Cesium-Prequel/Specs/Core/PolylineVolumeGeometrySpec.js

import { Cartesian2 } from "../../Source/Cesium.js";
import { Cartesian3 } from "../../Source/Cesium.js";
import { CornerType } from "../../Source/Cesium.js";
import { Ellipsoid } from "../../Source/Cesium.js";
import { PolylineVolumeGeometry } from "../../Source/Cesium.js";
import { VertexFormat } from "../../Source/Cesium.js";
import createPackableSpecs from "../createPackableSpecs.js";

describe("Core/PolylineVolumeGeometry", function () {
  var shape;

  beforeAll(function () {
    shape = [
      new Cartesian2(-100, -100),
      new Cartesian2(100, -100),
      new Cartesian2(100, 100),
      new Cartesian2(-100, 100),
    ];
  });

  it("throws without polyline positions", function () {
    expect(function () {
      return new PolylineVolumeGeometry({});
    }).toThrowDeveloperError();
  });

  it("throws without shape positions", function () {
    expect(function () {
      return new PolylineVolumeGeometry({
        polylinePositions: [new Cartesian3()],
      });
    }).toThrowDeveloperError();
  });

  it("createGeometry returnes undefined without 2 unique polyline positions", function () {
    var geometry = PolylineVolumeGeometry.createGeometry(
      new PolylineVolumeGeometry({
        polylinePositions: [new Cartesian3()],
        shapePositions: shape,
      })
    );
    expect(geometry).toBeUndefined();
  });

  it("createGeometry returnes undefined without 3 unique shape positions", function () {
    var geometry = PolylineVolumeGeometry.createGeometry(
      new PolylineVolumeGeometry({
        polylinePositions: [Cartesian3.UNIT_X, Cartesian3.UNIT_Y],
        shapePositions: [
          Cartesian2.UNIT_X,
          Cartesian2.UNIT_X,
          Cartesian2.UNIT_X,
        ],
      })
    );
    expect(geometry).toBeUndefined();
  });

  it("computes positions", function () {
    var m = PolylineVolumeGeometry.createGeometry(
      new PolylineVolumeGeometry({
        vertexFormat: VertexFormat.POSITION_ONLY,
        polylinePositions: Cartesian3.fromDegreesArray([
          90.0,
          -30.0,
          90.0,
          -35.0,
        ]),
        cornerType: CornerType.MITERED,
        shapePositions: shape,
      })
    );

    // 6 positions * 4 box positions * 2 to duplicate for normals + 4 positions * 2 ends
    expect(m.attributes.position.values.length).toEqual(56 * 3);
    // 5 segments + 8 triangles per segment + 2 triangles * 2 ends
    expect(m.indices.length).toEqual(44 * 3);
  });

  it("computes positions, clockwise shape", function () {
    var m = PolylineVolumeGeometry.createGeometry(
      new PolylineVolumeGeometry({
        vertexFormat: VertexFormat.POSITION_ONLY,
        polylinePositions: Cartesian3.fromDegreesArray([
          90.0,
          -30.0,
          90.0,
          -35.0,
        ]),
        cornerType: CornerType.MITERED,
        shapePositions: shape.reverse(),
      })
    );

    expect(m.attributes.position.values.length).toEqual(56 * 3);
    expect(m.indices.length).toEqual(44 * 3);
  });

  it("computes most vertex attributes", function () {
    var m = PolylineVolumeGeometry.createGeometry(
      new PolylineVolumeGeometry({
        vertexFormat: VertexFormat.POSITION_NORMAL_AND_ST,
        polylinePositions: Cartesian3.fromDegreesArray([
          90.0,
          -30.0,
          90.0,
          -35.0,
        ]),
        cornerType: CornerType.MITERED,
        shapePositions: shape,
      })
    );

    var numVertices = 56;
    var numTriangles = 44;
    expect(m.attributes.position.values.length).toEqual(numVertices * 3);
    expect(m.attributes.st.values.length).toEqual(numVertices * 2);
    expect(m.attributes.normal.values.length).toEqual(numVertices * 3);
    expect(m.indices.length).toEqual(numTriangles * 3);
  });

  //https://github.com/CesiumGS/cesium/issues/3609
  xit("compute all vertex attributes", function () {
    var m = PolylineVolumeGeometry.createGeometry(
      new PolylineVolumeGeometry({
        vertexFormat: VertexFormat.ALL,
        polylinePositions: Cartesian3.fromDegreesArray([
          90.0,
          -30.0,
          90.0,
          -35.0,
        ]),
        cornerType: CornerType.MITERED,
        shapePositions: shape,
      })
    );

    var numVertices = 56;
    var numTriangles = 44;
    expect(m.attributes.position.values.length).toEqual(numVertices * 3);
    expect(m.attributes.st.values.length).toEqual(numVertices * 2);
    expect(m.attributes.normal.values.length).toEqual(numVertices * 3);
    expect(m.attributes.tangent.values.length).toEqual(numVertices * 3);
    expect(m.attributes.bitangent.values.length).toEqual(numVertices * 3);
    expect(m.indices.length).toEqual(numTriangles * 3);
  });

  it("computes right turn", function () {
    var m = PolylineVolumeGeometry.createGeometry(
      new PolylineVolumeGeometry({
        vertexFormat: VertexFormat.POSITION_ONLY,
        polylinePositions: Cartesian3.fromDegreesArray([
          90.0,
          -30.0,
          90.0,
          -31.0,
          91.0,
          -31.0,
        ]),
        cornerType: CornerType.MITERED,
        shapePositions: shape,
      })
    );

