For each 3DCanvas, there is a clear color. It is used
by EZ_Clear
to reset the draw buffer.
void EZ_ClearColorf(float r, float g, float b)
This function sets the clear color in RGB mode.
void EZ_ClearIndex(ind idx)
This function sets the clear color in color map mode.
void EZ_Clear(ind mode)
This function clears the specified buffers.