CADViewComponent/dist/PointPick.js

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
var three_1 = require("three");
/**
 * 点选
 *
 * @export
 * @param {Viewer} view
 * @param {number} ptx
 * @param {number} pty
 * @returns {(Mesh | undefined)}
 */
function PointPick(view, ptx, pty) {
    var raycaster = new three_1.Raycaster();
    raycaster.setFromCamera({
        x: (ptx / view._Width) * 2 - 1,
        y: -(pty / view._Height) * 2 + 1 //y轴相反
    }, view.m_Camera.Camera);
    //https://github.com/mrdoob/three.js/issues/14128
    raycaster.ray.origin.set((ptx / view._Width) * 2 - 1, -(pty / view._Height) * 2 + 1, -1).unproject(view.m_Camera.Camera);
    var minDis = Infinity;
    var minObj = undefined;
    view.m_Scene.children.forEach(function (obj) {
        if (obj instanceof three_1.Mesh) {
            var intersects = [];
            obj.raycast(raycaster, intersects);
            for (var _i = 0, intersects_1 = intersects; _i < intersects_1.length; _i++) {
                var i = intersects_1[_i];
                if (i.distance < minDis) {
                    minObj = obj;
                    minDis = i.distance;
                }
            }
        }
    });
    return minObj;
}
exports.PointPick = PointPick;
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