mirror of
https://github.com/NGSolve/netgen.git
synced 2024-12-24 21:10:33 +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 @@
|
||||
|
||||
using namespace netgen;
|
||||
|
||||
void ExtractFaceData( const TopoDS_Face & face, int index, std::vector<double> * p, Box<3> & box )
|
||||
{
|
||||
Handle(Geom_Surface) surf = BRep_Tool::Surface (face);
|
||||
|
||||
TopLoc_Location loc;
|
||||
Handle(Poly_Triangulation) triangulation = BRep_Tool::Triangulation (face, loc);
|
||||
|
||||
bool flip = TopAbs_REVERSED == face.Orientation();
|
||||
|
||||
int ntriangles = triangulation -> NbTriangles();
|
||||
for (int j = 1; j <= ntriangles; j++)
|
||||
{
|
||||
Poly_Triangle triangle = (triangulation -> Triangles())(j);
|
||||
std::array<Point<3>,3> pts;
|
||||
for (int k = 0; k < 3; k++)
|
||||
pts[k] = occ2ng( (triangulation -> Nodes())(triangle(k+1)).Transformed(loc) );
|
||||
|
||||
if(flip)
|
||||
Swap(pts[1], pts[2]);
|
||||
|
||||
for (int k = 0; k < 3; k++)
|
||||
{
|
||||
box.Add(pts[k]);
|
||||
for (int d = 0; d < 3; d++)
|
||||
p[k].push_back( pts[k][d] );
|
||||
p[k].push_back( index );
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
py::object CastShape(const TopoDS_Shape & s)
|
||||
{
|
||||
@ -543,6 +572,74 @@ DLL_HEADER void ExportNgOCCShapes(py::module &m)
|
||||
// return MoveToNumpyArray(triangles);
|
||||
return triangles;
|
||||
})
|
||||
.def("_webgui_data", [](const TopoDS_Shape & shape)
|
||||
{
|
||||
BRepTools::Clean (shape);
|
||||
double deflection = 0.01;
|
||||
BRepMesh_IncrementalMesh (shape, deflection, true);
|
||||
// triangulation = BRep_Tool::Triangulation (face, loc);
|
||||
|
||||
std::vector<double> p[3];
|
||||
py::list names, colors;
|
||||
|
||||
int index = 0;
|
||||
|
||||
Box<3> box(Box<3>::EMPTY_BOX);
|
||||
for (TopExp_Explorer e(shape, TopAbs_FACE); e.More(); e.Next())
|
||||
{
|
||||
TopoDS_Face face = TopoDS::Face(e.Current());
|
||||
// Handle(TopoDS_Face) face = e.Current();
|
||||
ExtractFaceData(face, index, p, box);
|
||||
auto & props = OCCGeometry::global_shape_properties[face.TShape()];
|
||||
if(props.col)
|
||||
{
|
||||
auto & c = *props.col;
|
||||
colors.append(py::make_tuple(c[0], c[1], c[2]));
|
||||
}
|
||||
else
|
||||
colors.append(py::make_tuple(0.0, 1.0, 0.0));
|
||||
if(props.name)
|
||||
{
|
||||
names.append(*props.name);
|
||||
}
|
||||
else
|
||||
names.append("");
|
||||
index++;
|
||||
}
|
||||
|
||||
auto center = box.Center();
|
||||
|
||||
py::list mesh_center;
|
||||
mesh_center.append(center[0]);
|
||||
mesh_center.append(center[1]);
|
||||
mesh_center.append(center[2]);
|
||||
py::dict data;
|
||||
data["ngsolve_version"] = "Netgen x.x"; // TODO
|
||||
data["mesh_dim"] = 3; // TODO
|
||||
data["mesh_center"] = mesh_center;
|
||||
data["mesh_radius"] = box.Diam()/2;
|
||||
data["order2d"] = 1;
|
||||
data["order3d"] = 0;
|
||||
data["draw_vol"] = false;
|
||||
data["draw_surf"] = true;
|
||||
data["funcdim"] = 0;
|
||||
data["show_wireframe"] = false;
|
||||
data["show_mesh"] = true;
|
||||
data["edges"] = py::list{};
|
||||
data["Bezier_points"] = py::list{};
|
||||
py::list points;
|
||||
