public void RotatedRectanglesCollideCorrectly()
{
var rect1 = new BoundingRectangle(new Vector2d(2.5, 2.5), new Size2d(4.24, 2.83))
{
Rotation = - Math.PI / 4
};
var rect2 = new BoundingRectangle(new Vector2d(9, 4), new Size2d(6, 4));
Assert.False(rect1.Intersects(rect2));
Assert.False(rect2.Intersects(rect1));
rect2.Position.X-=2;
Assert.True(rect1.Intersects(rect2));
Assert.True(rect2.Intersects(rect1));
rect2.Rotation = Math.PI / 2;
rect2.Position++;
Assert.False(rect1.Intersects(rect2));
Assert.False(rect2.Intersects(rect1));
rect2.Rotation = Math.PI;
rect2.Position--;
Assert.True(rect1.Intersects(rect2));
Assert.True(rect2.Intersects(rect1));
rect2.Position.Y+=10;
Assert.False(rect1.Intersects(rect2));
Assert.False(rect2.Intersects(rect1));
rect2.Position.Y -= 10;
rect1.Position.X += 5;
Assert.True(rect1.Intersects(rect2));
Assert.True(rect2.Intersects(rect1));
rect1.Position.X += 9;
Assert.False(rect1.Intersects(rect2));
Assert.False(rect2.Intersects(rect1));
rect1.Rotation = 0;
rect1.Position.X = 12;
rect2.Rotation = Math.PI;
Assert.True(rect1.Intersects(rect2));
Assert.True(rect2.Intersects(rect1));
}
public void UnrotatedRectangleCornersGetWorks()
{
var rect = new BoundingRectangle(new Vector2d(3, 3), new Size2d(6, 6));
Assert.True(rect.TopLeft.Equivalent(Vector2d.Zero));
Assert.True(rect.TopRight.Equivalent(new Vector2d(6, 0)));
Assert.True(rect.BotLeft.Equivalent(new Vector2d(0, 6)));
Assert.True(rect.BotRight.Equivalent(new Vector2d(6, 6)));
rect.Position -= 6;
Assert.True(rect.TopLeft.Equivalent(new Vector2d(-6, -6)));
Assert.True(rect.TopRight.Equivalent(new Vector2d(0, -6)));
Assert.True(rect.BotLeft.Equivalent(new Vector2d(-6, 0)));
Assert.True(rect.BotRight.Equivalent(Vector2d.Zero));
}
public void UnRotatedRectanglesCollideCorrectly()
{
var rect1 = new BoundingRectangle(new Vector2d(5, 3), new Size2d(10, 6));
var rect2 = new BoundingRectangle(new Vector2d(5, 3), new Size2d(3, 3));
Assert.True(rect1.Intersects(rect2));
Assert.True(rect2.Intersects(rect1));
rect2.Position += 3;
Assert.True(rect1.Intersects(rect2));
Assert.True(rect2.Intersects(rect1));
rect2.Position++;
Assert.True(rect1.Intersects(rect2));
Assert.True(rect2.Intersects(rect1));
rect2.Position++;
Assert.False(rect1.Intersects(rect2));
Assert.False(rect2.Intersects(rect1));
}
public void IsCollidingWithRectangleWorks()
{
var rect = new BoundingRectangle(Vector2d.Zero, new Size2d(10, 6))
{
Position = new Vector2d(5, 3)
};
var circle = new BoundingCircle(Vector2d.Zero, 3)
{
Position = new Vector2d(14, 3)
};
Assert.False(circle.Intersects(rect));
circle.Position.X--;
Assert.True(circle.Intersects(rect));
rect.Rotation = Math.PI * .5;
rect.Position.X = 3;
rect.Position.Y = 5;
circle.Position.X = 8;
circle.Position.Y = 12;
Assert.True(circle.Intersects(rect));
circle = new BoundingCircle(Vector2d.Zero, 50)
{
Position = new Vector2d(156, 165)
};
rect = new BoundingRectangle(Vector2d.Zero, new Size2d(200, 100))
{
Position = new Vector2d(300, 200)
};
Assert.True(circle.Intersects(rect));
circle.Position.X = 300;
circle.Position.Y = 350;
Assert.False(circle.Intersects(rect));
}
public void RotatedRectangleCornersGetWorks()
{
var rect = new BoundingRectangle(new Vector2d(3, 2), new Size2d(4, 2))
{
Rotation = -Math.PI / 2
};
var topLeft = rect.TopLeft.Clone();
var topRight = rect.TopRight.Clone();
var botLeft = rect.BotLeft.Clone();
var botRight = rect.BotRight.Clone();
topLeft.Apply(Math.Round);
topRight.Apply(Math.Round);
botLeft.Apply(Math.Round);
botRight.Apply(Math.Round);
Assert.True(topLeft.Equivalent(new Vector2d(2, 4)));
Assert.True(topRight.Equivalent(new Vector2d(2, 0)));
Assert.True(botLeft.Equivalent(new Vector2d(4, 4)));
Assert.True(botRight.Equivalent(new Vector2d(4, 0)));
}
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;
}
/// <summary> /// Determines if the current bounded object is intersecting the provided BoundingRectangle. /// </summary> /// <param name="rectangle">BoundingRectangle to check intersection with.</param> /// <returns>Whether the bounds intersects the BoundingRectangle.</returns> public abstract bool Intersects(BoundingRectangle rectangle);
/// <summary> /// Determines if the current bounded object completely contains the provided BoundingRectangle. /// </summary> /// <param name="rectangle">A rectangle to check containment on.</param> /// <returns>Whether the bounds contains the rectangle.</returns> public abstract bool Contains(BoundingRectangle rectangle);
/// <summary>
/// Determines if the current BoundingCircle is intersecting the provided BoundingRectangle.
/// </summary>
/// <param name="rectangle">BoundingRectangle to check intersection with.</param>
/// <returns>Whether the BoundingCircle intersects the rectangle.</returns>
public override bool Intersects(BoundingRectangle rectangle)
{
Vector2d translated = rectangle.Rotation == 0
? Position
: Position.RotateAround(rectangle.Position, -rectangle.Rotation);
var circleDistance = translated.Distance(rectangle.Position);
if (circleDistance.X > (rectangle.Size.HalfWidth + this.Radius)) { return false; }
if (circleDistance.Y > (rectangle.Size.HalfHeight + this.Radius)) { return false; }
if (circleDistance.X <= (rectangle.Size.HalfWidth)) { return true; }
if (circleDistance.Y <= (rectangle.Size.HalfHeight)) { return true; }
var cornerDistance_sq = Math.Pow(circleDistance.X - rectangle.Size.HalfWidth, 2) + Math.Pow(circleDistance.Y - rectangle.Size.HalfHeight, 2);
return (cornerDistance_sq <= (this.Radius * this.Radius));
}
