How to keep HUD in same place when camera rotates

firedream79

I am working on a running platform game and I would like to add some rotating scene and I have some problem: I would like to apply a score and buttons controls, but when rotate the camera I can't maintain the initial position.
I fixed the angle using: self.rotation = -camera.rotation but it can't help me to maintain the initial position.
I tried to use:
self.position.x = game.sceneX-magnitude( self.offsetX , self.offsetY )*sin(( self.Rotation )-atan( self.offsetX / self.offsetY ))
self.position.y = game.sceneY+magnitude( self.offsetX , self.offsetY )*cos(( self.Rotation )-atan( self.offsetX / self.offsetY ))
but It doesn't solve the problem.

Could somebody help me?

CodeMonster

this might be wrong but maybe try constraining your HUD buttons to a certain x and y position? maybe.
im not sure sorry but maybe you could try this, no harm in giving it a go

firedream79

camera.rotate rotates all the elements on the screen using its center as pivot, so if you use a centered image you solve the problem, but you can't if you use another at the top-left of the screen.

firedream79

I noticed that many other users had the same problems but I didn't find any solution.

firedream79

any solutions?

CodeMonster

im not sure how you can do this but you can somehow work out which way the screen has rotated and just constrain the x and y co-ordinates to be the bottom of the screen depending on which way the screen rotates, heres an example

in your HUD button it is constrained y 100 and lets say the screen rotates 100 degrees to the right then you constrain it to y 200. you can probably do this after using attributes and more, but i never use screen rotate so its hard for me, maybe @Socks knows?

jonmulcahy

If you track its orientation it should be easy to update the HUD based on the current orientation.

firedream79

I solved for orientation using -camera.rotation, my problem is that the actor moves on screen...

firedream79

I interpolated camera.rotate from 0 to 10 in 1s.
I constrained my actor defining start (x,y) and end position.
The problem is that even if I have been very carefull I can't avoid micromovements...
For this reason I am looking for some better solution...

firedream79

I hope that somebody solved the problem and can help me...is there some solutions to make some layers uninfluenced by camera effects?

CodeMonster

i wish i could help, but sorry i dont know the answer...

rdlew2008

I am not sure if this is what you need but....

this will keep it from a certain distance away from your main character (the 235)

at a certain angle (the 142)
i use 142 to keep HUD in upper left corner and 33 for upper left corner

both have to be the same numbers


this needs to be on a scrolable scene.

constrain attribute
-consttrain: self.rotation to scene.camera.rotation

constrain attribute
-constrain : self.position.x to (scene.hero.hero.position.x)+235*cos(scene.camera.rotation)+142


constrain attribute
-constrain : self.position.y to (scene.hero.hero.position.y)+235*cos(scene.camera.rotation)+142

firedream79

nothing...I am trying to try with your advice, I put to actors in the scene:
ACTOR 1 and ACTOR 2 (235,235).
I rotate camera wtih an angle 235, but ACTOR 2 doesn't keep the start position...

actor2.x = scene.Background.Actor 1.Position.X +235*cos( scene.Camera.Rotation )+142
actor2.y = scene.Background.Actor 1.Position.Y +235*cos( scene.Camera.Rotation )+142

maybe I am doing some mistakes?

I am trying to keep fixed the score in the upper left corner when the camera rotate +10, but it seems impossible on GS.
Could somebody help me?

UtopianGames

Would it be possible to use a background image with the HUD controls on it and constrain its rotation to - scene.camera.rotation like in our template below.



http://www.deepblueapps.com/helicopter-hud-template/

Another way would be like you mentioned using cos and sin like our rolling bones (playable link below).

Quick piece of advice if your having a pause button in the top right for e.g. and your going the cos sin route you will need a fake pause button (alpha 0 or graphics off) on a layer with scrollable unchecked for it to register a touch.



http://www.deepblueapps.com/rolling-bones/

Darren.

firedream79

for now I am adjusting manually the positions of x,y of ACTOR2 after the camera rotation of 10 degrees, it gives me bad micromovements, but I suppose that it isn't normal all this. I don't understand why GS don't give the possibility to introduce LAYER external to camera rotation, zooming and so on.
I

RubiWorks

I have the same problem dear @firedream79 GS Team would be a better formule to correct this. An behaviors because is very boring trying with cos and sin if you want to sync a button in a game that rotate the camera.