Method snapToGrid

graph.js:332–336

( pt )

    }

    snapToGrid( pt ){
        pt.x = Math.round(pt.x * 10) / 10;
        pt.y = Math.round(pt.y * 10) / 10;
        //return { x, y };
    }

    convertScreenToPath( x, y ){
        const xOrg = this.canvas.width * this.config.yAxis;