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在Salome中使用python命令流创建curve
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salome可以基于python命令流文件创建curve，参考salome的文档：用tui创建curve
我觉得最精妙的在于，python中可以灵活地采用表达式（analytical）创建曲线。
当然，在gui里面也可以通过analytical建立curve，只不过，在里面写，相当麻烦：link。
样子是这样的，
其中的x(t) equation是可以写关于t的表达式。但是只有短短的一行！简单的sin（t）还可以写。
但是如果碰到像Sajben Diffuser 曲线一样头疼的表达式呢？
图片说明：“Simulation and validation of compressible flow in nozzle geometries and validation of OpenFOAM for this application”。作者Benjamin也是引用了Bogar的文章
Bogar, T. J., Sajben, M., & Kroutil, J. C. 1983. Characteristic Frequencies of Transonic Diffuser Flow Oscillations. AIAA Journal, 21(9), 1232–1240.
用命令流最方便！！！
贴一下相关命令
| 命令流建curve |
| # Creation of a Curve import salome salome.salome_init() import GEOM from salome.geom import geomBuilder geompy = geomBuilder.New(salome.myStudy) gg = salome.ImportComponentGUI("GEOM") # create vertices and vectors p0 = geompy.MakeVertex(0. , 0. , 0. ) p1 = geompy.MakeVertex(50. , 100., 200.) p2 = geompy.MakeVertex(150., 50., 100.) p3 = geompy.MakeVertex(100., 150., 170.) p4 = geompy.MakeVertex(200., 200., 150.) v1 = geompy.MakeVectorDXDYDZ(0, 1, 0) v2 = geompy.MakeVectorDXDYDZ(1, 0, 0) # create a polyline from a list of points polyline = geompy.MakePolyline([p0, p1, p2, p3, p4]) closed_polyline = geompy.MakePolyline([p0, p1, p2, p0]) # create a bezier curve from a list of points bezier = geompy.MakeBezier([p0, p1, p2, p3, p4]) #create a b-spline curve from a list of points interpol = geompy.MakeInterpol([p0, p1, p2, p3, p4], False) #create a b-spline curve with defined directions at the ends interpol_tangents = geompy.MakeInterpolWithTangents([p0, p1, p2, p3, p4], v1, v2) #create a polyline using parametric definition of the basic points param_polyline = geompy.MakeCurveParametric("t", "sin(t)", "cos(t)", 0., 100., 100, GEOM.Polyline, theNewMethod=True) # create a bezier curve using parametric definition of the basic points param_bezier = geompy.MakeCurveParametric("t", "sin(t)", "cos(t)", 0., 100., 20, GEOM.Bezier, theNewMethod=True) #create a b-spline curve using parametric definition of the basic points param_interpol = geompy.MakeCurveParametric("t", "sin(t)", "cos(t)", 0., 100., 100, GEOM.Interpolation, theNewMethod=True) #create a face from closed polyline face = geompy.MakeFace(closed_polyline, True) #create an U-isoline curve isoline = geompy.MakeIsoline(face, True, 0.6) # add objects in the study id_p0 = geompy.addToStudy(p0, "Point1") id_p1 = geompy.addToStudy(p1, "Point2") id_p2 = geompy.addToStudy(p2, "Point3") id_p3 = geompy.addToStudy(p3, "Point4") id_p4 = geompy.addToStudy(p4, "Point5") id_v1 = geompy.addToStudy(v1, "Vector1") id_v2 = geompy.addToStudy(v2, "Vector2") id_polyline = geompy.addToStudy(polyline, "Polyline") id_closed_polyline = geompy.addToStudy(closed_polyline, "Closed Polyline") id_bezier = geompy.addToStudy(bezier, "Bezier") id_interpol = geompy.addToStudy(interpol, "Interpol") id_interpol_tangents = geompy.addToStudy(interpol_tangents, "Interpol Tangents") id_param_polyline = geompy.addToStudy(param_polyline, "Polyline Parametric") id_param_bezier = geompy.addToStudy(param_bezier, "Bezier Parametric") id_param_interpol = geompy.addToStudy(param_interpol, "Interpol Parametric") id_face = geompy.addToStudy(face, "Face") id_isoline = geompy.addToStudy(isoline, "Isoline") # display the points and the curves gg.createAndDisplayGO(id_p0) gg.createAndDisplayGO(id_p1) gg.createAndDisplayGO(id_p2) gg.createAndDisplayGO(id_p3) gg.createAndDisplayGO(id_p4) gg.createAndDisplayGO(id_polyline) gg.createAndDisplayGO(id_closed_polyline) gg.createAndDisplayGO(id_bezier) gg.createAndDisplayGO(id_interpol) gg.createAndDisplayGO(id_interpol_tangents) gg.createAndDisplayGO(id_param_polyline) gg.createAndDisplayGO(id_param_bezier) gg.createAndDisplayGO(id_param_interpol) gg.createAndDisplayGO(id_face) gg.createAndDisplayGO(id_isoline) |
文件下载链接
python命令流里面还可以定义变量值，即上图中的alpha、l、C1、C2、C3、C4等，
参考：link
吐槽一下：这个定义的变量不能直接用于curve。
| 自定义变量 |
| # Using SALOME NoteBook import salome salome.salome_init() import GEOM from salome.geom import geomBuilder geompy = geomBuilder.New(salome.myStudy) import salome_notebook gg = salome.ImportComponentGUI("GEOM") # set variables notebook = salome_notebook.notebook notebook.set("Length", 150) notebook.set("Width", 100) # create box box = geompy.MakeBoxDXDYDZ("Length", "Width", 200) # add object in the study id_box = geompy.addToStudy(box,"Box") # display the boxes gg.createAndDisplayGO(id_box) gg.setDisplayMode(id_box,1) |
文件下载链接
https://wap.sciencenet.cn/blog-531760-993589.html
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