public EscherGraphics(HSSFShapeGroup escherGroup, HSSFWorkbook workbook, Color forecolor, float verticalPointsPerPixel ){this.escherGroup = escherGroup;this.workbook = workbook;this.verticalPointsPerPixel = verticalPointsPerPixel;this.verticalPixelsPerPoint = 1 / verticalPointsPerPixel;this.font = new Font("Arial", 0, 10);this.foreground = forecolor;}