    // (3 duplicates * 2 ends + 2 duplicates * 2 middle points + 4 duplicates * 1 corner) * 4 box positions
    expect(m.attributes.position.values.length).toEqual(56 * 3);
    // 8 triangles * 5 segments + 2 triangles * 2 ends
    expect(m.indices.length).toEqual(44 * 3);
  });

  it("computes left turn", function () {
    var m = PolylineVolumeGeometry.createGeometry(
      new PolylineVolumeGeometry({
        vertexFormat: VertexFormat.POSITION_ONLY,
        polylinePositions: Cartesian3.fromDegreesArray([
          90.0,
          -30.0,
          90.0,
          -31.0,
          89.0,
          -31.0,
        ]),
        cornerType: CornerType.MITERED,
        shapePositions: shape,
      })
    );

    expect(m.attributes.position.values.length).toEqual(56 * 3);
    expect(m.indices.length).toEqual(44 * 3);
  });

  it("computes with rounded corners", function () {
    var m = PolylineVolumeGeometry.createGeometry(
      new PolylineVolumeGeometry({
        vertexFormat: VertexFormat.POSITION_ONLY,
        polylinePositions: Cartesian3.fromDegreesArray([
          90.0,
          -30.0,
          90.0,
          -31.0,
          89.0,
          -31.0,
          89.0,
          -32.0,
        ]),
        cornerType: CornerType.ROUNDED,
        shapePositions: shape,
      })
    );

    var corners = 36 * 4 * 4; // positions * 4 for shape * 4 for normal duplication
    var numVertices = corners + 72; // corners + 9 positions * 2 for normal duplication * 4 for shape
    var numTriangles = corners + 60; // corners + 8 triangles * 7 segments + 2 on each end
    expect(m.attributes.position.values.length).toEqual(numVertices * 3);
    expect(m.indices.length).toEqual(numTriangles * 3);
  });

  it("computes with beveled corners", function () {
    var m = PolylineVolumeGeometry.createGeometry(
      new PolylineVolumeGeometry({
        vertexFormat: VertexFormat.POSITION_ONLY,
        polylinePositions: Cartesian3.fromDegreesArray([
          90.0,
          -30.0,
          90.0,
          -31.0,
          89.0,
          -31.0,
          89.0,
          -32.0,
        ]),
        cornerType: CornerType.BEVELED,
        shapePositions: shape,
      })
    );

    var corners = 4 * 4; // 4 for shape * 4 for normal duplication
    var numVertices = corners + 72; // corners + 9 positions * 2 for normal duplication * 4 for shape
    var numTriangles = corners + 60; // corners + 8 triangles * 7 segments + 2 on each end
    expect(m.attributes.position.values.length).toEqual(numVertices * 3);
    expect(m.indices.length).toEqual(3 * numTriangles);
  });

  it("computes sharp turns", function () {
    var m = PolylineVolumeGeometry.createGeometry(
      new PolylineVolumeGeometry({
        vertexFormat: VertexFormat.POSITION_ONLY,
        polylinePositions: Cartesian3.fromDegreesArrayHeights([
          2.00571672577652,
          52.7781459942399,
          500,
          1.99188457974115,
          52.7764958852886,
          500,
          2.01325961458495,
          52.7674170680511,
          500,
          1.98708058340534,
          52.7733979856253,
          500,
          2.00634853946644,
          52.7650460748473,
          500,
        ]),
        cornerType: CornerType.BEVELED,
        shapePositions: shape,
      })
    );

    // (8 positions * 3 duplications + 1 duplication * 6 corners) * 4 for shape
    expect(m.attributes.position.values.length).toEqual(120 * 3);
    // 13 segments * 8 triangles per segment + 2 * 2 for ends
    expect(m.indices.length).toEqual(108 * 3);
  });

  it("computes straight volume", function () {
    var m = PolylineVolumeGeometry.createGeometry(
      new PolylineVolumeGeometry({
        vertexFormat: VertexFormat.POSITION_ONLY,
        polylinePositions: Cartesian3.fromDegreesArray([
          -67.655,
          0.0,
          -67.655,
          15.0,
          -67.655,
          20.0,
        ]),
        cornerType: CornerType.BEVELED,
        shapePositions: shape,
        granularity: Math.PI / 6.0,
      })
    );

    expect(m.attributes.position.values.length).toEqual(32 * 3); // 4 positions * 2 for duplication * 4 for shape
    expect(m.indices.length).toEqual(20 * 3); // 2 segments * 8 triangles per segment + 2 * 2 ends
  });

  var positions = [
    new Cartesian3(1.0, 0.0, 0.0),
    new Cartesian3(0.0, 1.0, 0.0),
    new Cartesian3(0.0, 0.0, 1.0),
  ];
  var volumeShape = [
    new Cartesian2(0.0, 0.0),
    new Cartesian2(1.0, 0.0),
    new Cartesian2(0.0, 1.0),
  ];
  var volume = new PolylineVolumeGeometry({
    vertexFormat: VertexFormat.POSITION_ONLY,
    polylinePositions: positions,
    cornerType: CornerType.BEVELED,
    shapePositions: volumeShape,
    ellipsoid: Ellipsoid.UNIT_SPHERE,
    granularity: 0.1,
  });
  var packedInstance = [
    3.0,
    1.0,
    0.0,
    0.0,
    0.0,
    1.0,
    0.0,
    0.0,
    0.0,
    1.0,
    3.0,
    0.0,
    0.0,
    1.0,
    0.0,
    0.0,
    1.0,
    1.0,
    1.0,
    1.0,
    1.0,
    0.0,
    0.0,
    0.0,
    0.0,
    0.0,
    2.0,
    0.1,
  ];
  createPackableSpecs(PolylineVolumeGeometry, volume, packedInstance);
});