simsite/frontend/node_modules/three-stdlib/loaders/VOXLoader.js

import { Loader, FileLoader, Mesh, BufferGeometry, Float32BufferAttribute, MeshStandardMaterial, RedFormat, NearestFilter, LinearFilter } from "three";
import { Data3DTexture } from "../_polyfill/Data3DTexture.js";
class VOXLoader extends Loader {
  load(url, onLoad, onProgress, onError) {
    const scope = this;
    const loader = new FileLoader(scope.manager);
    loader.setPath(scope.path);
    loader.setResponseType("arraybuffer");
    loader.setRequestHeader(scope.requestHeader);
    loader.load(
      url,
      function(buffer) {
        try {
          onLoad(scope.parse(buffer));
        } catch (e) {
          if (onError) {
            onError(e);
          } else {
            console.error(e);
          }
          scope.manager.itemError(url);
        }
      },
      onProgress,
      onError
    );
  }
  parse(buffer) {
    const data = new DataView(buffer);
    const id = data.getUint32(0, true);
    const version = data.getUint32(4, true);
    if (id !== 542658390 || version !== 150) {
      console.error("Not a valid VOX file");
      return;
    }
    const DEFAULT_PALETTE = [
      0,
      4294967295,
      4291624959,
      4288282623,
      4284940287,
      4281597951,
      4278255615,
      4294954239,
      4291611903,
      4288269567,
      4284927231,
      4281584895,
      4278242559,
      4294941183,
      4291598847,
      4288256511,
      4284914175,
      4281571839,
      4278229503,
      4294928127,
      4291585791,
      4288243455,
      4284901119,
      4281558783,
      4278216447,
      4294915071,
      4291572735,
      4288230399,
      4284888063,
      4281545727,
      4278203391,
      4294902015,
      4291559679,
      4288217343,
      4284875007,
      4281532671,
      4278190335,
      4294967244,
      4291624908,
      4288282572,
      4284940236,
      4281597900,
      4278255564,
      4294954188,
      4291611852,
      4288269516,
      4284927180,
      4281584844,
      4278242508,
      4294941132,
      4291598796,
      4288256460,
      4284914124,
      4281571788,
      4278229452,
      4294928076,
      4291585740,
      4288243404,
      4284901068,
      4281558732,
      4278216396,
      4294915020,
      4291572684,
      4288230348,
      4284888012,
      4281545676,
      4278203340,
      4294901964,
      4291559628,
      4288217292,
      4284874956,
      4281532620,
      4278190284,
      4294967193,
      4291624857,
      4288282521,
      4284940185,
      4281597849,
      4278255513,
      4294954137,
      4291611801,
      4288269465,
      4284927129,
      4281584793,
      4278242457,
      4294941081,
      4291598745,
      4288256409,
      4284914073,
      4281571737,
      4278229401,
      4294928025,
      4291585689,
      4288243353,
      4284901017,
      4281558681,
      4278216345,
      4294914969,
      4291572633,
      4288230297,
      4284887961,
      4281545625,
      4278203289,
      4294901913,
      4291559577,
      4288217241,
      4284874905,
      4281532569,
      4278190233,
      4294967142,
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      4281597798,
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      4294901862,
      4291559526,
      4288217190,
      4284874854,
      4281532518,
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      4278190114,
      4278190097,
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      4278237952,
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      4278220544,
      4278211840,
      4278207488,
      4278198784,
      4278194432,
      4293787648,
      4292673536,
      4290445312,
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      4285988864,
      4283760640,
      4282646528,
      4280418304,
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      4292730333,
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      4286019447,
      4283782485,
      4282664004,
      4280427042,
      4279308561
    ];
    let i = 8;
    let chunk;
    const chunks = [];
    while (i < data.byteLength) {
      let id2 = "";
      for (let j = 0; j < 4; j++) {
        id2 += String.fromCharCode(data.getUint8(i++));
      }
      const chunkSize = data.getUint32(i, true);
