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uniform sampler2D DistanceMap;
varying vec3 vertex_normal;
varying vec4 vertex_position;
void main()
{
const vec4 lightAmbient = vec4(0.1, 0.1, 0.1, 1.0);
const vec4 lightSpecular = vec4(0.8, 0.8, 0.8, 1.0);
const vec4 matAmbient = vec4(0.2, 0.2, 0.2, 1.0);
const vec4 matSpecular = vec4(1.0, 1.0, 1.0, 1.0);
const float matShininess = 100.0;
vec3 eye_direction = normalize(-vertex_position.xyz);
vec3 light_direction = normalize(LightSourcePosition.xyz/LightSourcePosition.w -
vertex_position.xyz/vertex_position.w);
vec3 normalized_normal = normalize(vertex_normal);
vec3 reflection = reflect(-light_direction, normalized_normal);
float specularTerm = pow(max(0.0, dot(reflection, eye_direction)), matShininess);
float diffuseTerm = max(0.0, dot(normalized_normal, light_direction));
vec4 specular = (lightSpecular * matSpecular);
vec4 ambient = (lightAmbient * matAmbient);
vec4 diffuse = (LightColor * MaterialDiffuse);
gl_FragColor = (specular * specularTerm) + ambient + (diffuse * diffuseTerm);
}
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