NAME

DoSurfaceShade − Create a surface shading primitive attribute object

SYNOPSIS

C:

DtObject DoSurfaceShade(object)
DtObject object;

Fortran:

INTEGER∗4 DOSRFS(OBJ)
INTEGER∗4 OBJ

DESCRIPTION

DoSurfaceShade allows the shading model to be selected on an object-by-object basis.  The call takes a single parameter, which is the object handle of the shader which you wish to apply to subsequent primitive objects. 

The two shaders provided for DcRealTime <DCRLTM> rendering are DcShaderConstant <DCSHCN>, which merely shades objects with their diffuse colors, and DcShaderLightSource <DCSHLS>, which shades using light sources.  The DcShaderConstant <DCSHCN> shader is slightly faster in some cases, and provides a simple “draw” mode as found in packages like GKS and PHIGS . 

September 29, 2021