python绘制CAD断面
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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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*************）。
"""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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