如何用Vedo导出双3D Gyroid结构的水密STL用于3D打印?
解决Vedo导出3D打印水密文件的方法
核心要点
3D打印要求网格必须是**水密(流形)**状态——无重复顶点、非流形边/面,且为闭合体积。Vedo内置了网格修复与格式导出的工具,按以下步骤即可实现需求:
代码修改与导出流程
清理网格,修复拓扑问题
Vedo的Mesh类自带clean()方法,可自动合并重复顶点、删除孤立面、修复非流形结构,这是生成水密网格的关键操作。导出为3D打印兼容格式
使用write()方法导出为STL(3D打印最通用格式)或OBJ,Vedo会自动完成格式转换。
修改后的完整代码
from vedo import * import numpy as np # Parameters a = 5 length = 100 width = 100 height = 10 pi = np.pi x, y, z = np.mgrid[:length, :width, :height] def gen_strut(start, stop): '''Generate the strut parameter t for the gyroid surface. Create a linear gradient''' strut_param = np.ones((length, 1)) strut_param = strut_param * np.linspace(start, stop, width) t = np.repeat(strut_param[:, :, np.newaxis], height, axis=2) return t plt = Plotter(shape=(1, 1), interactive=False, axes=3) scale=0.5 cox = cos(scale * pi * x / a) siy = sin(scale * pi * y / a) coy = cos(scale * pi * y / a) siz = sin(scale * pi * z / a) coz = cos(scale * pi * z / a) six = sin(scale * pi * x / a) U1 = ((six ** 2) * (coy ** 2) + (siy ** 2) * (coz ** 2) + (siz ** 2) * (cox ** 2) + (2 * six * coy * siy * coz) + (2 * six * coy * siz * cox) + (2 * cox * siy * siz * coz)) - (gen_strut(0, 1.3) ** 2) threshold = 0 iso1 = Volume(U1).isosurface(threshold).c('silver').alpha(1) cube = TessellatedBox(n=(int(length-1), int(width-1), int(height-1)), spacing=(1, 1, 1)) iso_cut = cube.cutWithMesh(iso1).c('silver').alpha(1) # --- 新增:网格处理与导出逻辑 --- # 清理切割后的网格,确保水密 iso_cut_clean = iso_cut.clean() # 检查网格是否为流形(水密) print("网格是否水密:", iso_cut_clean.isManifold()) # 导出为二进制STL(3D打印首选,文件体积小) iso_cut_clean.write("double_gyroid_watertight.stl") # 若需ASCII格式STL,可指定参数 # iso_cut_clean.write("double_gyroid_watertight.stl", binary=False) # 也可导出为OBJ格式 # iso_cut_clean.write("double_gyroid_watertight.obj") plt.at(0).show([cube, iso1], "Double Gyroid 1", resetcam=False) plt.interactive().close()
额外修复技巧
- 若
clean()后仍非水密,可尝试用fillHoles()填补小缺口:iso_cut_clean = iso_cut.clean().fillHoles() - 用
checkManifold()查看具体非流形问题,针对性修复:iso_cut.checkManifold()
内容的提问来源于stack exchange,提问作者agentsmith
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