[英]Creating a PDF with scripting in Blender
我在这里是个新手(对Blender来说是新手,对Python来说是新手,而对于编码又是新手),所以请耐心等待。
我有一个Blender脚本,该脚本生成特定的几何图形,然后渲染图像。 然后,在同一脚本中,我想创建一个包含该图像的PDF文件。
我有两个不同的pdf生成脚本,它们在Blender之外(我正在使用Spyder)运行良好,但是如果我在Blender中运行相同的代码,则会遇到问题。
这是第一个:
import datetime
from reportlab.lib.enums import TA_JUSTIFY
from reportlab.lib.pagesizes import letter
from reportlab.platypus import SimpleDocTemplate, Paragraph, Spacer, Image
from reportlab.lib.styles import getSampleStyleSheet, ParagraphStyle
from reportlab.lib.units import mm
import os.path
formatted_date = datetime.date.today()
date_str = str(formatted_date)
full_name = "Nachname, Vorname"
fpath = "I:/MedTech_Projekte/NAM/Studenten/WenokorRebecca_SA/Spyder Scripts/"
fname = full_name + "_" + date_str
fcount = 0
fcounts = fname + "_" + str(fcount) + ".pdf"
while os.path.isfile(fcounts)==True:
fcount += 1
fcounts = fname + "_" + str(fcount) + ".pdf"
print(fcounts)
fname = fcounts
doc = SimpleDocTemplate(fpath + fname,pagesize=letter,
rightMargin=72,leftMargin=72,
topMargin=72,bottomMargin=18)
Story=[]
KRIlogo = fpath + "Klinikum_rechts_der_Isar_logo.png"
lg_res_x = 1920
lg_res_y = 1080
lg_w = 50
lg_h = lg_w * lg_res_y/lg_res_x
lg = Image(KRIlogo, lg_w*mm, lg_h*mm)
lg.hAlign = 'RIGHT'
Story.append(lg)
wireIm = fpath + "20170102_red_20170207-092526.png"
bl_res_x = 1920
bl_res_y = 1080
im_w = 60
im_h = im_w * bl_res_y/bl_res_x
im = Image(wireIm, im_w*mm, im_h*mm)
im.hAlign = 'LEFT'
Story.append(im)
styles=getSampleStyleSheet()
styles.add(ParagraphStyle(name='Justify', alignment=TA_JUSTIFY))
ntext = '<font size=12>%s</font>' % full_name
dtext = '<font size=12>%s</font>' % date_str
Story.append(Paragraph(ntext, styles["Normal"]))
Story.append(Spacer(1, 12))
Story.append(Paragraph(dtext, styles["Normal"]))
Story.append(Spacer(1, 12))
doc.build(Story)
这是第二个:
import datetime
from reportlab.pdfgen import canvas
from reportlab.lib.units import mm
from reportlab.lib.utils import ImageReader
import os.path
formatted_date = datetime.date.today()
date_str = str(formatted_date)
full_name = "Nachname, Vorname"
fpath = "I:/MedTech_Projekte/NAM/Studenten/WenokorRebecca_SA/Spyder Scripts/"
fname = full_name + "_" + date_str
fcount = 0
fcounts = fname + "_" + str(fcount) + ".pdf"
while os.path.isfile(fcounts)==True:
fcount += 1
fcounts = fname + "_" + str(fcount) + ".pdf"
print(fcounts)
fname = fcounts
wireIm = fpath + "20170102_red_20170207-092526.png"
bl_res_x = 1920
bl_res_y = 1080
im_w = 60
im_h = im_w * bl_res_y/bl_res_x
WireImage = ImageReader(wireIm)
c = canvas.Canvas(fname)
c.drawImage(WireImage, 10, 10, width=60*mm)
c.showPage()
c.save()
这两个脚本给了我几乎相同的错误:
Traceback (most recent call last):
File "I:\MedTech_Projekte\NAM\Studenten\WenokorRebecca_SA\BLENDER CODE\2016121
9 - Present\20170109 Face Align.blend\Text.002", line 58, in <module>
File "C:\Program Files\Blender Foundation\Blender\2.78\python\lib\site-package
s\reportlab\platypus\doctemplate.py", line 1200, in build
BaseDocTemplate.build(self,flowables, canvasmaker=canvasmaker)
File "C:\Program Files\Blender Foundation\Blender\2.78\python\lib\site-package
s\reportlab\platypus\doctemplate.py", line 956, in build
self.handle_flowable(flowables)
File "C:\Program Files\Blender Foundation\Blender\2.78\python\lib\site-package
s\reportlab\platypus\doctemplate.py", line 821, in handle_flowable
if frame.add(f, canv, trySplit=self.allowSplitting):
File "C:\Program Files\Blender Foundation\Blender\2.78\python\lib\site-package
s\reportlab\platypus\frames.py", line 167, in _add
w, h = flowable.wrap(aW, h)
File "C:\Program Files\Blender Foundation\Blender\2.78\python\lib\site-package
s\reportlab\platypus\flowables.py", line 484, in wrap
return self.drawWidth, self.drawHeight
File "C:\Program Files\Blender Foundation\Blender\2.78\python\lib\site-package
s\reportlab\platypus\flowables.py", line 478, in __getattr__
self._setup_inner()
File "C:\Program Files\Blender Foundation\Blender\2.78\python\lib\site-package
