Автор Тема: Градиенты (Gradient Ramp)  (Прочитано 12982 раз)

Оффлайн Samovar

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Re: Градиенты (Gradient Ramp)
« Ответ #15 : 12 Август 2015, 22:06:45 »
Это всё прикольно, но меня интересуют более банальные вещи в плане применения ColorRamp:

[вложение удалено Администратором]

Оффлайн LanuHum

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Re: Градиенты (Gradient Ramp)
« Ответ #16 : 12 Август 2015, 22:55:36 »
Это всё прикольно, но меня интересуют более банальные вещи в плане применения ColorRamp:
Юзай Гимп и Поврей.
В Поврее можно эту чёрно-белую картинку не просто раскрасить, но и каждому цвету придать всевозможные параметры: зеркальность, прозрачность, рельеф и так далее
 :)
Свой экспортёр я не равзвивал в сторону создания беспредельных карт, не было желания. Я там тоже всё замутил на color_ramp Блендера

Оффлайн Samovar

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Re: Градиенты (Gradient Ramp)
« Ответ #17 : 13 Август 2015, 00:17:20 »
Не дорос я до POV-Ray, при всём уважении...
Если есть какие либо конструктивные предложения по импорту .ggr файлов в ColorRamp Блендера,  помимо темы POV-Ray, то буду благодарен.

Онлайн sungreen

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  • Kostroma mon amour
    • sungreen.github.io
Re: Градиенты (Gradient Ramp)
« Ответ #18 : 13 Август 2015, 07:50:56 »
Цитировать
...ибо Блендер не поддерживает colormap более 32 строк
Проверил, точно так и есть... можно использовать только 32 маркера - это максимум 15 сегментов градиента GIMP при условии, что правый и левый маркеры в смежных сегментах одного и того же цвета, иначе 11 сегментов максимум. Благодарю за подсказку. На самом деле это хреново для Блендера... хотя, большинство ggr должны нормально импортироваться в линейном пространстве, думаю...

... наверное 32 выбрано в качестве компромисса ...
... в принципе в коде это можно поправить на другое разумное число, например 256 ...
... сделал правки, работает ...



... но в коде есть такой циклы по количеству colorband и очевидно чем больше элементов (сегментов) тем дольше обсчет ...
Для Кота

Оффлайн Samovar

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Re: Градиенты (Gradient Ramp)
« Ответ #19 : 16 Август 2015, 10:33:05 »

Цитировать
... наверное 32 выбрано в качестве компромисса ...
В принципе, этого достаточно в большинстве случаев...


Цитировать
... сделал правки, работает ...
Это уже радует :)

Цитировать
... но в коде есть такой циклы по количеству colorband и очевидно чем больше элементов (сегментов) тем дольше обсчет ...
Жаль, что разработчики не сделали крутилки для поддержки более чем 32 маркеров градиента в пользовательских настройках. Может, со временем прикрутят...

Оффлайн LanuHum

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Re: Градиенты (Gradient Ramp)
« Ответ #20 : 16 Август 2015, 10:50:09 »

Цитировать
... наверное 32 выбрано в качестве компромисса ...
В принципе, этого достаточно в большинстве случаев...


Цитировать
... сделал правки, работает ...
Это уже радует :)

Цитировать
... но в коде есть такой циклы по количеству colorband и очевидно чем больше элементов (сегментов) тем дольше обсчет ...
Жаль, что разработчики не сделали крутилки для поддержки более чем 32 маркеров градиента в пользовательских настройках. Может, со временем прикрутят...

