GetMaterial (3)

#include <volpack.h>

\$1 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;

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.

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.

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.

VolPack(3), vpCreateContext(3), vpSetMaterial(3)