PerspectiveCamera(Point3 center, Vector3 forward, Vector3 up, num vertOpeningAngle, Vector2 _res)

Creates a new PerspectiveCamera. Uses a forward vector.

Source 

PerspectiveCamera(Point3 center, Vector3 this.forward, Vector3 up, num vertOpeningAngle, Vector2 this._res) {
  _init(center, up, vertOpeningAngle);

  print("Created new PerspectiveCamera:");
  print(" - resolution: $res");
  print(" - center: $center");
  print(" - forward: $forward");
  print(" - up: $up");
  print(" - right: $right");
  print(" - topLeft: $topLeft");
  print(" - stepX: $stepX");
  print(" - stepY: $stepY");
}