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685 lines
22 KiB
JavaScript
685 lines
22 KiB
JavaScript
import ArcType from "./ArcType.js";
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import arrayFill from "./arrayFill.js";
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import BoundingSphere from "./BoundingSphere.js";
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import Check from "./Check.js";
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import ComponentDatatype from "./ComponentDatatype.js";
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import defaultValue from "./defaultValue.js";
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import defined from "./defined.js";
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import DeveloperError from "./DeveloperError.js";
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import Ellipsoid from "./Ellipsoid.js";
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import EllipsoidTangentPlane from "./EllipsoidTangentPlane.js";
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import Geometry from "./Geometry.js";
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import GeometryAttribute from "./GeometryAttribute.js";
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import GeometryAttributes from "./GeometryAttributes.js";
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import GeometryInstance from "./GeometryInstance.js";
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import GeometryOffsetAttribute from "./GeometryOffsetAttribute.js";
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import GeometryPipeline from "./GeometryPipeline.js";
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import IndexDatatype from "./IndexDatatype.js";
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import CesiumMath from "./Math.js";
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import PolygonGeometryLibrary from "./PolygonGeometryLibrary.js";
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import PolygonPipeline from "./PolygonPipeline.js";
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import PrimitiveType from "./PrimitiveType.js";
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import WindingOrder from "./WindingOrder.js";
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var createGeometryFromPositionsPositions = [];
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var createGeometryFromPositionsSubdivided = [];
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function createGeometryFromPositions(
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ellipsoid,
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positions,
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minDistance,
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perPositionHeight,
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arcType
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) {
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var tangentPlane = EllipsoidTangentPlane.fromPoints(positions, ellipsoid);
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var positions2D = tangentPlane.projectPointsOntoPlane(
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positions,
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createGeometryFromPositionsPositions
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);
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var originalWindingOrder = PolygonPipeline.computeWindingOrder2D(positions2D);
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if (originalWindingOrder === WindingOrder.CLOCKWISE) {
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positions2D.reverse();
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positions = positions.slice().reverse();
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}
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var subdividedPositions;
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var i;
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var length = positions.length;
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var index = 0;
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if (!perPositionHeight) {
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var numVertices = 0;
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if (arcType === ArcType.GEODESIC) {
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for (i = 0; i < length; i++) {
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numVertices += PolygonGeometryLibrary.subdivideLineCount(
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positions[i],
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positions[(i + 1) % length],
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minDistance
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);
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}
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} else if (arcType === ArcType.RHUMB) {
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for (i = 0; i < length; i++) {
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numVertices += PolygonGeometryLibrary.subdivideRhumbLineCount(
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ellipsoid,
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positions[i],
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positions[(i + 1) % length],
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minDistance
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);
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}
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}
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subdividedPositions = new Float64Array(numVertices * 3);
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for (i = 0; i < length; i++) {
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var tempPositions;
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if (arcType === ArcType.GEODESIC) {
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tempPositions = PolygonGeometryLibrary.subdivideLine(
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positions[i],
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positions[(i + 1) % length],
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minDistance,
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createGeometryFromPositionsSubdivided
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);
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} else if (arcType === ArcType.RHUMB) {
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tempPositions = PolygonGeometryLibrary.subdivideRhumbLine(
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ellipsoid,
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positions[i],
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positions[(i + 1) % length],
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minDistance,
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createGeometryFromPositionsSubdivided
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);
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}
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var tempPositionsLength = tempPositions.length;
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for (var j = 0; j < tempPositionsLength; ++j) {
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subdividedPositions[index++] = tempPositions[j];
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}
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}
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} else {
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subdividedPositions = new Float64Array(length * 2 * 3);
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for (i = 0; i < length; i++) {
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var p0 = positions[i];
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var p1 = positions[(i + 1) % length];
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subdividedPositions[index++] = p0.x;
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subdividedPositions[index++] = p0.y;
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subdividedPositions[index++] = p0.z;
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subdividedPositions[index++] = p1.x;
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subdividedPositions[index++] = p1.y;
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subdividedPositions[index++] = p1.z;
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}
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}
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length = subdividedPositions.length / 3;
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var indicesSize = length * 2;
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var indices = IndexDatatype.createTypedArray(length, indicesSize);
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index = 0;
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for (i = 0; i < length - 1; i++) {
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indices[index++] = i;
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indices[index++] = i + 1;
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}
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indices[index++] = length - 1;
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indices[index++] = 0;
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return new GeometryInstance({
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geometry: new Geometry({
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attributes: new GeometryAttributes({
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position: new GeometryAttribute({
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componentDatatype: ComponentDatatype.DOUBLE,
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componentsPerAttribute: 3,
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values: subdividedPositions,
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}),
