How to use the @antv/matrix-util/lib.mat3.scale function in @antv/matrix-util

public zoom(ratio: number,  center?: Point): void {
    const group: Group = this.get('group')
    let matrix: Matrix = clone(group.getMatrix())
    const minZoom: number = this.get('minZoom')
    const maxZoom: number = this.get('maxZoom')

    if (!matrix) { 
      matrix = mat3.create(); 
    }

    if(center) {
      mat3.translate(matrix, matrix, [ -center.x, -center.y ])
      mat3.scale(matrix, matrix, [ ratio, ratio ])
      mat3.translate(matrix, matrix, [ center.x, center.y ])
    } else {
      mat3.scale(matrix, matrix, [ ratio, ratio ])
    }

    if (minZoom && matrix[0] < minZoom) {
      return;
    }
    if (maxZoom && matrix[0] > maxZoom) {
      return;
    }

    group.setMatrix(matrix);
    this.emit('viewportchange', { action: 'zoom', matrix });
    this.autoPaint();
  }