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#version 120
uniform sampler2D textureA;
uniform vec4 color_ambient;
uniform vec4 color_diffuse;
uniform vec4 color_specular;
uniform float shininess;
uniform int level;
void main (void) {
vec4 normal = texture2DLod (textureA, gl_TexCoord[0].st, float(level)).xyzw;
//vec4 normal = texture2D (textureA, gl_TexCoord[0].st).xyzw;
vec4 color = vec4(1.0);
if (normal.a != 0.0) {
normal = normalize(normal);
if (shininess == 99.0) {
color.rgb = normal.rgb;
}
else {
vec3 lightDir = normalize(vec3(gl_LightSource[0].position));
color = color_ambient * (gl_LightSource[0].ambient + gl_LightModel.ambient);
float NdotL = max(dot(normal.xyz, lightDir.xyz), 0.0);
//color += diffuse[material] * gl_LightSource[0].diffuse * NdotL;
if (NdotL > 0.0) {
color += color_diffuse * gl_LightSource[0].diffuse * NdotL;
float NdotHV = max(dot(normal.xyz, gl_LightSource[0].halfVector.xyz), 0.0);
color += color_specular * gl_LightSource[0].specular * pow(NdotHV, shininess);
}
}
color.a = 1.0;
}
else
discard;
//color = vec4(0.8, 0.8, 0.8, 0.0);
gl_FragColor = color;
}
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