Too high simplification of solution

[romka-chev]

Hello!

I've try to clip some polygons but result is too simplificated. Here is the screenshots:

Original geometry

• Light-yellow is the subj

Solution geometry

• Red polygon is the clip
• Yellow polygon is the intersection
• Blue polygons is the diffs

All of this is result of execution of this code:

var express = require('express');
var Clipper = require('jsclipper/jsclipper-adapter');
var _ = require('lodash');
var router = express.Router();

router.get('/clip', function (req, res) {
    res.header("Access-Control-Allow-Origin", "*");
    res.header("Access-Control-Allow-Headers", "X-Requested-With");

    var reqSubj = req.query['subj'];
    var reqClip = req.query['clip'];

    var result = {
        intersections: [],
        diffs: []
    };

    _.each(reqSubj, function (subject) {
        //region Ensure of array types instead of objects
        var subjShape = _.toArray(subject.slice(0, 1)[0]);
        var subjHoles = _.map(subject.slice(1), function(value){return _.toArray(value)});

        var clipShape = _.toArray(reqClip.slice(0, 1)[0]);
        var clipHoles = _.map(reqClip.slice(1), function(value){return _.toArray(value)});
        //endregion

        var subj = new Clipper.Polygon(subjShape, subjHoles);
        var clip = new Clipper.Polygon(clipShape, clipHoles);

        var intersectSolutions = subj.intersect(clip);
        var diffSolutions = subj.diff(clip);

        _.each(intersectSolutions, function (solution) {
            result.intersections.push(solution.getPaths())
        });
        _.each(diffSolutions, function (solution) {
            result.diffs.push(solution.getPaths())
        });
    });

    res.type('application/json');
    res.send(result);
});

module.exports = router;

So here is the question: how can i reduce or even disable polygons simplifacation?

[romka-chev]

Acuuracy becomse good after I increases this value https://github.com/platener/jsclipper/blob/master/jsclipper-adapter.js#L5

// var DEFAULT_SCALE = Math.pow(10, 3)
var DEFAULT_SCALE = Math.pow(10, 12)

[mischkew]

ah good point! we are working with 3d models in mm-scale in scope of 3d-printing. so a thousandth of a mm is enough precision for us.
do you have a proposal how to make this configurable?

[romka-chev]

I'll make PR for this today