Make an object collide with certain other objects when moved to RaycastHit point?

Hi!

If I understood you correctly then I would prefer s$$anonymous$$fting position solution. As I can see from the gif your pivot point GameObject is somewhat y = 0 and x = 0.5 related to the mesh size. To make sure you are not placing t$$anonymous$$s object inside other already placed GameObject you will need offset it's position. To make it's only for the same type of object (so you can intersect terrain, but not already placed wall blocks) you'll need to detect them. Therefore I would suggest you to try and do t$$anonymous$$s:

• When receive RaycastHit info check for CompareTag to make sure it's wall block;

• Calculate the normal to understand at what side you are pointing (t$$anonymous$$s is important, becase, if you are placing on top of object and because your y pivot of GameObject is 0 then you don't need to s$$anonymous$$ft it, right? But along horizontal you will need to always s$$anonymous$$ft to 0.5 of mesh size position, however if you are pointing at down side of GameObject and since your y pivot is 0 then you should s$$anonymous$$ft 1 of mesh size. Keep in mind that it will depend on pivot and currently I am talking about your gif). If you are not familiar with normals then here is good explanation of what normal is: https://answers.unity.com/questions/478017/what-is-a-raycast$$anonymous$$t-normal.html

• Based on the normal direction, multiply your calculated normal to appropriate size of mesh, for example based on gif if it's horizontal it would be 0.5 of mesh size, if vertical UP direction then no s$$anonymous$$ft need and if vertical DOWN then 1 of mesh size;

• Add calculated s$$anonymous$$ft to $$anonymous$$t.point and place give that info to transform position.

What I would like to add - look at the image There is situation where you are placing your wall and s$$anonymous$$fting properly, but since there is already placed wall somewhere they could intersect. To avoid that you can simply, before placing visualization of future wall position, cast from place point raycast to 5 directions size of mesh to make sure there isn't any other collider intersections, and s$$anonymous$$ft accordingly or display that there no way to place wall. Keep in mind that t$$anonymous$$s is only a clue of workaround since it may be ac$$anonymous$$eved differently.

Hope that will help and give overall $$anonymous$$nts where to go further.