archipack_object.py 文件源码

def mouse_to_plane(self, context, event, origin=Vector((0, 0, 0)), normal=Vector((0, 0, 1))):
        """
            convert mouse pos to 3d point over plane defined by origin and normal
        """
        region = context.region
        rv3d = context.region_data
        co2d = (event.mouse_region_x, event.mouse_region_y)
        view_vector_mouse = region_2d_to_vector_3d(region, rv3d, co2d)
        ray_origin_mouse = region_2d_to_origin_3d(region, rv3d, co2d)
        pt = intersect_line_plane(ray_origin_mouse, ray_origin_mouse + view_vector_mouse,
           origin, normal, False)
        # fix issue with parallel plane
        if pt is None:
            pt = intersect_line_plane(ray_origin_mouse, ray_origin_mouse + view_vector_mouse,
                origin, view_vector_mouse, False)
        return pt