EZ_DefineLightModel

EZ_DefineLightModel(3)          EZWGL Functions         EZ_DefineLightModel(3)



NAME
       EZ_DefineLightModel, EZ_BindLightModel - define a lighting model


SYNOPSIS
       #include <EZ.h>

       EZ_LightModel *EZ_DefineLightModel(float *parameters)
       void EZ_BindLightModel(EZ_LightModel *lmodel)


ARGUMENTS
       parameters  Specifies material properties.

       lmodel Specifies a pre-defined lighting model.



DESCRIPTION
       EZ_DefineLightModel defines a lighting model based on the specified
       parameters. The defined lighting model can later be bind the current
       lighting model.

       parameters specifies an array of floating point symbols and values that
       defines the lighting model 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_LIGHT_MODEL_AMBIENT_F specifies the ambient color of the lighting
          model, Must followed by 4 floats in the range [0.0, 1.0] that
          specify the intensity of the RGBA components of the ambient color.

          EZ_LIGHT_MODEL_LOCAL_VIEWER_F specifies whether reflection
          calculations are done based on a local or infinitely distant
          viewpoint.  It must be followed by a single floating point value,
          which must be either 0.0 or 1.0.

          EZ_LIGHT_MODEL_TWO_SIDE_F specifies whether lighting calculations
          are done assuming that only frontfacing polygons are visible, or are
          corrected for each polygon based on whether it is frontfacing or
          backfacing. It must be followed by a single floating point value,
          which must be either 0.0 or 1.0. The value 1.0 specifies a lighting
          model that is correct for both frontfacing and backfacing polygons.
          In this case, vertex normals are reversed for all vertices of
          backfacing polygons and the back-material is used to color
          backfacing polygons.

       EZ_BindLightModel binds the specified pre-defined lighting model to the
       current lighting model.


SEE ALSO
       EZ_DefineLightSrc(3), EZ_DefineMaterial(3), EZ_BindLightSrc(3),
       EZ_BindMaterial(3)



EZWGL                                                   EZ_DefineLightModel(3)