Android Can't get two virtual joysticks to move independently and at the same time

Posted by Cole on Game Development See other posts from Game Development or by Cole
Published on 2013-10-20T08:11:17Z Indexed on 2013/10/20 10:19 UTC
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   @Override
    public boolean onTouch(View v, MotionEvent event) {
        // TODO Auto-generated method stub

        float r = 70;
        float centerLx = (float) (screenWidth*.3425);
        float centerLy = (float) (screenHeight*.4958);
        float centerRx = (float) (screenWidth*.6538);
        float centerRy = (float) (screenHeight*.4917);
        float dx = 0;
        float dy = 0;
        float theta;
        float c;

        int action = event.getAction(); 
        int actionCode = action & MotionEvent.ACTION_MASK; 
        int pid = (action & MotionEvent.ACTION_POINTER_INDEX_MASK) >> MotionEvent.ACTION_POINTER_INDEX_SHIFT;
        int fingerid = event.getPointerId(pid);
        int x = (int) event.getX(pid);
        int y = (int) event.getY(pid);




            c = FloatMath.sqrt(dx*dx + dy*dy);
            theta = (float) Math.atan(Math.abs(dy/dx));


            switch (actionCode) {
            case MotionEvent.ACTION_DOWN:
            case MotionEvent.ACTION_POINTER_DOWN:

                //if touching down on left stick, set leftstick ID to this fingerid.                                                             
                if(x < screenWidth/2 && c<r*.8) {
                    lsId = fingerid;
                                    dx = x-centerLx;
                        dy = y-centerLy;
                    touchingLs = true;
                }
                else if(x > screenWidth/2 && c<r*.8) {
                    rsId = fingerid;
                                    dx = x-centerRx;
                                    dy = y-centerRy;
                    touchingRs = true;
                }



                    break;
            case MotionEvent.ACTION_MOVE:


            if (touchingLs && fingerid == lsId) { 
                dx = x - centerLx;
                dy = y - centerLy;
            }else if (touchingRs && fingerid == rsId) { 
                dx = x - centerRx;
                dy = y - centerRy;
            }


                c = FloatMath.sqrt(dx*dx + dy*dy);
                theta = (float) Math.atan(Math.abs(dy/dx));


                //if touching outside left radius and moving left stick
                if(c >= r && touchingLs && fingerid == lsId) {
                    if(dx>0 && dy<0) { //top right quadrant
                        lsX = r * FloatMath.cos(theta);
                        lsY = -(r * FloatMath.sin(theta));
                        Log.i("message", "top right");
                    }

                    if(dx<0 && dy<0) { //top left quadrant
                        lsX = -(r * FloatMath.cos(theta));
                        lsY = -(r * FloatMath.sin(theta));
                        Log.i("message", "top left");
                    }

                    if(dx<0 && dy>0) { //bottom left quadrant
                        lsX = -(r * FloatMath.cos(theta));
                        lsY = r * FloatMath.sin(theta);
                        Log.i("message", "bottom left");
                    }


                    else if(dx > 0 && dy > 0){ //bottom right quadrant
                        lsX = r * FloatMath.cos(theta);
                        lsY = r * FloatMath.sin(theta);
                        Log.i("message", "bottom right");
                    }


                }
                if(c >= r && touchingRs && fingerid == rsId) {
                    if(dx>0 && dy<0) { //top right quadrant
                        rsX = r * FloatMath.cos(theta);
                        rsY = -(r * FloatMath.sin(theta));
                        Log.i("message", "top right");
                    }
                    if(dx<0 && dy<0) { //top left quadrant
                        rsX = -(r * FloatMath.cos(theta));
                        rsY = -(r * FloatMath.sin(theta));
                        Log.i("message", "top left");
                    }
                    if(dx<0 && dy>0) { //bottom left quadrant
                        rsX = -(r * FloatMath.cos(theta));
                        rsY = r * FloatMath.sin(theta);
                        Log.i("message", "bottom left");
                    }
                    else if(dx > 0 && dy > 0) {
                        rsX = r * FloatMath.cos(theta);
                        rsY = r * FloatMath.sin(theta);
                        Log.i("message", "bottom right");
                    }
                }
                else {
                    if(c < r && touchingLs && fingerid == lsId) {
                        lsX = dx;
                        lsY = dy;
                    }
                    if(c < r && touchingRs && fingerid == rsId){
                        rsX = dx;
                        rsY = dy;
                    }

                } 

                break;
            case MotionEvent.ACTION_UP:
            case MotionEvent.ACTION_POINTER_UP:

            if (fingerid == lsId) { 
                lsId = -1;
                lsX = 0;
                lsY = 0;
                touchingLs = false;
            } else if (fingerid == rsId) { 
                rsId = -1;
                rsX = 0;
                rsY = 0;
                touchingRs = false;
            }


                break;
            }



        return true;
    }

There's a left joystick and a right joystick. Right now only one will move at a time. If someone could set me on the right track I would be incredibly grateful cause I've been having nightmares about this problem.

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