当我使用 Python 脚本时 Blender 崩溃

Question

我有一个 python 脚本，当我在文本编辑器中运行时它工作正常。但我想为该脚本创建插件。我不是来自编码背景，所以在 python 方面没有太多知识。我看过一个 YouTube 视频 (https://www.youtube.com/watch?v=Y67eCfiqJQU&ab_channel=chocofur) 来创建插件，但它不起作用 Blender 在安装插件时冻结并执行它，因为我已经提到代码本身工作正常。这是最终代码：

bl_info = {
    "name": "New_Object",
    "author": "Your Name Here",
    "version": (1, 0),
    "blender": (2, 80, 0),
    "location": "View3D > Add > Mesh > New Object",
    "description": "Adds a new Mesh Object",
    "warning": "",
    "doc_url": "",
    "category": "Add Mesh",
}


import bpy
import os

def main(context):


    target_dir = "C:/Users/Arpit/Desktop/UV/" 
    selObj = []

    for obj in bpy.context.selected_objects:
        selObj.append(obj.name)
        bpy.ops.object.select_all(action='TOGGLE')
        i=0
    while i < len(selObj):
        obj = bpy.context.window.scene.objects[0]
        bpy.context.view_layer.objects.active = obj
        bpy.ops.object.mode_set(mode="EDIT")
        bpy.ops.mesh.select_all(action='TOGGLE')
        bpy.ops.mesh.select_all(action='TOGGLE')
        full_file_name=target_dir + bpy.data.objects[selObj[i]].name
        dirname = os.path.dirname(full_file_name)
    if not os.path.exists(dirname):
        os.makedirs(dirname)
        bpy.ops.uv.export_layout(filepath=full_file_name, mode='PNG', size=(4096, 4096), opacity=0.6)
        bpy.ops.object.mode_set(mode="OBJECT")
        bpy.ops.object.select_all(action='TOGGLE')
        i+=1

class SimpleOperator(bpy.types.Operator):
    """Tooltip"""
    bl_idname = "object.simple_operator"
    bl_label = "Simple Object Operator"


    def execute(self, context):
        main(context)
        return {'FINISHED'}

def menu_func(self, context):
    self.layout.operator(SimpleOperator.bl_idname, text=SimpleOperator.bl_label)





class LayoutDemoPanel(bpy.types.Panel):
    """Creates a Panel in the scene context of the properties editor"""
    bl_label = "Layout Demo"
    bl_idname = "SCENE_PT_layout"
    bl_space_type = 'PROPERTIES'
    bl_region_type = 'WINDOW'
    bl_context = "scene"

    def draw(self, context):
        layout = self.layout

        scene = context.scene


        # Big render button
        layout.label(text="Big Button:")
        row = layout.row()
        row.scale_y = 2.0
        row.operator("object.simple_operator")



def register():
    bpy.utils.register_class(LayoutDemoPanel)
    bpy.utils.register_class(SimpleOperator)
    bpy.types.VIEW3D_MT_object.append(menu_func)



def unregister():
    bpy.utils.unregister_class(LayoutDemoPanel)
    bpy.utils.unregister_class(SimpleOperator)
    bpy.types.VIEW3D_MT_object.remove(menu_func)


if __name__ == "__main__":
    register()

请指导我。主要代码在定义主要（上下文）：其余为模板

Answer 1

我不能运行但我看到一些缩进错误 - 这可能会产生问题并且代码可能运行陷入无限循环并冻结程序。

您将 if 与 while 放在同一列中，因此它完成 while-loop 并在退出此循环后执行 rest。但是这个循环检查 i 退出，现在你在这个循环之外有 i += 1 所以它永远不会改变这个 i.

如果您更改缩进，则 if 将在循环内并且 i += 1 也会在循环内，这应该可以解决冻结问题。

def main(context):

    target_dir = "C:/Users/Arpit/Desktop/UV/" 
    selObj = []

    for obj in bpy.context.selected_objects:
        selObj.append(obj.name)
        bpy.ops.object.select_all(action='TOGGLE')

    # --- while-loop ---
    
    i = 0

    while i < len(selObj):
        obj = bpy.context.window.scene.objects[0]
        bpy.context.view_layer.objects.active = obj
        bpy.ops.object.mode_set(mode="EDIT")
        bpy.ops.mesh.select_all(action='TOGGLE')
        bpy.ops.mesh.select_all(action='TOGGLE')
        full_file_name = target_dir + bpy.data.objects[selObj[i]].name
        dirname = os.path.dirname(full_file_name)

        # inside `while`-loop
        if not os.path.exists(dirname):
            os.makedirs(dirname)

        bpy.ops.uv.export_layout(filepath=full_file_name, mode='PNG', size=(4096, 4096), opacity=0.6)
        bpy.ops.object.mode_set(mode="OBJECT")
        bpy.ops.object.select_all(action='TOGGLE')

        i += 1

但坦率地说，我会用 for-loop 来做，它不需要 i = 0、i += 1 和 selObj[i]，只需要 item

    # --- for-loop ---

    # without `i = 0`

    for item in selObj:

        obj = bpy.context.window.scene.objects[0]
        bpy.context.view_layer.objects.active = obj
        bpy.ops.object.mode_set(mode="EDIT")
        bpy.ops.mesh.select_all(action='TOGGLE')
        bpy.ops.mesh.select_all(action='TOGGLE')

        # `item` instead of `selObj[i]`
        full_file_name = target_dir + bpy.data.objects[ item ].name
        dirname = os.path.dirname(full_file_name)

        # inside `while`-loop
        if not os.path.exists(dirname):
            os.makedirs(dirname)

        bpy.ops.uv.export_layout(filepath=full_file_name, mode='PNG', size=(4096, 4096), opacity=0.6)
        bpy.ops.object.mode_set(mode="OBJECT")
        bpy.ops.object.select_all(action='TOGGLE')

        # without `i += 1`

当我使用 Python 脚本时 Blender 崩溃

Blender Crashes when i use Python Script

python

blender