public void BuildWall(Plane p)
{
ShapeBuilder shapebuilder = new ShapeBuilder(model);
Matrix transform = GetTransform();
Vector2[] points = shapebuilder.GetShape(ref transform, p);
shape = new Shape(points, false);
offset = shape.GetCenter() - new Vector2(position.X, position.Y);
shape.CenterAtZero();
body = new Body(shape, float.MaxValue);
body.position.X = position.X + offset.X;
body.position.Y = position.Y + offset.Y;
body.is_static = true;
body.Update(0);
}