glVertexAttrib4f0
glVertexAttrib4f is an OpenGL function used to specify a constant value for a generic vertex attribute. Its purpose is to set the current attribute value for a given attribute index, so that the shader can read a fixed vector when per-vertex data is not supplied.
The standard signature is glVertexAttrib4f(index, x, y, z, w), where index is the generic attribute location (an
When a vertex attribute array is enabled for the given index (via glEnableVertexAttribArray), vertex attribute data
Common use cases include supplying a fixed attribute to shaders, such as a constant color, normal, or
Note that there is no standard function named glVertexAttrib4f0; the correct form to set a constant attribute