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//
// Vertex shader for testing the discard command
//
// Author: OGLSL implementation by Ian Nurse
//
// Copyright (C) 2002-2004 LightWork Design Ltd.
// www.lightworkdesign.com
//
// See LightworkDesign-License.txt for license information
//
uniform vec3 LightPosition;
uniform vec3 LightColor;
uniform vec3 EyePosition;
uniform vec3 Specular;
uniform vec3 Ambient;
uniform float Kd;
varying vec3 DiffuseColor;
varying vec3 SpecularColor;
void main(void)
{
vec3 ecPosition = vec3 (gl_ModelViewMatrix * gl_Vertex);
vec3 tnorm = normalize(gl_NormalMatrix * gl_Normal);
vec3 lightVec = normalize(LightPosition - ecPosition);
vec3 viewVec = normalize(EyePosition - ecPosition);
vec3 Hvec = normalize(viewVec + lightVec);
float spec = abs(dot(Hvec, tnorm));
spec = pow(spec, 16.0);
DiffuseColor = LightColor * vec3 (Kd * abs(dot(lightVec, tnorm)));
DiffuseColor = clamp(Ambient + DiffuseColor, 0.0, 1.0);
SpecularColor = clamp((LightColor * Specular * spec), 0.0, 1.0);
gl_TexCoord[0] = gl_MultiTexCoord0;
gl_Position = ftransform();
}
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