EZ_DefineLight(3) EZWGL Functions EZ_DefineLight(3)NAME
EZ_DefineLightSrc, EZ_BindLightSrc - define light source parameters
SYNOPSIS
#include <EZ.h>
EZ_LightSrc *EZ_DefineLightSrc(float *parameters)
void EZ_BindLightSrc(int num, EZ_LightSrc *lsrc)
ARGUMENTS
parameters Specifies light source properties.
num Specifies a light source, must be an integer between 0 and 7.
lsrc Specifies a pre-defined light source.
DESCRIPTIONEZ_DefineLightSrc defines a light source based on the specified parame‐
ters. The defined light source can later be binded to one of the 8
light sources.
parameters specifies an array of floating point symbols and values that
defines the light source properties. parameters must contain a
sequence of lighting symbols, each followed by the appropriate number
of floating point values. The last symbol must be EZ_NULL_F, which is
itself not followed by any values.
The symbols are:
EZ_POSITION_F specifies the position of the light source, must fol‐
lowed by 4 floating point numbers that defines the position of the
light source.
EZ_AMBIENT_F specifies the ambient color of the light source, must
followed by 4 floats in the range [0.0, 1.0] that specify the inten‐
sity of the RGBA components of the color.
EZ_DIFFUSE_F specifies the diffuse color of the light source, must
followed by 4 floats in the range [0.0, 1.0] that specify the inten‐
sity of the RGBA components of the color.
EZ_SPECULAR_F specifies the specular color of the light source, must
followed by 4 floats in the range [0.0, 1.0] that specify the inten‐
sity of the RGBA components of the color.
EZ_SPOT_DIRECTION_F specifies the spot direction of a spot light
source, must followed by 4 floats that specify the spot direction.
EZ_SPOT_EXPONENT_F specifies the spot exponent, must followed by a
non-negative floating point number that specifies the spot exponent.
EZ_SPOT_CUTOFF_F specifies the spot cutoff angle, must followed by
an angle in degrees between 0.0 and 180.0.
EZ_CONSTANT_ATTENUATION_F specifies the constant attenuation coeffi‐
cient, must followed by a floating point number that specifies the
attenuation factor.
EZ_LINEAR_ATTENUATION_F specifies the linear attenuation coeffi‐
cient, must followed by a floating point number that specifies the
attenuation factor.
EZ_QUADRATIC_ATTENUATION_F specifies the quadratic attenuation coef‐
ficient, must followed by a floating point number that specifies the
attenuation factor.
EZ_BindLightSrc binds the specified pre-defined light source property
to the specified light source.
SEE ALSOEZ_DefineMaterial(3), EZ_DefineLightModel(3), EZ_BindMaterial(3),
EZ_BindLightModel(3)EZWGLEZ_DefineLight(3)
