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Diffstat (limited to 'demos/boxes/fresnel.fsh')
-rw-r--r-- | demos/boxes/fresnel.fsh | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/demos/boxes/fresnel.fsh b/demos/boxes/fresnel.fsh new file mode 100644 index 0000000..dd98061 --- /dev/null +++ b/demos/boxes/fresnel.fsh @@ -0,0 +1,79 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Qt Software Information (qt-info@nokia.com) +** +** This file is part of the demonstration applications of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the either Technology Preview License Agreement or the +** Beta Release License Agreement. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 2.1 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 2.1 requirements +** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain +** additional rights. These rights are described in the Nokia Qt LGPL +** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this +** package. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 3.0 as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU General Public License version 3.0 requirements will be +** met: http://www.gnu.org/copyleft/gpl.html. +** +** If you are unsure which license is appropriate for your use, please +** contact the sales department at qt-sales@nokia.com. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +varying vec3 position, normal; +varying vec4 specular, ambient, diffuse, lightDirection; + +uniform sampler2D tex; +uniform samplerCube env; +uniform mat4 view; +uniform vec4 basicColor; + +void main() +{ + vec3 N = normalize(normal); + // assume directional light + + gl_MaterialParameters M = gl_FrontMaterial; + + float NdotL = dot(N, lightDirection.xyz); + float RdotL = dot(reflect(normalize(position), N), lightDirection.xyz); + + vec3 absN = abs(gl_TexCoord[1].xyz); + vec3 texCoord; + if (absN.x > absN.y && absN.x > absN.z) + texCoord = gl_TexCoord[1].yzx; + else if (absN.y > absN.z) + texCoord = gl_TexCoord[1].zxy; + else + texCoord = gl_TexCoord[1].xyz; + texCoord.y *= -sign(texCoord.z); + texCoord += 0.5; + + vec4 texColor = texture2D(tex, texCoord.xy); + vec4 unlitColor = gl_Color * mix(basicColor, vec4(texColor.xyz, 1.0), texColor.w); + vec4 litColor = (ambient + diffuse * max(NdotL, 0.0)) * unlitColor + + M.specular * specular * pow(max(RdotL, 0.0), M.shininess); + + vec3 R = 2.0 * dot(-position, N) * N + position; + vec4 reflectedColor = textureCube(env, R * mat3(view[0].xyz, view[1].xyz, view[2].xyz)); + gl_FragColor = mix(litColor, reflectedColor, 0.2 + 0.8 * pow(1.0 + dot(N, normalize(position)), 2.0)); +} |