生成一个箭头轮廓算子
gen_arrow_contour_xld( : Arrow : Row1, Column1, Row2, Column2, HeadLength, HeadWidth : )
该算子一般配合
area_center (region, Area, Row, Column)
orientation_region (region, Phi)
算子使用，生成一个箭头轮廓。
area_center_xld (ObjectSelected, Area1, Ybb, Xbb, PointOrder1)
gen_arrow_contour_xld (Arrow, Ybb, Xbb, minY, Xbb, 12, 12)
concat_obj (MeasureArrows, Arrow, MeasureArrows)
gen_arrow_contour_xld (Arrow, Ybb, Xbb, maxY, Xbb, 12, 12)
concat_obj (MeasureArrows, Arrow, MeasureArrows)
dev_set_color ('green')
dev_display (MeasureArrows)
select_obj (ContCircle, ObjectSelected, IndexM)
area_center_xld (ObjectSelected, Area2, Ybb, Xbb, PointOrder2)