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  [SOLVED]Rotation around a point  (Read 817 times)
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Offline DazKins
« Posted 2012-12-03 13:05:53 »

So i'm writing out a program to lock a camera to an entity or object in my game

The rotation works fine and seems to rotate correctly but the center about which it rotates is off.

I reckon i understand why it's not working i just don't know how to fix it

Here's the code

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public void lockCameraToEntity(Entity e,float x,float y,float z){
   float hyp = (float)Math.sqrt(x*x+z*z);
   this.pos.x=(float)(-(e.pos.x+x) + (Math.sin(Math.toRadians(e.rot.y))*hyp)+hyp);
   this.pos.y=-(e.pos.y+y);
   this.pos.z=(float)(-(e.pos.z+z) + (Math.cos(Math.toRadians(e.rot.y))*hyp)+hyp);
}

DazKins

Check out my Dev Blog: http://dazkins.tumblr.com
Offline Jimmt
« League of Dukes »

JGO Kernel


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« Reply #1 - Posted 2012-12-03 23:20:38 »


I reckon i understand why it's not working i just don't know how to fix it

Well then, why is it not working?
Offline DazKins
« Reply #2 - Posted 2012-12-04 07:45:10 »

Its ok i got it fixed now

The issue was that i was adding the hypotenuse to the offset of each axis when instead i should have been adding the x and z offset parsed to to function

DazKins

Check out my Dev Blog: http://dazkins.tumblr.com
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