from k3d.helpers import download
from pyunpack import Archive

filename = download('http://www.semantic3d.net/data/point-clouds/testing1/stgallencathedral_station1_intensity_rgb.7z')
Archive(filename).extractall('./')

import csv
import numpy as np 

data = None

with open(filename.replace('.7z', '.txt'), mode='r') as csv_file:
    csv_reader = csv.reader(csv_file, delimiter=' ')    
    data = np.array(list(csv_reader), dtype=np.float32)

# compute color in hex format
data[:, 4] = np.sum(data[:, 4:7].astype(np.uint32) * np.array([1, 256, 256 ** 2]), axis=1)    
data = data[:, 0:5]

import time
import json
import k3d
import ipywidgets as widgets

plot = k3d.plot()
plot.display()
debug_info = widgets.HTML()
display(debug_info)

obj = k3d.points(data[::2, 0:3], data[::2, 4].astype(np.uint32), point_size=0.05, shader="flat") 
plot += obj

plot.camera = [5.251483149143791,
 -7.92683507646606,
 3.144285796928443,
 -2.470283607444292,
 3.6558150584160503,
 2.3721091212696286,
 0,
 0,
 1]

plot.mode = 'callback'

import json 

g = None
def foo(params):
    global g, debug_info
    
    g = params
    debug_info.value = '<pre>' + json.dumps(params, indent=4) + "</pre>"

obj.click_callback = foo
obj.hover_callback = foo