Initial project import

node_modules/three-stdlib/loaders/STLLoader.js

@@ -0,0 +1,192 @@
+import { Loader, FileLoader, BufferGeometry, BufferAttribute, Vector3, Float32BufferAttribute } from "three";
+import { decodeText } from "../_polyfill/LoaderUtils.js";
+class STLLoader extends Loader {
+  constructor(manager) {
+    super(manager);
+  }
+  load(url, onLoad, onProgress, onError) {
+    const scope = this;
+    const loader = new FileLoader(this.manager);
+    loader.setPath(this.path);
+    loader.setResponseType("arraybuffer");
+    loader.setRequestHeader(this.requestHeader);
+    loader.setWithCredentials(this.withCredentials);
+    loader.load(
+      url,
+      function(text) {
+        try {
+          onLoad(scope.parse(text));
+        } catch (e) {
+          if (onError) {
+            onError(e);
+          } else {
+            console.error(e);
+          }
+          scope.manager.itemError(url);
+        }
+      },
+      onProgress,
+      onError
+    );
+  }
+  parse(data) {
+    function isBinary(data2) {
+      const reader = new DataView(data2);
+      const face_size = 32 / 8 * 3 + 32 / 8 * 3 * 3 + 16 / 8;
+      const n_faces = reader.getUint32(80, true);
+      const expect = 80 + 32 / 8 + n_faces * face_size;
+      if (expect === reader.byteLength) {
+        return true;
+      }
+      const solid = [115, 111, 108, 105, 100];
+      for (let off = 0; off < 5; off++) {
+        if (matchDataViewAt(solid, reader, off))
+          return false;
+      }
+      return true;
+    }
+    function matchDataViewAt(query, reader, offset) {
+      for (let i = 0, il = query.length; i < il; i++) {
+        if (query[i] !== reader.getUint8(offset + i, false))
+          return false;
+      }
+      return true;
+    }
+    function parseBinary(data2) {
+      const reader = new DataView(data2);
+      const faces = reader.getUint32(80, true);
+      let r, g, b, hasColors = false, colors;
+      let defaultR, defaultG, defaultB, alpha;
+      for (let index = 0; index < 80 - 10; index++) {
+        if (reader.getUint32(index, false) == 1129270351 && reader.getUint8(index + 4) == 82 && reader.getUint8(index + 5) == 61) {
+          hasColors = true;
+          colors = new Float32Array(faces * 3 * 3);
+          defaultR = reader.getUint8(index + 6) / 255;
+          defaultG = reader.getUint8(index + 7) / 255;
+          defaultB = reader.getUint8(index + 8) / 255;
+          alpha = reader.getUint8(index + 9) / 255;
+        }
+      }
+      const dataOffset = 84;
+      const faceLength = 12 * 4 + 2;
+      const geometry = new BufferGeometry();
+      const vertices = new Float32Array(faces * 3 * 3);
+      const normals = new Float32Array(faces * 3 * 3);
+      for (let face = 0; face < faces; face++) {
+        const start = dataOffset + face * faceLength;
+        const normalX = reader.getFloat32(start, true);
+        const normalY = reader.getFloat32(start + 4, true);
+        const normalZ = reader.getFloat32(start + 8, true);
+        if (hasColors) {
+          const packedColor = reader.getUint16(start + 48, true);
+          if ((packedColor & 32768) === 0) {
+            r = (packedColor & 31) / 31;
+            g = (packedColor >> 5 & 31) / 31;
+            b = (packedColor >> 10 & 31) / 31;
+          } else {
+            r = defaultR;
+            g = defaultG;
+            b = defaultB;
+          }
+        }
+        for (let i = 1; i <= 3; i++) {
+          const vertexstart = start + i * 12;
+          const componentIdx = face * 3 * 3 + (i - 1) * 3;
+          vertices[componentIdx] = reader.getFloat32(vertexstart, true);
+          vertices[componentIdx + 1] = reader.getFloat32(vertexstart + 4, true);
