def assignElements2Dlin(mesh, elements):
numRows, numCols = elements.shape
# TODO can we do this faster?
for i in range(numRows):
v0, v1, v2, v3, v4, v5 = elements[i, :]
tri1 = vtk.vtkTriangle()
tri1.GetPointIds().SetId(0, v0)
tri1.GetPointIds().SetId(1, v3)
tri1.GetPointIds().SetId(2, v4)
tri2 = vtk.vtkTriangle()
tri2.GetPointIds().SetId(0, v3)
tri2.GetPointIds().SetId(1, v1)
tri2.GetPointIds().SetId(2, v5)
tri3 = vtk.vtkTriangle()
tri3.GetPointIds().SetId(0, v3)
tri3.GetPointIds().SetId(1, v5)
tri3.GetPointIds().SetId(2, v4)
tri4 = vtk.vtkTriangle()
tri4.GetPointIds().SetId(0, v4)
tri4.GetPointIds().SetId(1, v5)
tri4.GetPointIds().SetId(2, v2)
mesh.InsertNextCell(tri1.GetCellType(), tri1.GetPointIds())
mesh.InsertNextCell(tri1.GetCellType(), tri2.GetPointIds())
mesh.InsertNextCell(tri1.GetCellType(), tri3.GetPointIds())
mesh.InsertNextCell(tri1.GetCellType(), tri4.GetPointIds())
return mesh
def setup_topography(x, y, topography, xmax=None, ymax=None, decimation=1):
# Define points, triangles and colors
x = x[::decimation]
y = y[::decimation]
lonsize = len(x)-1 if not xmax else xmax
latsize = len(y)-1 if not ymax else ymax
colors = vtk.vtkUnsignedCharArray()
# colors.SetNumberOfComponents(3)
colors.SetNumberOfComponents(1)
points = vtk.vtkPoints()
triangles = vtk.vtkCellArray()
zmax = topography.max()
zmin = topography.min()
zrange = zmax - zmin
xmesh, ymesh = scaled_mesh(x, y)
count = 0
t1 = time.time()
topography = topography.T
topo_new = num.zeros((len(y), len(x)))
for iy in xrange(len(y)):
topo_new[iy, :] = topography[iy*decimation, ::decimation]
topography = topo_new
for i in xrange(latsize):
print '%i / %i' % (i+1, latsize)
for j in xrange(lonsize-3):
d = (ymesh[i][j], xmesh[i][j], topography[i][j])
c = (ymesh[i][j+1], xmesh[i][j+1], topography[i][j+1])
b = (ymesh[i+1][j+1], xmesh[i+1][j+1], topography[i+1][j+1])
a = (ymesh[i+1][j], xmesh[i+1][j], topography[i+1][j])
points.InsertNextPoint(*a)
points.InsertNextPoint(*b)
points.InsertNextPoint(*c)
triangle = vtk.vtkTriangle()
triangle.GetPointIds().SetId(0, count)
triangle.GetPointIds().SetId(1, count + 1)
triangle.GetPointIds().SetId(2, count + 2)
triangles.InsertNextCell(triangle)
points.InsertNextPoint(*a)
points.InsertNextPoint(*d)
points.InsertNextPoint(*c)
triangle = vtk.vtkTriangle()
triangle.GetPointIds().SetId(0, count + 3)
triangle.GetPointIds().SetId(1, count + 4)
triangle.GetPointIds().SetId(2, count + 5)
count += 6
triangles.InsertNextCell(triangle)
# rs = [[int((zmax-topography[j][i])/zrange*255)]]*6
rs = [[int((zmax-topography[i][j])/zrange*255)]]*6
map(colors.InsertNextTupleValue, rs)
print 'total time needed ', time.time()-t1
return points, triangles, colors
def vtkTile(tile, min_temp, max_temp):
# calcula a intensidade da cor para representar a temperatura.
# vermelho, com pastilha. azul, estourou
intensity = 255 - int(((tile.last_temp - min_temp) / (max_temp - min_temp)) * 256)
if tile.bursted:
color = (intensity, intensity, 255)
else:
color = (255, intensity, intensity)
Points = vtk.vtkPoints()
Triangles = vtk.vtkCellArray()
Points.InsertNextPoint(*tile.edges[0])
Points.InsertNextPoint(*tile.edges[1])
Points.InsertNextPoint(*tile.edges[2])
Points.InsertNextPoint(*tile.edges[3])
Triangle1 = vtk.vtkTriangle();
Triangle1.GetPointIds().SetId(0, 0);
Triangle1.GetPointIds().SetId(1, 1);
Triangle1.GetPointIds().SetId(2, 2);
Triangles.InsertNextCell(Triangle1);
Triangle2 = vtk.vtkTriangle();
Triangle2.GetPointIds().SetId(0, 1);
Triangle2.GetPointIds().SetId(1, 3);
Triangle2.GetPointIds().SetId(2, 2);
Triangles.InsertNextCell(Triangle2);
Colors = vtk.vtkUnsignedCharArray();
Colors.SetNumberOfComponents(3);
Colors.SetName("Colors");
Colors.InsertNextTuple3(*color);
Colors.InsertNextTuple3(*color);
polydata = vtk.vtkPolyData()
polydata.SetPoints(Points)
polydata.SetPolys(Triangles)
polydata.GetCellData().SetScalars(Colors);
polydata.Modified()
polydata.Update()
mapper = vtk.vtkPolyDataMapper()
mapper.SetInput(polydata)
actor = vtk.vtkActor()
actor.SetMapper(mapper)
actor.GetProperty().SetAmbient(1.0)
actor.GetProperty().SetDiffuse(0.0)
return actor
def Gen_uGrid(new_pt, new_fc):
""" Generates a vtk unstructured grid given points and triangular faces"""
ints = np.ones(len(new_fc), 'int') * 3
cells = np.hstack((ints.reshape(-1, 1), np.vstack(new_fc)))
# Generate vtk mesh
# Convert points to vtkfloat object
points = np.vstack(new_pt)
vtkArray = VN.numpy_to_vtk(np.ascontiguousarray(points),
deep=True) #, deep=True)
points = vtk.vtkPoints()
points.SetData(vtkArray)
# Convert to vtk arrays
tritype = vtk.vtkTriangle().GetCellType() * np.ones(len(new_fc), 'int')
cell_type = np.ascontiguousarray(tritype).astype('uint8')
cell_type = VN.numpy_to_vtk(cell_type, deep=True)
offset = np.cumsum(np.hstack(ints + 1))
offset = np.ascontiguousarray(np.delete(np.insert(offset, 0, 0),
-1)).astype('int64') # shift
offset = VN.numpy_to_vtkIdTypeArray(offset, deep=True)
cells = np.ascontiguousarray(np.hstack(cells).astype('int64'))
vtkcells = vtk.vtkCellArray()
vtkcells.SetCells(cells.shape[0],
VN.numpy_to_vtkIdTypeArray(cells, deep=True))
# Create unstructured grid
uGrid = vtk.vtkUnstructuredGrid()
uGrid.SetPoints(points)
uGrid.SetCells(cell_type, offset, vtkcells)
return uGrid
def _build_vtkPolyData(vertices, faces):
"""Builds a vtkPolyData object from vertices and faces"""
import vtk
# Create a vtkPoints object and store the points in it
points = vtk.vtkPoints()
for point in vertices:
points.InsertNextPoint(point)
# Create a vtkCellArray to store faces
cell_array = vtk.vtkCellArray()
for face_ids in faces:
if face_ids[0] == face_ids[-1]:
# Triangle
curface = face_ids[:3]
vtk_face = vtk.vtkTriangle()
else:
# Quadrangle
curface = face_ids[:4]
vtk_face = vtk.vtkQuad()
for idx, id in enumerate(curface):
vtk_face.GetPointIds().SetId(idx, id)
cell_array.InsertNextCell(vtk_face)
polydata_mesh = vtk.vtkPolyData()
polydata_mesh.SetPoints(points)
polydata_mesh.SetPolys(cell_array)
return polydata_mesh
def getMembraneVtkGrid(visMesh):
assert isinstance(visMesh, VisMesh)
vtkpoints = vtk.vtkPoints()
for visPoint in visMesh.surfacePoints:
vtkpoints.InsertNextPoint(visPoint.x, visPoint.y, visPoint.z)
vtkgrid = vtk.vtkUnstructuredGrid()
vtkgrid.Allocate(len(visMesh.surfacePoints), len(visMesh.surfacePoints))
vtkgrid.SetPoints(vtkpoints)
if visMesh.dimension == 2:
vtkline = vtk.vtkLine()
lineType = vtkline.GetCellType()
for line in visMesh.visLines:
pts = vtk.vtkIdList()
pts.InsertNextId(line.p1)
pts.InsertNextId(line.p2)
vtkgrid.InsertNextCell(lineType, pts)
else:
vtktriangle = vtk.vtkTriangle()
triangleType = vtktriangle.GetCellType()
for surfaceTriangle in visMesh.surfaceTriangles:
pts = vtk.vtkIdList()
for pi in surfaceTriangle.pointIndices:
pts.InsertNextId(pi)
# each triangle is a cell
vtkgrid.InsertNextCell(triangleType, pts)
vtkgrid.BuildLinks()
return vtkgrid
def getPolyData(self, faces, vertices):
points = vtk.vtkPoints()
for v in vertices:
points.InsertNextPoint(*v)
triangles = vtk.vtkCellArray()
for f in faces:
triangle = vtk.vtkTriangle()
for j in range(3):
triangle.GetPointIds().SetId(j,
int(f[j]) -
