bug in camera

It seems that camera is not updated when viewup is modified but camera position is not changed:

import k3d
import numpy as np
from numpy import sin,cos,pi
from ipywidgets import interact, interactive, fixed
import ipywidgets as widgets
import time
import math

plot = k3d.plot()

plot.camera_auto_fit = False

T = 1.618033988749895
r = 4.77
zmin,zmax = -r,r
xmin,xmax = -r,r
ymin,ymax = -r,r
Nx,Ny,Nz = 77,77,77

x = np.linspace(xmin,xmax,Nx)
y = np.linspace(ymin,ymax,Ny)
z = np.linspace(zmin,zmax,Nz)
x,y,z = np.meshgrid(x,y,z,indexing='ij')
p = 2 - (cos(x + T*y) + cos(x - T*y) + cos(y + T*z) + cos(y - T*z) + cos(z - T*x) + cos(z + T*x))
iso = k3d.marching_cubes(p.astype(np.float32),xmin=xmin,xmax=xmax,ymin=ymin,ymax=ymax, zmin=zmin, zmax=zmax, level=0.0)
plot += iso

plot.display()

this doesnt work:

@interact(rad=widgets.FloatSlider(value=0,min=0,max=1,step=0.01))
def g(rad):
    plot.camera = [8,0,8,
                   0,0,0,
                   0,1-rad,rad]

while this works:

@interact(rad=widgets.FloatSlider(value=0,min=0,max=1,step=0.01))
def g(rad):
    plot.camera = [8,0,8+rad/100,
                   0,0,0,
                   0,1-rad,rad]

[artur-trzesiok]

Nice spot! This is a issue in ThreeJs: https://github.com/mrdoob/three.js/blob/master/examples/js/controls/TrackballControls.js#L357

ThreeJs emite change event only if position change. They ignore a up vector. You can add them a issue.

[marcinofulus]

check for jupyter --paths: - perhaps you have k3d installed in a multiple locations e.g both in system and user space. Also have a look at jupyter nbextension list. It is possible that you will have to delete some location if there are doubled.

In principle, if jupyter notebook is running kernel from some different env - then I use --user for nbextensions (like central jupyterhub installations)