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varying vec4 diffuse,ambient;
varying vec3 normal,lightDir,halfVector;
/* From lighthouse3d */
void main()
{
/* first transform the normal into eye space and
normalize the result */
normal = normalize(gl_NormalMatrix * gl_Normal);
/* now normalize the light's direction. Note that
according to the OpenGL specification, the light
is stored in eye space. Also since we're talking about
a directional light, the position field is actually direction */
lightDir = normalize(vec3(gl_LightSource[0].position));
/* Normalize the halfVector to pass it to the fragment shader */
halfVector = normalize(gl_LightSource[0].halfVector.xyz);
/* Compute the diffuse, ambient and globalAmbient terms */
diffuse = gl_FrontMaterial.diffuse * gl_LightSource[0].diffuse;
ambient = gl_FrontMaterial.ambient * gl_LightSource[0].ambient;
ambient += gl_LightModel.ambient * gl_FrontMaterial.ambient;
gl_Position = ftransform();
}
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