1) # fix 1based matlab index
triangles.InsertNextCell(triangle)
pd = vtk.vtkPolyData()
pd.SetPoints(points)
pd.SetPolys(triangles)
# Compute surface normals for better appearance
normals = vtk.vtkPolyDataNormals()
normals.SetInputData(pd)
normals.ConsistencyOn()
normals.AutoOrientNormalsOn()
normals.Update()
return normals.GetOutput()
def make_poly_data(points, faces, color):
vtk_points = vtk.vtkPoints()
vtk_faces = vtk.vtkCellArray()
colors = vtk.vtkUnsignedCharArray()
colors.SetNumberOfComponents(3)
colors.SetName('colors')
for i, p in enumerate(points):
vtk_points.InsertNextPoint(p)
colors.InsertNextTypedTuple(color)
for i, f in enumerate(faces):
triangle = vtk.vtkTriangle()
triangle.GetPointIds().SetId(0, f[0])
triangle.GetPointIds().SetId(1, f[1])
triangle.GetPointIds().SetId(2, f[2])
vtk_faces.InsertNextCell(triangle)
poly_data = vtk.vtkPolyData()
poly_data.SetPoints(vtk_points)
poly_data.SetPolys(vtk_faces)
poly_data.GetPointData().SetScalars(colors)
poly_data.Modified()
return poly_data
def CreatePolyData( pts, faces ):
"""
Creates vtkPolyData from vertices and faces
pts numpy.array: Nx3 array of vertices
faces numpy.array: Mx3 array of faces
Return vtkPolyData
"""
(nv,mv) = pts.shape
(nf,mf) = faces.shape
cells = vtk.vtkCellArray()
for j in range(nf):
cell = vtk.vtkTriangle()
cell.GetPointIds().SetNumberOfIds(3)
cell.GetPointIds().SetId( 0, faces[j,0] )
cell.GetPointIds().SetId( 1, faces[j,1] )
cell.GetPointIds().SetId( 2, faces[j,2] )
cells.InsertNextCell( cell )
points = vtk.vtkPoints()
points.SetNumberOfPoints(nv)
for j in range(nv):
points.SetPoint( j, pts[j,0], pts[j,1], pts[j,2] )
new_mesh = vtk.vtkPolyData()
new_mesh.SetPoints( points )
new_mesh.SetPolys( cells )
new_mesh.BuildCells()
return new_mesh
def Gen_uGrid(new_pt, new_fc):
""" Generates a vtk unstructured grid given points and triangular faces"""
ints = np.ones(len(new_fc), 'int')*3
cells = np.hstack((ints.reshape(-1, 1), np.vstack(new_fc)))
# Generate vtk mesh
# Convert points to vtkfloat object
points = np.vstack(new_pt)
vtkArray = VN.numpy_to_vtk(np.ascontiguousarray(points), deep=True)#, deep=True)
points = vtk.vtkPoints()
points.SetData(vtkArray)
# Convert to vtk arrays
tritype = vtk.vtkTriangle().GetCellType()*np.ones(len(new_fc), 'int')
cell_type = np.ascontiguousarray(tritype).astype('uint8')
cell_type = VN.numpy_to_vtk(cell_type, deep=True)
offset = np.cumsum(np.hstack(ints + 1))
offset = np.ascontiguousarray(np.delete(np.insert(offset, 0, 0), -1)).astype('int64') # shift
offset = VN.numpy_to_vtkIdTypeArray(offset, deep=True)
cells = np.ascontiguousarray(np.hstack(cells).astype('int64'))
vtkcells = vtk.vtkCellArray()
vtkcells.SetCells(cells.shape[0], VN.numpy_to_vtkIdTypeArray(cells, deep=True))
# Create unstructured grid
uGrid = vtk.vtkUnstructuredGrid()
uGrid.SetPoints(points)
uGrid.SetCells(cell_type, offset, vtkcells)
return uGrid
def _create_tecplot_shells(self, is_quads, quads, is_tris, tris):
if is_quads:
elements = quads
for iface, face in enumerate(quads):
elem = vtkQuad()
epoints = elem.GetPointIds()
epoints.SetId(0, face[0])
epoints.SetId(1, face[1])
epoints.SetId(2, face[2])
epoints.SetId(3, face[3])
self.grid.InsertNextCell(
elem.GetCellType(),
elem.GetPointIds()) #elem.GetCellType() = 5 # vtkTriangle
#break
if is_tris:
elements = tris
for iface, face in enumerate(tris):
elem = vtkTriangle()
epoints = elem.GetPointIds()
epoints.SetId(0, face[0])
epoints.SetId(1, face[1])
epoints.SetId(2, face[2])
self.grid.InsertNextCell(
5,
elem.GetPointIds()) #elem.GetCellType() = 5 # vtkTriangle
def __init__(self, filename=None, triangleList=[], color=(1,1,1) ):
self.src=[]
points = vtk.vtkPoints()
triangles = vtk.vtkCellArray()
n=0
for t in triangleList:
triangle = vtk.vtkTriangle()
for p in t:
points.InsertNextPoint(p.x, p.y, p.z)
triangle.GetPointIds().SetId(0,n)
n=n+1
triangle.GetPointIds().SetId(1,n)
n=n+1
triangle.GetPointIds().SetId(2,n)
n=n+1
triangles.InsertNextCell(triangle)
polydata= vtk.vtkPolyData()
polydata.SetPoints(points)
polydata.SetPolys(triangles)
polydata.Modified()
polydata.Update()
self.src=polydata
self.mapper = vtk.vtkPolyDataMapper()
self.mapper.SetInput(self.src)
self.SetMapper(self.mapper)
self.SetColor(color)
def createPolyData(faces, vtList, verts, tcoords):
points = vtk.vtkPoints()
points.SetDataTypeToDouble()
points.SetNumberOfPoints(len(vtList))
tcoordArray = vtk.vtkDoubleArray()
tcoordArray.SetName('tcoords')
tcoordArray.SetNumberOfComponents(2)
tcoordArray.SetNumberOfTuples(len(vtList))
for i, vt in enumerate(vtList):
vi, ti = vt
xyz = verts[vi]
uv = tcoords[ti]
points.SetPoint(i, xyz)
tcoordArray.SetTuple2(i, uv[0], uv[1])
cells = vtk.vtkCellArray()
for i, face in enumerate(faces):
tri = vtk.vtkTriangle()
tri.GetPointIds().SetId(0, face[0])
tri.GetPointIds().SetId(1, face[1])
tri.GetPointIds().SetId(2, face[2])
cells.InsertNextCell(tri)
polyData = vtk.vtkPolyData()
polyData.SetPoints(points)
polyData.SetPolys(cells)
polyData.GetPointData().SetTCoords(tcoordArray)
return polyData
def create_cell(elem):
triangle = vtk.vtkTriangle()
ids = triangle.GetPointIds()
ids.SetId(0, elem[0])
ids.SetId(1, elem[1])
ids.SetId(2, elem[2])
return triangle
def get_polydata_from(points, tr_re):
numberPoints = len(points)
Points = vtkPoints()
ntype = get_numpy_array_type(Points.GetDataType())
points_vtk = numpy_to_vtk(np.asarray(points, order='C',dtype=ntype), deep=1)
Points.SetNumberOfPoints(numberPoints)
Points.SetData(points_vtk)
Triangles = vtkCellArray()
for item in tr_re:
Triangle = vtkTriangle()
Triangle.GetPointIds().SetId(0,item[0])
Triangle.GetPointIds().SetId(1,item[1])
Triangle.GetPointIds().SetId(2,item[2])
Triangles.InsertNextCell(Triangle)
polydata = vtkPolyData()
polydata.SetPoints(Points)
polydata.SetPolys(Triangles)
polydata.Modified()
polydata.Update()
return polydata
def _create_cart3d_group(self, name, model, element_id):
points = vtk.vtkPoints()
points.SetNumberOfPoints(self.nNodes)
nelements = len(element_id)
self.grid.Allocate(nelements, 1000)
nodes = self.model.get_nodes_associated_with_elements(element_id)
nodes.sort()
nid = 0
all_nodes = self.nodes
for i in all_nodes:
#if nid in nodes:
points.InsertPoint(nid, all_nodes[i, :])
nid += 1
from vtk import vtkTriangle
for eid in element_id:
elem = vtkTriangle()
node_ids = elements[eid, :]
elem_nodes = searchsorted(nodes, node_ids)
elem.GetPointIds().SetId(0, elem_nodes[0])
elem.GetPointIds().SetId(1, elem_nodes[1])
elem.GetPointIds().SetId(2, elem_nodes[2])
self.grid.InsertNextCell(5, elem.GetPointIds())
self.grid[name].SetPoints(points)
self.grid[name].Modified()
self.grid[name].Update()
def createPolyData(faces, vtList, verts, tcoords):
points = vtk.vtkPoints()
points.SetDataTypeToDouble()
points.SetNumberOfPoints(len(vtList))
tcoordArray = vtk.vtkDoubleArray()
tcoordArray.SetName('tcoords')
tcoordArray.SetNumberOfComponents(2)
tcoordArray.SetNumberOfTuples(len(vtList))
for i, vt in enumerate(vtList):
vi, ti = vt
xyz = verts[vi]
uv = tcoords[ti]
points.SetPoint(i, xyz)
tcoordArray.SetTuple2(i, uv[0], uv[1])
cells = vtk.vtkCellArray()
for i, face in enumerate(faces):