points.append(p[0]);
|
||||
points.append(p[1]);
|
||||
points.append(p[2]);
|
||||
data["Bezier_trig_points"] = points;
|
||||
data["funcmin"] = 0;
|
||||
data["funcmax"] = 1;
|
||||
data["mesh_regions_2d"] = index;
|
||||
data["autoscale"] = false;
|
||||
data["colors"] = colors;
|
||||
data["names"] = names;
|
||||
return data;
|
||||
})
|
||||
;
|
||||
|
||||
py::class_<TopoDS_Vertex, TopoDS_Shape> (m, "TopoDS_Vertex")
|
||||
|
||||
@ -3,6 +3,7 @@ configure_file(__init__.py ${CMAKE_CURRENT_BINARY_DIR}/__init__.py @ONLY)
|
||||
install(FILES
|
||||
${CMAKE_CURRENT_BINARY_DIR}/__init__.py
|
||||
meshing.py csg.py geom2d.py stl.py gui.py NgOCC.py occ.py read_gmsh.py
|
||||
webgui.py
|
||||
DESTINATION ${NG_INSTALL_DIR_PYTHON}/${NG_INSTALL_SUFFIX}
|
||||
COMPONENT netgen
|
||||
)
|
||||
|
||||
247
python/webgui.py
Normal file
247
python/webgui.py
Normal file
@ -0,0 +1,247 @@
|
||||
import math
|
||||
import numpy as np
|
||||
from time import time
|
||||
import os
|
||||
|
||||
from webgui_jupyter_widgets import BaseWebGuiScene, encodeData, WebGuiDocuWidget
|
||||
import webgui_jupyter_widgets.widget as wg
|
||||
|
||||
class WebGLScene(BaseWebGuiScene):
|
||||
def __init__(self, mesh, clipping, on_init):
|
||||
from IPython.display import display, Javascript
|
||||
import threading
|
||||
self.mesh = mesh
|
||||
self.clipping = clipping
|
||||
self.on_init = on_init
|
||||
|
||||
def GetData(self, set_minmax=True):
|
||||
import json
|
||||
# d = BuildRenderData(self.mesh, self.cf, self.order, draw_surf=self.draw_surf, draw_vol=self.draw_vol, deformation=self.deformation, region=self.region)
|
||||
d = self.mesh._webgui_data()
|
||||
bp = d['Bezier_trig_points']
|
||||
for i in range(len(bp)):
|
||||
bp[i] = encodeData(np.array(bp[i]))
|
||||
|
||||
|
||||
if self.clipping is not None:
|
||||
d['clipping'] = True
|
||||
if isinstance(self.clipping, dict):
|
||||
allowed_args = ("x", "y", "z", "dist", "function", "pnt", "vec")
|
||||
if "vec" in self.clipping:
|
||||
vec = self.clipping["vec"]
|
||||
self.clipping["x"] = vec[0]
|
||||
self.clipping["y"] = vec[1]
|
||||
self.clipping["z"] = vec[2]
|
||||
if "pnt" in self.clipping:
|
||||
d['mesh_center'] = list(self.clipping["pnt"])
|
||||
for name, val in self.clipping.items():
|
||||
if not (name in allowed_args):
|
||||
raise Exception('Only {} allowed as arguments for clipping!'.format(", ".join(allowed_args)))
|
||||
d['clipping_' + name] = val
|
||||
|
||||
if self.on_init:
|
||||
d['on_init'] = self.on_init
|
||||
|
||||
return d
|
||||
|
||||
|
||||
bezier_trig_trafos = { } # cache trafos for different orders
|
||||
|
||||
def BuildRenderData(mesh, func, order=2, draw_surf=True, draw_vol=True, deformation=None, region=True):
|
||||
d = {}
|
||||
d['ngsolve_version'] = "Netgen"
|
||||
d['mesh_dim'] = 3 # mesh.dim TODO
|
||||
|
||||
d['order2d'] = 1
|
||||
d['order3d'] = 0
|
||||
|
||||
d['draw_vol'] = False
|
||||
d['draw_surf'] = True
|
||||
d['funcdim'] = 1
|
||||
|
||||
func2 = None
|
||||
if func and func.is_complex:
|
||||
d['is_complex'] = True
|
||||
func1 = func[0].real
|
||||
func2 = ngs.CoefficientFunction( (func[0].imag, 0.0) )
