| |
| /* |
| ** Copyright (c) 2012 The Khronos Group Inc. |
| ** |
| ** Permission is hereby granted, free of charge, to any person obtaining a |
| ** copy of this software and/or associated documentation files (the |
| ** "Materials"), to deal in the Materials without restriction, including |
| ** without limitation the rights to use, copy, modify, merge, publish, |
| ** distribute, sublicense, and/or sell copies of the Materials, and to |
| ** permit persons to whom the Materials are furnished to do so, subject to |
| ** the following conditions: |
| ** |
| ** The above copyright notice and this permission notice shall be included |
| ** in all copies or substantial portions of the Materials. |
| ** |
| ** THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| ** EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| ** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. |
| ** IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY |
| ** CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, |
| ** TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE |
| ** MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS. |
| */ |
| |
| |
| #ifdef GL_ES |
| precision mediump float; |
| #endif |
| uniform float mortarThickness; |
| uniform vec3 brickColor; |
| uniform vec3 mortarColor; |
| |
| uniform float brickMortarWidth; |
| uniform float brickMortarHeight; |
| uniform float mwf; |
| uniform float mhf; |
| |
| varying vec3 Position; |
| varying float lightIntensity; |
| |
| void main (void) |
| { |
| vec3 ct; |
| float ss, tt, w, h; |
| |
| vec3 pos = Position; |
| |
| ss = pos.x / brickMortarWidth; |
| tt = pos.z / brickMortarHeight; |
| |
| if (fract (tt * 0.5) > 0.5) |
| ss += 0.5; |
| |
| ss = fract (ss); |
| tt = fract (tt); |
| |
| w = step (mwf, ss) - step (1.0 - mwf, ss); |
| h = step (mhf, tt) - step (1.0 - mhf, tt); |
| |
| ct = clamp(mix (mortarColor, brickColor, w * h) * lightIntensity, 0.0, 1.0); |
| |
| gl_FragColor = vec4 (ct, 1.0); |
| } |