glEnableGLLIGHTING

glEnableGLLIGHTING is a function in the OpenGL graphics API that enables or disables the OpenGL lighting model. Lighting in OpenGL simulates the interaction of light sources with surfaces in a 3D scene. When lighting is enabled, OpenGL calculates the color of each pixel based on the surface's material properties, the position and type of light sources, and the viewer's position.

To use glDisableGLLIGHTING, you would typically call glEnable(GL_LIGHTING) to turn lighting on and glDisable(GL_LIGHTING) to turn it off. Before enabling lighting, several other OpenGL lighting functions need to be configured. These include defining the properties of light sources (e.g., ambient, diffuse, specular components, position) using functions like glLight, specifying material properties of objects (e.g., ambient, diffuse, specular, emissive colors, shininess) with glMaterial, and setting the lighting model parameters (e.g., ambient light intensity) with glLightModel.

When lighting is disabled, OpenGL resorts to a simpler rendering model where pixel colors are determined solely by the color specified for the primitive being drawn, or by texture mapping, without considering light interactions. This can be useful for rendering simple shapes, debugging, or achieving specific artistic effects. Proper management of the lighting state is crucial for creating realistic and visually appealing 3D graphics.