本 Blender 自動

進階 Blender Python—程序模、鍵動畫、批操、運算註、加件開發。

用

• 自動重複模/動務→用
• 自算或資生程序幾何→用
• 建批繪管含參變→用
• 築自運算或加件→用
• 接 Blender 與外資管或 API→用
• 數精動畫本→用
• 開組工→用

入

行

一：程序幾何生

用 BMesh 程生網：

import bpy
import bmesh
import math

def create_parametric_surface(name, u_res=32, v_res=32):
    """Generate parametric surface using mathematical function."""
    mesh = bpy.data.meshes.new(name)
    obj = bpy.data.objects.new(name, mesh)
    bpy.context.collection.objects.link(obj)

    bm = bmesh.new()

    verts = []
    for i in range(u_res):
        for j in range(v_res):
            u = (i / (u_res - 1)) * 2 * math.pi
            v = (j / (v_res - 1)) * math.pi

            x = math.sin(v) * math.cos(u)
            y = math.sin(v) * math.sin(u)
            z = math.cos(v)

            vert = bm.verts.new((x, y, z))
            verts.append(vert)

    bm.verts.ensure_lookup_table()
    for i in range(u_res - 1):
        for j in range(v_res - 1):
            v1 = verts[i * v_res + j]
            v2 = verts[(i + 1) * v_res + j]
            v3 = verts[(i + 1) * v_res + (j + 1)]
            v4 = verts[i * v_res + (j + 1)]
            bm.faces.new([v1, v2, v3, v4])

    bm.to_mesh(mesh)
    bm.free()

    return obj

得：自數函生複幾何。

敗：察 BMesh API、驗點索、確面流形。

二：鍵動畫自動

本鍵動與驅：

def animate_rotation(obj, start_frame=1, end_frame=250, axis='Z', rotations=2):
    """Animate object rotation over time."""
    obj.rotation_euler[2] = 0
    obj.keyframe_insert(data_path="rotation_euler", index=2, frame=start_frame)

    obj.rotation_euler[2] = rotations * 2 * math.pi
    obj.keyframe_insert(data_path="rotation_euler", index=2, frame=end_frame)

    if obj.animation_data and obj.animation_data.action:
        for fcurve in obj.animation_data.action.fcurves:
            if 'rotation_euler' in fcurve.data_path:
                for keyframe in fcurve.keyframe_points:
                    keyframe.interpolation = 'LINEAR'

def animate_material_property(mat, property_path, values, frames):
    """Animate material node values."""
    if not mat.node_tree:
        return

    nodes = mat.node_tree.nodes
    emission = nodes.get('Emission')
    if emission:
        for frame, value in zip(frames, values):
            emission.inputs['Strength'].default_value = value
            emission.inputs['Strength'].keyframe_insert(
                data_path="default_value",
                frame=frame
            )

def create_driver(obj, property_path, expression):
    """Create driver for automated animation."""
    driver = obj.driver_add(property_path)
    driver.driver.type = 'SCRIPTED'
    driver.driver.expression = expression

得：鍵插、動正回放。

敗：察屬路、驗 data_path 法、確物可鍵。

三：批處操

批處諸物或檔：

import os
from pathlib import Path

def batch_import_and_render(input_dir, output_dir, file_pattern="*.obj"):
    """Import multiple files and render each."""
    input_path = Path(input_dir)
    output_path = Path(output_dir)
    output_path.mkdir(exist_ok=True)

    scene = bpy.context.scene

    for obj_file in input_path.glob(file_pattern):
        bpy.ops.object.select_all(action='SELECT')
        bpy.ops.object.delete()

        bpy.ops.import_scene.obj(filepath=str(obj_file))

        setup_camera()
        setup_lighting()

        output_file = output_path / f"{obj_file.stem}.png"
        scene.render.filepath = str(output_file)
        bpy.ops.render.render(write_still=True)

        print(f"Rendered: {output_file}")

def batch_material_variation(base_object, colors, output_prefix):
    """Render object with multiple material colors."""
    mat = base_object.data.materials[0]
    bsdf = mat.node_tree.nodes.get('Principled BSDF')

    if not bsdf:
        return

    for i, color in enumerate(colors):
        bsdf.inputs['Base Color'].default_value = color + (1.0,)

        bpy.context.scene.render.filepath = f"{output_prefix}_{i:03d}.png"
        bpy.ops.render.render(write_still=True)

得：諸檔處、各變生繪。

敗：察徑存、驗入運算、理缺材。

四：自運算開發

築自運算為複用工：

import bpy
from bpy.props import FloatProperty, IntProperty

class OBJECT_OT_generate_spiral(bpy.types.Operator):
    """Generate a spiral curve"""
    bl_idname = "object.generate_spiral"
    bl_label = "Generate Spiral"
    bl_options = {'REGISTER', 'UNDO'}

    radius: FloatProperty(
        name="Radius",
        description="Spiral radius",
        default=2.0,
        min=0.1,
        max=10.0
    )

    turns: IntProperty(
        name="Turns",
        description="Number of spiral turns",
        default=5,
        min=1,
        max=20
    )

    resolution: IntProperty(
        name="Resolution",
        description="Points per turn",
        default=32,
        min=8,
        max=128
    )

    def execute(self, context):
        curve = bpy.data.curves.new('Spiral', 'CURVE')
        curve.dimensions = '3D'

        spline = curve.splines.new('NURBS')
        num_points = self.turns * self.resolution

        spline.points.add(num_points - 1)

        for i in range(num_points):
            t = i / self.resolution
            angle = t * 2 * math.pi

            x = self.radius * math.cos(angle)
            y = self.radius * math.sin(angle)
            z = t * 0.5

            spline.points[i].co = (x, y, z, 1.0)

        obj = bpy.data.objects.new('Spiral', curve)
        context.collection.objects.link(obj)
        obj.select_set(True)
        context.view_layer.objects.active = obj

        self.report({'INFO'}, f"Generated spiral with {num_points} points")
        return {'FINISHED'}

def register():
    bpy.utils.register_class(OBJECT_OT_generate_spiral)

def unregister():
    bpy.utils.unregister_class(OBJECT_OT_generate_spiral)

if __name__ == "__main__":
    register()

