ew() {
                this.ctxOriginal.clearRect(0, 0, this.canvasOriginal.width, this.canvasOriginal.height);
                this.ctxOriginal.save();
                this.ctxOriginal.scale(this.devicePixelRatio, this.devicePixelRatio);
                const colorScheme = { point: 'rgba(59, 130, 246, 0.8)', grid: 'rgba(156, 163, 175,0.7)', surface: 'rgba(29, 78, 216, 0.6)' };
                this._drawControlGrid(this.ctxOriginal, this.mainPatch, colorScheme);
                this._drawBezierSurface(this.