blob: 7268c7d9c9225d530bc6a7775a68299efb34738f [file] [log] [blame]
/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the demonstration applications of the Qt Toolkit.
**
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varying vec3 position, normal;
varying vec4 specular, ambient, diffuse, lightDirection;
uniform sampler2D tex;
uniform sampler3D noise;
//const vec4 graniteColors[3] = {vec4(0.0, 0.0, 0.0, 1), vec4(0.30, 0.15, 0.10, 1), vec4(0.80, 0.70, 0.75, 1)};
uniform vec4 graniteColors[3];
float steep(float x)
{
return clamp(5.0 * x - 2.0, 0.0, 1.0);
}
void main()
{
vec2 turbulence = vec2(0, 0);
float scale = 1.0;
for (int i = 0; i < 4; ++i) {
turbulence += scale * (texture3D(noise, gl_TexCoord[1].xyz / scale).xy - 0.5);
scale *= 0.5;
}
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);
vec4 unlitColor = mix(graniteColors[1], mix(graniteColors[0], graniteColors[2], steep(0.5 + turbulence.y)), 4.0 * abs(turbulence.x));
gl_FragColor = (ambient + diffuse * max(NdotL, 0.0)) * unlitColor +
M.specular * specular * pow(max(RdotL, 0.0), M.shininess);
}