/// <summary>
/// Determines if the current BoundingRectangle is intersecting the provided BoundingRectangle.
/// </summary>
/// <param name="obj">BoundingRectangle to check intersection with.</param>
/// <returns>Whether the BoundingRectangle intersects the BoundingRectangle.</returns>
public override bool Intersects(BoundingRectangle obj)
{
if (Rotation == 0 && obj.Rotation == 0)
{
Vector2d myTopLeft = TopLeft,
myBotRight = BotRight,
theirTopLeft = obj.TopLeft,
theirBotRight = obj.BotRight;
return(theirTopLeft.X <= myBotRight.X && theirBotRight.X >= myTopLeft.X && theirTopLeft.Y <= myBotRight.Y && theirBotRight.Y >= myTopLeft.Y);
}
else if (obj.Position.Distance(Position).Magnitude() <= obj.Size.Radius + Size.Radius) // Check if we're somewhat close to the object that we might be colliding with
{
var axisList = new Vector2d[] { TopRight - TopLeft, TopRight - BotRight, obj.TopLeft - obj.BotLeft, obj.TopLeft - obj.TopRight };
var myCorners = Corners();
var theirCorners = obj.Corners();
foreach (var axi in axisList)
{
var myProjections = Vector2dHelpers.GetMinMaxProjections(axi, myCorners);
var theirProjections = Vector2dHelpers.GetMinMaxProjections(axi, theirCorners);
// No collision
if (theirProjections.Max < myProjections.Min || myProjections.Max < theirProjections.Min)
{
return(false);
}
}
return(true);
}
return(false);
}
/// <summary>
/// Determines if the current BoundingRectangle contains the provided BoundingRectangle.
/// </summary>
/// <param name="rectangle">A rectangle to check containment on.</param>
/// <returns>Whether the BoundingRectangle contains the rectangle.</returns>
public override bool Contains(BoundingRectangle rectangle)
{
var corners = rectangle.Corners();
for (var i = 0; i < corners.Length; i++)
{
if (!this.Contains(corners[i]))
{
return(false);
}
}
return(true);
}
public void RotatedRectangleContainsPointWorks()
{
var rect = new BoundingRectangle(new Vector2d(2.5, 2.5), new Size2d(4.24, 2.83))
{
Rotation = Math.PI / 4
};
Assert.True(rect.Contains(rect.Position));
foreach (var vertex in rect.Corners())
{
Assert.True(rect.Contains(vertex));
}
Assert.False(rect.Contains(new Vector2d(-1, 0)));
Assert.False(rect.Contains(rect.TopRight + 1));
Assert.False(rect.Contains(rect.BotRight + 1));
Assert.False(rect.Contains(rect.TopLeft - 1));
Assert.False(rect.Contains(rect.BotLeft - 1));
Assert.True(rect.Contains(rect.TopRight - 1));
Assert.True(rect.Contains(rect.BotRight - 1));
Assert.True(rect.Contains(rect.TopLeft + 1));
Assert.True(rect.Contains(rect.BotLeft + 1));
}
public void UnrotatedRectangleContainsPointWorks()
{
var rect = new BoundingRectangle(new Vector2d(3, 2), new Size2d(6, 4));
Assert.True(rect.Contains(rect.Position));
foreach (var vertex in rect.Corners())
{
Assert.True(rect.Contains(vertex));
}
Assert.False(rect.Contains(new Vector2d(-1, 0)));
Assert.False(rect.Contains(rect.TopRight + 1));
Assert.False(rect.Contains(rect.BotRight + 1));
Assert.False(rect.Contains(rect.TopLeft - 1));
Assert.False(rect.Contains(rect.BotLeft - 1));
}
/// <summary>
/// Determines if the current BoundingRectangle contains the provided BoundingRectangle.
/// </summary>
/// <param name="rectangle">A rectangle to check containment on.</param>
/// <returns>Whether the BoundingRectangle contains the rectangle.</returns>
public override bool Contains(BoundingRectangle rectangle)
{
var corners = rectangle.Corners();
for (var i = 0; i < corners.Length; i++)
{
if (!this.Contains(corners[i]))
{
return false;
}
}
return true;
}
/// <summary>
/// Determines if the current BoundingRectangle is intersecting the provided BoundingRectangle.
/// </summary>
/// <param name="obj">BoundingRectangle to check intersection with.</param>
/// <returns>Whether the BoundingRectangle intersects the BoundingRectangle.</returns>
public override bool Intersects(BoundingRectangle obj)
{
if (Rotation == 0 && obj.Rotation == 0)
{
Vector2d myTopLeft = TopLeft,
myBotRight = BotRight,
theirTopLeft = obj.TopLeft,
theirBotRight = obj.BotRight;
return theirTopLeft.X <= myBotRight.X && theirBotRight.X >= myTopLeft.X && theirTopLeft.Y <= myBotRight.Y && theirBotRight.Y >= myTopLeft.Y;
}
else if (obj.Position.Distance(Position).Magnitude() <= obj.Size.Radius + Size.Radius) // Check if we're somewhat close to the object that we might be colliding with
{
var axisList = new Vector2d[] { TopRight - TopLeft, TopRight - BotRight, obj.TopLeft - obj.BotLeft, obj.TopLeft - obj.TopRight };
var myCorners = Corners();
var theirCorners = obj.Corners();
foreach (var axi in axisList)
{
var myProjections = Vector2dHelpers.GetMinMaxProjections(axi, myCorners);
var theirProjections = Vector2dHelpers.GetMinMaxProjections(axi, theirCorners);
// No collision
if (theirProjections.Max < myProjections.Min || myProjections.Max < theirProjections.Min)
{
return false;
}
}
return true;
}
return false;
}
