Robin Davies
89 lines
3.1 KiB
TypeScript
89 lines
3.1 KiB
TypeScript
// Copyright (c) 2021 Robin Davies
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy of
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// this software and associated documentation files (the "Software"), to deal in
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// the Software without restriction, including without limitation the rights to
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// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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// the Software, and to permit persons to whom the Software is furnished to do so,
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// subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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// FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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// COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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// IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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const LARGE_NUMBER = 0x1FFFFFFF;
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const EMPTY_WIDTH = -LARGE_NUMBER * 2;
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class Rect {
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x: number;
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y: number;
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width: number;
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height: number;
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constructor(x: number = LARGE_NUMBER, y: number = LARGE_NUMBER, width: number = EMPTY_WIDTH, height: number = EMPTY_WIDTH)
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{
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this.x = x; this.y = y; this.width = width; this.height = height;
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}
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toString() { return '{' + this.x + "," + this.y + " " + this.width + "," + this.height +"}"; }
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copy(): Rect {
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let result = new Rect();
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result.x = this.x;
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result.y = this.y;
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result.width = this.width;
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result.height = this.height;
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return result;
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}
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contains(x: number, y: number)
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{
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return (x >= this.x)
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&& x < this.x+this.width
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&& y >= this.y
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&& y < this.y + this.height;
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}
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get right(): number {
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return this.x + this.width;
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}
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get bottom(): number {
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return this.y + this.height;
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}
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isEmpty(): boolean {
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return this.width === 0 || this.height === 0;
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}
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clear(): void {
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this.x = LARGE_NUMBER;
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this.y = LARGE_NUMBER;
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this.width = EMPTY_WIDTH;
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this.height = EMPTY_WIDTH;
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}
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accumulate(rect: Rect): void {
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let right = Math.max(rect.x + rect.width, this.x + this.width);
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let bottom = Math.max(rect.y + rect.height, this.y + this.height);
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this.x = Math.min(rect.x, this.x);
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this.y = Math.min(rect.y, this.y);
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this.width = right - this.x;
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this.height = bottom - this.y;
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}
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union(rect: Rect): Rect {
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let result = new Rect();
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result.x = Math.min(this.x, rect.x);
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result.y = Math.min(this.y, rect.y);
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result.width = Math.max(this.x + this.width, rect.x + rect.width) - result.x;
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result.height = Math.max(this.y + this.height, rect.x + rect.height) - result.y;
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return result;
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}
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offset(xOffset: number, yOffset: number) {
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this.x += xOffset;
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this.y += yOffset;
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}
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}
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export default Rect; |