tri = vtk.vtkTriangle()
tri.GetPointIds().SetId(0, face[0])
tri.GetPointIds().SetId(1, face[1])
tri.GetPointIds().SetId(2, face[2])
cells.InsertNextCell(tri)
polyData = vtk.vtkPolyData()
polyData.SetPoints(points)
polyData.SetPolys(cells)
polyData.GetPointData().SetTCoords(tcoordArray)
return polyData
def main():
filenames = list()
uGrids = list()
uGrids.append(MakeUnstructuredGrid(vtk.vtkVertex()))
filenames.append('Vertex.vtu')
uGrids.append(MakePolyVertex())
filenames.append('PolyVertex.vtu')
uGrids.append(MakeUnstructuredGrid(vtk.vtkLine()))
filenames.append('Line.vtu')
uGrids.append(MakePolyLine())
filenames.append('PolyLine.vtu')
uGrids.append(MakeUnstructuredGrid(vtk.vtkTriangle()))
filenames.append('Triangle.vtu')
uGrids.append(MakeTriangleStrip())
filenames.append('TriangleStrip.vtu')
uGrids.append(MakePolygon())
filenames.append('Polygon.vtu')
uGrids.append(MakeUnstructuredGrid(vtk.vtkPixel()))
filenames.append('Pixel.vtu')
uGrids.append(MakeUnstructuredGrid(vtk.vtkQuad()))
filenames.append('Quad.vtu')
uGrids.append(MakeUnstructuredGrid(vtk.vtkTetra()))
filenames.append('Tetra.vtu')
uGrids.append(MakeUnstructuredGrid(vtk.vtkVoxel()))
filenames.append('Voxel.vtu')
uGrids.append(MakeUnstructuredGrid(vtk.vtkHexahedron()))
filenames.append('Hexahedron.vtu')
uGrids.append(MakeUnstructuredGrid(vtk.vtkWedge()))
filenames.append('Wedge.vtu')
uGrids.append(MakeUnstructuredGrid(vtk.vtkPyramid()))
filenames.append('Pyramid.vtu')
uGrids.append(MakeUnstructuredGrid(vtk.vtkPentagonalPrism()))
filenames.append('PentagonalPrism.vtu')
uGrids.append(MakeUnstructuredGrid(vtk.vtkHexagonalPrism()))
filenames.append('HexagonalPrism.vtu')
# Write each grid into a file
for i in range(0, len(uGrids)):
print('Writing: ', filenames[i])
writer = vtk.vtkXMLDataSetWriter()
writer.SetFileName(filenames[i])
writer.SetInputData(uGrids[i])
writer.Write()
def add_user_geometry(alt_grid: vtk.vtkUnstructuredGrid,
geom_grid: vtk.vtkUnstructuredGrid, xyz: np.ndarray,
nid_map: Dict[int, int], nnodes: int, bars: np.ndarray,
tris: np.ndarray, quads: np.ndarray, nelements: int,
nbars: int, ntris: int, nquads: int) -> vtk.vtkPoints:
"""helper method for ``_add_user_geometry``"""
# set points
points = numpy_to_vtk_points(xyz, dtype='<f')
if nelements > 0:
for i in range(nnodes):
elem = vtk.vtkVertex()
elem.GetPointIds().SetId(0, i)
alt_grid.InsertNextCell(elem.GetCellType(), elem.GetPointIds())
geom_grid.InsertNextCell(elem.GetCellType(), elem.GetPointIds())
else:
for i in range(nnodes):
elem = vtk.vtkVertex()
elem.GetPointIds().SetId(0, i)
alt_grid.InsertNextCell(elem.GetCellType(), elem.GetPointIds())
if nbars:
for i, bar in enumerate(bars[:, 1:]):
g1 = nid_map[bar[0]]
g2 = nid_map[bar[1]]
elem = vtk.vtkLine()
elem.GetPointIds().SetId(0, g1)
elem.GetPointIds().SetId(1, g2)
geom_grid.InsertNextCell(elem.GetCellType(), elem.GetPointIds())
if ntris:
for i, tri in enumerate(tris[:, 1:]):
g1 = nid_map[tri[0]]
g2 = nid_map[tri[1]]
g3 = nid_map[tri[2]]
elem = vtk.vtkTriangle()
elem.GetPointIds().SetId(0, g1)
elem.GetPointIds().SetId(1, g2)
elem.GetPointIds().SetId(2, g3)
geom_grid.InsertNextCell(5, elem.GetPointIds())
if nquads:
for i, quad in enumerate(quads[:, 1:]):
g1 = nid_map[quad[0]]
g2 = nid_map[quad[1]]
g3 = nid_map[quad[2]]
g4 = nid_map[quad[3]]
elem = vtk.vtkQuad()
point_ids = elem.GetPointIds()
point_ids.SetId(0, g1)
point_ids.SetId(1, g2)
point_ids.SetId(2, g3)
point_ids.SetId(3, g4)
geom_grid.InsertNextCell(9, elem.GetPointIds())
alt_grid.SetPoints(points)
if nelements > 0:
geom_grid.SetPoints(points)
return points
def main():
filenames = list()
uGrids = list()
uGrids.append(MakeUnstructuredGrid(vtk.vtkVertex()))
filenames.append("Vertex.vtk")
uGrids.append(MakePolyVertex())
filenames.append("PolyVertex.vtk")
uGrids.append(MakeUnstructuredGrid(vtk.vtkLine()))
filenames.append("Line.vtk")
uGrids.append(MakePolyLine())
filenames.append("PolyLine.vtk")
uGrids.append(MakeUnstructuredGrid(vtk.vtkTriangle()))
filenames.append("Triangle.vtk")
uGrids.append(MakeTriangleStrip())
filenames.append("TriangleStrip.vtk")
uGrids.append(MakePolygon())
filenames.append("Polygon.vtk")
uGrids.append(MakeUnstructuredGrid(vtk.vtkPixel()))
filenames.append("Pixel.vtk")
uGrids.append(MakeUnstructuredGrid(vtk.vtkQuad()))
filenames.append("Quad.vtk")
uGrids.append(MakeUnstructuredGrid(vtk.vtkTetra()))
filenames.append("Tetra.vtk")
uGrids.append(MakeUnstructuredGrid(vtk.vtkVoxel()))
filenames.append("Voxel.vtk")
uGrids.append(MakeUnstructuredGrid(vtk.vtkHexahedron()))
filenames.append("Hexahedron.vtk")
uGrids.append(MakeUnstructuredGrid(vtk.vtkWedge()))
filenames.append("Wedge.vtk")
uGrids.append(MakeUnstructuredGrid(vtk.vtkPyramid()))
filenames.append("Pyramid.vtk")
uGrids.append(MakeUnstructuredGrid(vtk.vtkPentagonalPrism()))
filenames.append("PentagonalPrism.vtk")
uGrids.append(MakeUnstructuredGrid(vtk.vtkHexagonalPrism()))
filenames.append("HexagonalPrism.vtk")
# Write each grid into a file
for i in range(0, len(uGrids)):
print("Writing: ", filenames[i])
writer = vtk.vtkUnstructuredGridWriter()
writer.SetFileName(filenames[i])
writer.SetInputData(uGrids[i])
writer.Write()
def save_frame_depth(self, path):
#setup camera
camera = vtkCamera()
camera.SetPosition(self.cx, self.cy, self.cz)
camera.SetFocalPoint(self.fx, self.fy, self.fz)
camera.SetViewUp(self.ux, self.uy, self.uz)
camera.SetViewAngle(self.fovy)
#setup renderer
renderer = vtkRenderer()
renderWindow = vtkRenderWindow()
renderWindow.SetOffScreenRendering(1)
renderWindow.AddRenderer(renderer)
renderWindow.SetSize(self.w, self.h)
for i in xrange(-1, self.expert.nr_obstacles_c()):
vss, nss, iss = self.save_frame_mesh(i)
#geometry
pts = vtkPoints()
for i in xrange(len(vss)):
pts.InsertNextPoint(vss[i][0], vss[i][1], vss[i][2])
tris = vtkCellArray()
for i in xrange(len(iss)):
triangle = vtkTriangle()
triangle.GetPointIds().SetId(0, iss[i][0])
triangle.GetPointIds().SetId(1, iss[i][1])
triangle.GetPointIds().SetId(2, iss[i][2])
tris.InsertNextCell(triangle)
poly = vtkPolyData()
poly.SetPoints(pts)
poly.SetPolys(tris)
#actor
mapper = vtkPolyDataMapper()
mapper.SetInput(poly)
actor = vtkActor()
actor.SetMapper(mapper)
renderer.AddActor(actor)
renderer.SetBackground(self.bk_r, self.bk_g, self.bk_b)
renderer.SetActiveCamera(camera)
renderWindow.Render()
#output options
windowToImageFilter = vtkWindowToImageFilter()
windowToImageFilter.SetInput(renderWindow)
windowToImageFilter.SetMagnification(1)
windowToImageFilter.SetInputBufferTypeToZBuffer()
#Extract z buffer value
windowToImageFilter.Update()
#scale and shift
scale = vtkImageShiftScale()
scale.SetOutputScalarTypeToUnsignedChar()
scale.SetInputConnection(windowToImageFilter.GetOutputPort())
scale.SetShift(0)
scale.SetScale(-255)
#output
writer = vtkBMPWriter()
writer.SetFileName(path)
writer.SetInputConnection(scale.GetOutputPort())
writer.Write()
def create_single_legend_actor(color, line_style):
points = vtk.vtkPoints()
raw_points = [
[0, 0],
[1, 0],
[0, 0.25],
[1, 0.25],
[0, 0.5],
[1, 0.5],
[0, 0.75],
[1, 0.75],
[0, 1],
[1, 1],
[0.5, 1],
[0.5, 0]
]
for point in raw_points:
points.InsertNextPoint([ point[1], point[0], 1.0 ])
p1 = [
[0, 2, 3],
[0, 3, 1]
]
p2 = [
[2, 4, 5],
[2, 5, 3]
]
p3 = [
[4, 6, 7],
[4, 7, 5]
]
p4 = [
[6, 8, 9],
[6, 9, 7]
]
triangles_raw = [
[0, 10, 11],
[0, 9, 10]
]
triangles_raw += p1 + p2 + p3 + p4
if line_style == 0xF0F0:
triangles_raw = p1 + p3
elif line_style == 0xFF00:
triangles_raw = p1 + p2
elif line_style == 0x000F:
triangles_raw = p4
triangles = vtk.vtkCellArray()
for t in triangles_raw:
triangle = vtk.vtkTriangle()
triangle.GetPointIds().SetId(0, t[0])
triangle.GetPointIds().SetId(1, t[1])
triangle.GetPointIds().SetId(2, t[2])
triangles.InsertNextCell(triangle)
polydata = vtk.vtkPolyData()
polydata.SetPoints(points)
polydata.SetPolys(triangles)
return polydata
def add_triangle(self, neighbors, color, center=None, opacity=0.4,
draw_edges=False, edges_color=[0.0, 0.0, 0.0],
edges_linewidth=2):
"""
Adds a triangular surface between three atoms.
Args:
atoms: Atoms between which a triangle will be drawn.
color: Color for triangle as RGB.
center: The "central atom" of the triangle
opacity: opacity of the triangle
draw_edges: If set to True, the a line will be drawn at each edge
edges_color: Color of the line for the edges
edges_linewidth: Width of the line drawn for the edges
"""
points = vtk.vtkPoints()
triangle = vtk.vtkTriangle()
for ii in range(3):
points.InsertNextPoint(neighbors[ii].x, neighbors[ii].y,
neighbors[ii].z)
triangle.GetPointIds().SetId(ii, ii)
triangles = vtk.vtkCellArray()
triangles.InsertNextCell(triangle)
# polydata object
trianglePolyData = vtk.vtkPolyData()
trianglePolyData.SetPoints(points)
trianglePolyData.SetPolys(triangles)
# mapper
mapper = vtk.vtkPolyDataMapper()
mapper.SetInput(trianglePolyData)
ac = vtk.vtkActor()
ac.SetMapper(mapper)
ac.GetProperty().SetOpacity(opacity)
if color == 'element':
if center is None:
raise ValueError(
'Color should be chosen according to the central atom, '
'and central atom is not provided')
# If partial occupations are involved, the color of the specie with
# the highest occupation is used
myoccu = 0.0
for specie, occu in center.species.items():
if occu > myoccu:
myspecie = specie
myoccu = occu
color = [i / 255 for i in self.el_color_mapping[myspecie.symbol]]
ac.GetProperty().SetColor(color)
else:
ac.GetProperty().SetColor(color)
if draw_edges:
ac.GetProperty().SetEdgeColor(edges_color)
ac.GetProperty().SetLineWidth(edges_linewidth)
ac.GetProperty().EdgeVisibilityOn()
self.ren.AddActor(ac)
def add_triangle(self, neighbors, color, center=None, opacity=0.4,
draw_edges=False, edges_color=[0.0, 0.0, 0.0],
edges_linewidth=2):
"""
Adds a triangular surface between three atoms.
Args:
atoms: Atoms between which a triangle will be drawn.
color: Color for triangle as RGB.
center: The "central atom" of the triangle
opacity: opacity of the triangle
draw_edges: If set to True, the a line will be drawn at each edge
edges_color: Color of the line for the edges
edges_linewidth: Width of the line drawn for the edges
"""
points = vtk.vtkPoints()
triangle = vtk.vtkTriangle()
for ii in range(3):
points.InsertNextPoint(neighbors[ii].x, neighbors[ii].y,
neighbors[ii].z)
triangle.GetPointIds().SetId(ii, ii)
triangles = vtk.vtkCellArray()
triangles.InsertNextCell(triangle)
# polydata object
trianglePolyData = vtk.vtkPolyData()
trianglePolyData.SetPoints( points )
trianglePolyData.SetPolys( triangles )
# mapper
mapper = vtk.vtkPolyDataMapper()
mapper.SetInput(trianglePolyData)
ac = vtk.vtkActor()
ac.SetMapper(mapper)
ac.GetProperty().SetOpacity(opacity)
if color == 'element':
if center is None:
raise ValueError(
'Color should be chosen according to the central atom, '
'and central atom is not provided')
# If partial occupations are involved, the color of the specie with
# the highest occupation is used
myoccu = 0.0
for specie, occu in center.species_and_occu.items():
if occu > myoccu:
myspecie = specie
myoccu = occu
color = [i / 255 for i in self.el_color_mapping[myspecie.symbol]]
ac.GetProperty().SetColor(color)
else:
ac.GetProperty().SetColor(color)
if draw_edges:
ac.GetProperty().SetEdgeColor(edges_color)
ac.GetProperty().SetLineWidth(edges_linewidth)
ac.GetProperty().EdgeVisibilityOn()
self.ren.AddActor(ac)
def meshToUnstructeredGrid(mesh): """Converts a FiPy mesh structure to a vtkUnstructuredGrid. Works for 2D and 3D meshes. Args: mesh (fipy.GmshImporter3D): Some Fipy mesh object. Returns: vtk.vtkUnstructuredGrid """ # Get vertex coordinates coords=mesh.vertexCoords if len(coords)==2: x,y=coords dim=2 else: x,y,z=coords dim=3 # Insert them as points points = vtk.vtkPoints() for i in range(len(x)): if dim==2: points.InsertNextPoint(x[i], y[i],0) else: points.InsertNextPoint(x[i], y[i],z[i]) # Insert tetrahedrons verts=mesh._getOrderedCellVertexIDs().T cellArray = vtk.vtkCellArray() for j,vert in enumerate(verts): if dim==3: tetra = vtk.vtkTetra() else: tetra = vtk.vtkTriangle() for i,v in enumerate(vert): tetra.GetPointIds().SetId(i, v) cellArray.InsertNextCell(tetra) # Grid grid = vtk.vtkUnstructuredGrid() grid.SetPoints(points) if dim==3: grid.SetCells(vtk.VTK_TETRA, cellArray) else: grid.SetCells(vtk.VTK_TRIANGLE, cellArray) return grid
def __init__(self):
super(Tria3, self).__init__()
self.vtk_cell = vtk.vtkTriangle()
self.point_ids = self.vtk_cell.GetPointIds()
self.nodes = None
self.center = None
self.order = None
self.id = None
def createPlaneActor2():
xsize = params.PlaneXSize
ysize = params.PlaneYSize
center = params.PlaneCenter
points = vtk.vtkPoints()
points.InsertNextPoint(
(center[0] - xsize / 2, center[1] - ysize / 2, center[2] - 0.1))
points.InsertNextPoint(
(center[0] + xsize / 2, center[1] - ysize / 2, center[2] - 0.1))
points.InsertNextPoint(
(center[0] + xsize / 2, center[1] + ysize / 2, center[2] - 0.1))
points.InsertNextPoint(
(center[0] - xsize / 2, center[1] + ysize / 2, center[2] - 0.1))
triangle = vtk.vtkTriangle()
triangle.GetPointIds().SetId(0, 0)
triangle.GetPointIds().SetId(1, 1)
triangle.GetPointIds().SetId(2, 2)
triangle2 = vtk.vtkTriangle()
triangle2.GetPointIds().SetId(0, 2)
triangle2.GetPointIds().SetId(1, 3)
triangle2.GetPointIds().SetId(2, 0)
triangles = vtk.vtkCellArray()
triangles.InsertNextCell(triangle)
triangles.InsertNextCell(triangle2)
colors = vtk.vtkUnsignedCharArray()
colors.SetNumberOfComponents(3)
colors.SetName("Colors")
colors.InsertNextTuple3(255, 0, 0)
colors.InsertNextTuple3(0, 255, 0)
colors.InsertNextTuple3(0, 0, 255)
colors.InsertNextTuple3(0, 255, 0)
trianglePolyData = vtk.vtkPolyData()
trianglePolyData.SetPoints(points)
trianglePolyData.SetPolys(triangles)
trianglePolyData.GetPointData().SetScalars(colors)
return build_actor(trianglePolyData, True)
def AddTriangle(p1, p2, p3):
Draw.vtkpoints.InsertNextPoint(*p1)
Draw.vtkpoints.InsertNextPoint(*p2)
Draw.vtkpoints.InsertNextPoint(*p3)
Draw.top += 3
triangle = vtk.vtkTriangle()
triangle.GetPointIds().SetId(0, Draw.top - 1)
triangle.GetPointIds().SetId(1, Draw.top - 2)
triangle.GetPointIds().SetId(2, Draw.top - 3)
Draw.vtktriangles.InsertNextCell(triangle)
def meshToUnstructeredGrid(mesh):
"""Converts a FiPy mesh structure to a vtkUnstructuredGrid.