|
||||
elif func and func.dim>1:
|
||||
func1 = func[0]
|
||||
func2 = ngs.CoefficientFunction( tuple(func[i] if i<func.dim else 0.0 for i in range(1,3)) ) # max 3-dimensional functions
|
||||
d['funcdim'] = func.dim
|
||||
elif func:
|
||||
func1 = func
|
||||
d['funcdim'] = 1
|
||||
else:
|
||||
# no function at all -> we are just drawing a mesh, eval mesh element index instead
|
||||
mats = mesh.GetMaterials()
|
||||
bnds = mesh.GetBoundaries()
|
||||
nmats = len(mesh.GetMaterials())
|
||||
nbnds = len(mesh.GetBoundaries())
|
||||
n = max(nmats, nbnds)
|
||||
func1 = ngs.CoefficientFunction(list(range(n)))
|
||||
n_regions = [0, 0, nmats, nbnds]
|
||||
d['mesh_regions_2d'] = n_regions[mesh.dim]
|
||||
d['mesh_regions_3d'] = nmats if mesh.dim==3 else 0
|
||||
d['funcdim'] = 0
|
||||
func1 = ngs.CoefficientFunction( (ngs.x, ngs.y, ngs.z, func1 ) )
|
||||
func0 = ngs.CoefficientFunction( (ngs.x, ngs.y, ngs.z, 0.0 ) )
|
||||
if deformation is not None:
|
||||
func1 += ngs.CoefficientFunction((deformation, 0.0))
|
||||
func0 += ngs.CoefficientFunction((deformation, 0.0))
|
||||
|
||||
d['show_wireframe'] = False
|
||||
d['show_mesh'] = True
|
||||
if order2d>0:
|
||||
og = order2d
|
||||
d['show_wireframe'] = True
|
||||
d['show_mesh'] = True
|
||||
timer2.Start()
|
||||
|
||||
timer3Bvals.Start()
|
||||
|
||||
# transform point-values to Bernsteinbasis
|
||||
def Binomial(n,i): return math.factorial(n) / math.factorial(i) / math.factorial(n-i)
|
||||
def Bernstein(x, i, n): return Binomial(n,i) * x**i*(1-x)**(n-i)
|
||||
Bvals = ngs.Matrix(og+1,og+1)
|
||||
for i in range(og+1):
|
||||
for j in range(og+1):
|
||||
Bvals[i,j] = Bernstein(i/og, j, og)
|
||||
iBvals = Bvals.I
|
||||
timer3Bvals.Stop()
|
||||
# print (Bvals)
|
||||
# print (iBvals)
|
||||
|
||||
|
||||
Bezier_points = []
|
||||
|
||||
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)]
|
||||
ir_trig = ngs.IntegrationRule(ipts, [0,]*len(ipts))
|
||||
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)]
|
||||
ir_quad = ngs.IntegrationRule(ipts, [0,]*len(ipts))
|
||||
|
||||
vb = [ngs.VOL, ngs.BND][mesh.dim-2]
|
||||
if region and region.VB() == vb:
|
||||
vb = region
|
||||
cf = func1 if draw_surf else func0
|
||||
timer2map.Start()
|
||||
pts = mesh.MapToAllElements({ngs.ET.TRIG: ir_trig, ngs.ET.QUAD: ir_quad}, vb)
|
||||
timer2map.Stop()
|
||||
pmat = cf(pts)
|
||||
|
||||
timermult.Start()
|
||||
pmat = pmat.reshape(-1, og+1, 4)
|
||||
if False:
|
||||
BezierPnts = np.tensordot(iBvals.NumPy(), pmat, axes=(1,1))
|
||||
else:
|
||||
BezierPnts = np.zeros( (og+1, pmat.shape[0], 4) )
|
||||
for i in range(4):
|
||||
ngsmat = ngs.Matrix(pmat[:,:,i].transpose())
|
||||
BezierPnts[:,:,i] = iBvals * ngsmat
|
||||
timermult.Stop()
|
||||
|
||||
timer2list.Start()
|
||||
for i in range(og+1):
|
||||
Bezier_points.append(encodeData(BezierPnts[i]))
|
||||
timer2list.Stop()
|
||||
|
||||
d['Bezier_points'] = Bezier_points
|
||||
|
||||
ipts = [(i/og,0) for i in range(og+1)]
|
||||
ir_seg = ngs.IntegrationRule(ipts, [0,]*len(ipts))
|
||||
vb = [ngs.VOL, ngs.BND, ngs.BBND][mesh.dim-1]
|
||||
