Opengl, Computer Graphics, Shaders, Texture, Shading.
vec4 specular = vec4(1.0, 1.0, 1.0, 1.0); GLfloat shiness = 100.0; 5. Back face visibility In most cases, an object is opaque and there is no case to see back face of the object. But, If an object has transparent faces like a mirror, Normal vector of back face become similar to direction of front