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}),
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indices: indices,
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primitiveType: PrimitiveType.LINES,
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}),
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});
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}
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function createGeometryFromPositionsExtruded(
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ellipsoid,
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positions,
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minDistance,
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perPositionHeight,
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arcType
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) {
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var tangentPlane = EllipsoidTangentPlane.fromPoints(positions, ellipsoid);
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var positions2D = tangentPlane.projectPointsOntoPlane(
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positions,
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createGeometryFromPositionsPositions
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);
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var originalWindingOrder = PolygonPipeline.computeWindingOrder2D(positions2D);
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if (originalWindingOrder === WindingOrder.CLOCKWISE) {
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positions2D.reverse();
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positions = positions.slice().reverse();
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}
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var subdividedPositions;
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var i;
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var length = positions.length;
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var corners = new Array(length);
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var index = 0;
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if (!perPositionHeight) {
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var numVertices = 0;
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if (arcType === ArcType.GEODESIC) {
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for (i = 0; i < length; i++) {
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numVertices += PolygonGeometryLibrary.subdivideLineCount(
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positions[i],
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positions[(i + 1) % length],
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minDistance
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);
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}
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} else if (arcType === ArcType.RHUMB) {
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for (i = 0; i < length; i++) {
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numVertices += PolygonGeometryLibrary.subdivideRhumbLineCount(
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ellipsoid,
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positions[i],
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positions[(i + 1) % length],
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minDistance
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);
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}
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}
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subdividedPositions = new Float64Array(numVertices * 3 * 2);
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for (i = 0; i < length; ++i) {
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corners[i] = index / 3;
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var tempPositions;
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if (arcType === ArcType.GEODESIC) {
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tempPositions = PolygonGeometryLibrary.subdivideLine(
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positions[i],
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positions[(i + 1) % length],
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minDistance,
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createGeometryFromPositionsSubdivided
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);
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} else if (arcType === ArcType.RHUMB) {
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tempPositions = PolygonGeometryLibrary.subdivideRhumbLine(
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ellipsoid,
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positions[i],
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positions[(i + 1) % length],
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minDistance,
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createGeometryFromPositionsSubdivided
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);
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}
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var tempPositionsLength = tempPositions.length;
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for (var j = 0; j < tempPositionsLength; ++j) {
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subdividedPositions[index++] = tempPositions[j];
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}
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}
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} else {
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subdividedPositions = new Float64Array(length * 2 * 3 * 2);
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for (i = 0; i < length; ++i) {
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corners[i] = index / 3;
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var p0 = positions[i];
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var p1 = positions[(i + 1) % length];
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subdividedPositions[index++] = p0.x;
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subdividedPositions[index++] = p0.y;
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subdividedPositions[index++] = p0.z;
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subdividedPositions[index++] = p1.x;
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subdividedPositions[index++] = p1.y;
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subdividedPositions[index++] = p1.z;
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}
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}
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length = subdividedPositions.length / (3 * 2);
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var cornersLength = corners.length;
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var indicesSize = (length * 2 + cornersLength) * 2;
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var indices = IndexDatatype.createTypedArray(
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length + cornersLength,
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indicesSize
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);
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index = 0;
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for (i = 0; i < length; ++i) {
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indices[index++] = i;
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indices[index++] = (i + 1) % length;
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indices[index++] = i + length;
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indices[index++] = ((i + 1) % length) + length;
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}
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for (i = 0; i < cornersLength; i++) {
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var corner = corners[i];
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indices[index++] = corner;
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indices[index++] = corner + length;
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}
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return new GeometryInstance({
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geometry: new Geometry({
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attributes: new GeometryAttributes({
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position: new GeometryAttribute({
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componentDatatype: ComponentDatatype.DOUBLE,
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componentsPerAttribute: 3,
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values: subdividedPositions,
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}),
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}),
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indices: indices,
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primitiveType: PrimitiveType.LINES,
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}),
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});
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}
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/**
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* A description of the outline of a polygon on the ellipsoid. The polygon is defined by a polygon hierarchy.
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*
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* @alias PolygonOutlineGeometry
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* @constructor
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*
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* @param {Object} options Object with the following properties:
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* @param {PolygonHierarchy} options.polygonHierarchy A polygon hierarchy that can include holes.
