最近涉及到需要读取stp\igs\stl等文件,则需要借助pythonocc,需要完成一个曲线按照某矢量投影到实体上产生新曲线的功能。
由于对pythonocc一点不熟悉,网上查了一些文档,但是似乎已经是过时的demo,API接口对不上。代码如下,请帮忙分析一下:
from OCC.Core.gp import gp_Dir, gp_Pnt
from OCC.Core.BRepPrimAPI import BRepPrimAPI_MakeCylinder
from OCC.Core.BRepProj import BRepProj_Projection
from OCC.Core.TopoDS import TopoDS_Shape
from OCC.Core.TopExp import TopExp_Explorer
from OCC.Core.TopAbs import TopAbs_VERTEX
from OCC.Core.TopLoc import TopLoc_Location
# 创建一个圆柱体作为示例实体
cylinder = BRepPrimAPI_MakeCylinder(50, 100).Shape()
# 创建一个示例曲线(在圆柱体平面上的曲线)
points = [gp_Pnt(0, 0, 150), gp_Pnt(50, 50, 150), gp_Pnt(100, 0, 150)]
curve = BRepBuilderAPI_MakePolygon()
for point in points:
curve.Add(point)
curve.Build()
# 创建投影方向
direction = gp_Dir(0, 0, -1)
# 创建投影对象
projector = BRepProj_Projection(curve.Wire(), cylinder, direction)
# 执行投影
projector.Perform()
# 获取投影结果
if projector.IsDone():
projection = projector.ProjectedShape()
explorer = TopExp_Explorer(projection, TopAbs_VERTEX)
# 导出点坐标
points = []
while explorer.More():
vertex = TopoDS.vertex(explorer.Current())
loc = vertex.Location()
point = loc.Transformation().TranslationPart()
points.append((point.X(), point.Y(), point.Z()))
explorer.Next()
# 打印所有点坐标
for point in points:
print(f'坐标:({point[0]}, {point[1]}, {point[2]})')
如上的代码,一些接口已经不存在了,请有在行的朋友修改一下吧!