OpenGL Programming Guide: The Official Guide to Learning OpenGL, Version 4.3, Eighth Edition

Vertex Colors

Let’s take a closer look at specifying color data with a vertex. Recall from Chapter 1 that vertices can have multiple data values associated with them, and colors can be among them. As with any other vertex data, the color data must be stored in a vertex-buffer object. In Example 4.1, we interleave the vertices’ color and position data, and use an integer-valued type to illustrate having OpenGL normalize our values.

Example 4.1. Specifying Vertex Color and Position Data: gouraud.cpp

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/////////////////////////////////////////////////////////////////////////// Gouraud.cpp/////////////////////////////////////////////////////////////////////////#include <iostream>using namespace std;#include "vgl.h"#include ...