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Added RectangleF.DistanceSquared and RectangleF.Distance

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Ell 2022-03-10 16:03:09 +01:00
parent 180f82d2c7
commit 96f0c51757
3 changed files with 117 additions and 73 deletions
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1
CHANGELOG.md
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@ -14,6 +14,7 @@ Additions
- Added ColorExtensions.Multiply
- Added SoundEffectInstanceHandler.Stop
- Added TextureRegion.OffsetCopy
- Added RectangleF.DistanceSquared and RectangleF.Distance
Improvements
- Generify GenericFont's string drawing

9
MLEM.Ui/UiControls.cs
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@ -373,12 +373,11 @@ namespace MLEM.Ui {
foreach (var child in children) {
if (!child.CanBeSelected || child == this.SelectedElement)
continue;
var distVec = child.Area.Center - this.SelectedElement.Area.Center;
if (Math.Abs(direction.Angle() - Math.Atan2(distVec.Y, distVec.X)) >= MathHelper.PiOver2 - Element.Epsilon)
var (xOffset, yOffset) = child.Area.Center - this.SelectedElement.Area.Center;
if (Math.Abs(direction.Angle() - Math.Atan2(yOffset, xOffset)) >= MathHelper.PiOver2 - Element.Epsilon)
continue;
var distSq = distVec.LengthSquared();
// prefer navigating to elements that have the same parent as the currently selected element
if (closest == null || distSq < closestDistSq || closest.Parent != this.SelectedElement.Parent && child.Parent == this.SelectedElement.Parent) {
var distSq = child.Area.DistanceSquared(this.SelectedElement.Area);
if (closest == null || distSq < closestDistSq) {
closest = child;
closestDistSq = distSq;
}

