def runTime(self, key):
secs = [str(i) for i in range(10)]
if key not in secs: return
printc('Will execute score for ' + key + ' seconds')
self.vp.interactive = False
self.vp.clock = int(key)
self.vp.interactor.ExitCallback()
def onkeypress(
self,
evt): ###################################### MORPH & GENERATE
if evt.keyPressed == 'm': ##--------- morph mesh1 based on the existing arrows
if len(self.arrow_starts) != len(self.arrow_stops):
printc("You must select your end point first!", c='y')
return
output = [self.mesh1.clone().c('grey4'), self.mesh2, self.msg2]
warped_plane = self.plane1.clone().pickable(False)
warped_plane.warp(self.arrow_starts,
self.arrow_stops,
mode=self.mode)
output.append(warped_plane +
Axes(warped_plane, xyGrid=0, textScale=0.6))
mw = self.mesh1.clone().applyTransform(
warped_plane.transform).c('red4')
output.append(mw)
T_inv = warped_plane.transform.GetInverse()
a = Points(self.arrow_starts,
r=10).applyTransform(warped_plane.transform)
b = Points(self.arrow_stops,
r=10).applyTransform(warped_plane.transform)
self.dottedln = Lines(
a, b, res=self.n).applyTransform(T_inv).pointSize(5)
output.append(self.dottedln)
self.msg1.text(self.instructions)
self.msg2.text("Morphed output:")
self.plotter.clear(at=1).addRendererFrame().add(output, at=1)
elif evt.keyPressed == 'g': ##------- generate intermediate shapes
if not self.dottedln:
return
intermediates = []
allpts = self.dottedln.points()
allpts = allpts.reshape(len(self.arrow_starts), self.n + 1, 3)
for i in range(self.n + 1):
pi = allpts[:, i, :]
m_nterp = self.mesh1.clone().warp(self.arrow_starts,
pi,
mode=self.mode).c('b3').lw(1)
intermediates.append(m_nterp)
self.msg2.text("Morphed output + Interpolation:")
self.plotter.add(intermediates, at=1)
self.dottedln = None
elif evt.keyPressed == 'c': ##------- clear all
self.arrow_starts = []
self.arrow_stops = []
self.toggle = False
self.dottedln = None
self.msg1.text(self.instructions)
self.msg2.text("[output will show here]")
self.plotter.clear(at=0).clear(at=1).addRendererFrame()
self.plotter.add([self.plane1, self.msg1, self.mesh1, self.mesh2],
at=0)
self.plotter.add([self.plane2, self.msg2], at=1)
def PauseButtonFunc(self):
vedo.printc(self.PauseButton.status(), box="_", dim=True)
if self.PauseButton.status() == "PAUSE":
self.Plot.interactive = True
else:
self.Plot.interactive = False
self.PauseButton.switch() # change to next status
def _func(self, pars):
shift = np.array(np.split(pars, 2)).T # recreate the shift vectors
z = np.zeros((self.npts, 1))
shift = np.append(shift, z, axis=1) # make them 3d
self.morphed_source = self.source.clone().warp(self.ptsource,
self.ptsource + shift,
sigma=self.sigma,
mode="2d")
d = self.morphed_source.points() - self.target.points()
chi2 = np.sum(np.multiply(d, d)) #/len(d)
if chi2 < self.chi2:
printc("new minimum ->", chi2)
self.chi2 = chi2
return chi2
def animation(coord, connect, amp, disp_vector):
""" Plot deformed mesh animation.
Args:
coord (:obj:`numpy.array`): Coordinates of the element.
connect (:obj:`numpy.array`): Element connectivity.
amp (:obj:`int`): Amplitude.
disp_vector (:obj:`numpy.array`): Displacement.
