38 lines
1.2 KiB
JavaScript
38 lines
1.2 KiB
JavaScript
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"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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const three_1 = require("three");
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/**
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* 点选
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*
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* @export
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* @param {Viewer} view
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* @param {number} ptx
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* @param {number} pty
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* @returns {(Mesh | undefined)}
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*/
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function PointPick(view, ptx, pty) {
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let raycaster = new three_1.Raycaster();
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raycaster.setFromCamera({
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x: (ptx / view._Width) * 2 - 1,
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y: -(pty / view._Height) * 2 + 1 //y轴相反
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}, view.m_Camera.Camera);
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//https://github.com/mrdoob/three.js/issues/14128
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raycaster.ray.origin.set((ptx / view._Width) * 2 - 1, -(pty / view._Height) * 2 + 1, -1).unproject(view.m_Camera.Camera);
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let minDis = Infinity;
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let minObj = undefined;
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view.m_Scene.children.forEach(obj => {
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if (obj instanceof three_1.Mesh) {
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let intersects = [];
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obj.raycast(raycaster, intersects);
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for (let i of intersects) {
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if (i.distance < minDis) {
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minObj = obj;
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minDis = i.distance;
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}
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}
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}
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});
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return minObj;
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}
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exports.PointPick = PointPick;
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//# sourceMappingURL=PointPick.js.map
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