python - 来自 URL 的 Blender Material

Question

我需要一个 python 脚本，它从给定的 URL 获取一个动态创建的图像文件，并使用该图像文件创建一个 Material 。

然后我将该 Material 应用于我的搅拌器对象。

下面的 python 代码适用于本地镜像文件

import bpy, os

def run(origin):
    # Load image file from given path.
    realpath = os.path.expanduser('D:/color.png')
    try:
        img = bpy.data.images.load(realpath)
    except:
        raise NameError("Cannot load image %s" % realpath)

    # Create image texture from image
    cTex = bpy.data.textures.new('ColorTex', type = 'IMAGE')
    cTex.image = img

    # Create material
    mat = bpy.data.materials.new('TexMat')

    # Add texture slot for color texture
    mtex = mat.texture_slots.add()
    mtex.texture = cTex

    # Create new cube
    bpy.ops.mesh.primitive_cube_add(location=origin)

    # Add material to created cube
    ob = bpy.context.object
    me = ob.data
    me.materials.append(mat)

    return

run((0,0,0))

我试过了:

import urllib, cStringIO

file = cStringIO.StringIO(urllib.urlopen(URL).read())
img = Image.open(file)

但是我运气不好。我遇到的第一个错误是

ImportError: No module named 'StringIO'

Blender 中的 python 脚本 API 使用限制性模块还是什么？

感谢您的帮助。

Answer 1

您似乎使用的是 Python 3.3，它没有 cStringIO。使用 io.BytesIO 代替:

import io
data = io.BytesIO(urllib.urlopen(URL).read())

[编辑]

在 OSX 上的 Blender 2.68a 中测试:

import io
from urllib import request
data = io.BytesIO(request.urlopen("http://careers.stackoverflow.com/jobs?a=288").read())
data
>>>> <_io.BytesIO object at 0x11050aae0>

[编辑2]

好的，blender 似乎只能从文件加载。这是对您的脚本的修改，它下载一个 url，将其存储在一个临时位置，从中创建 Material ，将 Material 打包到 blend 文件中并删除临时图像。

导入bpy、os、io 来自 urllib 导入请求

def run(origin):
    # Load image file from url.    
    try:
        #make a temp filename that is valid on your machine
        tmp_filename = "/tmp/temp.png"
        #fetch the image in this file
        request.urlretrieve("https://www.google.com/images/srpr/logo4w.png", tmp_filename)
        #create a blender datablock of it
        img = bpy.data.images.load(tmp_filename)
        #pack the image in the blender file so...
        img.pack()
        #...we can delete the temp image
        os.remove(tmp_filename)
    except Exception as e:
        raise NameError("Cannot load image: {0}".format(e))
    # Create image texture from image
    cTex = bpy.data.textures.new('ColorTex', type='IMAGE')
    cTex.image = img
    # Create material
    mat = bpy.data.materials.new('TexMat')
    # Add texture slot for color texture
    mtex = mat.texture_slots.add()
    mtex.texture = cTex
    # Create new cube
    bpy.ops.mesh.primitive_cube_add(location=origin)
    # Add material to created cube
    ob = bpy.context.object
    me = ob.data
    me.materials.append(mat)

run((0,0,0))

输出: