@pdfme/pdf-lib
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Create and modify PDF files with JavaScript
84 lines • 2.84 kB
JavaScript
"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
const intersections_1 = require("../intersections");
const maths_1 = require("../maths");
const GraphElement_1 = __importDefault(require("./GraphElement"));
const Point_1 = __importDefault(require("./Point"));
class Line extends GraphElement_1.default {
origin() {
return this.A;
}
dirVect() {
return (0, maths_1.vector)(this.A, this.B);
}
constructor(A = new Point_1.default(), B = new Point_1.default()) {
super();
Object.defineProperty(this, "A", {
enumerable: true,
configurable: true,
writable: true,
value: void 0
});
Object.defineProperty(this, "B", {
enumerable: true,
configurable: true,
writable: true,
value: void 0
});
this.A = A;
this.B = B;
}
/** Line equation */
y(x) {
const a = this.a();
const b = this.b();
return a * x + b;
}
/** The slope */
a() {
const dirVect = this.dirVect();
return dirVect.y / dirVect.x;
}
/** Origin y coordinate */
b() {
const O = this.origin().toCoords();
const a = this.a();
return O.y - a * O.x;
}
isEqual(element) {
const vect = this.dirVect();
return (element instanceof Line &&
(0, maths_1.isColinear)(vect, element.dirVect()) &&
((0, maths_1.isEqual)(vect.x, 0)
? // We need to take care of the case of the vertical line
(0, maths_1.isEqual)(this.origin().toCoords().x, element.origin().toCoords().x)
: (0, maths_1.isEqual)(this.b(), element.b())));
}
/** Reversed line equation */
x(y) {
const dirVect = this.dirVect();
return ((y - this.b()) * dirVect.x) / dirVect.y;
}
includes(P) {
const { x, y } = P.toCoords();
const vect = this.dirVect();
return (0, maths_1.isEqual)(vect.x, 0) ? (0, maths_1.isEqual)(this.origin().toCoords().x, x) : (0, maths_1.isEqual)(this.y(x), y);
}
/** This is used to standarsize type Segment | HalfLine | Line */
getLine() {
const line = new Line(this.origin(), this.B);
return line;
}
orthoProjection(P) {
const vectOrtho = (0, maths_1.orthogonal)(this.dirVect());
const A = new Point_1.default(P.toCoords());
const ortho = new Line(A, A.plus(vectOrtho));
const H = (0, intersections_1.intersectionLine)(this, ortho)[0];
return new Point_1.default(H);
}
}
exports.default = Line;
//# sourceMappingURL=Line.js.map