"""
vt.printc("Press F1 to exit.", c="red", invert=1)
vp = vt.Plotter(axes=0, interactive=0)
vp += __doc__
ind_faces_U = free_faces(coord, connect)
aux = np.linspace(-1, 1, num=400)
factor = amp * np.sin(aux * 2 * np.pi)
while True:
for f in factor:
coord3D_U = fc.apply_U(disp_vector, coord, factor=f)
verts_U = coord3D_U[:, 1:]
mesh = build_mesh(verts_U, ind_faces_U)
vp.clear()
vp.add(mesh)
vp.show()
def demo3d_hanoi(**kwargs):
nr_disks = kwargs.get("nr_disks", 5)
interactive = kwargs.get("interactive", 1)
hanoi = Hanoi(nr_disks)
tower_states = list([hanoi.towers])
for _ in hanoi.moves():
tower_states.append(hanoi.towers)
vp = Plotter(axes=0, interactive=0, bg="w", size=(800, 600))
vp.camera.SetPosition([18.5, -20.7, 7.93])
vp.camera.SetFocalPoint([3.0, 0.0, 2.5])
vp.camera.SetViewUp([-0.1, +0.17, 0.977])
cols = makePalette("red", "blue", hanoi.nr_disks + 1, hsv=True)
disks = {
hanoi.nr_disks - i: Cylinder(pos=[0, 0, 0],
r=0.2 * (hanoi.nr_disks - i + 1),
c=cols[i])
for i in range(hanoi.nr_disks)
}
for k in disks:
vp += disks[k]
vp += Box(pos=(3.0, 0, -.5), length=12.0, width=4.0, height=0.1)
vp.show(zoom=1.2)
printc("\n Press q to continue, Esc to exit. ", c="y", invert=1)
pb = ProgressBar(0, len(tower_states), 1, c="b", ETA=False)
for t in pb.range():
pb.print()
state = tower_states[t]
for tower_nr in range(3):
for i, disk in enumerate(state[tower_nr]):
disks[disk].pos([3 * tower_nr, 0, i + 0.5])
vp.show(resetcam=0, interactive=interactive, rate=10)
vp.show(resetcam=0, interactive=1)
def play(self):
printc('Press space to proceed by one note', c=1)
printc('Press Esc to exit.', c=1)
if self.rightHand:
self.engagedkeysR = [False] * len(self.rightHand.noteseq)
self.engagedfingersR = [False] * 6 # element 0 is dummy
if self.leftHand:
self.engagedkeysL = [False] * len(self.leftHand.noteseq)
self.engagedfingersL = [False] * 6
t = 0.0
while True:
if self.rightHand: self._moveHand(1, t)
if self.leftHand: self._moveHand(-1, t)
if t > 1000: break
t += self.dt # absolute time flows
if self.verbose: printc('End of note sequence reached.')
self.vp.keyPressFunction = None # disable observer
def onKeypress(self, evt):
printc("You have pressed key:", evt.keyPressed, c='b')
if evt.keyPressed == 'q':
self.vp.close()
self.vtkWidget.close()
exit()
def _moveHand(self, side, t): ############# runs inside play() loop
if side == 1:
c1, c2 = 'tomato', 'orange'
engagedkeys = self.engagedkeysR
engagedfingers = self.engagedfingersR
H = self.rightHand
vpH = self.vpRH
else:
c1, c2 = 'purple', 'mediumpurple'
engagedkeys = self.engagedkeysL
engagedfingers = self.engagedfingersL
H = self.leftHand
vpH = self.vpLH
for i, n in enumerate(H.noteseq): #####################
start, stop, f = n.time, n.time + n.duration, n.fingering
if isinstance(f, str): continue
if f and stop <= t <= stop + self.dt and engagedkeys[
i]: #release key
engagedkeys[i] = False
engagedfingers[f] = False
name = nameof(n)
krelease(self.KB[name])
frelease(vpH[f])
if hasattr(self.vp, 'interactor'):
self.vp.render()
for i, n in enumerate(H.noteseq): #####################
start, stop, f = n.time, n.time + n.duration, n.fingering
if isinstance(f, str):
print('Warning: cannot understand lyrics:', f, 'skip note', i)
continue
if f and start <= t < stop and not engagedkeys[