Works for 2D and 3D meshes.
Args:
mesh (fipy.GmshImporter3D): Some Fipy mesh object.
Returns:
vtk.vtkUnstructuredGrid
"""
# Get vertex coordinates
coords = mesh.vertexCoords
if len(coords) == 2:
x, y = coords
dim = 2
else:
x, y, z = coords
dim = 3
# Insert them as points
points = vtk.vtkPoints()
for i in range(len(x)):
if dim == 2:
points.InsertNextPoint(x[i], y[i], 0)
else:
points.InsertNextPoint(x[i], y[i], z[i])
# Insert tetrahedrons
verts = mesh._getOrderedCellVertexIDs().T
cellArray = vtk.vtkCellArray()
for j, vert in enumerate(verts):
if dim == 3:
tetra = vtk.vtkTetra()
else:
tetra = vtk.vtkTriangle()
for i, v in enumerate(vert):
tetra.GetPointIds().SetId(i, v)
cellArray.InsertNextCell(tetra)
# Grid
grid = vtk.vtkUnstructuredGrid()
grid.SetPoints(points)
if dim == 3:
grid.SetCells(vtk.VTK_TETRA, cellArray)
else:
grid.SetCells(vtk.VTK_TRIANGLE, cellArray)
return grid
def trim_mesh_with_cone(mesh, cone_point, cone_normal, cone_radius):
"""
returns a mesh that contains only the triangles that where inside of the cone
"""
cone_end = cone_point + cone_normal*100.0
sq_radius = cone_radius*cone_radius
w = cone_point
v = cone_end
n = w - v
v_w_sq_len = dist2(v, w)
points = mesh.GetPoints().GetData()
cell_array = mesh.GetPolys()
polygons = cell_array.GetData()
triangles = vtk.vtkCellArray()
for i in xrange(0, cell_array.GetNumberOfCells()):
triangle = [polygons.GetValue(j) for j in xrange(i*4+1, i*4+4)]
p = points.GetTuple(triangle[0])
delta = p - (v + (((p - v).dot(n)) / v_w_sq_len) * n)
if delta.dot(delta) > sq_radius:
continue
p = points.GetTuple(triangle[1])
delta = p - (v + (((p - v).dot(n)) / v_w_sq_len) * n)
if delta.dot(delta) > sq_radius:
continue
p = points.GetTuple(triangle[2])
delta = p - (v + (((p - v).dot(n)) / v_w_sq_len) * n)
if delta.dot(delta) > sq_radius:
continue
cell = vtk.vtkTriangle()
pointIds = cell.GetPointIds()
pointIds.SetId(0, triangle[0])
pointIds.SetId(1, triangle[1])
pointIds.SetId(2, triangle[2])
triangles.InsertNextCell(cell)
# Create a polydata object
trianglePolyData = vtk.vtkPolyData()
# Add the geometry and topology to the polydata
trianglePolyData.SetPoints(mesh.GetPoints())
trianglePolyData.SetPolys(triangles)
trianglePolyData.Update()
#run the clean function here to remove the points that are not used
cleanPolyData = vtk.vtkCleanPolyData()
cleanPolyData.SetInput(trianglePolyData)
cleanPolyData.Update()
trimmed_mesh = cleanPolyData.GetOutput()
return trimmed_mesh
def Vtk_cell_types():
vtk_types = [
] #(vtk_type, vtk_id, vtkCell) <= linear cell types found in VTK
vtk_types.append(("VTK_TRIANGLE", 5, vtk.vtkTriangle()))
vtk_types.append(("VTK_QUAD", 9, vtk.vtkQuad()))
vtk_types.append(("VTK_TETRA", 10, vtk.vtkTetra()))
vtk_types.append(("VTK_PYRAMID", 14, vtk.vtkPyramid()))
vtk_types.append(("VTK_WEDGE", 13, vtk.vtkWedge()))
vtk_types.append(("VTK_HEXAHEDRON", 12, vtk.vtkHexahedron()))
return vtk_types
def defineMesh(self,nodes,elements):
self._points = vtk.vtkPoints()
self._triangles = vtk.vtkCellArray()
for i in range(len(nodes)):
self._points.InsertNextPoint(nodes[i].x(),nodes[i].y(),0.)
for el in elements:
tri = vtk.vtkTriangle()
conn = el.connectivite()
for ii,n in enumerate(conn):
tri.GetPointIds().SetId(ii,n)
self._triangles.InsertNextCell(tri)
def RenderTriangleAsPolygon(points, triangleNumber): print '* * * RenderTriangle: ', triangleNumber print 'Triangle points: ', tri p_triangles.InsertNextPoint(points[0]) p_triangles.InsertNextPoint(points[1]) p_triangles.InsertNextPoint(points[2]) triangle = vtk.vtkTriangle(); triangle.GetPointIds().SetId(0, 0+(triangleNumber-1)*3); triangle.GetPointIds().SetId(1, 1+(triangleNumber-1)*3); triangle.GetPointIds().SetId(2, 2+(triangleNumber-1)*3); triangles.InsertNextCell(triangle);
def defineMesh(self, nodes, elements):
self._points = vtk.vtkPoints()
self._triangles = vtk.vtkCellArray()
for i in range(len(nodes)):
self._points.InsertNextPoint(nodes[i].x(), nodes[i].y(), 0.)
for el in elements:
tri = vtk.vtkTriangle()
conn = el.connectivite()
for ii, n in enumerate(conn):
tri.GetPointIds().SetId(ii, n)
self._triangles.InsertNextCell(tri)
def create_surface_triangles(self, simpleces):
Triangles = vtk.vtkCellArray()
Triangle = vtk.vtkTriangle()
for s in simpleces:
Triangle.GetPointIds().SetId(0, s[0])
Triangle.GetPointIds().SetId(1, s[1])
Triangle.GetPointIds().SetId(2, s[2])
Triangles.InsertNextCell(Triangle)
return Triangles
def mesh_from_arcs(arcs):
#create all of the points so they have sensible, shared indices
points = vtk.vtkPoints()
num_points_in_arc = len(arcs[0])
for i in range(0, len(arcs)):
arc = arcs[i]
assert len(arc) == num_points_in_arc, "All arcs must be the same length"
for j in range(0, len(arc)):
point = arc[j]
points.InsertNextPoint(point[0], point[1], point[2])
# Build the meshgrid manually
triangles = vtk.vtkCellArray()
for i in range(1, len(arcs)):
for j in range(0, len(arc)-1):
triangle = vtk.vtkTriangle()
pointIds = triangle.GetPointIds()
pointIds.SetId(0, i * num_points_in_arc + j)
pointIds.SetId(1, i * num_points_in_arc + j + 1)
pointIds.SetId(2, (i-1) * num_points_in_arc + j + 1)
triangles.InsertNextCell(triangle)
triangle = vtk.vtkTriangle()
pointIds = triangle.GetPointIds()
pointIds.SetId(0, i * num_points_in_arc + j)
pointIds.SetId(1, (i-1) * num_points_in_arc + j + 1)
pointIds.SetId(2, (i-1) * num_points_in_arc + j)
triangles.InsertNextCell(triangle)
# Create a polydata object
trianglePolyData = vtk.vtkPolyData()
# Add the geometry and topology to the polydata
trianglePolyData.SetPoints(points)
trianglePolyData.SetPolys(triangles)
trianglePolyData.Update()
return trianglePolyData
def to_vtk(vertices, simplices=None):
'''
Creates a VTK mesh (vtkPolyData object) from a given point set utilizing Delaunay triangulation in the first place.
