mirror of
https://github.com/NGSolve/netgen.git
synced 2024-11-11 16:49:16 +05:00
add functionality to draw occ shapes with webgui
This commit is contained in:
Matthias Hochsteger
parent
a7f836cb9a
commit
ae6b23fffc
@ -56,6 +56,35 @@
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using namespace netgen;
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void ExtractFaceData( const TopoDS_Face & face, int index, std::vector<double> * p, Box<3> & box )
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{
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Handle(Geom_Surface) surf = BRep_Tool::Surface (face);
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TopLoc_Location loc;
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Handle(Poly_Triangulation) triangulation = BRep_Tool::Triangulation (face, loc);
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bool flip = TopAbs_REVERSED == face.Orientation();
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int ntriangles = triangulation -> NbTriangles();
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for (int j = 1; j <= ntriangles; j++)
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{
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Poly_Triangle triangle = (triangulation -> Triangles())(j);
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std::array<Point<3>,3> pts;
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for (int k = 0; k < 3; k++)
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pts[k] = occ2ng( (triangulation -> Nodes())(triangle(k+1)).Transformed(loc) );
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if(flip)
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Swap(pts[1], pts[2]);
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for (int k = 0; k < 3; k++)
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{
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box.Add(pts[k]);
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for (int d = 0; d < 3; d++)
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p[k].push_back( pts[k][d] );
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p[k].push_back( index );
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}
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}
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}
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py::object CastShape(const TopoDS_Shape & s)
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{
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@ -543,6 +572,74 @@ DLL_HEADER void ExportNgOCCShapes(py::module &m)
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// return MoveToNumpyArray(triangles);
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return triangles;
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})
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.def("_webgui_data", [](const TopoDS_Shape & shape)
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{
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BRepTools::Clean (shape);
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double deflection = 0.01;
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BRepMesh_IncrementalMesh (shape, deflection, true);
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// triangulation = BRep_Tool::Triangulation (face, loc);
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std::vector<double> p[3];
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py::list names, colors;
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int index = 0;
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Box<3> box(Box<3>::EMPTY_BOX);
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for (TopExp_Explorer e(shape, TopAbs_FACE); e.More(); e.Next())
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{
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TopoDS_Face face = TopoDS::Face(e.Current());
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// Handle(TopoDS_Face) face = e.Current();
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ExtractFaceData(face, index, p, box);
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auto & props = OCCGeometry::global_shape_properties[face.TShape()];
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if(props.col)
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{
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auto & c = *props.col;
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colors.append(py::make_tuple(c[0], c[1], c[2]));
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}
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else
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colors.append(py::make_tuple(0.0, 1.0, 0.0));
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if(props.name)
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{
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names.append(*props.name);
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}
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else
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names.append("");
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index++;
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}
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auto center = box.Center();
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py::list mesh_center;
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mesh_center.append(center[0]);
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mesh_center.append(center[1]);
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mesh_center.append(center[2]);
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py::dict data;
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data["ngsolve_version"] = "Netgen x.x"; // TODO
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data["mesh_dim"] = 3; // TODO
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data["mesh_center"] = mesh_center;
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data["mesh_radius"] = box.Diam()/2;
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data["order2d"] = 1;
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data["order3d"] = 0;
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data["draw_vol"] = false;
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data["draw_surf"] = true;
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data["funcdim"] = 0;
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data["show_wireframe"] = false;
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data["show_mesh"] = true;
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data["edges"] = py::list{};
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data["Bezier_points"] = py::list{};
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py::list points;
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points.append(p[0]);
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points.append(p[1]);
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points.append(p[2]);
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data["Bezier_trig_points"] = points;
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data["funcmin"] = 0;
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data["funcmax"] = 1;
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data["mesh_regions_2d"] = index;
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data["autoscale"] = false;
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data["colors"] = colors;
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data["names"] = names;
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return data;
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})
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;
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py::class_<TopoDS_Vertex, TopoDS_Shape> (m, "TopoDS_Vertex")
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@ -3,6 +3,7 @@ configure_file(__init__.py ${CMAKE_CURRENT_BINARY_DIR}/__init__.py @ONLY)
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install(FILES
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${CMAKE_CURRENT_BINARY_DIR}/__init__.py
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meshing.py csg.py geom2d.py stl.py gui.py NgOCC.py occ.py read_gmsh.py
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webgui.py
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DESTINATION ${NG_INSTALL_DIR_PYTHON}/${NG_INSTALL_SUFFIX}
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COMPONENT netgen
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)
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247
python/webgui.py
Normal file
247
python/webgui.py
