7 replies to this topic

[ngc0202]

I am making a game, and I used the D&D function called Step Toward Point avoiding solid objects. The problem is, when a solid object is between its goal and itself, it doesn't avoid the solid object, it goes toward the goal until it collides with the solid object and moves around it. Is there any way to make it so it actually AVOIDS the solid object.

[@Alex@]

I'm not sure about D&D having not used it in years. But you should look into the mp_potential_step function in the manual. It can be used to do actually what you want.

[ngc0202]

I'm not sure about D&D having not used it in years. But you should look into the mp_potential_step function in the manual. It can be used to do actually what you want.

That is the GML equivelent of the function I used...so it doesnt work.

[@Alex@]

It works for countless people including myself therefore the only conclusion is that you are using it wrong. It is possible these solids are not solid. Have you ticked the solid box in the object edittor.

[ngc0202]

How would I put:

perform a step towards position (NPC.x,NPC.y) with speed 5.1 avoiding solid only

into GML?

PS. The walls are definately solid.

[@Alex@]

mp_potential_step(x,y,stepsize,checkall) // This is the function in its basic form

mp_potential_step(NPC.x,NPC.y,5.1,false)//This is the function with the arguments you need.Change false to true if you want to avoid non-solids as well.

[ngc0202]

mp_potential_step(x,y,stepsize,checkall) // This is the function in its basic form

mp_potential_step(NPC.x,NPC.y,5.1,false)//This is the function with the arguments you need.Change false to true if you want to avoid non-solids as well.

I inserted that code replacing the D&D and it did the same exact thing, it wasn't avoiding it, it was going towards its target until it hit a solid, then it went along the solid, always touching it until it could get around. But that is far from AVOIDING solids.

[thados]

as far as i know this behavior is as good as its going to get with game maker unless you program a more sophisticated AI. The function you are using is very simple and takes a step toward the point given without looking for a fastest possible route.