| |
| /* |
| ** 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 |
| varying vec4 color; |
| |
| float lerp(float a, float b, float s) |
| { |
| return a + (b - a) * s; |
| } |
| |
| void main (void) |
| { |
| float sinValues[17]; |
| sinValues[0] = 0.0; |
| sinValues[1] = 0.382683; |
| sinValues[2] = 0.707107; |
| sinValues[3] = 0.92388; |
| sinValues[4] = 1.0; |
| sinValues[5] = 0.92388; |
| sinValues[6] = 0.707107; |
| sinValues[7] = 0.382683; |
| sinValues[8] = 0.0; |
| sinValues[9] = -0.382683; |
| sinValues[10] = -0.707107; |
| sinValues[11] = -0.92388; |
| sinValues[12] = -1.0; |
| sinValues[13] = -0.923879; |
| sinValues[14] = -0.707107; |
| sinValues[15] = -0.382683; |
| sinValues[16] = 0.0; |
| |
| const float M_PI = 3.14159265358979323846; |
| vec3 c = 2.0 * M_PI * color.rgb; |
| |
| vec3 arrVal = c * 2.546478971; |
| int arr0x = int(floor(arrVal.x)); |
| int arr0y = int(floor(arrVal.y)); |
| int arr0z = int(floor(arrVal.z)); |
| vec3 weight = arrVal - floor(arrVal); |
| vec3 sin_c = vec3(0.0, 0.0, 0.0); |
| |
| if (arr0x == 0) |
| sin_c.x = lerp(sinValues[0], sinValues[1], weight.x); |
| else if (arr0x == 1) |
| sin_c.x = lerp(sinValues[1], sinValues[2], weight.x); |
| else if (arr0x == 2) |
| sin_c.x = lerp(sinValues[2], sinValues[3], weight.x); |
| else if (arr0x == 3) |
| sin_c.x = lerp(sinValues[3], sinValues[4], weight.x); |
| else if (arr0x == 4) |
| sin_c.x = lerp(sinValues[4], sinValues[5], weight.x); |
| else if (arr0x == 5) |
| sin_c.x = lerp(sinValues[5], sinValues[6], weight.x); |
| else if (arr0x == 6) |
| sin_c.x = lerp(sinValues[6], sinValues[7], weight.x); |
| else if (arr0x == 7) |
| sin_c.x = lerp(sinValues[7], sinValues[8], weight.x); |
| else if (arr0x == 8) |
| sin_c.x = lerp(sinValues[8], sinValues[9], weight.x); |
| else if (arr0x == 9) |
| sin_c.x = lerp(sinValues[9], sinValues[10], weight.x); |
| else if (arr0x == 10) |
| sin_c.x = lerp(sinValues[10], sinValues[11], weight.x); |
| else if (arr0x == 11) |
| sin_c.x = lerp(sinValues[11], sinValues[12], weight.x); |
| else if (arr0x == 12) |
| sin_c.x = lerp(sinValues[12], sinValues[13], weight.x); |
| else if (arr0x == 13) |
| sin_c.x = lerp(sinValues[13], sinValues[14], weight.x); |
| else if (arr0x == 14) |
| sin_c.x = lerp(sinValues[14], sinValues[15], weight.x); |
| else if (arr0x == 15) |
| sin_c.x = lerp(sinValues[15], sinValues[16], weight.x); |
| else if (arr0x == 16) |
| sin_c.x = sinValues[16]; |
| |
| if (arr0y == 0) |
| sin_c.y = lerp(sinValues[0], sinValues[1], weight.y); |
| else if (arr0y == 1) |
| sin_c.y = lerp(sinValues[1], sinValues[2], weight.y); |
| else if (arr0y == 2) |
| sin_c.y = lerp(sinValues[2], sinValues[3], weight.y); |
| else if (arr0y == 3) |
| sin_c.y = lerp(sinValues[3], sinValues[4], weight.y); |
| else if (arr0y == 4) |
| sin_c.y = lerp(sinValues[4], sinValues[5], weight.y); |
| else if (arr0y == 5) |
| sin_c.y = lerp(sinValues[5], sinValues[6], weight.y); |
| else if (arr0y == 6) |
| sin_c.y = lerp(sinValues[6], sinValues[7], weight.y); |
| else if (arr0y == 7) |
| sin_c.y = lerp(sinValues[7], sinValues[8], weight.y); |
| else if (arr0y == 8) |
| sin_c.y = lerp(sinValues[8], sinValues[9], weight.y); |
| else if (arr0y == 9) |
| sin_c.y = lerp(sinValues[9], sinValues[10], weight.y); |
| else if (arr0y == 10) |
| sin_c.y = lerp(sinValues[10], sinValues[11], weight.y); |
| else if (arr0y == 11) |
| sin_c.y = lerp(sinValues[11], sinValues[12], weight.y); |
| else if (arr0y == 12) |
| sin_c.y = lerp(sinValues[12], sinValues[13], weight.y); |
| else if (arr0y == 13) |
| sin_c.y = lerp(sinValues[13], sinValues[14], weight.y); |
| else if (arr0y == 14) |
| sin_c.y = lerp(sinValues[14], sinValues[15], weight.y); |
| else if (arr0y == 15) |
| sin_c.y = lerp(sinValues[15], sinValues[16], weight.y); |
| else if (arr0y == 16) |
| sin_c.y = sinValues[16]; |
| |
| if (arr0z == 0) |
| sin_c.z = lerp(sinValues[0], sinValues[1], weight.z); |
| else if (arr0z == 1) |
| sin_c.z = lerp(sinValues[1], sinValues[2], weight.z); |
| else if (arr0z == 2) |
| sin_c.z = lerp(sinValues[2], sinValues[3], weight.z); |
| else if (arr0z == 3) |
| sin_c.z = lerp(sinValues[3], sinValues[4], weight.z); |
| else if (arr0z == 4) |
| sin_c.z = lerp(sinValues[4], sinValues[5], weight.z); |
| else if (arr0z == 5) |
| sin_c.z = lerp(sinValues[5], sinValues[6], weight.z); |
| else if (arr0z == 6) |
| sin_c.z = lerp(sinValues[6], sinValues[7], weight.z); |
| else if (arr0z == 7) |
| sin_c.z = lerp(sinValues[7], sinValues[8], weight.z); |
| else if (arr0z == 8) |
| sin_c.z = lerp(sinValues[8], sinValues[9], weight.z); |
| else if (arr0z == 9) |
| sin_c.z = lerp(sinValues[9], sinValues[10], weight.z); |
| else if (arr0z == 10) |
| sin_c.z = lerp(sinValues[10], sinValues[11], weight.z); |
| else if (arr0z == 11) |
| sin_c.z = lerp(sinValues[11], sinValues[12], weight.z); |
| else if (arr0z == 12) |
| sin_c.z = lerp(sinValues[12], sinValues[13], weight.z); |
| else if (arr0z == 13) |
| sin_c.z = lerp(sinValues[13], sinValues[14], weight.z); |
| else if (arr0z == 14) |
| sin_c.z = lerp(sinValues[14], sinValues[15], weight.z); |
| else if (arr0z == 15) |
| sin_c.z = lerp(sinValues[15], sinValues[16], weight.z); |
| else if (arr0z == 16) |
| sin_c.z = sinValues[16]; |
| |
| gl_FragColor = vec4(0.5 * sin_c + 0.5, 1.0); |
| } |