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* @param {Number} [options.height=0.0] The distance in meters between the polygon and the ellipsoid surface.
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* @param {Number} [options.extrudedHeight] The distance in meters between the polygon's extruded face and the ellipsoid surface.
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* @param {VertexFormat} [options.vertexFormat=VertexFormat.DEFAULT] The vertex attributes to be computed.
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* @param {Ellipsoid} [options.ellipsoid=Ellipsoid.WGS84] The ellipsoid to be used as a reference.
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* @param {Number} [options.granularity=CesiumMath.RADIANS_PER_DEGREE] The distance, in radians, between each latitude and longitude. Determines the number of positions in the buffer.
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* @param {Boolean} [options.perPositionHeight=false] Use the height of options.positions for each position instead of using options.height to determine the height.
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* @param {ArcType} [options.arcType=ArcType.GEODESIC] The type of path the outline must follow. Valid options are {@link ArcType.GEODESIC} and {@link ArcType.RHUMB}.
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*
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* @see PolygonOutlineGeometry#createGeometry
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* @see PolygonOutlineGeometry#fromPositions
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*
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* @example
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* // 1. create a polygon outline from points
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* var polygon = new Cesium.PolygonOutlineGeometry({
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* polygonHierarchy : new Cesium.PolygonHierarchy(
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* Cesium.Cartesian3.fromDegreesArray([
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* -72.0, 40.0,
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* -70.0, 35.0,
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* -75.0, 30.0,
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* -70.0, 30.0,
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* -68.0, 40.0
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* ])
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* )
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* });
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* var geometry = Cesium.PolygonOutlineGeometry.createGeometry(polygon);
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*
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* // 2. create a nested polygon with holes outline
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* var polygonWithHole = new Cesium.PolygonOutlineGeometry({
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* polygonHierarchy : new Cesium.PolygonHierarchy(
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* Cesium.Cartesian3.fromDegreesArray([
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* -109.0, 30.0,
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* -95.0, 30.0,
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* -95.0, 40.0,
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* -109.0, 40.0
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* ]),
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* [new Cesium.PolygonHierarchy(
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* Cesium.Cartesian3.fromDegreesArray([
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* -107.0, 31.0,
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* -107.0, 39.0,
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* -97.0, 39.0,
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* -97.0, 31.0
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* ]),
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* [new Cesium.PolygonHierarchy(
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* Cesium.Cartesian3.fromDegreesArray([
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* -105.0, 33.0,
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* -99.0, 33.0,
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* -99.0, 37.0,
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* -105.0, 37.0
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* ]),
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* [new Cesium.PolygonHierarchy(
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* Cesium.Cartesian3.fromDegreesArray([
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* -103.0, 34.0,
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* -101.0, 34.0,
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* -101.0, 36.0,
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* -103.0, 36.0
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* ])
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* )]
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* )]
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* )]
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* )
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* });
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* var geometry = Cesium.PolygonOutlineGeometry.createGeometry(polygonWithHole);
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*
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* // 3. create extruded polygon outline
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* var extrudedPolygon = new Cesium.PolygonOutlineGeometry({
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* polygonHierarchy : new Cesium.PolygonHierarchy(
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* Cesium.Cartesian3.fromDegreesArray([
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* -72.0, 40.0,
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* -70.0, 35.0,
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* -75.0, 30.0,
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* -70.0, 30.0,
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* -68.0, 40.0
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* ])
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* ),
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* extrudedHeight: 300000
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* });
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* var geometry = Cesium.PolygonOutlineGeometry.createGeometry(extrudedPolygon);
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*/
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function PolygonOutlineGeometry(options) {
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//>>includeStart('debug', pragmas.debug);
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Check.typeOf.object("options", options);
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Check.typeOf.object("options.polygonHierarchy", options.polygonHierarchy);
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if (options.perPositionHeight && defined(options.height)) {
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throw new DeveloperError(
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"Cannot use both options.perPositionHeight and options.height"
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);
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}
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if (
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defined(options.arcType) &&
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options.arcType !== ArcType.GEODESIC &&
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options.arcType !== ArcType.RHUMB
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) {
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throw new DeveloperError(
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"Invalid arcType. Valid options are ArcType.GEODESIC and ArcType.RHUMB."
