mdx-m3-viewer/src/parsers/w3x/wpm/file.js

A browser WebGL model viewer. Mainly focused on models of the games Warcraft 3 and Starcraft 2.

import BinaryStream from '../../../common/binarystream';

/**
 * war3map.wpm - the pathing file.
 */
export default class War3MapWpm {
  /**
   * @param {?ArrayBuffer} buffer
   */
  constructor(buffer) {
    /** @member {number} */
    this.version = 0;
    /** @member {number} */
    this.size = new Int32Array(2);
    /** @member {Uint8Array} */
    this.pathing = new Uint8Array(1);

    if (buffer) {
      this.load(buffer);
    }
  }

  /**
   * @param {ArrayBuffer} buffer
   * @return {boolean}
   */
  load(buffer) {
    let stream = new BinaryStream(buffer);

    if (stream.read(4) !== 'MP3W') {
      return false;
    }

    this.version = stream.readInt32();
    this.size = stream.readInt32Array(2);
    this.pathing = stream.readUint8Array(this.size[0] * this.size[1]);

    return true;
  }

  /**
   * @return {ArrayBuffer}
   */
  save() {
    let buffer = new ArrayBuffer(this.getByteLength());
    let stream = new BinaryStream(buffer);

    stream.write('MP3W');
    stream.writeInt32(this.version);
    stream.writeInt32Array(this.size);
    stream.writeUint8Array(this.pathing);

    return buffer;
  }

  /**
   * @return {number}
   */
  getByteLength() {
    return 16 + (this.size[0] * this.size[1]);
  }
}