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  Rotation to the mouse cursor  (Read 750 times)
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Offline Mac70
« Posted 2013-07-08 14:15:25 »

Like in topic. I have entity sticked to camera (always in the centre of the screen) and I want to make rotate to the mouse cursor rotation. My code works, but it can't get past the 0 angle line. Is there any way to fix it? All angles have values between 0 and PI*2.

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        float deltaY = mouse.y - Display.getHeight()/2;
        float deltaX = mouse.x - Display.getWidth()/2;
        double desiredAngle = Math.atan2(deltaY, deltaX);
        desiredAngle+= (desiredAngle<0) ? Math.PI*2 : 0;
        desiredAngle-= (desiredAngle>Math.PI*2) ? Math.PI*2 : 0;
       
        if (desiredAngle>angle-Math.PI/64 && desiredAngle<angle+Math.PI/64) {}
        else if (desiredAngle>angle && desiredAngle<angle+Math.PI) {
            angle+= turnThrust/mass;
        }
        else if (desiredAngle<angle && desiredAngle>angle-Math.PI) {
            angle-= turnThrust/mass;
        }
Offline jonjava
« Reply #1 - Posted 2013-07-08 15:34:55 »

This thread should help: http://www.java-gaming.org/topics/character-in-center-of-screen-turns-toward-mouse/27052/msg/240754/view.html#msg240754

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