Arguments:
vertices: pandas DataFrame of xyz coordinates
simplices: pandas DataFrame of simplices from Delaunay triangulation, if None basic triangulation will be performed
Returns:
polydata: vtkPolyData object which serves as input for subsequent vtk simplification / decimation operations
'''
if simplices is None:
## Delaunay
# triangulation = Delaunay(vertices.iloc[:,:2].values)
# simplices = triangulation.simplices
simplices = triangulate(vertices)
else:
simplices = simplices
## VTK polygons
# initiate points and read vertices
points = vtkPoints()
for p in vertices.values:
points.InsertNextPoint(p)
# initiate triangles and read simplices
# Unfortunately in this simple example the following lines are ambiguous.
# The first 0 is the index of the triangle vertex which is ALWAYS 0-2.
# The second 0 is the index into the point (geometry) array, so this can range from 0-(NumPoints-1)
# i.e. a more general statement is triangle->GetPointIds()->SetId(0, PointId);
triangle = vtkTriangle()
triangles = vtkCellArray()
for i in simplices.values:
triangle.GetPointIds().SetId(0, i[0])
triangle.GetPointIds().SetId(1, i[1])
triangle.GetPointIds().SetId(2, i[2])
triangles.InsertNextCell(triangle)
# combine in PolyData object
polydata = vtkPolyData()
polydata.SetPoints(points)
polydata.SetPolys(triangles)
# check
polydata.Modified()
return polydata
def vtk_cells(t):
""" Creates vtkCells from an numpy array """
cellArray = vtk.vtkCellArray()
for vert in t:
if t.shape[1] == 2:
tetra = vtk.vtkLine()
if t.shape[1] == 3:
tetra = vtk.vtkTriangle()
elif t.shape[1] == 4:
tetra = vtk.vtkTetra()
for i, v in enumerate(vert):
tetra.GetPointIds().SetId(i, int(v))
cellArray.InsertNextCell(tetra)
return cellArray
def CalculateManifold(polydata, resolution=1000):
#Get Vertex and Face Array
nPoints = polydata.GetNumberOfPoints()
nFaces = polydata.GetNumberOfCells()
v = []
f = []
for i in range(nPoints):
v.append(polydata.GetPoint(i))
for i in range(nFaces):
cell = polydata.GetCell(i)
cell.GetPointId(0)
f.append([cell.GetPointId(0), cell.GetPointId(1), cell.GetPointId(2)])
v = np.array(v)
f = np.array(f)
#Calculate
calculated = lib.Calculate(v.ctypes.data_as(POINTER(c_double)), v.size,
f.ctypes.data_as(POINTER(c_int)), f.size,
c_int(resolution))
vertices = np.array(calculated['vertices'])
vertices = vertices.reshape(int(vertices.size / 3), 3)
faces = np.array(calculated['faces'])
faces = faces.reshape(int(faces.size / 3), 3)
result = vtk.vtkPolyData()
points = vtk.vtkPoints()
points.SetNumberOfPoints(vertices.shape[0])
for i in range(vertices.shape[0]):
points.SetPoint(i, vertices[i])
result.SetPoints(points)
cells = vtk.vtkCellArray()
for i in range(faces.shape[0]):
cell = vtk.vtkTriangle()
cell.GetPointIds().SetId(0, faces[i][0])
cell.GetPointIds().SetId(1, faces[i][1])
cell.GetPointIds().SetId(2, faces[i][2])
cells.InsertNextCell(cell)
result.SetPolys(cells)
return result
def interpolate(self, x, y, z):
aCell = vtk.vtkTriangle()
pcoords = [0, 0, 0]
weights = [0, 0, 0]
cid = self.loc.FindCell((x, y, z))
if cid > -1:
aCell = self.pd2.GetCell(cid)
pts = [(aCell.GetPoints().GetPoint(k)[0],
aCell.GetPoints().GetPoint(k)[1]) for k in range(3)]
res = aCell.BarycentricCoords((x, y), pts[0], pts[1], pts[2],
pcoords)
v = [self.values[aCell.GetPointId(k)] for k in range(3)]
return sum([pcoords[kk] * v[kk] for kk in range(3)])
def _polydata(self, inflated=False):
""" Compute a vtk polydata of the TriSurface.
This code uses vtk.
Parameters
----------
inflated: bool (optional, default False)
If True use the inflated vertices.
Returns
-------
polydata: vtkPolyData
the TriSurface vtk polydata.
"""
import vtk
# Select the vertices to use
labels = copy.deepcopy(self.labels)
if inflated:
vertices = self.inflated_vertices
else:
vertices = self.vertices
# First setup points, triangles and colors.
vtk_points = vtk.vtkPoints()
vtk_triangles = vtk.vtkCellArray()
vtk_colors = vtk.vtkUnsignedCharArray()
vtk_colors.SetNumberOfComponents(1)
nb_of_labels = len(set(self.labels))
labels[numpy.where(labels < 0)] = 0
for index in range(len(vertices)):
vtk_points.InsertNextPoint(vertices[index])
vtk_colors.InsertNextTuple1(labels[index])
for triangle in self.triangles:
vtk_triangle = vtk.vtkTriangle()
vtk_triangle.GetPointIds().SetId(0, triangle[0])
vtk_triangle.GetPointIds().SetId(1, triangle[1])
vtk_triangle.GetPointIds().SetId(2, triangle[2])
vtk_triangles.InsertNextCell(vtk_triangle)
# Create (geometry and topology) the associated polydata
polydata = vtk.vtkPolyData()
polydata.SetPoints(vtk_points)
polydata.GetPointData().SetScalars(vtk_colors)
polydata.SetPolys(vtk_triangles)
return polydata
def GetVtkPoly(self, fid, fdata, n, bytesMirrored, type):
geo = []
pid = []
fill, out, trans, multi = ReadFlags(fid, fdata)
for i in range(0, n):
geo.append(ReadFloats(fid, fdata, np.float32, 3, bytesMirrored))
color, tr = ReadColorAndTrans(fid, fdata, fill, out, multi, trans, n,
bytesMirrored)
for i in range(0, n):
pid.append(self.points.InsertNextPoint(geo[i]))
if multi:
t = [color[i][0]]
self.temps.InsertNextTypedTuple(t)
col = tuple(color[i])
self.colors.InsertNextTypedTuple(col)
else:
t = [color[0][0]]
self.temps.InsertNextTypedTuple(t)
col = tuple(color[0])
self.colors.InsertNextTypedTuple(col)
if type == 'P':
return pid[0]
elif type == 'L':
line = vtk.vtkLine()
line.GetPointIds().SetId(0, pid[0])
line.GetPointIds().SetId(1, pid[1])
return line
elif type == 'T':
tri = vtk.vtkTriangle()
tri.GetPointIds().SetId(0, pid[0])
tri.GetPointIds().SetId(1, pid[1])
tri.GetPointIds().SetId(2, pid[2])
return tri
elif type == 'Q':
quad = vtk.vtkQuad()
quad.GetPointIds().SetId(0, pid[0])
quad.GetPointIds().SetId(1, pid[1])
quad.GetPointIds().SetId(2, pid[2])
quad.GetPointIds().SetId(3, pid[3])
return quad
def buildPolyData(vertices, faces=None, indexOffset=0):
'''
Build a ``vtkPolyData`` object from a list of vertices
where faces represents the connectivity of the polygonal mesh.
E.g. :
- ``vertices=[[x1,y1,z1],[x2,y2,z2], ...]``
- ``faces=[[0,1,2], [1,2,3], ...]``
Use ``indexOffset=1`` if face numbering starts from 1 instead of 0.
.. hint:: Example: `buildpolydata.py <https://github.com/marcomusy/vtkplotter/blob/master/examples/basic/buildpolydata.py>`_
.. image:: https://user-images.githubusercontent.com/32848391/51032546-bf4dac00-15a0-11e9-9e1e-035fff9c05eb.png
'''
sourcePoints = vtk.vtkPoints()
sourceVertices = vtk.vtkCellArray()
sourcePolygons = vtk.vtkCellArray()
for pt in vertices:
if len(pt) > 2:
aid = sourcePoints.InsertNextPoint(pt[0], pt[1], pt[2])
else:
aid = sourcePoints.InsertNextPoint(pt[0], pt[1], 0)
sourceVertices.InsertNextCell(1)
sourceVertices.InsertCellPoint(aid)
if faces:
for f in faces:
n = len(f)
if n == 4:
plg = vtk.vtkTetra()
elif n == 3:
plg = vtk.vtkTriangle()
else:
plg = vtk.vtkPolygon()
plg.GetPointIds().SetNumberOfIds(n)
for i in range(n):
plg.GetPointIds().SetId(i, f[i] - indexOffset)
sourcePolygons.InsertNextCell(plg)
poly = vtk.vtkPolyData()
poly.SetPoints(sourcePoints)
poly.SetVerts(sourceVertices)
if faces:
poly.SetPolys(sourcePolygons)
clp = vtk.vtkCleanPolyData()
clp.SetInputData(poly)
clp.PointMergingOn()
clp.Update()
return clp.GetOutput()
def getVtkUnstructuredGrid(self):
tPts = vtk.vtkPoints()
ugrid = vtk.vtkUnstructuredGrid()
tPts.SetNumberOfPoints(self.nodes.shape[0])
for n in np.arange(self.nodes.shape[0]):
tPts.InsertPoint(n, self.nodes[n, 0], self.nodes[n, 1],
self.nodes[n, 2])
ugrid.SetPoints(tPts)
tri = vtk.vtkTriangle()
for n in np.arange(self.cells.shape[0]):
tri.GetPointIds().SetId(0, self.cells[n, 0])
tri.GetPointIds().SetId(1, self.cells[n, 1])
tri.GetPointIds().SetId(2, self.cells[n, 2])
ugrid.InsertNextCell(tri.GetCellType(), tri.GetPointIds())
return ugrid
def initTriangles(self):
"""Sets up triangles describing mesh."""