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);
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}
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//>>includeEnd('debug');
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var polygonHierarchy = options.polygonHierarchy;
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var ellipsoid = defaultValue(options.ellipsoid, Ellipsoid.WGS84);
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var granularity = defaultValue(
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options.granularity,
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CesiumMath.RADIANS_PER_DEGREE
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);
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var perPositionHeight = defaultValue(options.perPositionHeight, false);
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var perPositionHeightExtrude =
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perPositionHeight && defined(options.extrudedHeight);
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var arcType = defaultValue(options.arcType, ArcType.GEODESIC);
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var height = defaultValue(options.height, 0.0);
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var extrudedHeight = defaultValue(options.extrudedHeight, height);
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if (!perPositionHeightExtrude) {
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var h = Math.max(height, extrudedHeight);
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extrudedHeight = Math.min(height, extrudedHeight);
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height = h;
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}
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this._ellipsoid = Ellipsoid.clone(ellipsoid);
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this._granularity = granularity;
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this._height = height;
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this._extrudedHeight = extrudedHeight;
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this._arcType = arcType;
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this._polygonHierarchy = polygonHierarchy;
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this._perPositionHeight = perPositionHeight;
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this._perPositionHeightExtrude = perPositionHeightExtrude;
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this._offsetAttribute = options.offsetAttribute;
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this._workerName = "createPolygonOutlineGeometry";
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/**
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* The number of elements used to pack the object into an array.
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* @type {Number}
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*/
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this.packedLength =
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PolygonGeometryLibrary.computeHierarchyPackedLength(polygonHierarchy) +
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Ellipsoid.packedLength +
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8;
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}
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/**
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* Stores the provided instance into the provided array.
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*
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* @param {PolygonOutlineGeometry} value The value to pack.
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* @param {Number[]} array The array to pack into.
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* @param {Number} [startingIndex=0] The index into the array at which to start packing the elements.
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*
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* @returns {Number[]} The array that was packed into
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*/
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PolygonOutlineGeometry.pack = function (value, array, startingIndex) {
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//>>includeStart('debug', pragmas.debug);
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Check.typeOf.object("value", value);
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Check.defined("array", array);
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//>>includeEnd('debug');
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startingIndex = defaultValue(startingIndex, 0);
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startingIndex = PolygonGeometryLibrary.packPolygonHierarchy(
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value._polygonHierarchy,
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array,
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startingIndex
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);
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Ellipsoid.pack(value._ellipsoid, array, startingIndex);
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startingIndex += Ellipsoid.packedLength;
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array[startingIndex++] = value._height;
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array[startingIndex++] = value._extrudedHeight;
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array[startingIndex++] = value._granularity;
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array[startingIndex++] = value._perPositionHeightExtrude ? 1.0 : 0.0;
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array[startingIndex++] = value._perPositionHeight ? 1.0 : 0.0;
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array[startingIndex++] = value._arcType;
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array[startingIndex++] = defaultValue(value._offsetAttribute, -1);
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array[startingIndex] = value.packedLength;
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return array;
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};
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var scratchEllipsoid = Ellipsoid.clone(Ellipsoid.UNIT_SPHERE);
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var dummyOptions = {
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polygonHierarchy: {},
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};
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/**
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* Retrieves an instance from a packed array.
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*
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* @param {Number[]} array The packed array.
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* @param {Number} [startingIndex=0] The starting index of the element to be unpacked.
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* @param {PolygonOutlineGeometry} [result] The object into which to store the result.
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* @returns {PolygonOutlineGeometry} The modified result parameter or a new PolygonOutlineGeometry instance if one was not provided.
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*/
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PolygonOutlineGeometry.unpack = function (array, startingIndex, result) {
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//>>includeStart('debug', pragmas.debug);
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Check.defined("array", array);
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//>>includeEnd('debug');
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startingIndex = defaultValue(startingIndex, 0);
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var polygonHierarchy = PolygonGeometryLibrary.unpackPolygonHierarchy(
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array,
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startingIndex
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);
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startingIndex = polygonHierarchy.startingIndex;
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delete polygonHierarchy.startingIndex;
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var ellipsoid = Ellipsoid.unpack(array, startingIndex, scratchEllipsoid);
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startingIndex += Ellipsoid.packedLength;
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var height = array[startingIndex++];
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var extrudedHeight = array[startingIndex++];
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var granularity = array[startingIndex++];
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var perPositionHeightExtrude = array[startingIndex++] === 1.0;
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var perPositionHeight = array[startingIndex++] === 1.0;
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var arcType = array[startingIndex++];
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var offsetAttribute = array[startingIndex++];
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var packedLength = array[startingIndex];
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if (!defined(result)) {
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result = new PolygonOutlineGeometry(dummyOptions);
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}
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result._polygonHierarchy = polygonHierarchy;
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result._ellipsoid = Ellipsoid.clone(ellipsoid, result._ellipsoid);
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result._height = height;
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result._extrudedHeight = extrudedHeight;
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result._granularity = granularity;
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result._perPositionHeight = perPositionHeight;
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result._perPositionHeightExtrude = perPositionHeightExtrude;
|
|
result._arcType = arcType;
|
|
result._offsetAttribute =
|
|
offsetAttribute === -1 ? undefined : offsetAttribute;
|
|
result.packedLength = packedLength;
|
|
|
|
return result;
|
|
};
|
|
|
|
/**
|
|
* A description of a polygon outline from an array of positions.
