iOS Accelerometer Issue controlling character.

matarua

I have an issue with my game, the actor controlled by accelerometer with this code constrain attribute > self.Position.X self.Position.X +(15* game.Accelerometer.Y ) which works great... but the problem is when the character collides with a vertical object, it just sticks, as the constrain attribute overrides the bounce behaviour.

Is there a way to bounce off the vertical object considering the accelerometer value can be quite high. The best example I can think of is something like a wooden labyrinth set-up.

Currently I am sticking to things like Super Meat Boy and I don't want that.

Pinball style is what I am after, the harder you hit the more you bounce back.

Any help would be much appreciated

matarua

I have been using all the motion attributes to try and solve this and I am getting close using a combination of change attribute on actors X and interpolate actors X -## over a short time. It does not feel like a normal bounce, but it solves a lot of issues.

Is there a way to track an actors velocity and then use that as a variable to make a bounce bigger based on the actors speed? That is an idea I will look in to...

It's kind of like bouncing a basketball on Jupiter due to the accelerometer. We want to play normal basketball in a heavy gravity environment.

Up and down bouncing is fine, it's just left and right that gets overpowered by the accelerometer.

matarua

Best result is semi-rapid head banging. Head bang too much and you get a headache and then you die, that's the answer. That I could work out

RThurman

Try something like this.

Set up the walls with physics like this:
Density = 100
Friction = 0
Bounciness = 0
Fixed Rotation = checked
Collision Shape = rectangle


Then in the ball actor set up the physics like this:
Density = 1
Friction = 0
Bounciness = 0
Fixed Rotation = unchecked
Collision Shape = circle

Then in the ball actor use the following behaviors:

Collide
-- Bounce when colliding with: actor of type: wall

Timer -- every .2 seconds
--Accelerate:
----Direction: (vectorToAngle( game.Accelerometer.X , game.Accelerometer.Y )+90)%360
----Relative To: Scene
----Acceleration: 300

matarua

@RThurman thanks for that, it's not quite yet doing what I want I will have a play with it however and see if I can use that much appreciated!

RThurman

@matarua -- You are welcome. Once you get it working you can tweak the numbers to get it to respond how you want.

Oh -- I see an error. The ball needs a bounciness of .95 or higher.

The +90 is for landscape left rotation. If the game is in portrait mode remove the +90.

To get it to be more responsive/quicker/better make the timer smaller. (.1 is twice as fast as .2 etc.)

The slower the acceleration, the more precise the game will feel.

Hope that helps!

matarua

Thanks again, yes I had a play with the settings and will do some more experiments when I don't have to do so much work, phew, it's busy times! Tonight hopefully

matarua

Oh and a comment on the +90 could that be replaced by the in Gamesalad game.Screen.Device Orientation attribute?

cbt

I think if you change your constrain on the ball to "constrain every 0.1 seconds" your problem will be solved. If it is not smooth try every 0.01 seconds.