i] and not engagedfingers[f]:
# press key
if i >= len(H.fingerseq): return
engagedkeys[i] = True
engagedfingers[f] = True
name = nameof(n)
if t > self.t0 + self.vp.clock:
self.t0 = t
self.vp.show(interactive=False, resetcam=False)
for g in [1, 2, 3, 4, 5]:
vpH[g].x(side * H.fingerseq[i][g])
vpH[0].x(vpH[3].x()
) # index 0 is arm, put it where middle finger is
fpress(vpH[f], c1)
kpress(self.KB[name], c2)
if self.verbose:
msg = 'meas.' + str(n.measure) + ' t=' + str(round(t, 2))
if side == 1:
printc(msg, '\t\t\t\tRH.finger', f, 'hit', name, c='b')
else:
printc(msg, '\tLH.finger', f, 'hit', name, c='m')
if self.playsounds:
self.vp.show(interactive=False, resetcam=False)
playSound(n, self.speedfactor, wait=True)
if hasattr(self.vp, 'interactor'):
self.vp.interactor.Start()
else:
self.vp.show(interactive=1, resetcam=0)
pl = Plane(mesh.centroid, normal=[0, 0, 1], sx=6, sy=4, alpha=0.3)
slice_2D, to_3D = mslice.to_planar()
# show objects on N=2 non-synced renderers:
show([(mesh, pl), (slice_2D, txt)], N=2, sharecam=False, axes=True)
# if we wanted to take a bunch of parallel slices, like for a 3D printer
# we can do that easily with the section_multiplane method
# we're going to slice the mesh into evenly spaced chunks along z
# this takes the (2,3) bounding box and slices it into [minz, maxz]
z_extents = mesh.bounds[:, 2]
# slice every .125 model units (eg, inches)
z_levels = np.arange(*z_extents, step=0.125)
# find a bunch of parallel cross sections
sections = mesh.section_multiplane(plane_origin=mesh.bounds[0],
plane_normal=[0, 0, 1],
heights=z_levels)
N = len(sections)
printc("nr. of sections:", N, c='green')
# summing the array of Path2D objects will put all of the curves
# into one Path2D object, which we can plot easily
combined = np.sum(sections)
sections.append([combined, 'combined'])
# show objects in N synced renderers:
show(sections, N=N, axes=True, newPlotter=True)
"""Manually build a mesh from points and faces"""
from vedo import Mesh, printc, show
verts = [(50,50,50), (70,40,50), (50,40,80), (80,70,50)]
faces = [(0,1,2), (2,1,3), (1,0,3)]
# (the first triangle face is formed by vertex 0, 1 and 2)
# Build the polygonal Mesh object:
mesh = Mesh([verts, faces])
mesh.backColor('violet').lineColor('tomato').lineWidth(2)
labs = mesh.labels('id').c('black')
# retrieve them as numpy arrays
printc('points():\n', mesh.points(), c=3)
printc('faces(): \n', mesh.faces(), c=3)
show(mesh, labs, __doc__, viewup='z', axes=1).close()
Press q:
Control returns to terminal,
window will not close but become unresponsive"""
from vedo import Paraboloid, Hyperboloid, Plotter, show, printc
mesh = Paraboloid()
vp1 = show(mesh, __doc__, title='First Plotter instance')
# Now press 'q' to exit the window interaction,
# windows stays open but not reactive anymore.
# You can go back to interavtion mode by simply calling:
#show()
printc('\nControl returned to terminal shell:', c='tomato', invert=1)
printc('window is now unresponsive (press Enter here)', c='tomato', invert=1)
input()
vp1.closeWindow()
# window should now close, the Plotter instance becomes unusable
# but mesh objects still exist in it:
printc("First Plotter actors:", vp1.actors, '\n press enter again')
vp1.show() # THIS HAS NO EFFECT: window does not exist anymore. Cannot reopen.