verts = self.embryo.simulation.mesh.mesh._getOrderedCellVertexIDs().T
cellArray = vtk.vtkCellArray()
for j, vert in enumerate(verts):
tetra = vtk.vtkTriangle()
for i, v in enumerate(vert):
tetra.GetPointIds().SetId(i, v)
cellArray.InsertNextCell(tetra)
self.grid.SetCells(vtk.VTK_TRIANGLE, cellArray)
def buildFullVTKGrid(self):
# Create the points for VTK
points = vtk.vtkPoints()
for i in range(0, len(self.mesh.coords) / 3):
p = self.mesh.coords[(i * 3):(i * 3 + 3)]
points.InsertNextPoint(p)
#add the points and cells to unstructured grid
vtkgrid = vtk.vtkUnstructuredGrid()
vtkgrid.SetPoints(points)
#add the VTK elements to the mesh
for element in self.mesh.elements:
type = element.getType()
nodes = element.nodes
cell = vtk.vtkTriangle()
if type == eTypes.TRI:
cell = vtk.vtkTriangle()
elif type == eTypes.QUAD:
cell = vtk.vtkQuad()
elif type == eTypes.TET:
cell = vtk.vtkTetra()
elif type == eTypes.PYRAMID:
cell = vtk.vtkPyramid()
elif type == eTypes.PRISM:
cell = vtk.vtkWedge() #prism
elif type == eTypes.HEX:
cell = vtk.vtkHexahedron()
else:
raise # throw an exception
j = 0
for n in nodes:
cell.GetPointIds().SetId(j, n)
j = j + 1
vtkgrid.InsertNextCell(cell.GetCellType(), cell.GetPointIds())
return vtkgrid
def vtk_cells(t):
""" creates vtkCells from an numpy array @param t,
currently vtkLine, vtkTriangle, andn vtkTetra are implemented"""
cellArray = vtk.vtkCellArray()
for vert in t:
if t.shape[1] == 2:
tetra = vtk.vtkLine()
if t.shape[1] == 3:
tetra = vtk.vtkTriangle()
elif t.shape[1] == 4:
tetra = vtk.vtkTetra()
for i, v in enumerate(vert):
tetra.GetPointIds().SetId(i, int(v))
cellArray.InsertNextCell(tetra)
return cellArray
def buildFullVTKGrid(self):
# Create the points for VTK
points = vtk.vtkPoints()
for i in range(0, len(self.mesh.coords)/3):
p = self.mesh.coords[(i*3):(i*3+3)]
points.InsertNextPoint(p)
#add the points and cells to unstructured grid
vtkgrid = vtk.vtkUnstructuredGrid()
vtkgrid.SetPoints(points)
#add the VTK elements to the mesh
for element in self.mesh.elements:
type = element.getType()
nodes = element.nodes
cell = vtk.vtkTriangle()
if type == eTypes.TRI:
cell = vtk.vtkTriangle()
elif type == eTypes.QUAD:
cell = vtk.vtkQuad()
elif type == eTypes.TET:
cell = vtk.vtkTetra()
elif type == eTypes.PYRAMID:
cell = vtk.vtkPyramid()
elif type == eTypes.PRISM:
cell = vtk.vtkWedge() #prism
elif type == eTypes.HEX:
cell = vtk.vtkHexahedron()
else:
raise # throw an exception
j = 0
for n in nodes:
cell.GetPointIds().SetId(j,n)
j = j+1
vtkgrid.InsertNextCell(cell.GetCellType(), cell.GetPointIds())
return vtkgrid
def getVtkUnstructuredGrid(self):
tPts = vtk.vtkPoints()
ugrid = vtk.vtkUnstructuredGrid()
tPts.SetNumberOfPoints(self.nodes.shape[0])
for n in np.arange(self.nodes.shape[0]):
tPts.InsertPoint(n, self.nodes[n,0], self.nodes[n,1], self.nodes[n,2])
ugrid.SetPoints(tPts)
tri = vtk.vtkTriangle()
for n in np.arange(self.cells.shape[0]):
tri.GetPointIds().SetId(0, self.cells[n,0])
tri.GetPointIds().SetId(1, self.cells[n,1])
tri.GetPointIds().SetId(2, self.cells[n,2])
ugrid.InsertNextCell( tri.GetCellType(), tri.GetPointIds() )
return ugrid
def _polydata(self, inflated=False):
""" Compute a vtk polydata of the TriSurface.
This code uses vtk.
Parameters
----------
inflated: bool (optional, default False)
If True use the inflated vertices.
Returns
-------
polydata: vtkPolyData
the TriSurface vtk polydata.
"""
# Import here since vtk is not required by the package
import vtk
# Select the vertices to use
labels = copy.deepcopy(self.labels)
if inflated:
vertices = self.inflated_vertices
else:
vertices = self.vertices
# First setup points, triangles and colors.
vtk_points = vtk.vtkPoints()
vtk_triangles = vtk.vtkCellArray()
vtk_colors = vtk.vtkUnsignedCharArray()
vtk_colors.SetNumberOfComponents(1)
labels[numpy.where(labels < 0)] = 0
for index in range(len(vertices)):
vtk_points.InsertNextPoint(vertices[index])
vtk_colors.InsertNextTuple1(labels[index])
for triangle in self.triangles:
vtk_triangle = vtk.vtkTriangle()
vtk_triangle.GetPointIds().SetId(0, triangle[0])
vtk_triangle.GetPointIds().SetId(1, triangle[1])
vtk_triangle.GetPointIds().SetId(2, triangle[2])
vtk_triangles.InsertNextCell(vtk_triangle)
# Create (geometry and topology) the associated polydata
polydata = vtk.vtkPolyData()
polydata.SetPoints(vtk_points)
polydata.GetPointData().SetScalars(vtk_colors)
polydata.SetPolys(vtk_triangles)
return polydata
def unstructuredgrid( self, points, npars=None ):
"""add unstructured grid"""
points = _nansplit( points )
#assert isinstance( points, (list,tuple,numpy.ndarray) ), 'Expected list of point arrays'
import vtk
vtkPoints = vtk.vtkPoints()
vtkPoints.SetNumberOfPoints( sum(pts.shape[0] for pts in points) )
cnt = 0
for pts in points:
np, ndims = pts.shape
if not npars:
npars = ndims
vtkelem = None
if np == 2:
vtkelem = vtk.vtkLine()
elif np == 3:
vtkelem = vtk.vtkTriangle()
elif np == 4:
if npars == 2:
vtkelem = vtk.vtkQuad()
elif npars == 3:
vtkelem = vtk.vtkTetra()
elif np == 8:
vtkelem = vtk.vtkVoxel() # TODO hexahedron for not rectilinear NOTE ordering changes!
if not vtkelem:
raise Exception( 'not sure what to do with cells with ndims=%d and npoints=%d' % (ndims,np) )
if ndims < 3:
pts = numpy.concatenate([pts,numpy.zeros(shape=(pts.shape[0],3-ndims))],axis=1)
cellpoints = vtkelem.GetPointIds()
for i,point in enumerate(pts):
vtkPoints .SetPoint( cnt, point )
cellpoints.SetId( i, cnt )
cnt +=1
self.vtkMesh.InsertNextCell( vtkelem.GetCellType(), cellpoints )
self.vtkMesh.SetPoints( vtkPoints )
def initTriangles(self): """Sets up triangles describing mesh.""" verts=self.embryo.simulation.mesh.mesh._getOrderedCellVertexIDs().T cellArray = vtk.vtkCellArray() for j,vert in enumerate(verts): tetra = vtk.vtkTriangle() for i,v in enumerate(vert): tetra.GetPointIds().SetId(i, v) cellArray.InsertNextCell(tetra) self.grid.SetCells(vtk.VTK_TRIANGLE, cellArray)
def create_actor_tri(pts, tris, color, **kwargs):
""" Creates a VTK actor for rendering triangulated surface plots.