Я, вообще, не понимаю этого компромиса
Цитировать
... но в коде есть такой циклы по количеству colorband и очевидно чем больше элементов (сегментов) тем дольше обсчет ...
Пользователь сам решит долго это или коротко. А, если юзер кольца Сатурна захочет затекстурить?
Код
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   [0.766 rgbft <1.000,0.965,0.970,0.000,0.552>]
   [0.770 rgbft <1.000,0.965,0.961,0.000,0.570>]
   [0.773 rgbft <1.000,0.965,0.974,0.000,0.614>]
   [0.777 rgbft <1.000,0.969,0.965,0.000,0.599>]
   [0.781 rgbft <1.000,0.954,0.962,0.000,0.632>]
   [0.785 rgbft <1.000,0.962,0.962,0.000,0.571>]
   [0.789 rgbft <1.000,0.970,0.965,0.000,0.626>]
   [0.793 rgbft <1.000,0.961,0.969,0.000,0.652>]
   [0.797 rgbft <1.000,0.948,0.952,0.000,0.657>]
   [0.801 rgbft <1.000,0.961,0.965,0.000,0.598>]
   [0.805 rgbft <1.000,0.961,0.969,0.000,0.618>]
   [0.809 rgbft <1.000,0.960,0.965,0.000,0.635>]
   [0.813 rgbft <1.000,0.969,0.956,0.000,0.641>]
   [0.816 rgbft <1.000,0.964,0.973,0.000,0.635>]
   [0.820 rgbft <1.000,0.956,0.956,0.000,0.648>]
   [0.824 rgbft <1.000,0.977,0.968,0.000,0.626>]
   [0.828 rgbft <1.000,0.956,0.960,0.000,0.671>]
   [0.832 rgbft <1.000,0.977,0.977,0.000,0.643>]
   [0.836 rgbft <1.000,0.973,0.977,0.000,0.661>]
   [0.840 rgbft <1.000,0.960,0.964,0.000,0.628>]
   [0.844 rgbft <1.000,0.968,0.968,0.000,0.651>]
   [0.848 rgbft <1.000,0.973,0.977,0.000,0.692>]
   [0.852 rgbft <1.000,0.983,0.987,0.000,0.632>]
   [0.855 rgbft <1.000,0.969,0.973,0.000,0.662>]
   [0.859 rgbft <1.000,0.968,0.968,0.000,0.621>]
   [0.863 rgbft <1.000,0.973,0.973,0.000,0.644>]
   [0.867 rgbft <1.000,0.961,0.961,0.000,0.661>]
   [0.871 rgbft <1.000,0.969,0.996,0.000,0.568>]
   [0.875 rgbft <1.000,0.975,0.996,0.000,0.620>]
   [0.879 rgbft <1.000,0.969,0.982,0.000,0.675>]
   [0.883 rgbft <1.000,0.969,0.964,0.000,0.634>]
   [0.887 rgbft <1.000,0.973,0.991,0.000,0.656>]
   [0.891 rgbft <1.000,0.948,0.977,0.000,1.000>]
   [0.895 rgbft <1.000,0.968,0.973,0.000,0.607>]
   [0.898 rgbft <1.000,0.984,1.000,0.000,0.611>]
   [0.902 rgbft <1.000,0.961,0.977,0.000,0.503>]
   [0.906 rgbft <1.000,0.976,1.000,0.000,0.592>]
   [0.910 rgbft <0.996,0.968,1.000,0.000,0.599>]
   [0.914 rgbft <0.992,0.972,1.000,0.000,0.648>]
   [0.918 rgbft <0.973,0.957,1.000,0.000,0.619>]
   [0.922 rgbft <0.970,0.958,1.000,0.000,0.538>]
   [0.926 rgbft <0.981,0.962,1.000,0.000,0.636>]
   [0.930 rgbft <0.977,0.954,1.000,0.000,0.591>]
   [0.934 rgbft <0.966,0.954,1.000,0.000,0.591>]
   [0.938 rgbft <0.869,0.897,1.000,0.000,0.538>]
   [0.941 rgbft <0.959,0.943,1.000,0.000,1.000>]
   [0.945 rgbft <0.952,0.952,1.000,0.000,1.000>]
   [0.949 rgbft <0.910,0.891,1.000,0.000,1.000>]
   [0.953 rgbft <0.968,0.968,1.000,0.000,1.000>]
   [0.957 rgbft <1.000,1.000,1.000,0.000,1.000>]
   [0.961 rgbft <1.000,0.891,1.000,0.000,1.000>]
   [0.965 rgbft <1.000,0.858,1.000,0.000,1.000>]
   [0.969 rgbft <1.000,0.858,1.000,0.000,1.000>]
   [0.973 rgbft <0.956,0.858,1.000,0.000,1.000>]
   [0.977 rgbft <1.000,0.858,1.000,0.000,1.000>]
   [0.980 rgbft <0.923,0.858,1.000,0.000,1.000>]
   [0.984 rgbft <1.000,0.858,1.000,0.000,1.000>]
   [0.988 rgbft <0.906,0.906,1.000,0.000,1.000>]
   [0.992 rgbft <0.889,0.889,1.000,0.000,1.000>]

Оффлайн Samovar

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Re: Градиенты (Gradient Ramp)
« Ответ #21 : 16 Август 2015, 20:31:30 »
Цитировать
Пользователь сам решит долго это или коротко. А, если юзер кольца Сатурна захочет затекстурить?
Логично :) Но надо исходить из того, что есть на данный момент.
Спасибо sungreen за ссылку на "полуфабрикат"! Потихоньку врубаюсь...

Оффлайн LanuHum

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Re: Градиенты (Gradient Ramp)
« Ответ #22 : 16 Август 2015, 20:56:26 »
Спасибо sungreen за ссылку на "полуфабрикат"! Потихоньку врубаюсь...
О! Мой любимый wxPython!

