NAME
vpGetMaterial - get material properties
SYNOPSIS
#include <volpack.h>
vpResult
vpGetMaterial(vpc, material, property, surface_side, r_ptr, g_ptr,
b_ptr)
vpContext *vpc;
int material;
int property;
int surface_side;
double *r_ptr, *g_ptr, *b_ptr;
ARGUMENTS
vpc VolPack context from vpCreateContext.
material
A constant specifying a particular material number
(VP_MATERIAL0, VP_MATERIAL1, ..., VP_MATERIAL5).
property
A constant specifying one material property (VP_AMBIENT,
VP_DIFFUSE, VP_SPECULAR or VP_SHINYNESS).
surface_side
A constant specifying one side of the material surface
(VP_EXTERIOR or VP_INTERIOR).
r_ptr, g_ptr, b_ptr
Locations to store the RGB components of the color associated
with the property. For VP_SHINYNESS, g_ptr and b_ptr are not
used.
DESCRIPTION
vpGetMaterial is used to get the properties of a material type. The
arguments are exactly analogous to vpSetMaterial except that the
surface_side argument may not be VP_BOTH_SIDES, and the final three
arguments are pointers to locations for storing the material
properties.
ERRORS
The normal return value is VP_OK. The following error return values
are possible:
VPERROR_BAD_VALUE
The material number is invalid.
VPERROR_BAD_OPTION
Either the surface_side or property arguments are invalid.
SEE ALSO
VolPack(3), vpCreateContext(3), vpSetMaterial(3)