To Next Page

To Previous Page

glLightModel

Chapter 10

254

glLightModel

glLightModelf, glLightModeli, glLightModelfv, glLightModeliv: set the

lighting model parameters.

C Speciﬁcation

void glLightModelf(

GLenum pname,

GLfloat param)

void glLightModeli(

GLenum pname,

GLint param)

void glLightModelfv(

GLenum pname,

const GLfloat *params)

void glLightModeliv(

GLenum pname,

const GLint *params)

Parameters

pname Speciﬁes a single-valued lighting model parameter.

GL_LIGHT_MODEL_LOCAL_VIEWER and

GL_LIGHT_MODEL_TWO_SIDE are accepted.

param Speciﬁes the value that param will be set to.

pname Speciﬁes a lighting model parameter. GL_LIGHT_MODEL_AMBIENT,

GL_LIGHT_MODEL_LOCAL_VIEWER, and

GL_LIGHT_MODEL_TWO_SIDE are accepted.

params Speciﬁes a pointer to the value or values that params will be set to.

Description

glLightModel sets the lighting model parameter. pname names a parameter and params

gives the new value. There are three lighting model parameters:

GL_LIGHT_MODEL_AMBIENT

params contains four integer or ﬂoating-point values that specify the ambient RGBA

intensity of the entire scene. Integer values are mapped linearly such that the most

positive representable value maps to 1.0, and the most negative representable value

maps to - 1.0. Floating-point values are mapped directly. Neither integer nor

ﬂoating-point values are clamped. The initial ambient scene intensity is (0.2, 0.2, 0.2,

1.0).

GL_LIGHT_MODEL_LOCAL_VIEWER

HP b2600 Reference Guide

Other manuals for HP b2600