/** Check if the ball collides with any twinkles and convert into a score */
public void CheckBallCollisions(Ball b)
{
if (b != null) {
var qb = new nGQuad(5f).Offset(b.Position);
foreach (var t in Twinkles) {
var qc = new nGQuad(t.Size).Offset(t.Position);
if (qc.Intersects(qb)) {
t.Die();
CreateScore(t);
}
}
}
}
/** If another quad intersects, non-rotated */
public bool Intersects(nGQuad q)
{
var rectA = Rect;
var rectB = q.Rect;
// Logging for debug
// nLog.Debug("{0},{1} -> {2},{3} vs. {4},{5} -> {6},{7}", xMin, yMin, xMax, yMax, q.xMin, q.yMin, q.xMax, q.yMax);
// For rotated test, see:
// http://stackoverflow.com/questions/115426/algorithm-to-detect-intersection-of-two-rectangles
var rtn = ((Math.Abs(rectA.x - rectB.x) < (Math.Abs(rectA.width + rectB.width) / 2)) &&
(Math.Abs(rectA.y - rectB.y) < (Math.Abs(rectA.height + rectB.height) / 2)));
return rtn;
}
public nGQuad(nGQuad parent)
{
Init(parent.xMin, parent.yMin, parent.xMax, parent.yMax);
}
/** Check if two sprites intersect */
public static bool Intersects(nSprite a, nSprite b)
{
var q1 = new nGQuad();
q1.Points = a.Points.Raw;
q1.Offset(a.Position[0], a.Position[1]);
var q2 = new nGQuad();
q2.Points = b.Points.Raw;
q2.Offset(b.Position[0], b.Position[1]);
return q1.Intersects(q2);
}