368 lines
12 KiB
Python
368 lines
12 KiB
Python
import bpy
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import json
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import mathutils
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import os
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import bmesh
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import sys
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# 获取命令行参数
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def get_json_path():
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"""从命令行参数获取JSON文件路径"""
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if len(sys.argv) > 5: # Blender传递的参数格式: blender --background --python script.py -- json_path
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# 查找 -- 分隔符后的参数
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for i, arg in enumerate(sys.argv):
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if arg == "--" and i + 1 < len(sys.argv):
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return sys.argv[i + 1]
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# 如果没有找到参数，使用默认路径
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return "./e8caffb4622e03b1495bbc1ed13fce13.json"
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# 清空场景
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bpy.ops.wm.read_factory_settings(use_empty=True)
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# 设置渲染引擎为Cycles（更好的材质渲染）
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bpy.context.scene.render.engine = 'CYCLES'
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# 加载 JSON 文件
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json_path = get_json_path()
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print(f"尝试加载JSON文件：{json_path}")
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try:
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with open(json_path, 'r', encoding='utf-8') as f:
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data = json.load(f)
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print(f"✅ 成功加载JSON文件：{json_path}")
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print(f"包含 {len(data['children'])} 个对象")
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except FileNotFoundError:
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print(f"❌ 错误：找不到JSON文件 {json_path}")
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sys.exit(1)
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except json.JSONDecodeError as e:
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print(f"❌ 错误：JSON文件格式错误 {e}")
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sys.exit(1)
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except Exception as e:
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print(f"❌ 错误：加载JSON文件时出错 {e}")
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sys.exit(1)
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# 创建金属材质
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def create_metal_material():
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mat = bpy.data.materials.new(name="metal")
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mat.use_nodes = True
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bsdf = mat.node_tree.nodes["Principled BSDF"]
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bsdf.inputs["Metallic"].default_value = 1.0
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bsdf.inputs["Roughness"].default_value = 0.2
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bsdf.inputs["Base Color"].default_value = (0.8, 0.8, 0.9, 1.0) # 淡蓝色金属
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return mat
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# 创建透明材质（用于 nothing）
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def create_nothing_material():
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mat = bpy.data.materials.new(name="nothing")
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mat.use_nodes = True
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bsdf = mat.node_tree.nodes["Principled BSDF"]
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bsdf.inputs["Alpha"].default_value = 0.1
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bsdf.inputs["Base Color"].default_value = (1.0, 1.0, 1.0, 0.1)
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mat.blend_method = 'BLEND'
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mat.show_transparent_back = False
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return mat
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# 创建发光材质（用于特殊对象）
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def create_emissive_material():
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mat = bpy.data.materials.new(name="emissive")
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mat.use_nodes = True
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bsdf = mat.node_tree.nodes["Principled BSDF"]
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# 在Blender 4.0+中，发光属性可能位置不同
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try:
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if "Emission" in bsdf.inputs:
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bsdf.inputs["Emission"].default_value = (1.0, 0.8, 0.2, 1.0)
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elif "Emission Color" in bsdf.inputs:
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bsdf.inputs["Emission Color"].default_value = (1.0, 0.8, 0.2, 1.0)
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if "Emission Strength" in bsdf.inputs:
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bsdf.inputs["Emission Strength"].default_value = 2.0
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else:
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# 备用方案：使用较亮的基础颜色
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bsdf.inputs["Base Color"].default_value = (1.0, 0.8, 0.2, 1.0)
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except Exception as e:
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print(f"设置发光材质时出错: {e}")
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# 备用方案：创建简单的明亮材质
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bsdf.inputs["Base Color"].default_value = (1.0, 0.8, 0.2, 1.0)
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bsdf.inputs["Roughness"].default_value = 0.1
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return mat
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# 创建材质
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metal_mat = create_metal_material()
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nothing_mat = create_nothing_material()
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emissive_mat = create_emissive_material()
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# 创建更精确的抛物面
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def create_parabolic_surface(face_f, size=1.0, resolution=32):
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bm = bmesh.new()
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# 创建抛物面网格
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for i in range(resolution):
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for j in range(resolution):
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u = (i / (resolution - 1) - 0.5) * size
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v = (j / (resolution - 1) - 0.5) * size
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# 抛物面方程: z = (u^2 + v^2) / (4*f)
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if face_f > 0 and face_f < 1e9: # 避免除零和无限大
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z = (u*u + v*v) / (4 * face_f)
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else:
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z = 0
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bm.verts.new((u, v, z))
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bm.verts.ensure_lookup_table()
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# 创建面
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for i in range(resolution - 1):
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for j in range(resolution - 1):
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v1 = i * resolution + j
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v2 = i * resolution + j + 1
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v3 = (i + 1) * resolution + j + 1