if region and region.VB() == vb:
|
||||
vb = region
|
||||
pts = mesh.MapToAllElements(ir_seg, vb)
|
||||
pmat = func0(pts)
|
||||
pmat = pmat.reshape(-1, og+1, 4)
|
||||
edge_data = np.tensordot(iBvals.NumPy(), pmat, axes=(1,1))
|
||||
edges = []
|
||||
for i in range(og+1):
|
||||
edges.append(encodeData(edge_data[i]))
|
||||
d['edges'] = edges
|
||||
|
||||
ndtrig = int((og+1)*(og+2)/2)
|
||||
|
||||
if og in bezier_trig_trafos.keys():
|
||||
iBvals_trig = bezier_trig_trafos[og]
|
||||
else:
|
||||
def BernsteinTrig(x, y, i, j, n):
|
||||
return math.factorial(n)/math.factorial(i)/math.factorial(j)/math.factorial(n-i-j) \
|
||||
* x**i*y**j*(1-x-y)**(n-i-j)
|
||||
Bvals = ngs.Matrix(ndtrig, ndtrig)
|
||||
ii = 0
|
||||
for ix in range(og+1):
|
||||
for iy in range(og+1-ix):
|
||||
jj = 0
|
||||
for jx in range(og+1):
|
||||
for jy in range(og+1-jx):
|
||||
Bvals[ii,jj] = BernsteinTrig(ix/og, iy/og, jx, jy, og)
|
||||
jj += 1
|
||||
ii += 1
|
||||
iBvals_trig = Bvals.I
|
||||
bezier_trig_trafos[og] = iBvals_trig
|
||||
|
||||
|
||||
# Bezier_points = [ [] for i in range(ndtrig) ]
|
||||
Bezier_points = []
|
||||
|
||||
ipts = [(i/og,j/og) for j in range(og+1) for i in range(og+1-j)]
|
||||
ir_trig = ngs.IntegrationRule(ipts, [0,]*len(ipts))
|
||||
ipts = ([(i/og,j/og) for j in range(og+1) for i in range(og+1-j)] +
|
||||
[(1-i/og,1-j/og) for j in range(og+1) for i in range(og+1-j)])
|
||||
ir_quad = ngs.IntegrationRule(ipts, [0,]*len(ipts))
|
||||
|
||||
vb = [ngs.VOL, ngs.BND][mesh.dim-2]
|
||||
if region and region.VB() == vb:
|
||||
vb = region
|
||||
pts = mesh.MapToAllElements({ngs.ET.TRIG: ir_trig, ngs.ET.QUAD: ir_quad}, vb)
|
||||
|
||||
pmat = ngs.CoefficientFunction( func1 if draw_surf else func0 ) (pts)
|
||||
|
||||
|
||||
funcmin = np.min(pmat[:,3])
|
||||
funcmax = np.max(pmat[:,3])
|
||||
pmin = np.min(pmat[:,0:3], axis=0)
|
||||
pmax = np.max(pmat[:,0:3], axis=0)
|
||||
|
||||
mesh_center = 0.5*(pmin+pmax)
|
||||
mesh_radius = np.linalg.norm(pmax-pmin)/2
|
||||
|
||||
pmat = pmat.reshape(-1, len(ir_trig), 4)
|
||||
|
||||
BezierPnts = np.tensordot(iBvals_trig.NumPy(), pmat, axes=(1,1))
|
||||
|
||||
for i in range(ndtrig):
|
||||
Bezier_points.append(encodeData(BezierPnts[i]))
|
||||
|
||||
|
||||
d['Bezier_trig_points'] = Bezier_points
|
||||
d['mesh_center'] = list(mesh_center)
|
||||
d['mesh_radius'] = mesh_radius
|
||||
|
||||
|
||||
|
||||
if func:
|
||||
d['funcmin'] = funcmin
|
||||
d['funcmax'] = funcmax
|
||||
return d
|
||||
|
||||
def Draw(shape, clipping=None, js_code=None, filename=""):
|
||||
# todo: also handle occ geometry, list of shapes, etc.
|
||||
|
||||
scene = WebGLScene(shape, clipping=clipping, on_init=js_code)
|
||||
|
||||
if wg._IN_IPYTHON:
|
||||
if wg._IN_GOOGLE_COLAB:
|
||||
from IPython.display import display, HTML
|
||||
html = scene.GenerateHTML()
|
||||
display(HTML(html))
|
||||
else:
|
||||
# render scene using widgets.DOMWidget
|
||||
scene.Draw()
|
||||
return scene
|
||||
else:
|
||||
if filename:
|
||||
scene.GenerateHTML(filename=filename)
|
||||
return scene
|
||||
|
||||
Loading…
Reference in New Issue
Block a user