public static bool Collide(RectangleCollisionShape s1, RectangleCollisionShape s2)
{
return s1.Shape.Intersects(s2.Shape);
}
public static bool Collide(RectangleCollisionShape s1, CircleCollisionShape s2)
{
float circleDistanceX = Math.Abs(s2.Center.X - s1.Shape.X);
float circleDistanceY = Math.Abs(s2.Center.Y - s1.Shape.Y);
if (circleDistanceX > (s1.Shape.Width / 2 + s2.Radius)) { return false; }
if (circleDistanceY > (s1.Shape.Height / 2 + s2.Radius)) { return false; }
if (circleDistanceX <= (s1.Shape.Width / 2)) { return true; }
if (circleDistanceY <= (s1.Shape.Height / 2)) { return true; }
double cornerDistance_sq = Math.Pow((circleDistanceX - s1.Shape.Width / 2), 2) +
Math.Pow((circleDistanceY - s1.Shape.Height / 2), 2);
return cornerDistance_sq < Math.Pow(s2.Radius, 2);
}
public static bool Collide(RectangleCollisionShape s1, CompoundCollisionShape s2)
{
foreach (ICollisionShape c2 in s2.Shapes)
{
if (Collide(s1, c2))
return true;
}
return false;
}