OpenGL Programming Guide

Appendix BOpenGL State Variables

OpenGL State Variables

Lighting

See also Table 6-1 and Table 6-2 for initial values.

Table B-6 : Lighting State Variables

State Variable	Description	Attribute Group	Initial Value	Get Command
GL_LIGHTING	True if lighting is enabled	lighting /enable	GL_FALSE	glIsEnabled()
GL_COLOR_MATERIAL	True if color tracking is enabled	lighting	GL_FALSE	glIsEnabled()
GL_COLOR_MATERIAL_PARAME TER	Material properties tracking current color	lighting	GL_AMBIENT_ AND_DIFFUSE	glGetIntegerv()
GL_COLOR_MATERIAL_FACE	Face(s) affected by color tracking	lighting	GL_FRONT_ AND_BACK	glGetIntegerv()
GL_AMBIENT	Ambient material color	lighting	(0.2, 0.2, 0.2, 1.0)	glGetMaterialfv()
GL_DIFFUSE	Diffuse material color	lighting	(0.8, 0.8, 0.8, 1.0)	glGetMaterialfv()
GL_SPECULAR	Specular material color	lighting	(0.0, 0.0, 0.0, 1.0)	glGetMaterialfv()
GL_EMISSION	Emissive material color	lighting	(0.0, 0.0, 0.0, 1.0)	glGetMaterialfv()
GL_SHININESS	Specular exponent of material	lighting	0.0	glGetMaterialfv()
GL_LIGHT_MODEL_AMBIENT	Ambient scene color	lighting	(0.2, 0.2, 0.2, 1.0)	glGetFloatv()
GL_LIGHT_MODEL_LOCAL_VIE WER	Viewer is local	lighting	GL_FALSE	glGetBooleanv()
GL_LIGHT_MODEL_TWO_SIDE	Use two-sided lighting	lighting	GL_FALSE	glGetBooleanv()
GL_AMBIENT	Ambient intensity of light i	lighting	(0.0,0.0,0.0,1.0)	glGetLightfv()
GL_DIFFUSE	Diffuse intensity of light i	lighting	--	glGetLightfv()
GL_SPECULAR	Specular intensity of light i	lighting	--	glGetLightfv()
GL_POSITION	Position of light i	lighting	(0.0, 0.0, 1.0, 0.0)	glGetLightfv()
GL_CONSTANT_ATTENUATION	Constant attenuation factor	lighting	1.0	glGetLightfv()
GL_LINEAR_ATTENUATION	Linear attenuation factor	lighting	0.0	glGetLightfv()
GL_QUADRATIC_ATTENUATION	Quadratic attenuation factor	lighting	0.0	glGetLightfv()
GL_SPOT_DIRECTION	Spotlight direction of light i	lighting	(0.0, 0.0, -1.0)	glGetLightfv()
GL_SPOT_EXPONENT	Spotlight exponent of light i	lighting	0.0	glGetLightfv()
GL_SPOT_CUTOFF	Spotlight angle of light i	lighting	180.0	glGetLightfv()
GL_LIGHTi	True if light i enabled	lighting /enable	GL_FALSE	glIsEnabled()
GL_COLOR_INDEXES	ca, cd, and cs for color-index lighting	lighting /enable	0, 1, 1	glGetFloatv()

OpenGL Programming Guide