180
MLEM/Misc/RectangleF.cs
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@ -105,49 +105,6 @@ namespace MLEM.Misc {
this.Height = size.Y;
}
/// <summary>
/// Creates a new rectangle based on two corners that form a bounding box.
/// The resulting rectangle will encompass both corners as well as all of the space between them.
/// </summary>
/// <param name="corner1">The first corner to use</param>
/// <param name="corner2">The second corner to use</param>
/// <returns></returns>
public static RectangleF FromCorners(Vector2 corner1, Vector2 corner2) {
var minX = Math.Min(corner1.X, corner2.X);
var minY = Math.Min(corner1.Y, corner2.Y);
var maxX = Math.Max(corner1.X, corner2.X);
var maxY = Math.Max(corner1.Y, corner2.Y);
return new RectangleF(minX, minY, maxX - minX, maxY - minY);
}
/// <summary>
/// Converts a float-based rectangle to an int-based rectangle, flooring each value in the process.
/// </summary>
/// <param name="rect">The rectangle to convert</param>
/// <returns>The resulting rectangle</returns>
public static explicit operator Rectangle(RectangleF rect) {
return new Rectangle(rect.X.Floor(), rect.Y.Floor(), rect.Width.Floor(), rect.Height.Floor());
}
/// <summary>
/// Converts an int-based rectangle to a float-based rectangle.
/// </summary>
/// <param name="rect">The rectangle to convert</param>
/// <returns>The resulting rectangle</returns>
public static explicit operator RectangleF(Rectangle rect) {
return new RectangleF(rect.X, rect.Y, rect.Width, rect.Height);
}
/// <inheritdoc cref="Equals(RectangleF)"/>
public static bool operator ==(RectangleF a, RectangleF b) {
return a.X == b.X && a.Y == b.Y && a.Width == b.Width && a.Height == b.Height;
}
/// <inheritdoc cref="Equals(RectangleF)"/>
public static bool operator !=(RectangleF a, RectangleF b) {
return !(a == b);
}
/// <inheritdoc cref="Rectangle.Contains(float, float)"/>
public bool Contains(float x, float y) {
return this.X <= x && x < this.X + this.Width && this.Y <= y && y < this.Y + this.Height;
@ -196,6 +153,92 @@ namespace MLEM.Misc {
return value.Left < this.Right && this.Left < value.Right && value.Top < this.Bottom && this.Top < value.Bottom;
}
/// <inheritdoc cref="Rectangle.Offset(float, float)"/>
public void Offset(float offsetX, float offsetY) {
this.X += offsetX;
this.Y += offsetY;
}
/// <inheritdoc cref="Rectangle.Offset(Vector2)"/>
public void Offset(Vector2 amount) {
this.X += amount.X;
this.Y += amount.Y;
}
/// <summary>
/// Calculates the suqared distance between this rectangle and the <paramref name="value"/>.
/// The returned value is the smallest squared distance between any two edges or corners of the two rectangles.
/// </summary>
/// <param name="value">The rectangle to calculate the squared distance to.</param>
/// <returns>The squared distance between the two rectangles.</returns>
public float DistanceSquared(RectangleF value) {
// we calculate the distance based on the quadrants that the other rectangle is in using 8 cases:
// 1 7 4
// 3 T 6
// 2 8 5
var valueIsAbove = value.Bottom < this.Top;
var valueIsBelow = value.Top > this.Bottom;
if (value.Right < this.Left) {
if (valueIsAbove) // 1
return Vector2.DistanceSquared(new Vector2(value.Right, value.Bottom), new Vector2(this.Left, this.Top));
if (valueIsBelow) // 2
return Vector2.DistanceSquared(new Vector2(value.Right, value.Top), new Vector2(this.Left, this.Bottom));
return (this.Left - value.Right) * (this.Left - value.Right); // 3
} else if (value.Left > this.Right) {
if (valueIsAbove) // 4
return Vector2.DistanceSquared(new Vector2(value.Left, value.Bottom), new Vector2(this.Right, this.Top));
if (valueIsBelow) // 5
return Vector2.DistanceSquared(new Vector2(value.Left, value.Top), new Vector2(this.Right, this.Bottom));
return (value.Left - this.Right) * (value.Left - this.Right); // 6
} else if (valueIsAbove) {
return (this.Top - value.Bottom) * (this.Top - value.Bottom); // 7
} else if (valueIsBelow) {
return (value.Top - this.Bottom) * (value.Top - this.Bottom); // 8
} else {
return 0;
}
}
/// <summary>
/// Calculates the distance between this rectangle and the <paramref name="value"/>.
/// The returned value is the smallest distance between any two edges or corners of the two rectangles.
/// </summary>
/// <param name="value">The rectangle to calculate the distance to.</param>
/// <returns>The distance between the two rectangles.</returns>
public float Distance(RectangleF value) {
return (float) Math.Sqrt(this.DistanceSquared(value));
}
/// <summary>Returns a string that represents the current object.</summary>
/// <returns>A string that represents the current object.</returns>
public override string ToString() {
return "{X:" + this.X + " Y:" + this.Y + " Width:" + this.Width + " Height:" + this.Height + "}";
}
/// <inheritdoc cref="Rectangle.Deconstruct"/>
public void Deconstruct(out float x, out float y, out float width, out float height) {
x = this.X;
y = this.Y;
width = this.Width;
height = this.Height;
}
/// <summary>
/// Converts a float-based rectangle to an int-based rectangle, flooring each value in the process.
/// </summary>
/// <param name="rect">The rectangle to convert</param>
/// <returns>The resulting rectangle</returns>
public static explicit operator Rectangle(RectangleF rect) {
return new Rectangle(rect.X.Floor(), rect.Y.Floor(), rect.Width.Floor(), rect.Height.Floor());
}
/// <inheritdoc cref="Rectangle.Union(Rectangle, Rectangle)"/>
public static RectangleF Union(RectangleF value1, RectangleF value2) {
var x = Math.Min(value1.X, value2.X);
var y = Math.Min(value1.Y, value2.Y);
return new RectangleF(x, y, Math.Max(value1.Right, value2.Right) - x, Math.Max(value1.Bottom, value2.Bottom) - y);
}
/// <inheritdoc cref="Rectangle.Intersect(Rectangle, Rectangle)"/>
public static RectangleF Intersect(RectangleF value1, RectangleF value2) {
if (value1.Intersects(value2)) {
@ -209,37 +252,38 @@ namespace MLEM.Misc {
}
}
/// <inheritdoc cref="Rectangle.Offset(float, float)"/>
public void Offset(float offsetX, float offsetY) {
this.X += offsetX;
this.Y += offsetY;
/// <summary>
/// Creates a new rectangle based on two corners that form a bounding box.
/// The resulting rectangle will encompass both corners as well as all of the space between them.
/// </summary>
/// <param name="corner1">The first corner to use</param>
/// <param name="corner2">The second corner to use</param>
/// <returns></returns>
public static RectangleF FromCorners(Vector2 corner1, Vector2 corner2) {
var minX = Math.Min(corner1.X, corner2.X);
var minY = Math.Min(corner1.Y, corner2.Y);
var maxX = Math.Max(corner1.X, corner2.X);
var maxY = Math.Max(corner1.Y, corner2.Y);
return new RectangleF(minX, minY, maxX - minX, maxY - minY);
}
/// <inheritdoc cref="Rectangle.Offset(Vector2)"/>
public void Offset(Vector2 amount) {
this.X += amount.X;
this.Y += amount.Y;
/// <summary>
/// Converts an int-based rectangle to a float-based rectangle.
/// </summary>
/// <param name="rect">The rectangle to convert</param>
/// <returns>The resulting rectangle</returns>
public static explicit operator RectangleF(Rectangle rect) {
return new RectangleF(rect.X, rect.Y, rect.Width, rect.Height);
}
/// <summary>Returns a string that represents the current object.</summary>
/// <returns>A string that represents the current object.</returns>
public override string ToString() {
return "{X:" + this.X + " Y:" + this.Y + " Width:" + this.Width + " Height:" + this.Height + "}";
/// <inheritdoc cref="Equals(RectangleF)"/>
public static bool operator ==(RectangleF a, RectangleF b) {
return a.X == b.X && a.Y == b.Y && a.Width == b.Width && a.Height == b.Height;
}
/// <inheritdoc cref="Rectangle.Union(Rectangle, Rectangle)"/>
public static RectangleF Union(RectangleF value1, RectangleF value2) {
var x = Math.Min(value1.X, value2.X);
var y = Math.Min(value1.Y, value2.Y);
return new RectangleF(x, y, Math.Max(value1.Right, value2.Right) - x, Math.Max(value1.Bottom, value2.Bottom) - y);
}
/// <inheritdoc cref="Rectangle.Deconstruct"/>
public void Deconstruct(out float x, out float y, out float width, out float height) {
x = this.X;
y = this.Y;
width = this.Width;
height = this.Height;
/// <inheritdoc cref="Equals(RectangleF)"/>
public static bool operator !=(RectangleF a, RectangleF b) {
return !(a == b);
}
}