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91 lines
2.9 KiB
TypeScript
91 lines
2.9 KiB
TypeScript
import type { GlobalPoint, LineSegment, Polygon, Radians } from "../../math";
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import {
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point,
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lineSegment,
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polygon,
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pointOnLineSegment,
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pointOnPolygon,
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polygonIncludesPoint,
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segmentsIntersectAt,
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} from "../../math";
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import { pointInEllipse, pointOnEllipse, type Ellipse } from "./shape";
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describe("point and line", () => {
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const s: LineSegment<GlobalPoint> = lineSegment(point(1, 0), point(1, 2));
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it("point on the line", () => {
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expect(pointOnLineSegment(point(0, 1), s)).toBe(false);
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expect(pointOnLineSegment(point(1, 1), s, 0)).toBe(true);
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expect(pointOnLineSegment(point(2, 1), s)).toBe(false);
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});
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});
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describe("point and polygon", () => {
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const poly: Polygon<GlobalPoint> = polygon(
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point(10, 10),
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point(50, 10),
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point(50, 50),
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point(10, 50),
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);
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it("point on polygon", () => {
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expect(pointOnPolygon(point(30, 10), poly)).toBe(true);
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expect(pointOnPolygon(point(50, 30), poly)).toBe(true);
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expect(pointOnPolygon(point(30, 50), poly)).toBe(true);
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expect(pointOnPolygon(point(10, 30), poly)).toBe(true);
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expect(pointOnPolygon(point(30, 30), poly)).toBe(false);
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expect(pointOnPolygon(point(30, 70), poly)).toBe(false);
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});
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it("point in polygon", () => {
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const poly: Polygon<GlobalPoint> = polygon(
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point(0, 0),
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point(2, 0),
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point(2, 2),
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point(0, 2),
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);
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expect(polygonIncludesPoint(point(1, 1), poly)).toBe(true);
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expect(polygonIncludesPoint(point(3, 3), poly)).toBe(false);
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});
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});
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describe("point and ellipse", () => {
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const ellipse: Ellipse<GlobalPoint> = {
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center: point(0, 0),
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angle: 0 as Radians,
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halfWidth: 2,
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halfHeight: 1,
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};
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it("point on ellipse", () => {
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[point(0, 1), point(0, -1), point(2, 0), point(-2, 0)].forEach((p) => {
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expect(pointOnEllipse(p, ellipse)).toBe(true);
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});
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expect(pointOnEllipse(point(-1.4, 0.7), ellipse, 0.1)).toBe(true);
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expect(pointOnEllipse(point(-1.4, 0.71), ellipse, 0.01)).toBe(true);
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expect(pointOnEllipse(point(1.4, 0.7), ellipse, 0.1)).toBe(true);
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expect(pointOnEllipse(point(1.4, 0.71), ellipse, 0.01)).toBe(true);
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expect(pointOnEllipse(point(1, -0.86), ellipse, 0.1)).toBe(true);
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expect(pointOnEllipse(point(1, -0.86), ellipse, 0.01)).toBe(true);
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expect(pointOnEllipse(point(-1, -0.86), ellipse, 0.1)).toBe(true);
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expect(pointOnEllipse(point(-1, -0.86), ellipse, 0.01)).toBe(true);
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expect(pointOnEllipse(point(-1, 0.8), ellipse)).toBe(false);
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expect(pointOnEllipse(point(1, -0.8), ellipse)).toBe(false);
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});
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it("point in ellipse", () => {
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[point(0, 1), point(0, -1), point(2, 0), point(-2, 0)].forEach((p) => {
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expect(pointInEllipse(p, ellipse)).toBe(true);
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});
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expect(pointInEllipse(point(-1, 0.8), ellipse)).toBe(true);
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expect(pointInEllipse(point(1, -0.8), ellipse)).toBe(true);
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expect(pointInEllipse(point(-1, 1), ellipse)).toBe(false);
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expect(pointInEllipse(point(-1.4, 0.8), ellipse)).toBe(false);
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});
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});
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