|
|
*
|
|
* @param {Object} options Object with the following properties:
|
|
* @param {Cartesian3[]} options.positions An array of positions that defined the corner points of the polygon.
|
|
* @param {Number} [options.height=0.0] The height of the polygon.
|
|
* @param {Number} [options.extrudedHeight] The height of the polygon extrusion.
|
|
* @param {Ellipsoid} [options.ellipsoid=Ellipsoid.WGS84] The ellipsoid to be used as a reference.
|
|
* @param {Number} [options.granularity=CesiumMath.RADIANS_PER_DEGREE] The distance, in radians, between each latitude and longitude. Determines the number of positions in the buffer.
|
|
* @param {Boolean} [options.perPositionHeight=false] Use the height of options.positions for each position instead of using options.height to determine the height.
|
|
* @param {ArcType} [options.arcType=ArcType.GEODESIC] The type of path the outline must follow. Valid options are {@link LinkType.GEODESIC} and {@link ArcType.RHUMB}.
|
|
* @returns {PolygonOutlineGeometry}
|
|
*
|
|
*
|
|
* @example
|
|
* // create a polygon from points
|
|
* var polygon = Cesium.PolygonOutlineGeometry.fromPositions({
|
|
* positions : Cesium.Cartesian3.fromDegreesArray([
|
|
* -72.0, 40.0,
|
|
* -70.0, 35.0,
|
|
* -75.0, 30.0,
|
|
* -70.0, 30.0,
|
|
* -68.0, 40.0
|
|
* ])
|
|
* });
|
|
* var geometry = Cesium.PolygonOutlineGeometry.createGeometry(polygon);
|
|
*
|
|
* @see PolygonOutlineGeometry#createGeometry
|
|
*/
|
|
PolygonOutlineGeometry.fromPositions = function (options) {
|
|
options = defaultValue(options, defaultValue.EMPTY_OBJECT);
|
|
|
|
//>>includeStart('debug', pragmas.debug);
|
|
Check.defined("options.positions", options.positions);
|
|
//>>includeEnd('debug');
|
|
|
|
var newOptions = {
|
|
polygonHierarchy: {
|
|
positions: options.positions,
|
|
},
|
|
height: options.height,
|
|
extrudedHeight: options.extrudedHeight,
|
|
ellipsoid: options.ellipsoid,
|
|
granularity: options.granularity,
|
|
perPositionHeight: options.perPositionHeight,
|
|
arcType: options.arcType,
|
|
offsetAttribute: options.offsetAttribute,
|
|
};
|
|
return new PolygonOutlineGeometry(newOptions);
|
|
};
|
|
|
|
/**
|
|
* Computes the geometric representation of a polygon outline, including its vertices, indices, and a bounding sphere.
|
|
*
|
|
* @param {PolygonOutlineGeometry} polygonGeometry A description of the polygon outline.
|
|
* @returns {Geometry|undefined} The computed vertices and indices.
