Method constructor

src/math/p5.Vector.js:72–111

(...args)

  // This is how it comes in with createVector()
  // This check if the first argument is a function
  constructor(...args) {

    if (args.length === 0) {
      this._friendlyError(
        'Requires valid arguments.', 'p5.Vector'
      );
    }

    if (typeof args[0] === 'function') {
      this.isPInst = true;
      this._fromRadians = args.shift();
      this._toRadians = args.shift();
    }

    this.values = args;
    if (Array.isArray(args)) {
      for (let i = 0; i < args.length; i++) {
        const v = args[i];
        if (typeof v !== 'number' || !Number.isFinite(v)) {
          if (!Vector.friendlyErrorsDisabled()) {
            this._friendlyError(
              'Arguments contain non-finite numbers',
              'p5.Vector'
            );
          }
          this.values = [];
          break;
        }
      }
    } else {
      this.values = [];
    }

    // This property is here where duck typing (checking if obj.isVector) needs
    // to be used over more standard type checking (obj instanceof Vector). This
    // needs to happen where we are building multiple files, such as in p5.webgpu.js,
    // where if we `import { Vector }` directly, it will be a separate copy of the
    // Vector class from the one imported in the main p5.js bundle.
    this.isVector = true;
  }

  // This will get overwritten when exported as part of p5.
  _friendlyError(_e) {}