python快速绘制cad断面图

python绘制CAD断面

引用的python第三方库

pyautocad模块,官方文档讲解的并不多，最主要部分是连接CAD软件的讲解，示例代码极少。pyautocad是依赖于cad运行的第三方库。意味着运行代码运行时CAD必须处打开状态，否则程序就会BUG.

pyautocad 库由俄罗斯工程师 Roman Haritonov 开发，用于简化使用 Python 语言书写 AutoCAD ActiveX Automation 脚本。主要参考资料如下：

• PiPy： pyautocad 0.2.0 。

• GitHub： reclosedev/pyautocad 。

• Documentation： pyautocad’s documentation 。

math模块，python内置的标准库。主要提供了很多关于数学方面的函数。

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绘制断面需要什么数据

          1.从CASS提取所需的高程点           2.其他数据整理代码都可以实现，只需要填入相应的参数,处理完成后可以得到一个二维数组（第一点到个点之间的距离，高程*************）。

代码实现

"""主函数""" import Data_collation import Art_CAD def main(): pass # 自已调用相应的功能 if __name__ == "__main__": main() """数据分析模块""" import math def Read_Data(): """ 排序，把点从河流的上游到下游，从左到右的方式进行排序 原理主要根据X或Y的坐标大小进行分析 :return: 返回正确排序的高程点 """ datas_list = [] x_y = input("请输入需要按X轴或Y轴排序（输入其他字符则按Y轴处理）:") x_y = x_y.upper() # 将输入字母变为大写 if x_y == "X": x_y = 2 else: x_y = 1 with open(r"C:\Users\n\Desktop\test\lxh.txt", "r", encoding="utf-8")as f: datas = f.readlines() for data in datas: data = data.strip("\n") data = data.split(",") data[2] = float(data[2]) data[3] = float(data[3]) data = tuple(data) datas_list.append(data) T_F = input("请输入排序方式：T或F") T_F = T_F.upper() if T_F == "T": new_datas_list = sorted(datas_list, key=lambda xy: xy[x_y], reverse=False) # 排序函数 else: new_datas_list = sorted(datas_list, key=lambda xy: xy[x_y], reverse=True) return new_datas_list # 将正确高程点数据返回给主函数main（） def Calc_Distance(distance_datas): """ 计算各点与第一点的距离 :param distance_datas: x，y的原始坐标 :return: None """ y1, x1 = distance_datas[0][2], distance_datas[0][3] for xy in distance_datas: y, x = xy[2], xy[3] distance = round(math.sqrt((x1 - x) ** 2 + (y - y1) ** 2), 2) # 计算两点之间的距离公式 with open(r"C:\Users\n\Desktop\test\S6666.txt", "a")as f: f.write("%s,%s,%s,%s\n" % (xy[0], distance, xy[4], xy[1])) # 第四个是注记 """绘图模块""" """ 图层函数暂时还没有内容，断面图的整体框架已经出来了。 """ from pyautocad import Autocad, aDouble, APoint # 连接运行的cad程序，如果cad没有再运行则会自动运行并打开一个新的文件 pyacad = Autocad(create_if_not_exists=True) # pyacad.prompt("连接CAD成功") height_list = [] # 只含高程数据的列表 def Read_Starandtxt(): """ 读取标准的断面数据文件*.dat :return: 含高程点数据的列表 """ with open(r"C:\Users\n\Desktop\test\aa.txt", "r")as f: point_data = f.readlines() for height_datas in point_data: height_datas = height_datas.strip("\n") height_datas = height_datas.split(",") height_list.append(float(height_datas[2])) # 把高程数据增添进列表 return point_data def Handle1(textString, Height, Distance): """ 辅助注记函数，具体请可以参考pyautocad文档 :param textString: 注记的文集信息 :param Height: 高程 :param Distance: 距离 :return: """ insertPnt = APoint(0, 0) height = 2.5 textObj = pyacad.model.AddText(textString, insertPnt, height) AlignNum = 13 textObj.Alignment = AlignNum insertPnt = APoint(Distance, Height) textObj.TextAlignmentPoint = insertPnt BasePoint = insertPnt textObj.ScaleEntity(BasePoint, 0.2) def Point_And_Line(): """ 画断面线和点 :return: 没有返回值 """ Point_List = [] # 