Render History Script

[vico]

I made a little script for keeping a number of renders inside the image editor, as a form of 'Render History'. I think this is very handy to compare the changes in your render.

You have to load the script in a text editor window, and then enable script links (in the scripts panel), then click new, select the script and choose render as the event that will fire the script. If you like the script you can save this in your user default settings and it will work in any new blender file you make.



This way every time you made a render the script automatically saves the image, load it in the image editor window, assign a name to it, pack it inside your blender file, and then remove it from the drive.




You can have your render history inside blender without doing anything, even if you save your file and open it later you will have your render history.

There is a variable in the script called 'NumRender', you can modify its value to set the number of images you want in your render history.

Here it is:

#!BPY
"""
Name: 'Render History'
Blender: 245
Group: 'Wizards'
Tooltip: 'Automatically pack previous renders in blend file'
"""

__author__ = ['Victor Barberan']
__version__ = '0.1'
__url__ = ['']
__bpydoc__ = """
Script for automatically load and pack your previous renders into the blender file.
"""

# ***** BEGIN GPL LICENSE BLOCK *****
#
# Script copyright (C) macouno 2006
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software Foundation,
# Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
#
# ***** END GPL LICENCE BLOCK *****
# --------------------------------------------------------------------------

import os, random
from Blender import *

#This varible define how much renders will be in history
NumRender = 5

#the screen name for renders
screenName = 'RenderHistory'

randomName = 'temp'+str(random.random())[-8:]

if event == 'PostRender':
    
    #get info
    scn = Scene.GetCurrent()
    context = scn.getRenderingContext()
    renderpath = context.renderPath
    imagetype = context.imageType
    tempdir = Get('tempdir')
    
    #save the image in png format
    context.renderPath = tempdir
    context.imageType = Scene.Render.PNG
    context.saveRenderedImage(randomName)
    context.imageType = imagetype
    context.renderPath = renderpath
    
    #get a list with only renderhistory images (recognized with speed = 77)
    list = Image.Get()    
    imglist = []
    
    for i in list:
        if i.speed == 77:
            imglist.append(i)

    imglist.sort

    #needed for avoiding .001 automatic blender name extensions
    for n in range(len(imglist)):
        imglist[n].name = 'tmp'    

    #rename the previous images, starting from 'name 02'
    for n in range(len(imglist)):
        imglist[n].name = screenName+' '+str(n+2).rjust(2,'0')    
        
    #if there are less images that the limit: load new image and renameit
    if len(imglist) < NumRender:
        newImg =    Image.Load(tempdir+randomName+'.png')
        newImg.pack()
        newImg.speed = 77        #this is for recognize the images that the script have loaded
        newImg.name = screenName+' 01'
        newImg.reload()
                
    else:
        #reload last image (wiht the new render) and nameit as the first
        newImg = imglist[-1]
        newImg.setFilename(tempdir+randomName+'.png')
        newImg.reload()
        newImg.name = screenName+' 01'
    
    #remove the rendered image from temp path
    if os.path.exists(tempdir+randomName+'.png'):
        os.remove(tempdir+randomName+'.png')

Hope someone find this usefull.

I have tested this in linux, but it should work on any system (i hope), if someone try this in windows or mac please post your results.

Sorry for mi bad english

vico.

[pepeland]

Very usefull for Me

Daniel

[macouno]

hola vico... very nice.. will certainly have to try it out.

Did you see the autosave script I wrote?
http://www.alienhelpdesk.com/python_...utosave_render

It's pretty similar to your script except that mine saves to the hdd not in the blend file..
I'll try yours to see what I prefer, though I'm guessing your file may become quite big?

[vico]

Glad you find it usefull

macouno: of course i have seen and tried your script, in fact your script give me the idea to make this one.
I prefer having the images inside the blender file, because each time i open my file the renders are still in there, but is a matter of preferences . This script purpose is to compare renders while your scene evolves, if you want to keep every render you make, i will definitely prefer your script.
About the blend becoming to big, you can set the number of renders you want to store inside the blend file, with the variable "NumRender".

Maybe we can join our two scripts and make one with a selectable option between saving or packing your renders? .

Other idea is to load the render images as a sequence inside the image editor (packed or not), this way you can compare the renders with just one keystroke, and keep all your render history in one "Image". But i cant find how to load the sequence and add images when produced.

sorry about my bad english

vico.

[wendellramos]

Congratulations!
Fantastic!

This will save me a lot of work!

[PapaSmurf]

This sure beats having to remember J to jump between renders. Thanks!

[JiriH]

I have problems to run the script.
Console warning says:

Traceback (most recent call last):
File "Render History.py", line 58, (in module)
TypeError: expected a string

Can anyone help me, please? Thank you very much.

[macouno]

JiriH, I expect that it says a bit more than that?

[JiriH]

Originally Posted by macouno JiriH, I expect that it says a bit more than that?

Unfortunately no. Just these three lines.

[BeBraw]

JiriH: Check what you have put to your Blender temp directory setting. It apparently isn't returning a string (perhaps None or something...). Or as a temporary hack you could put a valid path to some directory there (or create own below home or use temporary folder of your OS etc.).