                        _ctx.xShow = this.value;
                            updateView();
                        }
                    }, {
                        text: 'matrix.y show:',
                        type: 'select',
                        values: [true, false],
                        onchange() {
                            _ctx.yShow = this.value;
                            updateView();
                        }
                    }, {
                        text: 'convertFromPixel opt: