Cesium-Prequel/Specs/Core/TipsifySpec.js

import { Tipsify } from "../../Source/Cesium.js";

describe("Core/Tipsify", function () {
  it("can calculate the ACMR", function () {
    //Hexagon formed from 6 triangles, 7 vertices
    expect(
      Tipsify.calculateACMR({
        indices: [0, 1, 2, 0, 2, 3, 0, 3, 4, 0, 4, 5, 0, 5, 6, 0, 1, 6],
        maximumIndex: 6,
        cacheSize: 3,
      })
    ).toEqual(2);
  });

  it("can calculate the ACMR without a specified maximum index", function () {
    expect(
      Tipsify.calculateACMR({
        indices: [0, 1, 2, 0, 2, 3, 0, 3, 4, 0, 4, 5, 0, 5, 6, 0, 1, 6],
        cacheSize: 3,
      })
    ).toEqual(2);
  });

  it("throws when calculating ACMR (1 of 4)", function () {
    expect(function () {
      Tipsify.calculateACMR({
        indices: undefined,
        maximumIndex: 1,
        cacheSize: 3,
      });
    }).toThrowDeveloperError();
  });

  it("throws when calculating ACMR (2 of 4)", function () {
    expect(function () {
      Tipsify.calculateACMR({
        indices: [1, 2, 3, 4],
        maximumIndex: 1,
        cacheSize: 3,
      });
    }).toThrowDeveloperError();
  });

  it("throws when calculating ACMR (3 of 4)", function () {
    expect(function () {
      Tipsify.calculateACMR({
        indices: [0, 1, 2],
        maximumIndex: -1,
        cacheSize: 2,
      });
    }).toThrowDeveloperError();
  });

  it("throws when calculating ACMR (4 of 4)", function () {
    expect(function () {
      Tipsify.calculateACMR({
        indices: [0, 1, 2],
        maximumIndex: 2,
        cacheSize: 2,
      });
    }).toThrowDeveloperError();
  });

  it("throws when executing Tipsify (1 of 5)", function () {
    expect(function () {
      Tipsify.tipsify({ indices: undefined, maximumIndex: 1, cacheSize: 3 });
    }).toThrowDeveloperError();
  });

  it("throws when executing Tipsify (2 of 5)", function () {
    expect(function () {
      Tipsify.tipsify({ indices: [1, 2, 3, 4], maximumIndex: 1, cacheSize: 3 });
    }).toThrowDeveloperError();
  });

  it("throws when executing Tipsify (3 of 5)", function () {
    expect(function () {
      Tipsify.tipsify({ indices: [1, 2, 3], maximumIndex: -1, cacheSize: 3 });
    }).toThrowDeveloperError();
  });

  it("throws when executing Tipsify (4 of 5)", function () {
    expect(function () {
      Tipsify.tipsify({ indices: [0, 1, 2], maximumIndex: 2, cacheSize: 2 });
    }).toThrowDeveloperError();
  });

  it("throws when executing Tipsify (5 of 5)", function () {
    expect(function () {
      Tipsify.tipsify();
    }).toThrowDeveloperError();
  });

  it("can lower ACMR using the Tipsify algorithm", function () {
    var indices = [
      0,
      1,
      7,
      1,
      7,
      8,
      1,
      2,
      8,
      2,
      8,
      9,
      2,
      3,
      9,
      3,
      9,
      10,
      3,
      4,
      10,
      4,
      10,
      11,
      4,
      5,
      11,
      5,
      11,
      12,
      6,
      13,
      14,
      6,
      7,
      14,
      7,
      14,
      15,
      7,
      8,
      15,
      8,
      15,
      16,
      8,
      9,
      16,
      9,
      16,
      17,
      9,
      10,
      17,
      10,
      17,
      18,
      10,
      11,
      18,
      11,
      18,
      19,
      11,
      12,
      19,
      12,
      19,
      20,
      13,
      21,
      22,
      13,
      14,
      22,
      14,
      22,
      23,
      14,
      15,
      23,
      15,
      23,
      24,
      15,
      16,
      24,
      16,
      24,
      25,
      16,
      17,
      25,
      17,
      25,
      26,
      17,
      18,
      26,
      18,
      26,
      27,
      18,
      19,
      27,
      19,
      27,
      28,
      19,
      20,
      28,
    ];
    var acmrBefore = Tipsify.calculateACMR({
      indices: indices,
      maximumIndex: 28,
      cacheSize: 6,
    });
    var result = Tipsify.tipsify({
      indices: indices,
      maximumIndex: 28,
      cacheSize: 6,
    });
    var acmrAfter = Tipsify.calculateACMR({
      indices: result,
      maximumIndex: 28,
      cacheSize: 6,
    });
    expect(acmrAfter).toBeLessThan(acmrBefore);
  });

  it("can Tipsify without knowing the maximum index", function () {
    var indices = [
      0,
      1,
      7,
      1,
      7,
      8,
      1,
      2,
      8,
      2,
      8,
      9,
      2,
      3,
      9,
      3,
      9,
      10,
      3,
      4,
      10,
      4,
      10,
      11,
      4,
      5,
      11,
      5,
      11,
      12,
      6,
      13,
      14,
      6,
      7,
      14,
      7,
      14,
      15,
      7,
      8,
      15,
      8,
      15,
      16,
      8,
      9,
      16,
      9,
      16,
      17,
      9,
      10,
      17,
      10,
      17,
      18,
      10,
      11,
      18,
      11,
      18,
      19,
      11,
      12,
      19,
      12,
      19,
      20,
      13,
      21,
      22,
      13,
      14,
      22,
      14,
      22,
      23,
      14,
      15,
      23,
      15,
      23,
      24,
      15,
      16,
      24,
      16,
      24,
      25,
      16,
      17,
      25,
      17,
      25,
      26,
      17,
      18,
      26,
      18,
      26,
      27,
      18,
      19,
      27,
      19,
      27,
      28,
      19,
      20,
      28,
    ];
    expect(Tipsify.tipsify({ indices: indices, cacheSize: 6 })).toEqual(
      Tipsify.tipsify({ indices: indices, maximumIndex: 28, cacheSize: 6 })
    );
  });
});