| /* |
| * Copyright (C) 2005 Oliver Hunt <ojh16@student.canterbury.ac.nz>. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
| * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| kernel vec4 basic(sampler inputNormalVectors, sampler inputLightVectors, __color inputLightingColor, float inputSurfaceScale, float inputSpecularConstant, |
| float inputSpecularExponent, float inputKernelUnitLengthX, float inputKernelUnitLengthY) |
| { |
| vec2 pos = samplerCoord(inputLightVectors); |
| vec2 posn = samplerCoord(inputNormalVectors); |
| vec3 l = sample(inputLightVectors, pos).xyz; |
| vec3 n = sample(inputNormalVectors, posn).xyz; |
| vec3 h = l+vec3(0.0, 0.0, 1.0); |
| h = normalize(h); |
| float nh = inputSpecularConstant*pow((dot(n, h)), inputSpecularExponent); |
| vec4 res = inputLightingColor * nh; |
| res.a = max(res.r, res.g); |
| res.a = max(res.a, res.b); |
| return res; |
| } |