##################################################################
# Can now create a brand new Plotter and show the old object in it
vp2 = Plotter(title='Second Plotter instance', pos=(500, 0))
vp2.show(vp1.actors[0].color('red'))
'''
compute_collision() will compute the collision of all the entities with
a Point while compute_first_collision() will always return its first entry.
Especially if a point is on an element edge this can be tricky.
You may also want to compare with the Cell.contains(Point) tool.
'''
# Script by Rudy at https://fenicsproject.discourse.group/t/
# any-function-to-determine-if-the-point-is-in-the-mesh/275/3
import dolfin
from vedo.dolfin import plot
from vedo import printc, pointcloud
n = 4
Px = 0.5
Py = 0.5
mesh = dolfin.UnitSquareMesh(n, n)
bbt = mesh.bounding_box_tree()
collisions = bbt.compute_collisions(dolfin.Point(Px, Py))
collisions1st = bbt.compute_first_entity_collision(dolfin.Point(Px, Py))
printc("collisions : ", collisions)
printc("collisions 1st: ", collisions1st)
for cell in dolfin.cells(mesh):
contains = cell.contains(dolfin.Point(Px, Py))
printc("Cell", cell.index(), "contains P:", contains, c=contains)
###########################################
pt = pointcloud.Point([Px, Py], c='blue')
plot(mesh, pt, text=__doc__)
def onEvent(event):
printc(event.name, 'happened at mouse position', event.picked2d)
"""Use iminuit to find the minimum of a 3D scalar field"""
from vedo import show, Point, Line, printc
from iminuit import Minuit
# pip install iminuit # https://github.com/scikit-hep/iminuit
import numpy as np
def fcn(x, y, z):
f = (x - 4)**4 + (y - 3)**4 + (z - 2)**2
if not vals or f < vals[-1]:
path.append([x, y, z])
vals.append(f)
return f
paths = []
for x, y, z in np.random.rand(200, 3) * 3:
path, vals = [], []
m = Minuit(fcn, x=x, y=y, z=z)
m.errordef = m.LEAST_SQUARES
# m.simplex() # run simplex optimiser
m.migrad() # run migrad optimiser
line = Line(path).cmap('jet_r', vals).lw(2).alpha(0.25)
paths.append(line)
printc('Last optimization output:', c='green7', invert=1)
printc(m, c='green7', italic=1)
show(paths, Point([4, 3, 2]), __doc__, axes=1)
def buttonfunc():
mesh.alpha(1 - mesh.alpha()) # toggle mesh transparency
bu.switch() # change to next status
printc(bu.status(), box="_", dim=True)
def onMouseClick(self, evt):
printc("You have clicked your mouse button. Event info:\n", evt, c='y')
def onKeypress(self, evt):
printc("You have pressed key:", evt.keyPressed, c='b')
"""Non blocking interactive rendering window,
python flow is not blocked
but displayed objects cannot be accessed"""
import time, os
from multiprocessing import Process
from vedo import Sphere, show, printc
printc("..starting main", c='g')
sphere = Sphere().alpha(0.1).lw(0.1)
# ------ instead of (typical):
#show(sphere, __doc__, axes=1)
# ------ spawn an independent subprocess:
def spawn():
show(sphere, __doc__, axes=1)
Process(target=spawn).start()
printc("..python flow is not blocked, wait 1 sec..", c='y')
time.sleep(1)
printc("..continuing in main", c='r')
os._exit(0) # this exits immediately with no cleanup or buffer flushing
def onClick(self):
printc("..calling onClick")
self.vp.actors[0].color('red').rotateZ(40)
