Projector constructor

Projector(double yaw, double tilt, double cx, double cy, double scale,)

Implementation

Projector(double yaw, double tilt, this.cx, this.cy, this.scale)
  : _st = math.sin(tilt),
    _ct = math.cos(tilt),
    _sy = math.sin(yaw),
    _cyw = math.cos(yaw);