I am new to blender and am still playing with this script.
I was hoping someone else out there would try it and see if they can come up with results as shown on Banterles’s page (Link is first one above). I haven’t yet been able to.
This would potentially allow HDRI lighting using blenders internal render engine.
Notes about use:
This script is rough and has to be controlled by changing the script (IE no GUI). If it proves of use, I would like to see me or anyone else develop it further.
#!BPY
""" Registration info for Blender menus:
Name: 'Mediancut light import (.txt)'
Blender: 237
Group: 'Import'
Tip: 'Imports Mediacut text files only'
"""
__author__ = "Cale Fallgatter (calegatter)"
"""
This file can be used freely. You may modify it, but may not distribute
the modification as a part of my file. Please give me credit where credit is due.
Thanks and I hope this works well for you
The program that creates the light data was written for HDRShop and was
written by Francesco Banterle
"""
import Blender
from Blender import Window
from Blender import Lamp
def HDRI_LIGHTS(filename): # callback for the FileSelector
file = open(filename)
#Open only a text file created by Mediancut plugin for HDRShop
kills = 0 #counter to terminate loop
position = 0 #counter to keep place in list
line = file.readlines()
line = line[4:] #gets rid of junk at begining of file
line = line +['
']+['
']+['
'] #add blank lines to end of file to avoid read error
power_total = []
#this for loop is used for presorting file to add total number of light pixels
#this will be used to give each lamp an emit power less than 1 so they total to 1
for x in line:
#Looking for line in text that gives coord. of lights
if line[position][0:4] == 'Dir:':
kills = 0
position = position + 1
continue
#Looking for line in text that gives power of lights in RGB values
elif line[position][0:4] == 'Pow:':
kills = 0
#If light power is found it is stored here as a list
power = line[position][4:].split()
power = [float(power[0]),float(power[1]),float(power[2])]
power_total[:0] = power
position = position + 1
continue
else:
position = position + 1
kills = kills + 1
if kills == 1: #allows the loop to continue if only one blank line is found
continue
elif kills == 2: #terminates loop if two consecutive blank lines are found
power_total_sum = sum(power_total)
break
else:
continue
kills = 0
position = 0
for x in line:
#Looking for line in text that gives coord. of lights
if line[position][0:4] == 'Dir:':
kills = 0
#If light coord. are found they are stored as a list here
direction = line[position][4:].split()
direction = [float(direction[0]),float(direction[1]),float(direction[2])]
position = position + 1
continue
#Looking for line in text that gives power of lights in RGB values
elif line[position][0:4] == 'Pow:':
kills = 0
#If light power is found it is stored here as a list
power = line[position][4:].split()
power = [float(power[0]),float(power[1]),float(power[2])]
power_sum = sum(power)
RGB = [power[0]/power_sum, power[1]/power_sum, power[2]/power_sum]
Energy = (power_sum/power_total_sum)*100
position = position + 1
else:
position = position + 1
kills = kills + 1
if kills == 1: #allows the loop to continue if only one blank line is found
continue
elif kills == 2: #terminates loop if two consecutive blank lines are found
break
else:
pass
scene = Blender.Scene.getCurrent () # get the current scene
ob = Blender.Object.New ('Lamp','Lamp'+str(position)) # make lamp object
l = Blender.Lamp.New () # make lamp data object
ob.link (l) # link lamp data with the object
scene.link (ob) # link the object into the scene
ob.setLocation (direction) # position the object in the scene
l.setCol(RGB) # sets light color
l.setEnergy(Energy) # sets light energy
l.setMode('RayShadow') # sets ray shadow to active
Window.FileSelector (HDRI_LIGHTS, "Open Mediancut Text File")
#
#
Blender.Redraw() # redraw the scene to show the updates.
How do you get the plug-ins to work with HDRSHop? I have 1.0.3 and put the plug-ins in the same directory as the HDRShop program file, but I can’t get the plug-ins to appear in the Plugins drop down menu.
All of the lights will be pointing in one direction so you will have to select all of them and track them to something.
Here is a rendered picture of the monkey using this lighting.
Here is a screen shot of what the lights look like
I think this will be more usefull than the first version.
#!BPY
""" Registration info for Blender menus:
Name: 'Mediancut light import (.txt)'
Blender: 237
Group: 'Import'
Tip: 'Imports Mediacut text files only'
"""
__author__ = "Cale Fallgatter (calegatter)"
"""
This file can be used freely. You may modify it, but may not distribute
the modification as a part of my file. Please give me credit where credit is due.
