/// <summary>
/// Checks for a collision between a bounding circle and an axis-aligned bounding box.
/// </summary>
/// <param name="circle">Bounding circle.</param>
/// <param name="box">Axis-aligned bounding box.</param>
/// <returns>True if a collision was found.</returns>
public static bool CollisionCircleAABox(BoundingCircle circle, BoundingBoxAA box)
{
// Find the point within the box that is closest to the circle center
Vector2 closestPoint = box.Min + (circle.Center - box.Min);
closestPoint.X = MathHelper.Clamp(closestPoint.X, box.Min.X, box.Max.X);
closestPoint.Y = MathHelper.Clamp(closestPoint.Y, box.Min.Y, box.Max.Y);
// Check if the point closest to the circle center is within the circle
return((closestPoint - circle.Center).Length() < circle.Radius);
}
/// <summary>
/// Checks for a collisions between two axis-aligned bounding boxes.
/// </summary>
/// <param name="box1">First bounding box.</param>
/// <param name="box2">Second bounding box.</param>
/// <returns>True if a collision was found.</returns>
public static bool CollisionAABoxAABox(BoundingBoxAA box1, BoundingBoxAA box2)
{
// Seperating Axis Theorem is used for determining collisions
if (box1.Max.X < box2.Min.X || box1.Min.X > box2.Max.X)
{
return(false);
}
if (box1.Max.Y < box2.Min.Y || box1.Min.Y > box2.Max.Y)
{
return(false);
}
return(true);
}