:param pts: points
:type pts: vtkFloatArray
:param tris: list of triangle indices
:type tris: ndarray
:param color: actor color
:type color: list
:return: a VTK actor
:rtype: vtkActor
"""
# Keyword arguments
array_name = kwargs.get('name', "")
array_index = kwargs.get('index', 0)
# Create points
points = vtk.vtkPoints()
points.SetData(pts)
# Create triangles
triangles = vtk.vtkCellArray()
for tri in tris:
tmp = vtk.vtkTriangle()
for i, v in enumerate(tri):
tmp.GetPointIds().SetId(i, v)
triangles.InsertNextCell(tmp)
# Create a PolyData object and add points & triangles
polydata = vtk.vtkPolyData()
polydata.SetPoints(points)
polydata.SetPolys(triangles)
# Map poly data to the graphics primitives
mapper = vtk.vtkPolyDataMapper()
mapper.SetInputDataObject(polydata)
mapper.SetArrayName(array_name)
mapper.SetArrayId(array_index)
# Create an actor and set its properties
actor = vtk.vtkActor()
actor.SetMapper(mapper)
actor.GetProperty().SetColor(*color)
# Return the actor
return actor
def buildPartialVTKGrid(self, factag):
#get points required for factag
pointsList = self.getPointsWithFactag(factag)
#create a lookup table so we can map the
#cells from the global list to a local list
points = vtk.vtkPoints()
localIdx = 0
ptMap = {}
for pt in pointsList:
ptMap[int(pt)] = localIdx
localIdx = localIdx + 1
p = self.mesh.coords[(pt*3):(pt*3+3)]
points.InsertNextPoint(p)
vtkgrid = vtk.vtkUnstructuredGrid()
vtkgrid.SetPoints(points)
#get elements that have desired factag
felements = self.getElementsWithFactag(factag)
#build the vtk elements
for element in felements:
type = element.getType()
nodes = element.nodes
if type == eTypes.TRI:
cell = vtk.vtkTriangle()
elif type == eTypes.QUAD:
cell = vtk.vtkQuad()
elif type == eTypes.TET:
cell = vtk.vtkTetra()
elif type == eTypes.PYRAMID:
cell = vtk.vtkPyramid()
elif type == eTypes.PRISM:
cell = vtk.vtkWedge() #prism
elif type == eTypes.HEX:
cell = vtk.vtkHexahedron()
else:
raise # throw an exception
j = 0
for n in nodes:
localId = ptMap[int(n)]
cell.GetPointIds().SetId(j,localId)
j = j+1
vtkgrid.InsertNextCell(cell.GetCellType(), cell.GetPointIds())
return vtkgrid
def as_triangles(indices, cellarray, level, data):
if len(indices) >= 3:
stride = len(indices)//4
indices.append(indices[-1] + 1)
triangle = vtk.vtkTriangle()
triangle.GetPointIds().SetId(0, indices[ stride])
triangle.GetPointIds().SetId(1, indices[2*stride])
triangle.GetPointIds().SetId(2, indices[3*stride])
cellarray.InsertNextCell(triangle)
data.InsertNextValue(level)
as_triangles(indices[ 0: stride], cellarray, level + 1, data)
as_triangles(indices[ stride: 2*stride], cellarray, level + 1, data)
as_triangles(indices[2*stride: 3*stride], cellarray, level + 1, data)
as_triangles(indices[3*stride: -1], cellarray, level + 1, data)
def get_linear_cell(cell):
""" Get equivalent linear cell to vtkCell cell"""
if cell.GetCellType() in (vtk.VTK_POLY_LINE,):
linear_cell = vtk.vtkLine()
linear_cell.GetPoints().SetPoint(0, cell.GetPoints().GetPoint(0))
linear_cell.GetPoints().SetPoint(1, cell.GetPoints().GetPoint(1))
elif cell.GetCellType() in (vtk.VTK_QUADRATIC_TRIANGLE,):
linear_cell = vtk.vtkTriangle()
linear_cell.GetPoints().SetPoint(0, cell.GetPoints().GetPoint(0))
linear_cell.GetPoints().SetPoint(1, cell.GetPoints().GetPoint(1))
linear_cell.GetPoints().SetPoint(2, cell.GetPoints().GetPoint(2))
elif cell.GetCellType() in (vtk.VTK_QUADRATIC_TETRA,):
linear_cell = vtk.vtkTetra()
linear_cell.GetPoints().SetPoint(0, cell.GetPoints().GetPoint(0))
linear_cell.GetPoints().SetPoint(1, cell.GetPoints().GetPoint(1))
linear_cell.GetPoints().SetPoint(2, cell.GetPoints().GetPoint(2))
linear_cell.GetPoints().SetPoint(3, cell.GetPoints().GetPoint(3))
else:
linear_cell = cell
return linear_cell
def _create_tecplot_shells(self, is_quads, quads, is_tris, tris):
if is_quads:
elements = quads
for iface, face in enumerate(quads):
elem = vtkQuad()
epoints = elem.GetPointIds()
epoints.SetId(0, face[0])
epoints.SetId(1, face[1])
epoints.SetId(2, face[2])
epoints.SetId(3, face[3])
self.grid.InsertNextCell(elem.GetCellType(), elem.GetPointIds()) #elem.GetCellType() = 5 # vtkTriangle
#break
if is_tris:
elements = tris
for iface, face in enumerate(tris):
elem = vtkTriangle()
epoints = elem.GetPointIds()
epoints.SetId(0, face[0])
epoints.SetId(1, face[1])
epoints.SetId(2, face[2])
self.grid.InsertNextCell(5, elem.GetPointIds()) #elem.GetCellType() = 5 # vtkTriangle
def get3Dpolyactor(final_tripoints):
polys = []
for i in xrange(len(final_tripoints)/3):
poly = []
poly.append(final_tripoints[3*i])
poly.append(final_tripoints[3*i+1])
poly.append(final_tripoints[3*i+2])
polys.append(poly)
# print 'polys: ', polys
points = vtk.vtkPoints()
print 'len(tris): ', len(polys)
for p in polys:
points.InsertNextPoint(p[0])
points.InsertNextPoint(p[1])
points.InsertNextPoint(p[2])
tris = vtk.vtkCellArray()
for i in range(len(polys)):
tri = vtk.vtkTriangle()
tri.GetPointIds().SetId(0, 3*i)
tri.GetPointIds().SetId(1, 3*i+1)
tri.GetPointIds().SetId(2, 3*i+2)
tris.InsertNextCell(tri)
trisPolyData = vtk.vtkPolyData()
trisPolyData.SetPoints(points)
trisPolyData.SetPolys(tris)
mapper = vtk.vtkPolyDataMapper()
if vtk.VTK_MAJOR_VERSION <= 5:
mapper.SetInput(trisPolyData)
else:
mapper.SetInputData(trisPolyData)
actor = vtk.vtkActor()
actor.SetMapper(mapper)
return actor
def CreateCrossSectionPolyDataFromFile(file):
with open(file, 'r') as f:
read_data = f.read()
tokens = string.split(read_data)
numPts = int(tokens[0])
numCells = int(tokens[1])
print numPts, numCells
newPoints = vtk.vtkPoints()
newPoints.SetNumberOfPoints(numPts)
offset = 2
for ptId in xrange(numPts):
x = float(tokens[ptId*3 + 0 + offset])
y = float(tokens[ptId*3 + 1 + offset])
z = float(tokens[ptId*3 + 2 + offset])
newPoints.SetPoint(ptId, x, y, z)
output = vtk.vtkPolyData()
output.SetPoints(newPoints)
output.Allocate(3*numCells)
offset = 2 + 3*numPts
triangle = vtk.vtkTriangle()
pointIds = triangle.GetPointIds()
pointIds.SetNumberOfIds(3)
for cellId in xrange(numCells):
for i in xrange(3):
pointIds.SetId(i, int(tokens[cellId*3 + i + offset]))
output.InsertNextCell(triangle.GetCellType(), pointIds)
return output
def renderClusterFacets(self, clusterSize, clusterPos, lattice, neighbourRadius, appendPolyData):
"""
Render facets of a cluster.
"""
# get facets
facets = clusters.findConvexHullFacets(clusterSize, clusterPos)
# now render
if facets is not None:
# TODO: make sure not facets more than neighbour rad from cell
facets = clusters.checkFacetsPBCs(facets, clusterPos, 2.0 * neighbourRadius, lattice.PBC, lattice.cellDims)
# create vtk points from cluster positions
points = vtk.vtkPoints()
for i in xrange(clusterSize):
points.InsertNextPoint(clusterPos[3 * i], clusterPos[3 * i + 1], clusterPos[3 * i + 2])
# create triangles
triangles = vtk.vtkCellArray()
for facet in facets:
triangle = vtk.vtkTriangle()
for j in xrange(3):
triangle.GetPointIds().SetId(j, facet[j])
triangles.InsertNextCell(triangle)
# polydata object
trianglePolyData = vtk.vtkPolyData()
trianglePolyData.SetPoints(points)
trianglePolyData.SetPolys(triangles)
# add polydata
if vtk.vtkVersion.GetVTKMajorVersion() <= 5:
appendPolyData.AddInputConnection(trianglePolyData.GetProducerPort())
else:
appendPolyData.AddInputData(trianglePolyData)