Thanks and I hope this works well for you
The program that creates the light data was written for HDRShop and was
written by Francesco Banterle
"""
import Blender
from Blender import Window
from Blender import Lamp
def HDRI_LIGHTS(filename): # callback for the FileSelector
file = open(filename)
#Open only a text file created by Mediancut plugin for HDRShop
kills = 0 #counter to terminate loop
position = 0 #counter to keep place in list
line = file.readlines()
line = line[4:] #gets rid of junk at begining of file
line = line +['
']+['
']+['
'] #add blank lines to end of file to avoid read error
power_total = []
#this for loop is used for presorting file to add total number of light pixels
#this will be used to give each lamp an emit power less than 1 so they total to 1
for x in line:
#Looking for line in text that gives coord. of lights
if line[position][0:4] == 'Dir:':
kills = 0
position = position + 1
continue
#Looking for line in text that gives power of lights in RGB values
elif line[position][0:4] == 'Pow:':
kills = 0
#If light power is found it is stored here as a list
power = line[position][4:].split()
power = [float(power[0]),float(power[1]),float(power[2])]
power_total[:0] = power
position = position + 1
continue
else:
position = position + 1
kills = kills + 1
if kills == 1: #allows the loop to continue if only one blank line is found
continue
elif kills == 2: #terminates loop if two consecutive blank lines are found
power_total_sum = sum(power_total)
break
else:
continue
kills = 0
position = 0
for x in line:
#Looking for line in text that gives coord. of lights
if line[position][0:4] == 'Dir:':
kills = 0
#If light coord. are found they are stored as a list here
direction = line[position][4:].split()
direction = [float(direction[0]),float(direction[1]),float(direction[2])]
position = position + 1
continue
#Looking for line in text that gives power of lights in RGB values
elif line[position][0:4] == 'Pow:':
kills = 0
#If light power is found it is stored here as a list
power = line[position][4:].split()
power = [float(power[0]),float(power[1]),float(power[2])]
power_sum = sum(power)
RGB = [power[0]/power_sum, power[1]/power_sum, power[2]/power_sum]
Energy = (power_sum/power_total_sum)*100
position = position + 1
else:
position = position + 1
kills = kills + 1
if kills == 1: #allows the loop to continue if only one blank line is found
continue
elif kills == 2: #terminates loop if two consecutive blank lines are found
break
else:
pass
scene = Blender.Scene.getCurrent () # get the current scene
ob = Blender.Object.New ('Lamp','Lamp'+str(position)) # make lamp object
l = Blender.Lamp.New ('Spot') # make lamp data object
ob.link (l) # link lamp data with the object
scene.link (ob) # link the object into the scene
ob.setLocation (direction) # position the object in the scene
l.setCol(RGB) # sets light color
l.setEnergy(Energy) # sets light energy
l.setMode('Shadows') # sets Shadow Buff. shadow to active
Window.FileSelector (HDRI_LIGHTS, "Open Mediancut Text File")
#
#
Blender.Redraw() # redraw the scene to show the updates.
I was going to post some quick test images that I made with the Lamp version of the script versus the new spot version. I set the energy of the lamps to *25 as opposed to the *100 that is originally in the script.
The problem is that when I reply I don’t see the choice in the editor to post an attach an image. Where’d they go.
In your first preview I saw well a LOT of lamps.
Won’t this slow down performance incredibly?
What’s the difference between a Yafray/HDRI render
and a Blender render with your script?
P
You can choose how many lights to use to simulate an HDRI image. I used 256. You can use less.
Your right about process time. Using that many lights is kinda slow. The reason I created this is because of problems I was having rendering with HDRI in yafray (specifically refraction of textures).
According to the developers of the algorithm (the one that converts the HDRI into light), this was suppose to be fast compared to HDRI.
As it stands, its another tool to ad to the arsenal.
If you do try it out, give me some ideas to make it more usefull.
Here is my result with the Spot Size set to 120 and the bias to 0.01 (as suggested by bigbad). The lighting looks much better. This was the first time I have ever modified a script and the API is very helpful with little tweaks like this (http://members.iinet.net.au/~cpbarton/ideasman/BPY_API/)
It would be great to see a simple interface that allows you to set some of the basic lighting options (type, energy, distance, etc.). Calegatter, thanks for your work on this script.
