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#version 330 core
uniform vec3 light_color;
uniform vec3 light_pos;
uniform float ambient_light_strength;
uniform float specular_light_strength;
uniform uint specular_shininess;
vec3 calc_diffuse_light(in vec3 light_dir, in vec3 norm)
{
float diff = max(dot(norm, light_dir), 0.0);
return diff * light_color;
}
vec3 calc_specular_light(
in vec3 light_dir,
in vec3 norm,
in vec3 view_pos,
in vec3 frag_pos
)
{
vec3 view_direction = normalize(view_pos - frag_pos);
vec3 reflect_direction = reflect(-light_dir, norm);
float spec =
pow(max(dot(view_direction, reflect_direction), 0.0), specular_shininess);
return specular_light_strength * spec * light_color;
}
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