@foblex/2d
Version:
An Angular library for 2D geometric computations, providing classes and utilities for manipulating points, lines, vectors, rectangles, arcs, and transformations.
95 lines • 15.7 kB
JavaScript
import { PointExtensions } from '../point';
export class RectExtensions {
static initialize(x = 0, y = 0, width = 0, height = 0) {
if (width < 0) {
x = x + width;
width = -width;
}
if (height < 0) {
y = y + height;
height = -height;
}
const gravityCenter = PointExtensions.initialize(x + (width / 2), y + (height / 2));
return { x: x, y: y, width: width, height: height, gravityCenter: gravityCenter };
}
static copy(rect) {
return RectExtensions.initialize(rect.x, rect.y, rect.width, rect.height);
}
static fromElement(element) {
const { x, y, width, height } = element.getBoundingClientRect();
return RectExtensions.initialize(x, y, width, height);
}
static isIncludePoint(rect, point) {
return point.x >= RectExtensions.left(rect) && point.x <= RectExtensions.right(rect) && point.y >= RectExtensions.top(rect) && point.y <= RectExtensions.bottom(rect);
}
static intersectionWithRect(rect1, rect2) {
return !(rect1.x + rect1.width < rect2.x ||
rect2.x + rect2.width < rect1.x ||
rect1.y + rect1.height < rect2.y ||
rect2.y + rect2.height < rect1.y);
}
static left(rect) {
return rect.x;
}
static top(rect) {
return rect.y;
}
static right(rect) {
return rect.x + rect.width;
}
static bottom(rect) {
return rect.y + rect.height;
}
static addPoint(rect, point) {
const rectCopy = RectExtensions.copy(rect);
rectCopy.x += point.x;
rectCopy.y += point.y;
return this.initialize(rectCopy.x, rectCopy.y, rectCopy.width, rectCopy.height);
}
static mult(rect, value) {
const rectCopy = RectExtensions.copy(rect);
rectCopy.x *= value;
rectCopy.y *= value;
rectCopy.width *= value;
rectCopy.height *= value;
return this.initialize(rectCopy.x, rectCopy.y, rectCopy.width, rectCopy.height);
}
static div(rect, value) {
const rectCopy = RectExtensions.copy(rect);
rectCopy.x /= value;
rectCopy.y /= value;
rectCopy.width /= value;
rectCopy.height /= value;
return this.initialize(rectCopy.x, rectCopy.y, rectCopy.width, rectCopy.height);
}
static addPointToSize(rect, point) {
const rectCopy = RectExtensions.copy(rect);
rectCopy.width += point.x;
rectCopy.height += point.y;
return this.initialize(rectCopy.x, rectCopy.y, rectCopy.width, rectCopy.height);
}
static union(rects) {
if (!rects || rects.length === 0) {
return null;
}
return rects.reduce((result, rect) => {
const minX = Math.min(result.x, rect.x);
const minY = Math.min(result.y, rect.y);
const maxX = Math.max(result.x + result.width, rect.x + rect.width);
const maxY = Math.max(result.y + result.height, rect.y + rect.height);
return RectExtensions.initialize(minX, minY, maxX - minX, maxY - minY);
}, rects[0]);
}
static elementTransform(rect, element) {
const matrix = element.getBoundingClientRect();
const position = PointExtensions.sub(rect, PointExtensions.initialize(matrix.left, matrix.top));
return RectExtensions.initialize(position.x, position.y, rect.width, rect.height);
}
static updateIsNotFinite(rect) {
if (!Number.isFinite(rect.width) || !Number.isFinite(rect.height) || !Number.isFinite(rect.x) || !Number.isFinite(rect.y)) {
return RectExtensions.initialize(0, 0, 0, 0);
}
return rect;
}
}
