awv3/plugins/sketcher/viewutils.js

⚡ AWV3 embedded CAD

'use strict';

Object.defineProperty(exports, "__esModule", {
    value: true
});
exports.calcSketchPos = calcSketchPos;
exports.calcWorldToPixelScale = calcWorldToPixelScale;

var _three = require('three');

var THREE = _interopRequireWildcard(_three);

function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) newObj[key] = obj[key]; } } newObj.default = obj; return newObj; } }

function calcSketchPos(ray, sketch) {
    //transform line from world to sketch coords
    var worldToLocal = new THREE.Matrix4().getInverse(sketch.getMatrixWorld());
    ray.applyMatrix4(worldToLocal);
    //calculate intersection of line with z = 0 plane
    var param = (0 - ray.origin.z) / ray.direction.z;
    var sketchPoint = ray.at(param);
    sketchPoint.z = 0; //ensure it is exactly zero
    return sketchPoint;
}

function calcWorldToPixelScale(view, pos) {
    var dirs = [[1, 0], [0, 1], [-1, 0], [0, -1]];
    var step = 1e-3;

    var toScreen = function toScreen(pos) {
        return view.getPoint2(pos.clone());
    };

    var maxCoeff = 1e-3;
    var posScr = toScreen(pos);
    for (var i = 0; i < dirs.length; i++) {
        var mutPos = new THREE.Vector3(dirs[i][0], dirs[i][1], 0).multiplyScalar(step).add(pos);
        var mutPosScr = toScreen(mutPos);
        var coeff = mutPosScr.distanceTo(posScr) / step;
        maxCoeff = Math.max(maxCoeff, coeff);
    }

    return maxCoeff;
}