点坐标数据 datas = Read_Starandtxt() # 调用读取标准断面数据函数 for point in datas: point = point.strip("\n") point = point.split(",") distance, height = float(point[1]), float(point[2]) pyacad.ActiveDocument.SendCommand( "point" + chr(13) + "{}".format(distance) + "," + "{}".format(height) + chr(13)) # 发送"point"命令给cad画点 Point_List.append(distance) # 距离Y Point_List.append(height) # 高程X Point_List.append(0) # 可以为任何数字 Point_List = aDouble(Point_List) # 转换数据类型然后画复合线 pyacad.model.AddPolyLine(Point_List) def Notes(): """ 注记信息（距离，高程，代码） :return: 没有返回值 """ datas = Read_Starandtxt() for point in datas: point = point.strip("\n") point = point.split(",") textString = point[3] Distance = float(point[1]) Height = float(point[2]) Handle1(textString, Height - 0.8, Distance) Handle1(Height, Height, Distance) Handle1(Distance, Height + 0.8, Distance) def Outer_Frame(): """ 画断面图的外围方框 :return: 没有返回值 """ max_height = max(height_list) # 高程的最大值和最小值 min_heighe = min(height_list) point1 = [0, min_heighe - 3, 0] point2 = [0, max_height + 73, 0] point4 = [300, max_height + 73, 0] point3 = [300, min_heighe - 3, 0] point5 = [150, max_height + 73, 0] point6 = [150, min_heighe - 3, 0] frame_line = point1 + point2 + point4 + point3 + point1 center_line = point5 + point6 frame_line = aDouble(frame_line) pyacad.model.AddPolyLine(frame_line) center_line = aDouble(center_line) pyacad.model.AddPolyLine(center_line) def Ruler(): """ 画高程标尺 :return: 没有返回值 """ max_height = max(height_list) min_heighe = min(height_list) line_start = (30, min_heighe - 3, 0, 31.5, min_heighe - 3, 0) line_end = (30, max_height + 3, 0, 31.5, max_height + 3, 0) line_start = aDouble(line_start) pyacad.model.AddPolyLine(line_start) line_end = aDouble(line_end) pyacad.model.AddPolyLine(line_end) longitudinal_line = (30, min_heighe - 3, 0, 30, max_height + 3, 0) longitudinal_line = aDouble(longitudinal_line) pyacad.model.AddPolyLine(longitudinal_line) TwoLine_to_point = int(min_heighe - 2) while True: line = (30, TwoLine_to_point, 0, 30.8, TwoLine_to_point, 0) line = aDouble(line) pyacad.model.AddPolyLine(line) insertPnt = APoint(30.8, TwoLine_to_point - 0.2) height = 2.5 textObj = pyacad.model.AddText(TwoLine_to_point, insertPnt, height) BasePoint = insertPnt textObj.ScaleEntity(BasePoint, 0.2) TwoLine_to_point += 1 if TwoLine_to_point >= max_height + 3: break def water_line(): """ 画水压线 :return: 没有返回值 """ water_line_xy = [] datas = Read_Starandtxt() for point in datas: point = point.strip("\n") point = point.split(",") if point[3] == "水边": water_line_xy.append(float(point[1])) water_line_xy.append(float(point[2])) water_line_xy.append(0) midpoint = (water_line_xy[0] + water_line_xy[3]) / 2 height = water_line_xy[1] water_line_xy = aDouble(water_line_xy) pyacad.model.AddPolyLine(water_line_xy) Handle1("2020年12月8日", height, midpoint) # 图层 def Layer(): """ 增添图层，指定样式，美化断面图。 :return: """ pass

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