self.vp.interactor.Render()
txt = Text2D('..' + data.filename[-30:], font='MonospaceTypewriter')
plt.show(vol, msh, sb, box, txt, at=index, interactorStyle=6)
def func(widget, event):
i = int(widget.GetRepresentation().GetValue())
plt.renderer = widget.GetCurrentRenderer()
plt.resetcam = False
msh = vol.zSlice(i).lighting('off')
msh.pointColors(cmap=cmaps[index], vmin=vmin, vmax=vmax)
plt.remove(visibles[0], render=False)
if 0 < i < dims[2]:
zlev = zb[1] / (zb[1] - zb[0]) * i + zb[0]
plt.add([msh, sb.z(zlev)])
visibles[0] = msh
return func
######################################################################
plt = Plotter(shape=(1, 3), sharecam=False, bg2='lightcyan')
for index, data in enumerate(volumes):
plt.addSlider2D(slicerfunc(index, data),
0,
data.dimensions()[2],
value=0,
pos=(sliderstart, sliderstop))
printc("Right click to rotate, use slider to slice along z.", box='-')
plt.show(interactive=True)
def StopButtonFunc(self):
vedo.printc(self.StopButton.status(), box="_", dim=True)
if self.StopButton.status() == "STOP":
self.Finalize()
self.Continue = False
from vedo import dataurl, Volume, printc, show
import numpy as np
vol = Volume(dataurl + 'vase.vti')
nx, ny, nz = vol.dimensions()
r0, r1 = vol.scalarRange()
vol.addScalarBar3D(title='original voxel scalars')
# create a set of scalars and add it to the Volume
vol.pointdata["myscalars1"] = np.linspace(r0, r1, num=nx * ny * nz)
# create another set of scalars and add it to the Volume
vol.pointdata["myscalars2"] = np.random.randint(-100, +100, nx * ny * nz)
# make SLCImage scalars the active array (can set 0, to pick the first):
printc('Arrays in Volume are:\n', vol.pointdata.keys(), invert=True)
vol.pointdata.select(
"SLCImage") # select the first data array as the active one
# Build the isosurface of the active scalars,
# but use testscals1 to colorize this isosurface, and then smooth it
iso1 = vol.isosurface().cmap('jet', 'myscalars1').smooth().lw(0.1)
iso1.addScalarBar3D(title='myscalars1')
iso2 = vol.isosurface().cmap('viridis', 'myscalars2')
iso2.addScalarBar3D(title='myscalars2')
show([
(vol, __doc__),
(iso1, "Colorize isosurface using\nmyscalars1"),
(iso2, "Colorize isosurface using\nmyscalars2"),
def onClose(self):
#Disable the interactor before closing to prevent it
#from trying to act on already deleted items
printc("..calling onClose")
self.vtkWidget.close()
"""Mouse click and other type of events
will trigger a call to a custom function"""
from vedo import printc, Plotter, Mesh, datadir
printc("Click object to trigger a function call", invert=1)
# callback functions
def onLeftClick(event):
if not event.actor:
return
printc("Left button pressed on", [event.actor], c=event.actor.color())
# printc('full dump of event:', event)
def onEvent(event):
printc(event.name, 'happened at mouse position', event.picked2d)
######################
tea = Mesh(datadir + "teapot.vtk").c("gold")
mug = Mesh(datadir + "mug.ply").rotateX(90).scale(8).pos(2, 0, -.7).c("silver")
plt = Plotter(axes=11)
plt.addCallback('LeftButtonPress', onLeftClick)
plt.addCallback('Interaction', onEvent) # mouse dragging triggers this
plt.show(tea, mug, __doc__)
"""Generate a denser point cloud.
