import Cartesian2 from './Cartesian2.js';
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import Cartesian3 from './Cartesian3.js';
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import Check from './Check.js';
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import Matrix3 from './Matrix3.js';
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import OrientedBoundingBox from './OrientedBoundingBox.js';
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/**
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* @private
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*/
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var CoplanarPolygonGeometryLibrary = {};
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var scratchIntersectionPoint = new Cartesian3();
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var scratchXAxis = new Cartesian3();
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var scratchYAxis = new Cartesian3();
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var scratchZAxis = new Cartesian3();
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var obbScratch = new OrientedBoundingBox();
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CoplanarPolygonGeometryLibrary.validOutline = function(positions) {
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//>>includeStart('debug', pragmas.debug);
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Check.defined('positions', positions);
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//>>includeEnd('debug');
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var orientedBoundingBox = OrientedBoundingBox.fromPoints(positions, obbScratch);
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var halfAxes = orientedBoundingBox.halfAxes;
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var xAxis = Matrix3.getColumn(halfAxes, 0, scratchXAxis);
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var yAxis = Matrix3.getColumn(halfAxes, 1, scratchYAxis);
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var zAxis = Matrix3.getColumn(halfAxes, 2, scratchZAxis);
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var xMag = Cartesian3.magnitude(xAxis);
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var yMag = Cartesian3.magnitude(yAxis);
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var zMag = Cartesian3.magnitude(zAxis);
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// If all the points are on a line return undefined because we can't draw a polygon
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return !((xMag === 0 && (yMag === 0 || zMag === 0)) || (yMag === 0 && zMag === 0));
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};
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// call after removeDuplicates
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CoplanarPolygonGeometryLibrary.computeProjectTo2DArguments = function(positions, centerResult, planeAxis1Result, planeAxis2Result) {
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//>>includeStart('debug', pragmas.debug);
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Check.defined('positions', positions);
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Check.defined('centerResult', centerResult);
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Check.defined('planeAxis1Result', planeAxis1Result);
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Check.defined('planeAxis2Result', planeAxis2Result);
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//>>includeEnd('debug');
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var orientedBoundingBox = OrientedBoundingBox.fromPoints(positions, obbScratch);
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var halfAxes = orientedBoundingBox.halfAxes;
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var xAxis = Matrix3.getColumn(halfAxes, 0, scratchXAxis);
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var yAxis = Matrix3.getColumn(halfAxes, 1, scratchYAxis);
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var zAxis = Matrix3.getColumn(halfAxes, 2, scratchZAxis);
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var xMag = Cartesian3.magnitude(xAxis);
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var yMag = Cartesian3.magnitude(yAxis);
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var zMag = Cartesian3.magnitude(zAxis);
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var min = Math.min(xMag, yMag, zMag);
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// If all the points are on a line return undefined because we can't draw a polygon
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if ((xMag === 0 && (yMag === 0 || zMag === 0)) || (yMag === 0 && zMag === 0)) {
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return false;
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}
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var planeAxis1;
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var planeAxis2;
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if (min === yMag || min === zMag) {
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planeAxis1 = xAxis;
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}
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if (min === xMag) {
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planeAxis1 = yAxis;
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} else if (min === zMag) {
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planeAxis2 = yAxis;
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}
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if (min === xMag || min === yMag) {
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planeAxis2 = zAxis;
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}
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Cartesian3.normalize(planeAxis1, planeAxis1Result);
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Cartesian3.normalize(planeAxis2, planeAxis2Result);
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Cartesian3.clone(orientedBoundingBox.center, centerResult);
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return true;
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};
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function projectTo2D(position, center, axis1, axis2, result) {
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var v = Cartesian3.subtract(position, center, scratchIntersectionPoint);
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var x = Cartesian3.dot(axis1, v);
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var y = Cartesian3.dot(axis2, v);
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return Cartesian2.fromElements(x, y, result);
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}
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CoplanarPolygonGeometryLibrary.createProjectPointsTo2DFunction = function(center, axis1, axis2) {
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return function(positions) {
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var positionResults = new Array(positions.length);
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for (var i = 0; i < positions.length; i++) {
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positionResults[i] = projectTo2D(positions[i], center, axis1, axis2);
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}
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return positionResults;
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};
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};
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CoplanarPolygonGeometryLibrary.createProjectPointTo2DFunction = function(center, axis1, axis2) {
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return function(position, result) {
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return projectTo2D(position, center, axis1, axis2, result);
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};
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};
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export default CoplanarPolygonGeometryLibrary;
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