Original Post
I am trying to translate the code found here:
http://www.migapro.com/circle-and-rotated-rectangle-collision-detection/
The collision detection do not work as intended.
Here is my code:
public static boolean rotatedRectangleVsCircle(GameObject rect, GameObject circle)
{
double rectCx = rect.currX + rect.width / 2, //Rectangle center x
rectCy = rect.currY + rect.height / 2, //Rectangle center y
ccX = circle.currX + circle.width / 2, //Circle center x
ccY = circle.currY + circle.height/ 2, //Circle center y
rot = Math.toRadians(rect.rotation),
cx = Math.cos(rot) * (ccX - rectCx) - Math.sin(rot) * (ccY - rectCy) + rectCx,
cy = Math.sin(rot) * (ccX - rectCx) + Math.cos(rot) * (ccY - rectCy) + rectCy,
x,y;
if (cx < rect.currX)
x = rect.currX;
else if (cx > rect.currX + rect.width)
x = rect.currX + rect.width;
else
x = cx;
if (cy < rect.currY)
y = rect.currY;
else if (cy > rect.currY + rect.height)
y = rect.currY + rect.height;
else
y = cy;
if (findDistance(cx, cy, x, y) < circle.width / 2)
return true;
else
return false;
}
Point currX, currY represent the top-left corner of the sprite.
The sprite image looks like this at the start:
[attachment=14670:rectangle.png]
Finally, the rotation uses the start value 0 and increases with 1 every frame, rotating around its center point.
Why is it not working?