Оффлайн LanuHum

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Re: Градиенты (Gradient Ramp)
« Ответ #23 : 17 Август 2015, 20:33:24 »
Файл из коллекции Basic-Brown-Blue.ggr
Код
GIMP Gradient
Name: Basic Brown Blue
2
0.000000 0.074689 0.149378 0.197000 0.154317 0.000000 1.000000 0.200000 0.156667 0.000000 1.000000 2 0 0 0
0.149378 0.382780 1.000000 0.000000 0.020942 1.000000 1.000000 0.000000 0.005784 0.295000 1.000000 3 0 0 0

Попробовал открыть в "полуфабрикате":
Python2:
Код
[leonid@localhost ~]$ cd /home/leonid/python/wx
[leonid@localhost wx]$ python ggr.py Basic-Brown-Blue.ggr
Traceback (most recent call last):
  File "ggr.py", line 140, in <module>
    ggr = GimpGradient(sys.argv[1])
  File "ggr.py", line 15, in __init__
    self.read(f)
  File "ggr.py", line 39, in read
    seg.fn, seg.space) = map(float, line.split())
ValueError: too many values to unpack

Python3:
Код
[leonid@localhost wx]$ python3 ggr.py Basic-Brown-Blue.ggr
Traceback (most recent call last):
  File "ggr.py", line 140, in <module>
    ggr = GimpGradient(sys.argv[1])
  File "ggr.py", line 15, in __init__
    self.read(f)
  File "ggr.py", line 23, in read
    if isinstance(f, basestring):
NameError: name 'basestring' is not defined
[leonid@localhost wx]$
NameError: name 'basestring' is not defined:
https://github.com/oxplot/fysom/issues/1
« Последнее редактирование: 17 Август 2015, 20:40:55 от LanuHum »

Онлайн sungreen

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Re: Градиенты (Gradient Ramp)
« Ответ #24 : 17 Август 2015, 21:04:35 »


... на самом деле там нужно несколько строк для чтения и понимания формата ggr ...
... по ходу, насколько понял, у каждого сегмента может быть свой тип формы, а у colorramp один тип ...
... то есть один в один может и не получиться ...
... но можно сделать группу в которой для каждого сегмента свой узел с указанным типом обработки ...
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Оффлайн LanuHum

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Re: Градиенты (Gradient Ramp)
« Ответ #25 : 17 Август 2015, 22:00:20 »
app = wx.App()

Онлайн sungreen

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Re: Градиенты (Gradient Ramp)
« Ответ #26 : 18 Август 2015, 08:08:13 »
... в продолжение темы выкладываю небольшой код (.blend и .ggr фалы во вложении) ...
... код просто конвертирует границы градиента в маркеры colorramp, без учета всего прочего что есть в файле .ggr ...


Код: python
import bpy, math, sys, os
   
def ggr_read(f):
        f = open(f)
        if f.readline().strip() != "GIMP Gradient":
            raise Exception("Not a GIMP gradient file")
        line = f.readline().strip()
        if not line.startswith("Name: "):
            raise Exception("Not a GIMP gradient file")
        name = line.split(": ", 1)[1]
        nsegs = int(f.readline().strip())
        segs = []
        for i in range(nsegs):
            d = f.readline().strip().split()
            seg = ((float(d[0]),(float(d[3]),float(d[4]),float(d[5]),float(d[6]))),(float(d[2]),(float(d[7]),float(d[8]),float(d[9]),float(d[10]))),float(d[1]),d[11],d[12])
            segs.append(seg)
        return segs           

def cr_info(cr):
    print("Color Ramp info")
    print("interpolation: "+cr.interpolation)
    print("elements:")
    for ecr in cr.elements:
        print("("+str(ecr.position) + ",("+str(ecr.color[0])+", "+str(ecr.color[1])+", "+str(ecr.color[2])+", "+str(ecr.color[3])+"))")
   
 
def ggr_info(ggr):
    print("GIMP Gradient:")
    for seg in ggr:
        print(seg[0]) 

def ggr2cr_simple(ggr,cb):
    for cb in reversed(cr.elements[1:]):
        cr.elements.remove(cb)
    cb = cr.elements[0]
    cb.position = ggr[0][0][0]
    cb.color = ggr[0][0][1]

    n = len(cr.elements) 
    i = 1
    for seg in ggr:
        if i>=n:
            cr.elements.new(1)
        cb = cr.elements[i]
        cb.position = seg[1][0]
        cb.color = seg[1][1]
        i = i+1

#ggr = ggr_read("/home/sungreen/_PROGRAMM/gradients/Flare_Glow_Angular_1.ggr")
#ggr = ggr_read("/home/sungreen/_PROGRAMM/gradients/Nauseating_Headache.ggr")
ggr = ggr_read("/home/sungreen/_PROGRAMM/gradients/Skyline_polluted.ggr")
ggr_info(ggr)
                 
cr = bpy.data.materials['Material'].node_tree.nodes['MyColorRamp'].color_ramp
cr_info(cr)
                       
ggr2cr_simple(ggr,cr)

[вложение удалено Администратором]
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Оффлайн Samovar

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Re: Градиенты (Gradient Ramp)
« Ответ #27 : 18 Август 2015, 20:16:58 »
Спасибо, sungreen!

Онлайн sungreen

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Re: Градиенты (Gradient Ramp)
« Ответ #28 : 18 Август 2015, 20:31:32 »
... думаю что этого хватит для размышления как дальше делать ...
... если оформлять в виде аддона, то нужно подумать в какое место и с каким функционалом вставлять ...
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Оффлайн Samovar

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Re: Градиенты (Gradient Ramp)
« Ответ #29 : 18 Август 2015, 20:36:53 »
Понял. Если возникнут вопросы, то напишу сюда.

 


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