Normal file
@ -0,0 +1,247 @@
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import math
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import numpy as np
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from time import time
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import os
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from webgui_jupyter_widgets import BaseWebGuiScene, encodeData, WebGuiDocuWidget
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import webgui_jupyter_widgets.widget as wg
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class WebGLScene(BaseWebGuiScene):
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def __init__(self, mesh, clipping, on_init):
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from IPython.display import display, Javascript
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import threading
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self.mesh = mesh
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self.clipping = clipping
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self.on_init = on_init
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def GetData(self, set_minmax=True):
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import json
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# d = BuildRenderData(self.mesh, self.cf, self.order, draw_surf=self.draw_surf, draw_vol=self.draw_vol, deformation=self.deformation, region=self.region)
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d = self.mesh._webgui_data()
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bp = d['Bezier_trig_points']
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for i in range(len(bp)):
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bp[i] = encodeData(np.array(bp[i]))
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if self.clipping is not None:
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d['clipping'] = True
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if isinstance(self.clipping, dict):
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allowed_args = ("x", "y", "z", "dist", "function", "pnt", "vec")
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if "vec" in self.clipping:
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vec = self.clipping["vec"]
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self.clipping["x"] = vec[0]
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self.clipping["y"] = vec[1]
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self.clipping["z"] = vec[2]
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if "pnt" in self.clipping:
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d['mesh_center'] = list(self.clipping["pnt"])
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for name, val in self.clipping.items():
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if not (name in allowed_args):
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raise Exception('Only {} allowed as arguments for clipping!'.format(", ".join(allowed_args)))
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d['clipping_' + name] = val
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if self.on_init:
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d['on_init'] = self.on_init
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return d
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bezier_trig_trafos = { } # cache trafos for different orders
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def BuildRenderData(mesh, func, order=2, draw_surf=True, draw_vol=True, deformation=None, region=True):
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d = {}
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d['ngsolve_version'] = "Netgen"
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d['mesh_dim'] = 3 # mesh.dim TODO
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d['order2d'] = 1
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d['order3d'] = 0
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d['draw_vol'] = False
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d['draw_surf'] = True
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d['funcdim'] = 1
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func2 = None
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if func and func.is_complex:
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d['is_complex'] = True
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func1 = func[0].real
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func2 = ngs.CoefficientFunction( (func[0].imag, 0.0) )
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elif func and func.dim>1:
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func1 = func[0]
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func2 = ngs.CoefficientFunction( tuple(func[i] if i<func.dim else 0.0 for i in range(1,3)) ) # max 3-dimensional functions
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d['funcdim'] = func.dim
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elif func:
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func1 = func
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d['funcdim'] = 1
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else:
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# no function at all -> we are just drawing a mesh, eval mesh element index instead
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mats = mesh.GetMaterials()
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bnds = mesh.GetBoundaries()
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nmats = len(mesh.GetMaterials())
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nbnds = len(mesh.GetBoundaries())
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n = max(nmats, nbnds)
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func1 = ngs.CoefficientFunction(list(range(n)))
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n_regions = [0, 0, nmats, nbnds]
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d['mesh_regions_2d'] = n_regions[mesh.dim]
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d['mesh_regions_3d'] = nmats if mesh.dim==3 else 0
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d['funcdim'] = 0
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func1 = ngs.CoefficientFunction( (ngs.x, ngs.y, ngs.z, func1 ) )
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func0 = ngs.CoefficientFunction( (ngs.x, ngs.y, ngs.z, 0.0 ) )
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if deformation is not None:
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func1 += ngs.CoefficientFunction((deformation, 0.0))
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func0 += ngs.CoefficientFunction((deformation, 0.0))
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d['show_wireframe'] = False
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d['show_mesh'] = True
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if order2d>0:
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og = order2d
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d['show_wireframe'] = True
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d['show_mesh'] = True
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timer2.Start()
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timer3Bvals.Start()
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# transform point-values to Bernsteinbasis
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def Binomial(n,i): return math.factorial(n) / math.factorial(i) / math.factorial(n-i)
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def Bernstein(x, i, n): return Binomial(n,i) * x**i*(1-x)**(n-i)
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Bvals = ngs.Matrix(og+1,og+1)
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for i in range(og+1):
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for j in range(og+1):
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Bvals[i,j] = Bernstein(i/og, j, og)
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iBvals = Bvals.I
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timer3Bvals.Stop()
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# print (Bvals)
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# print (iBvals)
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Bezier_points = []
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ipts = [(i/og,0) for i in range(og+1)] + [(0, i/og) for i in range(og+1)] + [(i/og,1.0-i/og) for i in range(og+1)]
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ir_trig = ngs.IntegrationRule(ipts, [0,]*len(ipts))
