mortarThickness; |
| 30 uniform vec3 brickColor; |
| 31 uniform vec3 mortarColor; |
| 32 |
| 33 uniform float brickMortarWidth; |
| 34 uniform float brickMortarHeight; |
| 35 uniform float mwf; |
| 36 uniform float mhf; |
| 37 |
| 38 varying vec3 Position; |
| 39 varying float lightIntensity; |
| 40 |
| 41 void main (void) |
| 42 { |
| 43 vec3 ct; |
| 44 float ss, tt, w, h; |
| 45 |
| 46 vec3 pos = Position; |
| 47 |
| 48 ss = pos.x / brickMortarWidth; |
| 49 tt = pos.z / brickMortarHeight; |
| 50 |
| 51 if (fract (tt * 0.5) > 0.5) |
| 52 ss += 0.5; |
| 53 |
| 54 ss = fract (ss); |
| 55 tt = fract (tt); |
| 56 |
| 57 w = step (mwf, ss) - step (1.0 - mwf, ss); |
| 58 h = step (mhf, tt) - step (1.0 - mhf, tt); |
| 59 |
| 60 ct = clamp(mix (mortarColor, brickColor, w * h) * lightIntensity, 0.0, 1.0); |
| 61 |
| 62 gl_FragColor = vec4 (ct, 1.0); |
| 63 } |
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