Pro/E獲取數據之二：獲取圓錐角度

/*===============================================================*\
FUNCTION: UserConeAngDisp()
PURPOSE:  Display the angle of the selected cone.
\*===============================================================*/
int UserConeAngDisp()
{
	int               sel_count;
	double            angle;
	ProError          status;
	ProModelitem      p_mdl_item;
	ProFileName       msgfile;
	ProGeomitemdata  *geom_data = NULL;
	ProSurface        surface;
	ProSrftype        surface_type;
	ProSelection     *psels = NULL;
	/*------------------------------------------------*\
	Prompt the user to select a cone.
	\*-------------------------------------------------*/
	ProStringToWstring (msgfile, "Message.txt");
	status = ProMessageDisplay (msgfile,
		"UG7 Select Cone to Evaluate:");
	if ((ProSelect ("surface", 1, NULL, NULL, NULL, NULL, &psels,
		&sel_count) != PRO_TK_NO_ERROR) || (sel_count < 1))
		return ((int)PRO_TK_GENERAL_ERROR);

	status = ProSelectionModelitemGet (psels[0], &p_mdl_item);
	status = ProGeomitemToSurface (&p_mdl_item, &surface);
	status = ProSurfaceTypeGet (surface, &surface_type);
	if (surface_type != PRO_SRF_CONE)
	{
		ProMessageDisplay (msgfile,
			"UG7 Surface selected is not a Cone");
		return ((int)PRO_TK_GENERAL_ERROR);
	}

	status = ProGeomitemdataGet(&p_mdl_item,&geom_data);
	angle = 
fabs(geom_data->data.p_surface_data->srf_shape.cone.alpha*180.0/PI);
	status = ProMessageDisplay (msgfile,
		"UG7 Cone angle is %0f",&angle);
	return ((int)status);
}