Latest posts of: AppleWilliam

Show Posts
Pages: [1]

on: 2010-08-04 21:50:47

maybe...

Math.sqrt(value)

or...

Math.pow(value, 1.0 / factor)

I tried that. something like this:

1
2
3
4

   public void theta1(double x, double y){
      y = Math.pow(y,1/2);
      x = Math.pow(x,1/2);
      setTheta(Math.atan2(y, x));

My Y and X are dependant on each other. Since they are in a ratio, theta will always be the same if x and y are being modified by the same factor

2	Java Game APIs & Engines / JInput / Decreasing the sensitivity	on: 2010-08-04 21:34:25
The xbox controller is extremlly sensitive. I was wondering how I should go about decreasing the sensitivity. I was thinking about dividing the poll data by 2. Would that work or is there an easier way.

3	Java Game APIs & Engines / JInput / Re: Converting xbox controller sticks to theta	on: 2010-08-04 18:48:22
Quote from: Riven on 2010-08-04 18:34:23 You are flipping the Y axis, so: `Math.atan2(-y, x);` Sorry my mistake. I originally did that but it didn't work. I realized it was an error in my code.

4	Java Game APIs & Engines / JInput / Re: Converting xbox controller sticks to theta	on: 2010-08-04 18:01:53
Quote from: teletubo on 2010-08-04 17:10:25 hum ... inverting your Y on calling Math.atan2 ? Like this? Math.atan2(1/y, x)

5	Java Game APIs & Engines / JInput / Re: Converting xbox controller sticks to theta	on: 2010-08-04 17:03:37
Quote from: teletubo on 2010-08-04 16:05:12 maybe because the screen Y axis grows in the oposite direction of a normal cartesian Y axis . (i.e. moving up in your screen means decreasing Y, while in a cartesian plan it means increasing , and that is probably how the controller returns the values. ) How could this be fixed?

6	Java Game APIs & Engines / JInput / Re: Converting xbox controller sticks to theta	on: 2010-08-04 15:58:17
Quote from: teletubo on 2010-08-04 15:39:05 Math.atan2 ( y, x ) returns the angle theta . beware of the order of the parameters, Y first, then X . Thank you. I feel like the y axis is inverted. When I move the stick up it paints my arrow down.

7	Java Game APIs & Engines / JInput / Converting xbox controller sticks to theta	on: 2010-08-04 15:35:45
Hi, The xbox controller has 2 analog sticks. They output values of x and y (rectangular). I want to convert these values to theta. How can I do this?

8	Java Game APIs & Engines / JInput / Listener or Timer	on: 2010-07-21 17:15:26
I am using a timer to refresh the polling data every 50 milliseconds. Is there anyway to use a listener instead?

Pages: [1]