      i += 4;
      i += 4;
      if (id2 === "SIZE") {
        const x = data.getUint32(i, true);
        i += 4;
        const y = data.getUint32(i, true);
        i += 4;
        const z = data.getUint32(i, true);
        i += 4;
        chunk = {
          palette: DEFAULT_PALETTE,
          size: { x, y, z }
        };
        chunks.push(chunk);
        i += chunkSize - 3 * 4;
      } else if (id2 === "XYZI") {
        const numVoxels = data.getUint32(i, true);
        i += 4;
        chunk.data = new Uint8Array(buffer, i, numVoxels * 4);
        i += numVoxels * 4;
      } else if (id2 === "RGBA") {
        const palette = [0];
        for (let j = 0; j < 256; j++) {
          palette[j + 1] = data.getUint32(i, true);
          i += 4;
        }
        chunk.palette = palette;
      } else {
        i += chunkSize;
      }
    }
    return chunks;
  }
}
class VOXMesh extends Mesh {
  constructor(chunk) {
    const data = chunk.data;
    const size = chunk.size;
    const palette = chunk.palette;
    const vertices = [];
    const colors = [];
    const nx = [0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 1, 1, 0, 1, 0, 0, 0, 1];
    const px = [1, 0, 0, 1, 1, 0, 1, 0, 1, 1, 1, 1, 1, 0, 1, 1, 1, 0];
    const py = [0, 0, 1, 1, 0, 1, 0, 1, 1, 1, 1, 1, 0, 1, 1, 1, 0, 1];
    const ny = [0, 0, 0, 0, 1, 0, 1, 0, 0, 1, 1, 0, 1, 0, 0, 0, 1, 0];
    const nz = [0, 0, 1, 0, 0, 0, 1, 0, 1, 1, 0, 0, 1, 0, 1, 0, 0, 0];
    const pz = [0, 1, 1, 1, 1, 1, 0, 1, 0, 1, 1, 0, 0, 1, 0, 1, 1, 1];
    function add(tile, x, y, z, r, g, b) {
      x -= size.x / 2;
      y -= size.z / 2;
      z += size.y / 2;
      for (let i = 0; i < 18; i += 3) {
        vertices.push(tile[i + 0] + x, tile[i + 1] + y, tile[i + 2] + z);
        colors.push(r, g, b);
      }
    }
    const offsety = size.x;
    const offsetz = size.x * size.y;
    const array = new Uint8Array(size.x * size.y * size.z);
    for (let j = 0; j < data.length; j += 4) {
      const x = data[j + 0];
      const y = data[j + 1];
      const z = data[j + 2];
      const index = x + y * offsety + z * offsetz;
      array[index] = 255;
    }
    let hasColors = false;
    for (let j = 0; j < data.length; j += 4) {
      const x = data[j + 0];
      const y = data[j + 1];
      const z = data[j + 2];
      const c = data[j + 3];
      const hex = palette[c];
      const r = (hex >> 0 & 255) / 255;
      const g = (hex >> 8 & 255) / 255;
      const b = (hex >> 16 & 255) / 255;
      if (r > 0 || g > 0 || b > 0)
        hasColors = true;
      const index = x + y * offsety + z * offsetz;
      if (array[index + 1] === 0 || x === size.x - 1)
        add(px, x, z, -y, r, g, b);
      if (array[index - 1] === 0 || x === 0)
        add(nx, x, z, -y, r, g, b);
      if (array[index + offsety] === 0 || y === size.y - 1)
        add(ny, x, z, -y, r, g, b);
      if (array[index - offsety] === 0 || y === 0)
        add(py, x, z, -y, r, g, b);
      if (array[index + offsetz] === 0 || z === size.z - 1)
        add(pz, x, z, -y, r, g, b);
      if (array[index - offsetz] === 0 || z === 0)
        add(nz, x, z, -y, r, g, b);
    }
    const geometry = new BufferGeometry();
    geometry.setAttribute("position", new Float32BufferAttribute(vertices, 3));
    geometry.computeVertexNormals();
    const material = new MeshStandardMaterial();
    if (hasColors) {
      geometry.setAttribute("color", new Float32BufferAttribute(colors, 3));
      material.vertexColors = true;
    }
    super(geometry, material);
  }
}
class VOXData3DTexture extends Data3DTexture {
  constructor(chunk) {
    const data = chunk.data;
    const size = chunk.size;
    const offsety = size.x;
    const offsetz = size.x * size.y;
    const array = new Uint8Array(size.x * size.y * size.z);
    for (let j = 0; j < data.length; j += 4) {
      const x = data[j + 0];
      const y = data[j + 1];
      const z = data[j + 2];
      const index = x + y * offsety + z * offsetz;
      array[index] = 255;
    }
    super(array, size.x, size.y, size.z);
    this.format = RedFormat;
    this.minFilter = NearestFilter;
    this.magFilter = LinearFilter;
    this.unpackAlignment = 1;
    this.needsUpdate = true;
  }
}
export {
  VOXData3DTexture,
  VOXLoader,
  VOXMesh
};
//# sourceMappingURL=VOXLoader.js.map