[General] Custom Unit Line of Sight?

[Ether]

Hello! I wonder if there is a way to modify the in-game files or code system to make custom line of sight from polar radius (default) to a custom one like this:

SCENARIO:
* I wanted to make unit A to stealth move near unit B without B seeing and proceeding to auto attack.
* The triangular shape is supposed to be my desired line of sight or field of view of the facing of the unit(s) instead of circular area of view.
* I had old problems that units still engage on foes that comes within their range of sight even if their facing is not direct to the foe. (Prolem)

 

[Kakerate]

Good luck trying to do this with default API, you're going to need to use Memory library to pull something like that off

 

[Kaijyuu]

Not plausible. Line of sight is shared between all units of a player for one thing, and trying to limit sight through procedurally generated line of sight blockers (to make the cone vision) would be hellish to implement and would likely cause problems when two units get close to each other.

 

[-Manuel-]

You can play with dumny units that have a fixed circular vision, for example, a line of sight of 32, then create a formation of dummies that form a pseudo-triangle, in each unit that has this function and move it periodically to the current unit according to its angle.
You have to keep in mind that:
- Real units have no vision.
- Disable the attack of the units, to prevent auto acquiring targets.
Check periodically if any unit is visible (enter the unit's vision area) and then remove the ability to disable attack.
This is a vague idea, but I think it is possible.

 

[HappyTauren]

Someone made a system for this for one of the contests so it's definitely possible to do in wc3.

 

[Flux]

A workaround is you could also "hide" units when not within vision range/angle.
Example:
Mini-Mapping Contest #14 - Stealth

If it's a multiplayer map, you can't use the hide function (ShowUnit(unit whichUnit, boolean flag)) because it will cause a desync. Instead you just have to make them transparent, hide hp bar and shadow and remove their footprints.