得：運算現於搜、行支撤。

敗：察 bl_idname 式（小寫底線）、驗屬型。

五：模運算為互動工

築互動模運算：

class OBJECT_OT_modal_scale(bpy.types.Operator):
    """Interactive scaling with mouse"""
    bl_idname = "object.modal_scale"
    bl_label = "Modal Scale"
    bl_options = {'REGISTER', 'UNDO'}

    def __init__(self):
        self.initial_mouse_x = 0
        self.initial_scale = 1.0

    def modal(self, context, event):
        if event.type == 'MOUSEMOVE':
            delta = event.mouse_x - self.initial_mouse_x
            scale = self.initial_scale + (delta / 100.0)
            scale = max(0.1, scale)

            context.active_object.scale = (scale, scale, scale)

        elif event.type == 'LEFTMOUSE':
            return {'FINISHED'}

        elif event.type in {'RIGHTMOUSE', 'ESC'}:
            context.active_object.scale = (
                self.initial_scale,
                self.initial_scale,
                self.initial_scale
            )
            return {'CANCELLED'}

        return {'RUNNING_MODAL'}

    def invoke(self, context, event):
        if context.active_object:
            self.initial_mouse_x = event.mouse_x
            self.initial_scale = context.active_object.scale[0]

            context.window_manager.modal_handler_add(self)
            return {'RUNNING_MODAL'}
        else:
            self.report({'WARNING'}, "No active object")
            return {'CANCELLED'}

得：互動運算應鼠、左確、ESC 撤。

敗：察事型、確模處加、理無活物。

六：加件包

組碼為可裝加件：

bl_info = {
    "name": "Custom Tools",
    "author": "Your Name",
    "version": (1, 0, 0),
    "blender": (3, 0, 0),
    "location": "View3D > Add > Mesh",
    "description": "Collection of custom modeling tools",
    "category": "Add Mesh",
}

import bpy

from .operators import OBJECT_OT_generate_spiral

classes = (
    OBJECT_OT_generate_spiral,
)

def menu_func(self, context):
    """Add to menu."""
    self.layout.operator(OBJECT_OT_generate_spiral.bl_idname)

def register():
    for cls in classes:
        bpy.utils.register_class(cls)

    bpy.types.VIEW3D_MT_mesh_add.append(menu_func)

def unregister():
    bpy.types.VIEW3D_MT_mesh_add.remove(menu_func)

    for cls in reversed(classes):
        bpy.utils.unregister_class(cls)

if __name__ == "__main__":
    register()

得：加件經 Preferences 裝、運算現於菜。

敗：察 bl_info 式、驗 Blender 本需、確諸類列。

七：資導程序生

自外資生幾何：

import csv
import json

def create_from_csv(filepath):
    """Generate objects from CSV data."""
    with open(filepath, 'r') as f:
        reader = csv.DictReader(f)

        for row in reader:
            name = row['name']
            x, y, z = float(row['x']), float(row['y']), float(row['z'])
            scale = float(row.get('scale', 1.0))

            bpy.ops.mesh.primitive_uv_sphere_add(location=(x, y, z))
            obj = bpy.context.active_object
            obj.name = name
            obj.scale = (scale, scale, scale)

def create_from_json(filepath):
    """Generate scene from JSON configuration."""
    with open(filepath, 'r') as f:
        config = json.load(f)

    for obj_config in config.get('objects', []):
        obj_type = obj_config['type']
        location = obj_config['location']

        if obj_type == 'cube':
            bpy.ops.mesh.primitive_cube_add(location=location)
        elif obj_type == 'sphere':
            bpy.ops.mesh.primitive_uv_sphere_add(location=location)

        obj = bpy.context.active_object
        obj.name = obj_config.get('name', 'Object')

        if 'material' in obj_config:
            mat_name = obj_config['material']
            mat = bpy.data.materials.get(mat_name)
            if mat:
                obj.data.materials.append(mat)

得：物自外資檔生。

敗：驗檔式、理缺欄、予默值。

驗

• 本於 Blender Python 行無誤
• 程序幾何如期生
• 動鍵插於正幀
• 批操處諸檔
• 自運算現於搜並正行
• 模運算應鼠/鍵
• 加件裝/卸潔
• 外資檔正解
• 誤理覆邊例
• 碼循 PEP 8

忌

1. 加件循入：用相對入、慎組模
2. 運算名：bl_idname 必小寫單底線（類.名）
3. 屬型：用正 bpy.props 型（FloatProperty、IntProperty 等）
4. 境訪：非諸運算於諸境（視口 vs 繪）
5. BMesh 清：bm.to_mesh() 後恆 bm.free() 防漏
6. 動鍵時：幀始 1 非 0
7. 驅式誤：驗式、用安名空
8. 模運算阻：勿阻於 modal()、用非阻操
9. 加件裝徑：置於 Blender scripts/addons
10. 本相容：API 跨本變、文錄需

參

• create-3d-scene
• render-blender-output
• create-r-package