public static void SavePolygon(string filename, bool writeHoleFlags, GpcPolygon polygon)
{
gpc_polygon gpc_polygon = GpcWrapper.PolygonTo_gpc_polygon(polygon);
IntPtr fp = fopen(filename, "wb");
gpc_write_polygon(fp, writeHoleFlags?((int)1):((int)0), ref gpc_polygon);
fclose(fp);
GpcWrapper.Free_gpc_polygon(gpc_polygon);
}
public static Tristrip PolygonToTristrip(GpcPolygon polygon)
{
gpc_tristrip gpc_strip = new gpc_tristrip();
gpc_polygon gpc_pol = GpcWrapper.PolygonTo_gpc_polygon(polygon);
gpc_polygon_to_tristrip(ref gpc_pol, ref gpc_strip);
Tristrip tristrip = GpcWrapper.gpc_strip_ToTristrip(gpc_strip);
GpcWrapper.Free_gpc_polygon(gpc_pol);
GpcWrapper.gpc_free_tristrip(ref gpc_strip);
return(tristrip);
}
public static GpcPolygon Clip(GpcOperation operation, GpcPolygon subject_polygon, GpcPolygon clip_polygon)
{
gpc_polygon gpc_polygon = new gpc_polygon();
gpc_polygon gpc_subject_polygon = GpcWrapper.PolygonTo_gpc_polygon(subject_polygon);
gpc_polygon gpc_clip_polygon = GpcWrapper.PolygonTo_gpc_polygon(clip_polygon);
gpc_polygon_clip(operation, ref gpc_subject_polygon, ref gpc_clip_polygon, ref gpc_polygon);
GpcPolygon polygon = GpcWrapper.gpc_polygon_ToPolygon(gpc_polygon);
GpcWrapper.Free_gpc_polygon(gpc_subject_polygon);
GpcWrapper.Free_gpc_polygon(gpc_clip_polygon);
GpcWrapper.gpc_free_polygon(ref gpc_polygon);
return(polygon);
}
public static Tristrip ClipToTristrip(GpcOperation operation, GpcPolygon subject_polygon, GpcPolygon clip_polygon)
{
gpc_tristrip gpc_strip = new gpc_tristrip();
gpc_polygon gpc_subject_polygon = GpcWrapper.PolygonTo_gpc_polygon(subject_polygon);
gpc_polygon gpc_clip_polygon = GpcWrapper.PolygonTo_gpc_polygon(clip_polygon);
gpc_tristrip_clip(operation, ref gpc_subject_polygon, ref gpc_clip_polygon, ref gpc_strip);
Tristrip tristrip = GpcWrapper.gpc_strip_ToTristrip(gpc_strip);
GpcWrapper.Free_gpc_polygon(gpc_subject_polygon);
GpcWrapper.Free_gpc_polygon(gpc_clip_polygon);
GpcWrapper.gpc_free_tristrip(ref gpc_strip);
return(tristrip);
}