The new points are created in such a way that
all points in any local neighborhood are
within a target distance of one another"""
from vedo import Points, printc, show
import numpy as np
npts = 50 # nr. of points
coords = np.random.rand(npts, 3) # range is [0, 1]
scals = np.abs(coords[:, 1]) # let the scalar be the y of the point itself
pts = Points(coords, r=9)
pts.pointdata["scals"] = scals
densecloud = pts.densify(0.1, closest=10,
niter=1) # return a new pointcloud.Points
printc('nr. points increased', pts.N(), '\rightarrow ', densecloud.N(), c='lg')
show([(pts, __doc__), densecloud], N=2, axes=1).close()
def onLeftClick(event):
if not event.actor:
return
printc("Left button pressed on", [event.actor], c=event.actor.color())
titleFont=fnt,
labelFont=fnt,
digits=2,
yTitleOffset=-.015,
xLabelSize=0.015,
yLabelSize=0.015,
zLabelSize=0.015,
),
at=i,
camera=cam,
resetcam=not bool(i),
)
################################################################################ printout
for font in fonts:
printc(font + " - available characters are:", " " * 25, bold=1, invert=1)
try:
fontfile = settings.fonts_path + font + '.npz'
font_meshes = np.load(fontfile, allow_pickle=True)['font'][0]
except:
pass
for k in font_meshes.keys():
printc(k, end=' ')
print()
printc('\n(use the above to copy&paste any char into your python script!)',
italic=1)
printc('Symbols ~ ^ _ are reserved modifiers:', italic=1)
printc(' use ~ to add a short space, 1/4 of the default size,', italic=1)
printc(' use ^ and _ to start up/sub scripting, space terminates them.\n',
italic=1)
plt += link[k]
# Create some auxiliary variables
x_dot_m = np.zeros(N + 1)
y_dot_m = np.zeros(N + 1)
dij = np.zeros(N + 1) # array with distances to previous bob
dij_m = np.zeros(N + 1)
for k in range(1, N + 1):
dij[k] = mag([bob_x[k] - bob_x[k - 1], bob_y[k] - bob_y[k - 1]])
fctr = lambda x: (x - 1) / x
Dt *= np.sqrt(1 / g)
Dt2 = Dt / 2 # Midpoint time step
DiaSq = (2 * R)**2 # Diameter of bob squared
printc("Press ESC to exit.", c="red", invert=1)
while True:
bob_x_m = list(map((lambda x, dx: x + Dt2 * dx), bob_x,
x_dot)) # midpoint variables
bob_y_m = list(map((lambda y, dy: y + Dt2 * dy), bob_y, y_dot))
for k in range(1, N + 1):
factor = fctr(dij[k])
x_dot_m[k] = x_dot[k] - Dt2 * (Ks *
(bob_x[k] - bob_x[k - 1]) * factor +
gamma * x_dot[k])
y_dot_m[k] = y_dot[k] - Dt2 * (Ks *
(bob_y[k] - bob_y[k - 1]) * factor +
gamma * y_dot[k] + g)
# Available modifiers:
# c (foreground color), bc (background color)
# bold, blink, underLine, dim, invert, box
from vedo import printc, printHistogram
import numpy as np
printc(" 1- Change the world by being yourself - Amy Poehler\world", c=1)
printc(" 2- Never regret anything that made you smile - Mark Twain\smile",
c="r",
bold=0)
printc(" 3- Every moment is a fresh beginning - T.S Eliot", c="m", underline=1)
printc(" 4- Die with memories, not dreams - Unknown\ethumbup", blink=1, bold=0)
printc(" 5- When words fail, music speaks - Shakespeare \pin")
printc(" 6- Everything you can imagine is real - Pablo Picasso\erocket", c=3)
printc(
" 7- Simplicity is the ultimate sophistication - Leonardo da Vinci\idea",
c=4)
printc(" 8- Whatever you do, do it well - Walt Disney\erainbow", c=3, bc=1)
printc(" 9- What we think, we become - Buddha \etarget", c=6, invert=1)
printc("10- All limitations are self-imposed - Oliver Wendell Holmes\sparks",
c=7,
dim=1)
printc(
"11- If you tell the truth you dont have to remember anything - Mark Twain\checked",
underline=1,
invert=1,
c=6,
dim=1,
)