s\reportlab\platypus\flowables.py", line 442, in _setup_inner
img = self._img
File "C:\Program Files\Blender Foundation\Blender\2.78\python\lib\site-package
s\reportlab\platypus\flowables.py", line 472, in __getattr__
self._img = ImageReader(self._file)
File "C:\Program Files\Blender Foundation\Blender\2.78\python\lib\site-package
s\reportlab\lib\utils.py", line 807, in __init__
annotateException('\nfileName=%r identity=%s'%(fileName,self.identity()))
File "C:\Program Files\Blender Foundation\Blender\2.78\python\lib\site-package
s\reportlab\lib\utils.py", line 1387, in annotateException
rl_reraise(t,v,b)
File "C:\Program Files\Blender Foundation\Blender\2.78\python\lib\site-package
s\reportlab\lib\utils.py", line 144, in rl_reraise
raise v
File "C:\Program Files\Blender Foundation\Blender\2.78\python\lib\site-package
s\reportlab\lib\utils.py", line 801, in __init__
annotateException('\nImaging Library not available, unable to import bitmaps
only jpegs\nfileName=%r identity=%s'%(fileName,self.identity()))
File "C:\Program Files\Blender Foundation\Blender\2.78\python\lib\site-package
s\reportlab\lib\utils.py", line 1387, in annotateException
rl_reraise(t,v,b)
File "C:\Program Files\Blender Foundation\Blender\2.78\python\lib\site-package
s\reportlab\lib\utils.py", line 144, in rl_reraise
raise v
File "C:\Program Files\Blender Foundation\Blender\2.78\python\lib\site-package
s\reportlab\lib\utils.py", line 799, in __init__
self._width,self._height,c=readJPEGInfo(self.fp)
File "C:\Program Files\Blender Foundation\Blender\2.78\python\lib\site-package
s\reportlab\pdfbase\pdfutils.py", line 243, in readJPEGInfo
x = struct.unpack('B', image.read(1))
struct.error: unpack requires a bytes object of length 1
Imaging Library not available, unable to import bitmaps only jpegs
fileName='I:/MedTech_Projekte/NAM/Studenten/WenokorRebecca_SA/Spyder Scripts/Kli
nikum_rechts_der_Isar_logo.png' identity=[ImageReader@0xac09ef0 filename='I:/Med
Tech_Projekte/NAM/Studenten/WenokorRebecca_SA/Spyder Scripts/Klinikum_rechts_der
_Isar_logo.png']
fileName='I:/MedTech_Projekte/NAM/Studenten/WenokorRebecca_SA/Spyder Scripts/Kli
nikum_rechts_der_Isar_logo.png' identity=[ImageReader@0xac09ef0 filename='I:/Med
Tech_Projekte/NAM/Studenten/WenokorRebecca_SA/Spyder Scripts/Klinikum_rechts_der
_Isar_logo.png']
Error: Python script fail, look in the console for now...
当我使用jpeg而不是png时,得到以下信息:
Bibliotheken/Dokumente/Spyder Scripts/20170102_red_20170207-092526.jpeg
Traceback (most recent call last):
File "I:\MedTech_Projekte\NAM\Studenten\WenokorRebecca_SA\BLENDER CODE\2016121
9 - Present\20170109 Face Align.blend\Text.001", line 37, in <module>
File "C:\Program Files\Blender Foundation\Blender\2.78\python\lib\site-package
s\reportlab\pdfgen\canvas.py", line 1237, in save
self._doc.SaveToFile(self._filename, self)
File "C:\Program Files\Blender Foundation\Blender\2.78\python\lib\site-package
s\reportlab\pdfbase\pdfdoc.py", line 218, in SaveToFile
f = open(filename, "wb")
PermissionError: [Errno 13] Permission denied: 'Nachname, Vorname_2017-02-10_0.p
df'
Error: Python script fail, look in the console for now...
许多在线论坛都提到在处理图像时需要PIL和/或枕头。 我不完全了解如何在代码中使用这些库,但是如果代码在Spyder中没有它们就可以工作,那么我不明白为什么在Blender中突然需要它们。
很感谢任何形式的帮助!!! 如果我的问题不清楚,请随时询问更多信息:)
谢谢!
Python提供了一个允许您运行python代码的环境,标准安装包括读取文件和将文本打印到运行python脚本的控制台的功能,以及其他各种功能。
要使用标准python安装未包含的功能,我们可以安装和使用第三方模块,您用于创建pdf的reportlab模块是第三方模块的示例。 reportlab模块知道如何创建pdf文件,如果您希望它向pdf中添加图像,则它将使用另一个知道如何读取图像文件的模块。 如果没有用于读取图像的模块,则它无法获取将图像添加到pdf所需的图像信息,但仍可以创建不带图像的pdf。
当您安装python时,主程序和各个模块将安装到特定位置,可以在需要时找到它们。 Blender的安装包含它自己的python副本和标准库,该库未设置为使用可能具有的任何常规python安装。 如您所见,您可以手动将项目添加到Blender的python版本中,但是在spyder(使用python的标准安装)中工作的脚本的Blender内失败表明您错过了一些东西。
第二个错误是由于权限阻止普通用户写入应用程序文件夹而发生的,因为仅指定文件名会导致尝试在当前目录中创建文件。 您应该能够通过使用目标文件的完整路径而不只是文件名来解决此错误。
您可能希望查看子流程模块,以从Blender外部运行pdf创建脚本,并将使用blender创建的图像的位置作为参数传递。 这样,您就可以运行python脚本来自动执行Blender中的任务,并在spyder中使用的相同设置下进行pdf生成。
在您的终端中
sudo gnome-terminal
这将为您提供root访问权限,然后尝试运行代码
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