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src/content/post/编程/vtk.js/在vtk.js中stl和json的互相转化.md

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+---
+title: 在vtk.js中stl和json的互相转化
+date: 2024-11-22T00:00:00.000Z
+author: KazooTTT
+type: Post
+status: Published
+tags: null
+finished: true
+published: true
+category: 编程
+slug: in-vtkjs-stl-and-json-are-converted-to-each-other
+description: ''
+noteId_x: 15
+create_time: '2024/11/22 13:35:36'
+update_time: '2024/11/22 14:40:08'
+publish_time: '2024/11/22 14:38:29'
+---
+
+## stl如何转为json
+
+``` ts
+import vtkSTLReader from '@kitware/vtk.js/IO/Geometry/STLReader';
+
+const getStlModelFromPath = async (path: string) => {
+  const response = await fetch(path);
+  const stlArrayBuffer = await response.arrayBuffer();
+  
+  const stlReader = vtkSTLReader.newInstance();
+  stlReader.parseAsArrayBuffer(stlArrayBuffer);
+  
+  const polyData = stlReader.getOutputData();
+  return polyData;
+};
+
+const stlPath = '/path/to/your/model.stl';
+const polyData = await getStlModelFromPath(stlPath);
+const jsonData = polyData.toJSON();
+```
+
+## json如何转为stl
+
+``` ts
+import modelJSON from './model.json';
+
+const convertPolyDataJSONToStl = (polyDataJSON: string, fileName: string = 'model.stl') => {
+    const polyData = vtkPolyData.newInstance(polyDataJSON);
+    const writer = vtkSTLWriter.newInstance();
+
+    writer.setInputData(polyData);
+    const fileContents = writer.getOutputData();
+
+    // Create a blob and download link
+    const blob = new Blob([fileContents], { type: 'application/octet-stream' });
+    const a = window.document.createElement('a');
+    a.href = window.URL.createObjectURL(blob);
+    a.download = fileName;
+
+    // Trigger download
+    document.body.appendChild(a);
+    a.click();
+    document.body.removeChild(a);
+    window.URL.revokeObjectURL(a.href);
+};
+
+
+convertPolyDataJSONToStl(modelJSON);
+
+```