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{ IRect } from './i-rect';\nimport { IPoint, PointExtensions } from '../point';\n\nexport class RectExtensions {\n\n  public static initialize(x: number = 0, y: number = 0, width: number = 0, height: number = 0): IRect {\n\n    if (width < 0) {\n      x = x + width;\n      width = -width;\n    }\n    if (height < 0) {\n      y = y + height;\n      height = -height;\n    }\n    const gravityCenter = PointExtensions.initialize(x + (width / 2), y + (height / 2));\n\n    return { x: x, y: y, width: width, height: height, gravityCenter: gravityCenter };\n  }\n\n  public static copy(rect: IRect): IRect {\n    return RectExtensions.initialize(rect.x, rect.y, rect.width, rect.height);\n  }\n\n  public static fromElement(element: HTMLElement | SVGElement): IRect {\n    const { x, y, width, height } = element.getBoundingClientRect();\n    return RectExtensions.initialize(x, y, width, height);\n  }\n\n  public static isIncludePoint(rect: IRect, point: IPoint): boolean {\n    return point.x >= RectExtensions.left(rect) && point.x <= RectExtensions.right(rect) && point.y >= RectExtensions.top(rect) && point.y <= RectExtensions.bottom(rect);\n  }\n\n  public static intersectionWithRect(rect1: IRect, rect2: IRect): boolean {\n    return !(rect1.x + rect1.width < rect2.x ||\n      rect2.x + rect2.width < rect1.x ||\n      rect1.y + rect1.height < rect2.y ||\n      rect2.y + rect2.height < rect1.y);\n  }\n\n  public static left(rect: IRect): number {\n    return rect.x;\n  }\n\n  public static top(rect: IRect): number {\n    return rect.y;\n  }\n\n  public static right(rect: IRect): number {\n    return rect.x + rect.width;\n  }\n\n  public static bottom(rect: IRect): number {\n    return rect.y + rect.height;\n  }\n\n  public static addPoint(rect: IRect, point: IPoint): IRect {\n    const rectCopy = RectExtensions.copy(rect);\n    rectCopy.x += point.x;\n    rectCopy.y += point.y;\n    return this.initialize(rectCopy.x, rectCopy.y, rectCopy.width, rectCopy.height);\n  }\n\n  public static mult(rect: IRect, value: number): IRect {\n    const rectCopy = RectExtensions.copy(rect);\n    rectCopy.x *= value;\n    rectCopy.y *= value;\n    rectCopy.width *= value;\n    rectCopy.height *= value;\n    return this.initialize(rectCopy.x, rectCopy.y, rectCopy.width, rectCopy.height);\n  }\n\n  public static div(rect: IRect, value: number): IRect {\n    const rectCopy = RectExtensions.copy(rect);\n    rectCopy.x /= value;\n    rectCopy.y /= value;\n    rectCopy.width /= value;\n    rectCopy.height /= value;\n    return this.initialize(rectCopy.x, rectCopy.y, rectCopy.width, rectCopy.height);\n  }\n\n  public static addPointToSize(rect: IRect, point: IPoint): IRect {\n    const rectCopy = RectExtensions.copy(rect);\n    rectCopy.width += point.x;\n    rectCopy.height += point.y;\n    return this.initialize(rectCopy.x, rectCopy.y, rectCopy.width, rectCopy.height);\n  }\n\n  public static union(rects: IRect[]): IRect | null {\n    if (!rects || rects.length === 0) {\n      return null;\n    }\n    return rects.reduce((result: IRect, rect) => {\n      const minX = Math.min(result.x, rect.x);\n      const minY = Math.min(result.y, rect.y);\n      const maxX = Math.max(result.x + result.width, rect.x + rect.width);\n      const maxY = Math.max(result.y + result.height, rect.y + rect.height);\n      return RectExtensions.initialize(minX, minY, maxX - minX, maxY - minY);\n    }, rects[0]);\n  }\n\n  public static elementTransform(rect: IRect, element: HTMLElement | SVGElement): IRect {\n    const matrix = element.getBoundingClientRect();\n    const position = PointExtensions.sub(rect, PointExtensions.initialize(matrix.left, matrix.top));\n    return RectExtensions.initialize(position.x, position.y, rect.width, rect.height);\n  }\n\n  public static updateIsNotFinite(rect: IRect): IRect {\n    if (!Number.isFinite(rect.width) || !Number.isFinite(rect.height) || !Number.isFinite(rect.x) || !Number.isFinite(rect.y)) {\n      return RectExtensions.initialize(0, 0, 0, 0);\n    }\n    return rect;\n  }\n}\n"]}