#!/usr/bin/env python
# coding: utf-8

# # <img style='float: left' src="http://lightning-viz.github.io/images/logo.png"> <br> <br> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Volume renderings in <a href='http://lightning-viz.github.io/'><font color='#9175f0'>Lightning</font></a>

# ## <hr> Setup

# In[1]:


from lightning import Lightning

from colorsys import hsv_to_rgb
from numpy import ndarray, linspace


# ## Connect to server

# In[2]:


lgn = Lightning(ipython=True, host='http://public.lightning-viz.org')


# ## <hr> Color cubes

# Volume rendering lets you render a sequence of images as a 3D volume.
# <br>
# Lightining currently assumes isotropic images, so the sampling in x,y, and z should be comparable.
# <br>
# Visualizing color spaces is a fun way to explore volume rendering. We'll generate RGB and HSV cubes.

# In[3]:


nx, ny, nz = (50, 50, 50)
rgb = ndarray((nx,ny,nz,3))
hsv = ndarray((nx,ny,nz,3))
for i, ii in enumerate(linspace(0,1,nx)):
    for j, jj in enumerate(linspace(0,1,ny)):
        for k, kk in enumerate(linspace(0,1,nz)):
            position = (i, j, k)
            rgb[position] = (kk, jj, ii)
            hsv[position] = hsv_to_rgb(jj, ii, kk)


# Render RGB cube

# In[4]:


lgn.volume([x for x in rgb])


# Render HSV cube

# In[5]:


lgn.volume([x for x in hsv])