# vim: set nosta noet ts=4 sw=4:

#

# Split a single frame into 100 separate pieces, for blender network

# rendering.

#

# Assumptions:

# 	- Shared storage between all render nodes.

# 	- A method for simultaneous blender execution on all nodes (even

# 	  just ssh)

#   - Re-constituting the image performed out of band (most easily with

#     ImageMagick toolset)

#

# Copy this script into the same directory as your blend file, then run

# like so across your render farm:

#

#    blender file.blend -b -P chunked_render.py

#

# When all nodes are finished rendering their chunks, you'll have 100

# separate images.  Combine them back into a single image like so, if

# you have ImageMagick installed:

#

#   montage -background none -mode concatenate -tile 10x10 chunk_* rendered.jpg

#

# Authors:

#

# Mahlon E. Smith <mahlon@martini.nu> and

# Justin Smith <justin@statisticool.com>

#

# License:

#

# Copyright (c) 2016, Mahlon E. Smith <mahlon@martini.nu>

# All rights reserved.

# Redistribution and use in source and binary forms, with or without

# modification, are permitted provided that the following conditions are met:

#

#     * Redistributions of source code must retain the above copyright

#       notice, this list of conditions and the following disclaimer.

#

#     * Redistributions in binary form must reproduce the above copyright

#       notice, this list of conditions and the following disclaimer in the

#       documentation and/or other materials provided with the distribution.

#

#     * Neither the name of Mahlon E. Smith nor the names of his

#       contributors may be used to endorse or promote products derived

#       from this software without specific prior written permission.

#

# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND ANY

# EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE

# DISCLAIMED. IN NO EVENT SHALL THE REGENTS AND CONTRIBUTORS BE LIABLE FOR ANY

# DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES

# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;

# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND

# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS

# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

import bpy

import os

import math

tiles = 100

t_sqr = math.sqrt( tiles )

bpy.ops.wm.addon_enable( module='render_auto_tile_size' )

s = bpy.context.scene

r = s.render

s.ats_settings.is_enabled  = True

s.ats_settings.use_optimal = True

r.use_border         = True

r.use_crop_to_border = True

r.threads_mode       = 'AUTO'

count = 0

for row in range( 1, 11 ):

	for column in range( 1, 11 ):

		count       = count + 1

		filepath    = "chunk_%04d" % count

		placeholder = "." + filepath

		r.filepath  = "//%s" % filepath

		if not os.path.isfile( placeholder ):

			print( "Working on chunk %d (row %d, column %d)" % (count, row, column) )

			placeholder = open( placeholder, 'w')

			placeholder.close

			r.border_min_x = ( column - 1 ) / t_sqr

			r.border_max_x = column / t_sqr

			r.border_min_y = ( t_sqr - row ) / t_sqr

			r.border_max_y = ( t_sqr - row + 1 ) / t_sqr

			bpy.ops.render.render( write_still=True )

		else:

			print( "Another worker already on %s, skipping." % filepath )