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ipts = [(i/og,0) for i in range(og+1)] + [(0, i/og) for i in range(og+1)] + [(i/og,1.0) for i in range(og+1)] + [(1.0, i/og) for i in range(og+1)]
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ir_quad = ngs.IntegrationRule(ipts, [0,]*len(ipts))
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vb = [ngs.VOL, ngs.BND][mesh.dim-2]
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if region and region.VB() == vb:
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vb = region
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cf = func1 if draw_surf else func0
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timer2map.Start()
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pts = mesh.MapToAllElements({ngs.ET.TRIG: ir_trig, ngs.ET.QUAD: ir_quad}, vb)
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timer2map.Stop()
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pmat = cf(pts)
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timermult.Start()
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pmat = pmat.reshape(-1, og+1, 4)
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if False:
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BezierPnts = np.tensordot(iBvals.NumPy(), pmat, axes=(1,1))
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else:
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BezierPnts = np.zeros( (og+1, pmat.shape[0], 4) )
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for i in range(4):
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ngsmat = ngs.Matrix(pmat[:,:,i].transpose())
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BezierPnts[:,:,i] = iBvals * ngsmat
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timermult.Stop()
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timer2list.Start()
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for i in range(og+1):
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Bezier_points.append(encodeData(BezierPnts[i]))
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timer2list.Stop()
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d['Bezier_points'] = Bezier_points
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ipts = [(i/og,0) for i in range(og+1)]
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ir_seg = ngs.IntegrationRule(ipts, [0,]*len(ipts))
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vb = [ngs.VOL, ngs.BND, ngs.BBND][mesh.dim-1]
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if region and region.VB() == vb:
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vb = region
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pts = mesh.MapToAllElements(ir_seg, vb)
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pmat = func0(pts)
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pmat = pmat.reshape(-1, og+1, 4)
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edge_data = np.tensordot(iBvals.NumPy(), pmat, axes=(1,1))
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edges = []
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for i in range(og+1):
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edges.append(encodeData(edge_data[i]))
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d['edges'] = edges
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ndtrig = int((og+1)*(og+2)/2)
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if og in bezier_trig_trafos.keys():
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iBvals_trig = bezier_trig_trafos[og]
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else:
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def BernsteinTrig(x, y, i, j, n):
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return math.factorial(n)/math.factorial(i)/math.factorial(j)/math.factorial(n-i-j) \
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* x**i*y**j*(1-x-y)**(n-i-j)
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Bvals = ngs.Matrix(ndtrig, ndtrig)
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ii = 0
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for ix in range(og+1):
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for iy in range(og+1-ix):
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jj = 0
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for jx in range(og+1):
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for jy in range(og+1-jx):
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Bvals[ii,jj] = BernsteinTrig(ix/og, iy/og, jx, jy, og)
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jj += 1
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ii += 1
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iBvals_trig = Bvals.I
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bezier_trig_trafos[og] = iBvals_trig
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# Bezier_points = [ [] for i in range(ndtrig) ]
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Bezier_points = []
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ipts = [(i/og,j/og) for j in range(og+1) for i in range(og+1-j)]
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ir_trig = ngs.IntegrationRule(ipts, [0,]*len(ipts))
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ipts = ([(i/og,j/og) for j in range(og+1) for i in range(og+1-j)] +
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[(1-i/og,1-j/og) for j in range(og+1) for i in range(og+1-j)])
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ir_quad = ngs.IntegrationRule(ipts, [0,]*len(ipts))
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vb = [ngs.VOL, ngs.BND][mesh.dim-2]
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if region and region.VB() == vb:
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vb = region
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pts = mesh.MapToAllElements({ngs.ET.TRIG: ir_trig, ngs.ET.QUAD: ir_quad}, vb)
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pmat = ngs.CoefficientFunction( func1 if draw_surf else func0 ) (pts)
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funcmin = np.min(pmat[:,3])
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funcmax = np.max(pmat[:,3])
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pmin = np.min(pmat[:,0:3], axis=0)
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pmax = np.max(pmat[:,0:3], axis=0)
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mesh_center = 0.5*(pmin+pmax)
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mesh_radius = np.linalg.norm(pmax-pmin)/2
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pmat = pmat.reshape(-1, len(ir_trig), 4)
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BezierPnts = np.tensordot(iBvals_trig.NumPy(), pmat, axes=(1,1))
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for i in range(ndtrig):
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Bezier_points.append(encodeData(BezierPnts[i]))
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d['Bezier_trig_points'] = Bezier_points
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d['mesh_center'] = list(mesh_center)
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d['mesh_radius'] = mesh_radius
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if func:
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d['funcmin'] = funcmin
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d['funcmax'] = funcmax
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return d
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def Draw(shape, clipping=None, js_code=None, filename=""):
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# todo: also handle occ geometry, list of shapes, etc.
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scene = WebGLScene(shape, clipping=clipping, on_init=js_code)
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if wg._IN_IPYTHON:
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if wg._IN_GOOGLE_COLAB:
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from IPython.display import display, HTML
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html = scene.GenerateHTML()
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display(HTML(html))
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else:
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# render scene using widgets.DOMWidget
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scene.Draw()
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return scene
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else:
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if filename:
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scene.GenerateHTML(filename=filename)
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return scene
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