Method camera

src/webgl/p5.Camera.js:1067–1129

* Sets the position and orientation of the camera. * * `myCamera.camera()` allows objects to be viewed from different angles. It * has nine parameters that are all optional. * * The first three parameters, `x`, `y`, and `z`, are the coordinates of the * camera’s position in "world"

(
    eyeX,
    eyeY,
    eyeZ,
    centerX,
    centerY,
    centerZ,
    upX,
    upY,
    upZ
  )

   * }
   */
  camera(
    eyeX,
    eyeY,
    eyeZ,
    centerX,
    centerY,
    centerZ,
    upX,
    upY,
    upZ
  ) {
    if (typeof eyeX === 'undefined') {
      eyeX = this.defaultEyeX;
      eyeY = this.defaultEyeY;
      eyeZ = this.defaultEyeZ;
      centerX = eyeX;
      centerY = eyeY;
      centerZ = 0;
      upX = 0;
      upY = 1;
      upZ = 0;
    }

    this.eyeX = eyeX;
    this.eyeY = eyeY;
    this.eyeZ = eyeZ;

    if (typeof centerX !== 'undefined') {
      this.centerX = centerX;
      this.centerY = centerY;
      this.centerZ = centerZ;
    }

    if (typeof upX !== 'undefined') {
      this.upX = upX;
      this.upY = upY;
      this.upZ = upZ;
    }

    const local = this._getLocalAxes();

    // the camera affects the model view matrix, insofar as it
    // inverse translates the world to the eye position of the camera
    // and rotates it.

    this.cameraMatrix.set(local.x[0], local.y[0], local.z[0], 0,
      local.x[1], local.y[1], local.z[1], 0,
      local.x[2], local.y[2], local.z[2], 0,
      0, 0, 0, 1);


    const tx = -eyeX;
    const ty = -eyeY;
    const tz = -eyeZ;

    this.cameraMatrix.translate([tx, ty, tz]);

    if (this._isActive()) {