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v4 = (i + 1) * resolution + j
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bm.faces.new([bm.verts[v1], bm.verts[v2], bm.verts[v3], bm.verts[v4]])
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# 创建网格对象
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mesh = bpy.data.meshes.new("parabolic_surface")
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bm.to_mesh(mesh)
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bm.free()
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obj = bpy.data.objects.new("parabolic_surface", mesh)
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bpy.context.collection.objects.link(obj)
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return obj
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# 创建双曲面
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def create_hyperbolic_surface(face_f, face_g, size=1.0, resolution=32):
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bm = bmesh.new()
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# 创建双曲面网格
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for i in range(resolution):
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for j in range(resolution):
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u = (i / (resolution - 1) - 0.5) * size
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v = (j / (resolution - 1) - 0.5) * size
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# 双曲面方程: z^2/f^2 - (u^2 + v^2)/g^2 = 1
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if abs(face_g) > 0.1 and abs(face_f) > 0.1:
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try:
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z_squared = face_f * face_f * (1 + (u*u + v*v) / (face_g * face_g))
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if z_squared >= 0:
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z = (face_f if face_f > 0 else -face_f) * (z_squared ** 0.5)
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else:
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z = 0
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except:
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z = 0
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else:
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z = 0
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bm.verts.new((u, v, z))
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bm.verts.ensure_lookup_table()
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# 创建面
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for i in range(resolution - 1):
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for j in range(resolution - 1):
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v1 = i * resolution + j
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v2 = i * resolution + j + 1
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v3 = (i + 1) * resolution + j + 1
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v4 = (i + 1) * resolution + j
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bm.faces.new([bm.verts[v1], bm.verts[v2], bm.verts[v3], bm.verts[v4]])
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mesh = bpy.data.meshes.new("hyperbolic_surface")
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bm.to_mesh(mesh)
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bm.free()
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obj = bpy.data.objects.new("hyperbolic_surface", mesh)
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bpy.context.collection.objects.link(obj)
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return obj
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# 根据面类型创建物体
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def create_geometry(obj_data):
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face_geom = obj_data.get("face_geometry", "plane")
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face_type = obj_data.get("face_type", "")
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name = obj_data.get("name", "noname")
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pos = obj_data["p"]
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quat = obj_data["q"]
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material_name = obj_data.get("draw_material", "metal")
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face_f = obj_data.get("face_f", 1.0)
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face_g = obj_data.get("face_g", 1.0)
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print(f"创建对象: {name} ({face_geom})")
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mesh = None
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try:
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if face_geom == "plane":
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# 创建圆形平面而不是方形
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bpy.ops.mesh.primitive_circle_add(vertices=32, radius=0.5)
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mesh = bpy.context.active_object
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# 填充圆形
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bpy.ops.object.mode_set(mode='EDIT')
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bpy.ops.mesh.edge_face_add()
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bpy.ops.object.mode_set(mode='OBJECT')
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elif face_geom == "circle":
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# 创建圆形平面
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bpy.ops.mesh.primitive_circle_add(vertices=32, radius=0.5)
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mesh = bpy.context.active_object
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# 填充圆形
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bpy.ops.object.mode_set(mode='EDIT')
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bpy.ops.mesh.edge_face_add()
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bpy.ops.object.mode_set(mode='OBJECT')
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elif face_geom == "parabola":
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if face_f < 1e9 and face_f > 0.1: # 使用精确抛物面
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mesh = create_parabolic_surface(face_f)
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else: # 使用简化圆锥
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bpy.ops.mesh.primitive_cone_add(vertices=32, radius1=0.75, radius2=0.05, depth=1.0)
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mesh = bpy.context.active_object
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elif face_geom == "hyperbola":
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if abs(face_f) > 0.1 and abs(face_g) > 0.1: # 使用精确双曲面
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mesh = create_hyperbolic_surface(face_f, face_g)
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else: # 使用简化环面
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bpy.ops.mesh.primitive_torus_add(major_radius=0.5, minor_radius=0.15)
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mesh = bpy.context.active_object
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else:
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# 默认立方体
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bpy.ops.mesh.primitive_cube_add(size=0.5)
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mesh = bpy.context.active_object
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except Exception as e:
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print(f"创建几何体时出错: {e}")
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# 备用：创建简单立方体
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bpy.ops.mesh.primitive_cube_add(size=0.25)
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mesh = bpy.context.active_object
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# 设置对象属性
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mesh.name = name
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mesh.location = pos
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mesh.rotation_mode = 'QUATERNION'
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mesh.rotation_quaternion = mathutils.Quaternion(quat)
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# 设置材质
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if material_name == "metal":
