我正在尝试将一些对象从 Blender 导出为专有格式。我希望我编写的脚本能够从文件下拉菜单和命令行中从 blender 中导出对象。我在 ubuntu 12.04 LTS 上使用 Blender 2.66。下面是我目前正在尝试运行的文件。
# Required Blender information.
bl_info = {
"name": "My Exporter",
"author": "",
"version": (1, 0),
"blender": (2, 65, 0),
"location": "File > Export > Test (.tst)",
"description": "",
"warning": "",
"wiki_url": "",
"tracker_url": "",
"category": "Import-Export"
}
# Import the Blender required namespaces.
import bpy
from bpy_extras.io_utils import ExportHelper
# The main exporter class.
class MyExporter(bpy.types.Operator, ExportHelper):
bl_idname = "test.tst";
bl_label = "My Exporter";
bl_options = {'PRESET'};
filename_ext = ".tst";
object_count = 0;
def __init__(self):
pass
def execute(self, context):
print("Execute was called.");
# Parse all the objects in the scene.
return {'FINISHED'};
def export_object(self, gameObject):
if (gameObject.type != "MESH"):
print("Object was not of type mesh.");
else:
object_count += 1;
return;
# Define a function to create the menu option for exporting.
def create_menu(self, context):
self.layout.operator(MyExporter.bl_idname,text="test (.tst)");
# Define the Blender required registration functions.
def register():
"""
Handles the registration of the Blender Addon.
"""
bpy.utils.register_module(__name__);
bpy.types.INFO_MT_file_export.append(create_menu);
def unregister():
"""
Handles the unregistering of this Blender Addon.
"""
bpy.utils.unregister_module(__name__);
bpy.types.INFO_MT_file_export.remove(create_menu);
# Handle running the script from Blender's text editor.
if (__name__ == "__main__"):
print("Registering.");
register();
print("Executing.");
# I have tried with these lines uncommented to force it to run
# the execute function, but I get an error saying:
# exporter = MyExporter();
# TypeError: bpy_struct.__new__(type): expected a single argument
#exporter = MyExporter();
#exporter.execute(bpy.context.scene);
我尝试了以下命令:
blender model.blend --background --python myexporter.py
我从中得到以下输出:
Note: No (valid) '~/.config/blender/2.66/config/startup.blend' found,
fall back to built-in default.
Read new prefs: ~/.config/blender/2.66/config/userpref.blend
found bundled python: ~/blender/2.66/python
read blend: ~/model.blend
Registering.
Executing.
Blender quit
MyExporter 类中的 execute 函数似乎从未被调用。我什至尝试直接调用 execute 函数,但是,如果您阅读该区域上方的评论,我似乎也遗漏了一些内容。
当脚本作为附加组件添加到 blender 时,一切正常。它完美地调用了execute。所以至少我有一半在工作。
预先感谢您为我提供的任何帮助。如果我犯了一个愚蠢的错误,我道歉,我在编写这个脚本的同时也在学习 python。
最佳答案
我终于想通了这一点,并认为回来分享答案是个好主意。首先是有效的文件。
# Required Blender information.
bl_info = {
"name": "My Exporter",
"author": "",
"version": (1, 0),
"blender": (2, 65, 0),
"location": "File > Export > Test (.tst)",
"description": "",
"warning": "",
"wiki_url": "",
"tracker_url": "",
"category": "Import-Export"
}
# Import the Blender required namespaces.
import sys, getopt
import bpy
from bpy_extras.io_utils import ExportHelper
# The main exporter class.
class MyExporter(bpy.types.Operator, ExportHelper):
bl_idname = "export_scene.my_exporter";
bl_label = "My Exporter";
bl_options = {'PRESET'};
filename_ext = ".tst";
object_count = 0;
def __init__(self):
pass
def execute(self, context):
print("Execute was called.");
self.parse_command_line_options();
if (self.filepath == ""):
print("No sutable filename was provided to save to.");
return {'FINISHED'};
# Get all the mesh objects in the scene.
objList = [object for object in bpy.context.scene.objects if object.type == 'MESH'];
# Now process all the objects that we found.
for gameObject in objList:
self.export_object(gameObject);
# Parse all the objects in the scene.
return {'FINISHED'};
def export_object(self, gameObject):
if (gameObject.type != "MESH"):
print("Object was not of type mesh.");
else:
self.object_count += 1;
return;
def parse_command_line_options(self):
modelFile = "";
myArgs = [];
argsStartPos = 0;
if (("--" in sys.argv) == False):
return;
argsStartPos = sys.argv.index("--");
argsStartPos += 1;
myArgs = sys.argv[argsStartPos:];
try:
opts, args = getopt.getopt(myArgs, 'hm:', ["help", "model-file="]);
except getOpt.GetoptError:
print("Opt Error.");
return;
for opt, arg in opts:
if (opt in ("-h", "--help")):
print("Run this as the following blender command.");
print("\tblender <blend file> --background --python <script file> -- -m <output file>");
elif (opt in ("-m", "--model-file")):
modelFile = arg;
if (modelFile != ""):
self.filepath = modelFile;
# Define a function to create the menu option for exporting.
def create_menu(self, context):
self.layout.operator(MyExporter.bl_idname,text="test (.tst)");
# Define the Blender required registration functions.
def register():
"""
Handles the registration of the Blender Addon.
"""
bpy.utils.register_module(__name__);
bpy.types.INFO_MT_file_export.append(create_menu);
def unregister():
"""
Handles the unregistering of this Blender Addon.
"""
bpy.utils.unregister_module(__name__);
bpy.types.INFO_MT_file_export.remove(create_menu);
# Handle running the script from Blender's text editor.
if (__name__ == "__main__"):
print("Registering.");
register();
print("Executing.");
bpy.ops.export_scene.my_exporter();
我缺少的关键是错误地为我的导出器类设置了 bl_idname,然后调用了 bpy.ops.export_scene.my_exporter();
可以在此处找到有关我搞砸的更多信息:http://www.blender.org/documentation/blender_python_api_2_66_release/bpy.ops.html
现在,因为我还希望它从命令行运行,而不仅仅是从文件下拉菜单中运行,所以我添加了一个解析函数来解析发送到 Blender 的命令行选项。 Blender 有一个开关“--”,它定义了 Blender 参数输入的结尾,所以如果检测到该开关,那么我会在它之后获取任何参数并将它们解析为我的脚本参数。到目前为止,这似乎工作得很好。
目前,模型文件支持 -h 打印一些帮助信息和 -m 指定保存转换数据的文件。
好吧,我希望这些信息可以帮助其他人。祝你好运。
更新:如果您在运行脚本时在命令行上看到一条或多条类似以下的消息,请使用此 question 中的答案来解决该问题。
skipping driver 'alpha * auto', automatic scripts are disabled
关于python - 如何从命令行运行 Blender 导出器脚本?,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/17079106/