Moving Units with X and Y {and PolarProjection()}

Freyleyes · Nov 5, 2009

How do you move a unit in a certain direction using SetUnitX and SetUnitY.

I usually do this

JASS:

local unit u
local location p = PolarProjection(point, distance, angle)
local real x = GetLocationX(p)
local real y = GetLocationY(p)

call SetUnitX(u, x)
call SetUnitY(u, y)

There must be an easier way to move a unit in a certain angle, without having to declare another location?

Thanks in advance

YourNameHere · Nov 5, 2009

JASS:

local unit u
local real x = GetUnitX(u)
local real y = GetUnitY(u)
set x = x+DISTANCE*Cos(DIRECTION IN RADIANS)
set y = y+DISTANCE*Sin(DIRECTION IN RADIANS)

call SetUnitX(u, x)
call SetUnitY(u, y)

Saia_Djinn · Nov 5, 2009

JASS:

local unit u = GetTriggerUnit()

local real x = GetUnitX(u) + distance * Cos(angle)
local real y = GetUnitY(u) + distance * Sin(angle)
 
call SetUnitX(u, x)
call SetUnitY(u, y)

angle should be in radians not degrees

to convert just use * bj_DEGTORAD and vice versa

E: a bit 2 slow but my solution is 2 lines smaller

Freyleyes · Nov 5, 2009

Thanks for the help.

Yixx · Nov 5, 2009

inline Biatch!

JASS:

SetUnitPosition(GetTriggerUnit(),GetUnitX(GetTriggerUnit())+distance*Cos(angle),GetUnitY(GetTriggerUnit())+distance*Sin(angle)

Or if you dont want to interrupt animations use this:

JASS:

SetUnitX(GetTriggerUnit(),GetUnitX(GetTriggerUnit())+distance*Cos(angle))
SetUnitY(GetTriggerUnit(),GetUnitX(GetTriggerUnit())+distance*Sin(angle))

but the difference really is minor..

Saia_Djinn · Nov 5, 2009

But your function will be slightly slower =) coz of the 2 TriggerUnit() calls

JASS:

but the difference really is minor..

Yixx · Nov 5, 2009

that local unit has his effect only if more than 3 calls approx. are made, because the declaration and the nulling also take time.. I think with 3 calls it has almost no difference..

TriggerHappy · Nov 5, 2009

Yixx said:
inline Biatch!

JASS:

SetUnitPosition(GetTriggerUnit(),GetUnitX(GetTriggerUnit())+distance*Cos(angle),GetUnitY(GetTriggerUnit())+distance*Sin(angle)

Or if you dont want to interrupt animations use this:

JASS:

SetUnitX(GetTriggerUnit(),GetUnitX(GetTriggerUnit())+distance*Cos(angle)) SetUnitY(GetTriggerUnit(),GetUnitX(GetTriggerUnit())+distance*Sin(angle))

but the difference really is minor..

SetUnitX/Y moves the unit while ignoring pathing, so your unit could end up somewhere and get stuck. So if your using SetUnitX/Y makes sure to use some kind of bounds check (so the unit doesn't go outside of map) and pathing check.

SetUnitPosition checks pathing.

Yixx · Nov 5, 2009

It does, and you are absolutely right, but SetUnitPosition interupts animation, which might be a problem..

Ciebron · Nov 5, 2009

Yixx said:
SetUnitPosition interupts animation, which might be a problem..

not just animation, orders aswell

Freyleyes · Nov 6, 2009

Orders and animation isn't a problem, its just for a little projectile system I am creating for a FPS map.

Element of Water · Nov 7, 2009

What's the point in creating a projectile system when there are already plenty around?

Freyleyes · Nov 7, 2009

I prefer to code things myself, but mainly because I need allot of extra functions for the system for the different projectiles and missiles

Element of Water · Nov 7, 2009

https://www.hiveworkshop.com/forums/spells-569/missile-system-v1-11-assorted-spells-138003/

Mine allows you to use use structs to define onLoop and onHit methods, so you can do whatever you want to the missile every 0.035 seconds and when it hits its target.

Freyleyes · Nov 7, 2009

Its a very cool system you have there, I already did my missile system, but I think I might use that system cuz it has a homing function.

Nice work on that system

Element of Water · Nov 8, 2009

Thanks

Moving Units with X and Y {and PolarProjection()}

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