Rotation to face an actor

TraXsiv2

Hello, In my game I have these stationary turrets that I want rotate to face the player actor at all times. I'm having trouble figuring this out. Thanks

quantumsheep

Keep a track of the player's X and Y coordinates by constraining player self.positionx to a variable called 'playerX' and player self.positiony to a variable called 'playerY'.

Then, on your turrets, put in the behaviour rotate to

and in the X and Y fields, hit the little 'e' button next to it and make the X field 'playerX' and the Y field 'playerY'.

Hope that makes sense,

QS

TraXsiv2

Do I use "rotate to position" for the turrets and if so what do i put in for the offset Angle.

Thanks for you help

TraXsiv2

Yeah, I am having trouble setting it up.

So far I have two GAME attributes which are playerX and playerY. they are set to 0 and both are integers
In my player's actor I have two "Constrain Attributes" self.Postion.X To PlayerX and self.Position.Y To PlayerY

As far as what goes into the turrets I am confused how to set everything up.

firemaplegames

I'm not sure about the rest, but you will need to switch those attributes...

game.playerX to: self.position.x
game.playerY to: self.position.y

ORBZ

Rotate to position: playerX, playerY

Offset angle: 0

Do the switch as FMG said.

TraXsiv2

I got it working guys. Thank you so much. I had to put a timer in on both the turret and the player so that it would constantly check the attributes.

ORBZ

@TraXsiv2

Your method is cpu intensive and won't work for large projects with lots of turrets. Timers eat cpu.

Trust us, you don't need a timer. You need to use constraints.

scitunes

a constraint constantly checks and changes whatever is being constrained. So if you are constraining the rotation of something to something else using VectorToAngle it is constantly checking the angle and then changing the rotation to that angle. Therefore constraints are also cpu intensive but should be a lot smoother looking than a timer system and probably less cpu intensive than a timer. Use both timers and constrains sparingly.

ORBZ

^^^ what he said