pythonocc进阶学习：分割面/合并面(体)splitter/glue

旧城等待， 2021-11-08 23:08 787阅读 0赞

不同于布尔运算的交并补 ，此处进行的是对已有的图形的快速分割（splitter）以及合并（glue）

### 分割（splitter） ###

*  **1.以边分面**  
    ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80Mjc1NTM4NA_size_16_color_FFFFFF_t_70]

from OCC.Core.BRepBuilderAPI import BRepBuilderAPI_MakeEdge, BRepBuilderAPI_MakeFace
    from OCC.Display.SimpleGui import init_display
    from OCC.Core.GEOMAlgo import GEOMAlgo_Splitter
    from OCC.Core.gp import gp_Dir, gp_Pln, gp_Pnt
    from OCC.Extend.TopologyUtils import TopologyExplorer
    
    display, start_display, add_menu, add_function_to_menu = init_display()
    
    p0 = gp_Pnt()
    vnorm = gp_Dir(1, 0, 0)
    pln = gp_Pln(p0, vnorm)
    face = BRepBuilderAPI_MakeFace(pln, -10, 10, -10, 10).Face()
    p1 = gp_Pnt(0, 0, 15)
    p2 = gp_Pnt(0, 0, -15)
    edge = BRepBuilderAPI_MakeEdge(p1, p2).Edge()
    # 启动分割函数
    splitter = GEOMAlgo_Splitter()
    # 将面作为参数，将边edge作为分割工具。
    splitter.AddArgument(face)
    splitter.AddTool(edge)
    splitter.Perform()
    
    # 显示分割后的面
    for shape in TopologyExplorer(splitter.Shape()).faces():
        display.DisplayShape(shape,update=True)
    
    # 显示使用的工具：边
    display.DisplayShape(edge,update=True)
    start_display()

*  **2.以面分面**  
    ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80Mjc1NTM4NA_size_16_color_FFFFFF_t_70 1]

from OCC.Core.BRepBuilderAPI import  BRepBuilderAPI_MakeFace
    from OCC.Display.OCCViewer import rgb_color
    from OCC.Display.SimpleGui import init_display
    from OCC.Core.GEOMAlgo import GEOMAlgo_Splitter
    from OCC.Core.gp import gp_Dir, gp_Pln, gp_Pnt
    from OCC.Extend.TopologyUtils import TopologyExplorer
    
    display, start_display, add_menu, add_function_to_menu = init_display()
    
    # 第一个面
    p0 = gp_Pnt(5,5,5,)
    vnorm = gp_Dir(1, 1, 1)
    pln = gp_Pln(p0, vnorm)
    face1 = BRepBuilderAPI_MakeFace(pln, -10, 10, -10, 10).Face()
    # 工具面
    p0 = gp_Pnt(5,5,5,)
    vnorm = gp_Dir(1, 1, 0)
    pln = gp_Pln(p0, vnorm)
    face2 = BRepBuilderAPI_MakeFace(pln, -20, 20, -20, 20).Face()
    
    # 启动分割函数
    splitter = GEOMAlgo_Splitter()
    # 将face1作为参数，将面face2作为分割工具。
    splitter.AddArgument(face1)
    splitter.AddTool(face2)
    splitter.Perform()
    
    # 显示分割后的face
    for shape in TopologyExplorer(splitter.Shape()).faces():
        display.DisplayShape(shape,update=True)
    
    # 显示使用的工具：面
    display.DisplayShape(face2,update=True,transparency=0.5,color=rgb_color(1,0.2,0))
    start_display()

*  **3.以面分体**

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80Mjc1NTM4NA_size_16_color_FFFFFF_t_70 2]

from OCC.Core.BRepBuilderAPI import BRepBuilderAPI_MakeEdge, BRepBuilderAPI_MakeFace
    from OCC.Core.BRepPrimAPI import BRepPrimAPI_MakeBox
    from OCC.Display.OCCViewer import rgb_color
    from OCC.Display.SimpleGui import init_display
    from OCC.Core.GEOMAlgo import GEOMAlgo_Splitter
    from OCC.Core.gp import gp_Dir, gp_Pln, gp_Pnt
    from OCC.Extend.TopologyUtils import TopologyExplorer
    
    display, start_display, add_menu, add_function_to_menu = init_display()
    
    p0 = gp_Pnt(5,5,5,)
    vnorm = gp_Dir(1, 1, 1)
    pln = gp_Pln(p0, vnorm)
    face = BRepBuilderAPI_MakeFace(pln, -10, 10, -10, 10).Face()
    
    box=BRepPrimAPI_MakeBox (10,10,10).Shape()
    # 启动分割函数
    splitter = GEOMAlgo_Splitter()
    # 将box作为参数，将面face作为分割工具。
    splitter.AddArgument(box)
    splitter.AddTool(face)
    splitter.Perform()
    
    # 显示分割后的体
    for shape in TopologyExplorer(splitter.Shape()).solids():
        display.DisplayShape(shape,update=True)
    
    # 显示使用的工具：面
    display.DisplayShape(face,update=True,transparency=0.5,color=rgb_color(1,0.2,0))
    start_display()

### 合并（glue） ###

参考链接：  
[https://github.com/tpaviot/pythonocc-demos/blob/master/examples/core\_topology\_glue.py][https_github.com_tpaviot_pythonocc-demos_blob_master_examples_core_topology_glue.py]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80Mjc1NTM4NA_size_16_color_FFFFFF_t_70]: /images/20211108/c4d6de2d3ea74cd68d1f11c9eb76e94a.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80Mjc1NTM4NA_size_16_color_FFFFFF_t_70 1]: /images/20211108/52255ffe67ac44919d0a3207c2e0e567.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80Mjc1NTM4NA_size_16_color_FFFFFF_t_70 2]: /images/20211108/fd79ce5922034b6986065e212e7a768c.png
[https_github.com_tpaviot_pythonocc-demos_blob_master_examples_core_topology_glue.py]: https://github.com/tpaviot/pythonocc-demos/blob/master/examples/core_topology_glue.py