/// <summary>
/// Returns a new mesh by subtracting @lhs with @rhs.
/// </summary>
/// <param name="lhs">The base mesh of the boolean operation.</param>
/// <param name="rhs">The input mesh of the boolean operation.</param>
/// <returns>A new mesh if the operation succeeds, or null if an error occurs.</returns>
public static CSG_Model Subtract(GameObject lhs, GameObject rhs)
{
CSG_Model csg_model_a = new CSG_Model(lhs);
CSG_Model csg_model_b = new CSG_Model(rhs);
CSG_Node a = new CSG_Node(csg_model_a.ToPolygons());
CSG_Node b = new CSG_Node(csg_model_b.ToPolygons());
List <CSG_Polygon> polygons = CSG_Node.Subtract(a, b).AllPolygons();
return(new CSG_Model(polygons));
}
public static Mesh Subtract(Mesh lhs, Mesh rhs)
{
CSG_Model csg_model_a = new CSG_Model(lhs);
CSG_Model csg_model_b = new CSG_Model(rhs);
CSG_Node a = new CSG_Node(csg_model_a.ToPolygons());
CSG_Node b = new CSG_Node(csg_model_b.ToPolygons());
List <CSG_Polygon> polygons = CSG_Node.Subtract(a, b).AllPolygons();
CSG_Model result = new CSG_Model(polygons);
return(result.ToMesh());
}
internal CSG_Node render_tree()
{
if (operation == CSG_Operation.no_op)
{
CSG_Model csg_model_a = new CSG_Model(m);
current_object = new CSG_Node(csg_model_a.ToPolygons());
return(current_object);
}
else
{
switch (operation)
{
case CSG_Operation.Inner:
current_object = CSG_Node.Inner(left.render_tree());
return(current_object);
case CSG_Operation.Outer:
current_object = CSG_Node.Outer(left.render_tree());
return(current_object);
case CSG_Operation.On:
current_object = CSG_Node.On(left.render_tree());
return(current_object);
case CSG_Operation.Compliment:
current_object = CSG_Node.Compliment(left.render_tree());
return(current_object);
case CSG_Operation.Union:
current_object = CSG_Node.Union(left.render_tree(),
right.render_tree());
return(current_object);
case CSG_Operation.Intersect:
current_object = CSG_Node.Intersect(left.render_tree(),
right.render_tree());
return(current_object);
case CSG_Operation.Subtract:
current_object = CSG_Node.Subtract(left.render_tree(),
right.render_tree());
return(current_object);
}
}
return(null);
}