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import Coord from "./Coord";
/** A rectangle on a grid whose origin is in the top left. */
export default class Rect {
private readonly _topLeft: Coord;
private readonly _width: number;
private readonly _height: number;
constructor(
topLeftX: number,
topLeftY: number,
width: number,
height: number,
) {
this._topLeft = new Coord(topLeftX, topLeftY);
this._width = width;
this._height = height;
}
/** Width of this rectangle. */
get width(): number {
return this._width;
}
/** Height of this rectangle. */
get height(): number {
return this._height;
}
/** Coord of the top-left point of this rectangle. */
get topLeft(): Coord {
return this._topLeft;
}
/** Coord of the bottom-right point of this rectangle. */
get bottomRight(): Coord {
return new Coord(
this._topLeft.x + this._width,
this._topLeft.y + this._height,
);
}
get center(): Coord {
return new Coord(
this.topLeft.x + (this.bottomRight.x - this.topLeft.x) / 2,
this.topLeft.y + (this.bottomRight.y - this.topLeft.y) / 2,
);
}
/** Determine if this rectangle contains the point at `coord`. */
containsCoord(coord: Coord): boolean {
return (
this.topLeft.x <= coord.x &&
coord.x <= this.bottomRight.x &&
this.topLeft.y <= coord.y &&
coord.y <= this.bottomRight.y
);
}
verticallyContainsCoord(coord: Coord): boolean {
return this.topLeft.y <= coord.y && coord.y <= this.bottomRight.y;
}
horizontallyContainsCoord(coord: Coord): boolean {
return this.topLeft.x <= coord.x && coord.x <= this.bottomRight.x;
}
extend(other: Rect): Rect {
const topLeftX = Math.min(
this.topLeft.x,
this.bottomRight.x,
other.topLeft.x,
other.bottomRight.x,
);
const topLeftY = Math.min(
this.topLeft.y,
this.bottomRight.y,
other.topLeft.y,
other.bottomRight.y,
);
const bottomRightX = Math.max(
this.topLeft.x,
this.bottomRight.x,
other.topLeft.x,
other.bottomRight.x,
);
const bottomRightY = Math.max(
this.topLeft.y,
this.bottomRight.y,
other.topLeft.y,
other.bottomRight.y,
);
return new Rect(
topLeftX,
topLeftY,
bottomRightX - topLeftX,
bottomRightY - topLeftY,
);
}
}
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