Check if point is passable

[Invisible Pink Unicorn]

So essentially ive been trying to make a dash skill that stopped when the unit collides with a Wall/Building/DDooa (unpassable terrain in general) .
I know how to do the dash itself and i know how to make the unit stop upon reaching the destinuppon as well as stop uppon hitting a unit. Its the part of stopping uppon contact with terraon that im just not sure how to do.
Ive had an idea of how to do it but i dont know if Warcraft 3 has the required commands.

Is there a way for the game to check whether a point is inside a passable or impassable zone?
I know i could in theory make a region around each dooad and building and check if the point is inside any of those regions but that would take quite a lot of both work as well as time.
So is it possible to check whether a space is occupied and if so is it doable with GUI or with JASS?

Thx to anyone who answers

 

[Jampion]

You can check, if the terrain is pathable, however this only affects terrain and ignores doodads, buildings and units.
The most common way is to use path checkers: Place a unit or item at the point you want to check. You can then immediatly compare its position to where you placed it. If it is at the same position the point is pathable, if not the unit/item was moved, because there was no space on the original position.
You can use an item if you want to ignore units and only check for the pathing map.
A unit lets you also check, if there is a ground unit blocking the point.

 

[Invisible Pink Unicorn]

You can check, if the terrain is pathable, however this only affects terrain and ignores doodads, buildings and units.
The most common way is to use path checkers: Place a unit or item at the point you want to check. You can then immediatly compare its position to where you placed it. If it is at the same position the point is pathable, if not the unit/item was moved, because there was no space on the original position.
You can use an item if you want to ignore units and only check for the pathing map.
A unit lets you also check, if there is a ground unit blocking the point.

Thanks a lot i just tried it and using units that way solved quite a couple of my others problems as well

 

[Wareditor]

Check this out : Bresenham Pathchecker

 

[Wark]

I remember there's a GUI condition to check if a point is walkable.
It basically checks the pathing at the location.
I use this in a few jump/knockback systems. Let me see if I can find it.

 

[Daffa]

You can also use Knockback System to simplify this issue.