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mesh.data.materials.append(metal_mat)
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elif material_name == "nothing":
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mesh.data.materials.append(nothing_mat)
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else:
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mesh.data.materials.append(emissive_mat)
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return mesh
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# 创建集合来组织对象
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collection = bpy.data.collections.new("OpticalSystem")
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bpy.context.scene.collection.children.link(collection)
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# 遍历并创建所有子对象
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created_objects = []
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for i, child in enumerate(data["children"]):
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try:
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obj = create_geometry(child)
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created_objects.append(obj)
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# 将对象移动到专用集合
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bpy.context.collection.objects.unlink(obj)
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collection.objects.link(obj)
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except Exception as e:
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print(f"创建对象 {i} 时出错: {e}")
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print(f"成功创建了 {len(created_objects)} 个对象")
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# 添加相机和灯光
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def setup_scene():
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# 添加相机
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bpy.ops.object.camera_add(location=(15, -15, 10))
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camera = bpy.context.active_object
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camera.rotation_euler = (1.1, 0, 0.785)
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bpy.context.scene.camera = camera
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# 添加主灯光
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bpy.ops.object.light_add(type='SUN', location=(5, 5, 10))
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sun = bpy.context.active_object
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sun.data.energy = 3.0
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# 添加环境光
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bpy.ops.object.light_add(type='AREA', location=(-5, -5, 8))
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area = bpy.context.active_object
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area.data.energy = 50.0
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area.data.size = 10.0
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setup_scene()
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# 设置渲染参数
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scene = bpy.context.scene
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scene.render.resolution_x = 1920
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scene.render.resolution_y = 1080
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scene.render.image_settings.file_format = 'PNG'
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# 导出函数
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def export_model():
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print(f"准备导出 {len(created_objects)} 个对象...")
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if not created_objects:
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print("警告：没有创建任何对象，跳过导出")
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return
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# 选择所有创建的对象
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bpy.ops.object.select_all(action='DESELECT')
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for obj in created_objects:
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if obj and obj.name in bpy.data.objects:
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obj.select_set(True)
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print(f"已选择对象: {obj.name}")
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try:
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# 导出为OBJ格式
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obj_path = os.path.abspath("./optical_system.obj")
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bpy.ops.export_scene.obj(filepath=obj_path, use_selection=True, use_materials=True)
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print(f"模型已导出为: {obj_path}")
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except Exception as e:
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print(f"OBJ导出失败: {e}")
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try:
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# 导出为GLB格式（适合web展示）
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glb_path = os.path.abspath("./optical_system.glb")
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bpy.ops.export_scene.gltf(filepath=glb_path, use_selection=True, export_materials='EXPORT')
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print(f"模型已导出为: {glb_path}")
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except Exception as e:
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print(f"GLB导出失败: {e}")
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try:
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# 保存Blender文件
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blend_path = os.path.abspath("./optical_system.blend")
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bpy.ops.wm.save_as_mainfile(filepath=blend_path)
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print(f"Blender文件已保存为: {blend_path}")
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except Exception as e:
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print(f"Blender文件保存失败: {e}")
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# 渲染图像
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def render_image():
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try:
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render_path = os.path.abspath("./optical_system_render.png")
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scene.render.filepath = render_path
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print(f"开始渲染到: {render_path}")
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bpy.ops.render.render(write_still=True)
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print(f"渲染图像已保存为: {render_path}")
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except Exception as e:
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print(f"渲染失败: {e}")
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import traceback
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traceback.print_exc()
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# 执行导出和渲染
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try:
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print("开始导出模型...")
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export_model()
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print("开始渲染图像...")
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render_image()
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print("脚本执行完成！")
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print("生成的文件:")
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print("- optical_system.obj (3D模型)")
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print("- optical_system.glb (Web友好格式)")
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print("- optical_system.blend (Blender工程文件)")
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print("- optical_system_render.png (渲染图像)")
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except Exception as e:
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print(f"执行导出/渲染时出错: {e}")
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import traceback
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traceback.print_exc()
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