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1	Game Development / Newbie & Debugging Questions / Re: Delayed rotation	on: 2012-09-28 06:49:32
Yeh, I noticed that little bug . Gonna try and fix it by myself . Thank you very much again

Game Development / Newbie & Debugging Questions / Re: Delayed rotation

on: 2012-09-27 23:04:25

Quote from: RobinB on 2012-09-27 22:34:44

Haha

Well you have this.angle.
You could make another variable this.currentangle

then use something like this:

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float diff = this.angle - this.currentangle;
if(diff < 0){ diff += (float)Math.PI * 2; }

if(diff < Math.PI){
    this.currentangle += 0.01f;
}else{
    this.currentangle -= 0.01f;
}

You check the diffrence between the current and the destination angle.
If its close to the right, move right, else move left.

I always mess up + and - so you might need to switch the variables

Thanks dude! That works veeery nicely!

Game Development / Newbie & Debugging Questions / Re: Delayed rotation

on: 2012-09-27 22:56:41

Quote from: RobinB on 2012-09-27 22:34:44

Haha

Well you have this.angle.
You could make another variable this.currentangle

then use something like this:

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float diff = this.angle - this.currentangle;
if(diff < 0){ diff += (float)Math.PI * 2; }

if(diff < Math.PI){
    this.currentangle += 0.01f;
}else{
    this.currentangle -= 0.01f;
}

You check the diffrence between the current and the destination angle.
If its close to the right, move right, else move left.

I always mess up + and - so you might need to switch the variables

Heh okay thx. That's seems easier

4	Game Development / Newbie & Debugging Questions / Re: Delayed rotation	on: 2012-09-27 20:15:24
Ugh, dunno how to implement this....

5	Game Development / Newbie & Debugging Questions / Re: Delayed rotation	on: 2012-09-27 18:20:06
Well thanks , I will take a look at it

Game Development / Newbie & Debugging Questions / Delayed rotation

on: 2012-09-27 18:06:48

Hi there all

This is my first post and don't care about my spelling, English is not my native
language

.

So I'm creating just a little tank game, everything is fine, tank is moving and cannon turning.

The problem is

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public void setDirection(float x, float y) { // parametres are mouse x,y
      
   float rx = x - this.getX();
   float ry = y - this.getY();
   this.angle = (float)Math.atan2(ry, rx); // cannon angle
}

This rotates the cannon okay, but, I would like to have some kind of delay to that turning (I mean, now
it's instant.
How is such a thing even possible? Somehow with delta time? I suck at math and physics sooo.

Well, if someone could help, I would really appreciate that!

Thanks in advance

edit. I try to explain better...

The cannon is now facing direction x,y
When I move the mouse, the facing direction changes of course to nx,ny.
I want it to be so that cannon slowly rotates to the new facing direction...

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