|
|
*/
|
|
PolygonOutlineGeometry.createGeometry = function (polygonGeometry) {
|
|
var ellipsoid = polygonGeometry._ellipsoid;
|
|
var granularity = polygonGeometry._granularity;
|
|
var polygonHierarchy = polygonGeometry._polygonHierarchy;
|
|
var perPositionHeight = polygonGeometry._perPositionHeight;
|
|
var arcType = polygonGeometry._arcType;
|
|
|
|
var polygons = PolygonGeometryLibrary.polygonOutlinesFromHierarchy(
|
|
polygonHierarchy,
|
|
!perPositionHeight,
|
|
ellipsoid
|
|
);
|
|
|
|
if (polygons.length === 0) {
|
|
return undefined;
|
|
}
|
|
|
|
var geometryInstance;
|
|
var geometries = [];
|
|
var minDistance = CesiumMath.chordLength(
|
|
granularity,
|
|
ellipsoid.maximumRadius
|
|
);
|
|
|
|
var height = polygonGeometry._height;
|
|
var extrudedHeight = polygonGeometry._extrudedHeight;
|
|
var extrude =
|
|
polygonGeometry._perPositionHeightExtrude ||
|
|
!CesiumMath.equalsEpsilon(height, extrudedHeight, 0, CesiumMath.EPSILON2);
|
|
var offsetValue;
|
|
var i;
|
|
if (extrude) {
|
|
for (i = 0; i < polygons.length; i++) {
|
|
geometryInstance = createGeometryFromPositionsExtruded(
|
|
ellipsoid,
|
|
polygons[i],
|
|
minDistance,
|
|
perPositionHeight,
|
|
arcType
|
|
);
|
|
geometryInstance.geometry = PolygonGeometryLibrary.scaleToGeodeticHeightExtruded(
|
|
geometryInstance.geometry,
|
|
height,
|
|
extrudedHeight,
|
|
ellipsoid,
|
|
perPositionHeight
|
|
);
|
|
if (defined(polygonGeometry._offsetAttribute)) {
|
|
var size =
|
|
geometryInstance.geometry.attributes.position.values.length / 3;
|
|
var offsetAttribute = new Uint8Array(size);
|
|
if (polygonGeometry._offsetAttribute === GeometryOffsetAttribute.TOP) {
|
|
offsetAttribute = arrayFill(offsetAttribute, 1, 0, size / 2);
|
|
} else {
|
|
offsetValue =
|
|
polygonGeometry._offsetAttribute === GeometryOffsetAttribute.NONE
|
|
? 0
|
|
: 1;
|
|
offsetAttribute = arrayFill(offsetAttribute, offsetValue);
|
|
}
|
|
|
|
geometryInstance.geometry.attributes.applyOffset = new GeometryAttribute(
|
|
{
|
|
componentDatatype: ComponentDatatype.UNSIGNED_BYTE,
|
|
componentsPerAttribute: 1,
|
|
values: offsetAttribute,
|
|
}
|
|
);
|
|
}
|
|
geometries.push(geometryInstance);
|
|
}
|
|
} else {
|
|
for (i = 0; i < polygons.length; i++) {
|
|
geometryInstance = createGeometryFromPositions(
|
|
ellipsoid,
|
|
polygons[i],
|
|
minDistance,
|
|
perPositionHeight,
|
|
arcType
|
|
);
|
|
geometryInstance.geometry.attributes.position.values = PolygonPipeline.scaleToGeodeticHeight(
|
|
geometryInstance.geometry.attributes.position.values,
|
|
height,
|
|
ellipsoid,
|
|
!perPositionHeight
|
|
);
|
|
|
|
if (defined(polygonGeometry._offsetAttribute)) {
|
|
var length =
|
|
geometryInstance.geometry.attributes.position.values.length;
|
|
var applyOffset = new Uint8Array(length / 3);
|
|
offsetValue =
|
|
polygonGeometry._offsetAttribute === GeometryOffsetAttribute.NONE
|
|
? 0
|
|
: 1;
|
|
arrayFill(applyOffset, offsetValue);
|
|
geometryInstance.geometry.attributes.applyOffset = new GeometryAttribute(
|
|
{
|
|
componentDatatype: ComponentDatatype.UNSIGNED_BYTE,
|
|
componentsPerAttribute: 1,
|
|
values: applyOffset,
|
|
}
|
|
);
|
|
}
|
|
|
|
geometries.push(geometryInstance);
|
|
}
|
|
}
|
|
|
|
var geometry = GeometryPipeline.combineInstances(geometries)[0];
|
|
var boundingSphere = BoundingSphere.fromVertices(
|
|
geometry.attributes.position.values
|
|
);
|
|
|
|
return new Geometry({
|
|
attributes: geometry.attributes,
|
|
indices: geometry.indices,
|
|
primitiveType: geometry.primitiveType,
|
|
boundingSphere: boundingSphere,
|
|
offsetAttribute: polygonGeometry._offsetAttribute,
|
|
});
|
|
};
|
|
export default PolygonOutlineGeometry;
|