1. Introduction Gauche-gl is an extension module of Gauche Scheme implementation. It provides the following modules: gl This module provides bindings to OpenGL API. It covers most functions in OpenGL 1.0 through 2.0, and GLU. The functions are described in OpenGL API. gl.glut This module provides bindings to most functions in GLUT. The functions are described in GLUT API. gl.math3d This module pro