You may want to purchase a small wood or meshgrid from the hardware or craft store for it to climb on.
或许你得从工具点或是工艺品店去买一小块木头或是格子什么的让它去攀爬。
2
You will get some sort of meshgrid on your surface and you will look at a little parallelogram that is an elementary piece of that mesh and figure out what is its area and normal vector.
Design wire meshgrid is don't have to consider the tolerance of the whole structure of the grid, local damage will not affect the strength of the whole.