More problems with my upcoming game.. Head is flying away.. (video included)

OskarDeveloper

So I am working on a racing game or something and at first i tried having the car in one actor but i looked really bad when landing upside down, because of the collision shape. So i figured that i could make them to two actors, one the head and the other a "body" actor.. I constrained the heads X and Y to the bodys X and Y but with like +10 pixels or something and it looked pretty neat, i also constrained the rotation so that they have the same rotation.. But still i am doing something wrong.. Please help me solve this..

LumpApps

Project received and returned

LumpApps

Sorry for the typos.

The_Gamesalad_Guru

Post a picture of your rules in the head.

OskarDeveloper

Sure! @FryingBaconStudios

OskarDeveloper

@FryingBaconStudios

LumpApps

Hi there, you have used a constrain to the cars position X and Y. So what is happening now is correct. What you want to do is use a sin and cos to have the head rotate with the car.
The constrains should be:
For X: car position + (radius*cos(rotationCar))
For Y: car position + (radius*sin(rotationCar))
Where radius is the radius from the cars center ( positionX and Y) to the positions of the heads center (positionX and Y)

It could be that I have the sin and cos the wrong way round. Because I am not at my Mac now and doing it out of my head.

Another thing is you do not need game attributes for the x and h of the car. When you open the head that is in the scene and unlock it ( click the big lock) you get acces the cars attributes.

Let me know if it works. I can look it up later if it's wrong.
Also do a search for mosinus on the forum. I made a tool that helps.

OskarDeveloper

thanks alot @LudwigHeijden ! I think i know how to make it but when i try it my head just keeps exploding… Is there any way you would have the time to make a template or something for me?

The_Gamesalad_Guru

Also uncheck moveable and don't us collision on the head. Just let the head be linked to the car. When you constrain a position you don't need it to be moveable. I have feeling it's going wrong during collisions.

OskarDeveloper

I cant get it to work...

LumpApps

Why not?
carpositionX+(radius*cos(CarAngle+90))
carpositionY +(radius*sin(CarAngle+90))
Should be right, I just checked. the +90 is beacues the head should be on top of the car, not on the front
Did you have the cars position (x and Y) and its angle (rotation) constrained to game.attributes? Also constrain the heads self.rotation to the cars rotation.
Experiment a bit with this, you'll get it I am sure.

OskarDeveloper

hum...

LumpApps

Radius should be the distance from the center in the car to the center on the head. So if your head imhas an x offset of 32 and a y offset of 16 you put this in the appropriate constrain.
Didymium are pretty smart because I see you put the constrain in the car and not in the head. I never thought of that.
If you want me to look at your project mail me at info at lumpapps.com but you will have to wait for tommorow because I am done working for today