# Loading [MathJax]/jax/output/CommonHTML/fonts/TeX/fontdata.js
import ezdxf
# 创建一个新的DXF文档
doc = ezdxf.new(dxfversion='R2010')
# 添加一个新的图层
doc.layers.new('SQUARE', dxfattribs={'color': 2})
# 获取模型空间
msp = doc.modelspace()
# 创建一个正方形
msp.add_lwpolyline([(0, 0), (10, 0), (10, 10), (0, 10), (0, 0)], dxfattribs={'layer': 'SQUARE'})
# 保存DXF文档
addr = r'd:\data\square.dxf'
doc.saveas(addr)
# 读取DXF文件
doc_1 = ezdxf.readfile(addr)
# python绘图
import ezdxf, matplotlib
import matplotlib.pyplot as plt
matplotlib.use('TkAgg') # 避免Matplotlib版本与其他相关库的兼容性问题
def display_dxf(file_path):
doc = ezdxf.readfile(file_path)
msp = doc.modelspace() # 获取DXF文档的模型空间
fig, ax = plt.subplots()
for entity in msp:
print(entity, type(entity))
if entity.dxftype() == 'LINE':
start_point = entity.dxf.start
end_point = entity.dxf.end
ax.plot([start_point[0], end_point[0]], [start_point[1], end_point[1]], 'b-')
elif entity.dxftype() == 'LWPOLYLINE':
points = list(entity.get_points('xy'))
x, y = zip(*points)
ax.plot(x, y, 'r-')
elif entity.dxftype() == 'CIRCLE':
center = entity.dxf.center
radius = entity.dxf.radius
circle = plt.Circle(center, radius, color='g', fill=False)
ax.add_patch(circle)
elif entity.dxftype() == 'TEXT':
insertion_point = entity.dxf.insert
text = entity.dxf.text
ax.text(insertion_point[0], insertion_point[1], text, fontsize=8)
elif entity.dxftype() == 'SOLID':
vtx0 = entity.dxf.vtx0
vtx1 = entity.dxf.vtx1
vtx2 = entity.dxf.vtx2
vtx3 = entity.dxf.vtx3
vertices = [(vtx0.x, vtx0.y), (vtx1.x, vtx1.y), (vtx2.x, vtx2.y), (vtx3.x, vtx3.y)]
vertices_list = []
for vertice in vertices:
vertices_list.append([round(vertice[0], 1), round(vertice[1], 1)])
polygon = plt.Polygon(xy=vertices_list, color='gray', alpha=0.8)
ax.add_patch(polygon)
ax.set_aspect('equal', adjustable='box')
plt.xlabel('X')
plt.ylabel('Y')
plt.title('DXF Display')
plt.grid(True)
plt.show()
if __name__ == "__main__":
file_path = addr
display_dxf(file_path)
LWPOLYLINE(#30) <class 'ezdxf.entities.lwpolyline.LWPolyline'>
在Python中，你可以使用ezdxf库来创建和修改DXF文件，这是一种与AutoCAD兼容的绘图数据文件¹。然后，你可以使用AutoCAD或其他支持DXF格式的软件打开该文件查看绘制的图形¹。
此外，你还可以使用matplotlib库来显示AutoCAD导出的.dxf格式文件²。以下是一个示例代码，它读取一个DXF文件，并使用matplotlib显示其中的实体（线、多线段、圆、文本和实体）²:
```python
import ezdxf, matplotlib
import matplotlib.pyplot as plt
matplotlib.use('TkAgg') # 避免Matplotlib版本与其他相关库的兼容性问题
def display_dxf(file_path):
doc = ezdxf.readfile(file_path)
msp = doc.modelspace() # 获取DXF文档的模型空间
fig, ax = plt.subplots()
for entity in msp:
print(entity, type(entity))
if entity.dxftype() == 'LINE':
start_point = entity.dxf.start
end_point = entity.dxf.end
ax.plot([start_point[0], end_point[0]], [start_point[1], end_point[1]], 'b-')
elif entity.dxftype() == 'LWPOLYLINE':
points = list(entity.get_points('xy'))
x, y = zip(*points)
ax.plot(x, y, 'r-')
elif entity.dxftype() == 'CIRCLE':
center = entity.dxf.center
radius = entity.dxf.radius
circle = plt.Circle(center, radius, color='g', fill=False)
ax.add_patch(circle)
elif entity.dxftype() == 'TEXT':
insertion_point = entity.dxf.insert
text = entity.dxf.text
ax.text(insertion_point[0], insertion_point[1], text, fontsize=8)
elif entity.dxftype() == 'SOLID':
vtx0 = entity.dxf.vtx0
vtx1 = entity.dxf.vtx1
vtx2 = entity.dxf.vtx2
vtx3 = entity.dxf.vtx3
vertices = [(vtx0.x, vtx0.y), (vtx1.x, vtx1.y), (vtx2.x, vtx2.y), (vtx3.x, vtx3.y)]
vertices_list = []
for vertice in vertices:
vertices_list.append([round(vertice[0], 1), round(vertice[1], 1)])
polygon = plt.Polygon(xy=vertices_list, color='gray', alpha=0.8)
ax.add_patch(polygon)
ax.set_aspect('equal', adjustable='box')
plt.xlabel('X')
plt.ylabel('Y')
plt.title('DXF Display')
plt.grid(True)
plt.show()
if __name__ == "__main__":
file_path = "files/Main board2007.dxf"
display_dxf(file_path)
```
这段代码首先读取一个DXF文件，并获取其模型空间。然后，它遍历模型空间中的每个实体，并根据实体类型（线、多线段、圆、文本或实体）在matplotlib图中绘制相应的图形²。最后，它显示了包含所有绘制图形的matplotlib图²。
请注意，这只是一个基本示例，你可能需要根据你的具体需求对其进行修改²。希望这对你有所帮助！
源: 与必应的对话， 2023/10/19
(1) 基于python对autocad进行二次开发，有没有合适的教材？ - 知乎. https://www.zhihu.com/question/456169830.
(2) 【Python ezdxf+matplotlib】显示AutoCAD导出的.dxf格式文件. https://blog.csdn.net/ChaoChao66666/article/details/132146326.
(3) 使用Python操作CAD的dxf文件，批量绘制变形图的方法记录-CSDN博客. https://blog.csdn.net/Paaooon/article/details/106651723.
(4) 使用Python读写DXF和DWG文件 · 大专栏. https://www.dazhuanlan.com/hustkiwi/topics/1167820.