+          vertices[componentIdx + 2] = reader.getFloat32(vertexstart + 8, true);
+          normals[componentIdx] = normalX;
+          normals[componentIdx + 1] = normalY;
+          normals[componentIdx + 2] = normalZ;
+          if (hasColors) {
+            colors[componentIdx] = r;
+            colors[componentIdx + 1] = g;
+            colors[componentIdx + 2] = b;
+          }
+        }
+      }
+      geometry.setAttribute("position", new BufferAttribute(vertices, 3));
+      geometry.setAttribute("normal", new BufferAttribute(normals, 3));
+      if (hasColors) {
+        geometry.setAttribute("color", new BufferAttribute(colors, 3));
+        geometry.hasColors = true;
+        geometry.alpha = alpha;
+      }
+      return geometry;
+    }
+    function parseASCII(data2) {
+      const geometry = new BufferGeometry();
+      const patternSolid = /solid([\s\S]*?)endsolid/g;
+      const patternFace = /facet([\s\S]*?)endfacet/g;
+      let faceCounter = 0;
+      const patternFloat = /[\s]+([+-]?(?:\d*)(?:\.\d*)?(?:[eE][+-]?\d+)?)/.source;
+      const patternVertex = new RegExp("vertex" + patternFloat + patternFloat + patternFloat, "g");
+      const patternNormal = new RegExp("normal" + patternFloat + patternFloat + patternFloat, "g");
+      const vertices = [];
+      const normals = [];
+      const normal = new Vector3();
+      let result;
+      let groupCount = 0;
+      let startVertex = 0;
+      let endVertex = 0;
+      while ((result = patternSolid.exec(data2)) !== null) {
+        startVertex = endVertex;
+        const solid = result[0];
+        while ((result = patternFace.exec(solid)) !== null) {
+          let vertexCountPerFace = 0;
+          let normalCountPerFace = 0;
+          const text = result[0];
+          while ((result = patternNormal.exec(text)) !== null) {
+            normal.x = parseFloat(result[1]);
+            normal.y = parseFloat(result[2]);
+            normal.z = parseFloat(result[3]);
+            normalCountPerFace++;
+          }
+          while ((result = patternVertex.exec(text)) !== null) {
+            vertices.push(parseFloat(result[1]), parseFloat(result[2]), parseFloat(result[3]));
+            normals.push(normal.x, normal.y, normal.z);
+            vertexCountPerFace++;
+            endVertex++;
+          }
+          if (normalCountPerFace !== 1) {
+            console.error("THREE.STLLoader: Something isn't right with the normal of face number " + faceCounter);
+          }
+          if (vertexCountPerFace !== 3) {
+            console.error("THREE.STLLoader: Something isn't right with the vertices of face number " + faceCounter);
+          }
+          faceCounter++;
+        }
+        const start = startVertex;
+        const count = endVertex - startVertex;
+        geometry.addGroup(start, count, groupCount);
+        groupCount++;
+      }
+      geometry.setAttribute("position", new Float32BufferAttribute(vertices, 3));
+      geometry.setAttribute("normal", new Float32BufferAttribute(normals, 3));
+      return geometry;
+    }
+    function ensureString(buffer) {
+      if (typeof buffer !== "string") {
+        return decodeText(new Uint8Array(buffer));
+      }
+      return buffer;
+    }
+    function ensureBinary(buffer) {
+      if (typeof buffer === "string") {
+        const array_buffer = new Uint8Array(buffer.length);
+        for (let i = 0; i < buffer.length; i++) {
+          array_buffer[i] = buffer.charCodeAt(i) & 255;
+        }
+        return array_buffer.buffer || array_buffer;
+      } else {
+        return buffer;
+      }
+    }
+    const binData = ensureBinary(data);
+    return isBinary(binData) ? parseBinary(binData) : parseASCII(ensureString(data));
+  }
+}
+export {
+  STLLoader
+};
+//# sourceMappingURL=STLLoader.js.map