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80 lines
2.6 KiB
TypeScript
80 lines
2.6 KiB
TypeScript
import {
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ellipse,
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ellipseSegmentInterceptPoints,
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ellipseIncludesPoint,
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ellipseTouchesPoint,
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} from "./ellipse";
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import { point } from "./point";
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import { segment } from "./segment";
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import type { Ellipse, GlobalPoint } from "./types";
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describe("point and ellipse", () => {
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it("point on ellipse", () => {
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const target: Ellipse<GlobalPoint> = ellipse(point(1, 2), 2, 1);
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[point(1, 3), point(1, 1), point(3, 2), point(-1, 2)].forEach((p) => {
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expect(ellipseTouchesPoint(p, target)).toBe(true);
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});
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expect(ellipseTouchesPoint(point(-0.4, 2.7), target, 0.1)).toBe(true);
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expect(ellipseTouchesPoint(point(-0.4, 2.71), target, 0.01)).toBe(true);
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expect(ellipseTouchesPoint(point(2.4, 2.7), target, 0.1)).toBe(true);
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expect(ellipseTouchesPoint(point(2.4, 2.71), target, 0.01)).toBe(true);
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expect(ellipseTouchesPoint(point(2, 1.14), target, 0.1)).toBe(true);
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expect(ellipseTouchesPoint(point(2, 1.14), target, 0.01)).toBe(true);
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expect(ellipseTouchesPoint(point(0, 1.14), target, 0.1)).toBe(true);
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expect(ellipseTouchesPoint(point(0, 1.14), target, 0.01)).toBe(true);
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expect(ellipseTouchesPoint(point(0, 2.8), target)).toBe(false);
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expect(ellipseTouchesPoint(point(2, 1.2), target)).toBe(false);
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});
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it("point in ellipse", () => {
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const target: Ellipse<GlobalPoint> = ellipse(point(0, 0), 2, 1);
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[point(0, 1), point(0, -1), point(2, 0), point(-2, 0)].forEach((p) => {
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expect(ellipseIncludesPoint(p, target)).toBe(true);
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});
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expect(ellipseIncludesPoint(point(-1, 0.8), target)).toBe(true);
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expect(ellipseIncludesPoint(point(1, -0.8), target)).toBe(true);
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// Point on outline
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expect(ellipseIncludesPoint(point(2, 0), target)).toBe(true);
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expect(ellipseIncludesPoint(point(-1, 1), target)).toBe(false);
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expect(ellipseIncludesPoint(point(-1.4, 0.8), target)).toBe(false);
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});
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});
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describe("line and ellipse", () => {
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it("detects outside segment", () => {
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const e = ellipse(point(0, 0), 2, 2);
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expect(
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ellipseSegmentInterceptPoints(
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e,
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segment<GlobalPoint>(point(-100, 0), point(-10, 0)),
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),
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).toEqual([]);
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expect(
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ellipseSegmentInterceptPoints(
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e,
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segment<GlobalPoint>(point(-10, 0), point(10, 0)),
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),
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).toEqual([point(-2, 0), point(2, 0)]);
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expect(
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ellipseSegmentInterceptPoints(
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e,
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segment<GlobalPoint>(point(-10, -2), point(10, -2)),
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),
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).toEqual([point(0, -2)]);
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expect(
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ellipseSegmentInterceptPoints(
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e,
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segment<GlobalPoint>(point(0, -1), point(0, 1)),
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),
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).toEqual([]);
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});
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});
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