/// <summary>
        /// この関数は,cameraオブジェクトにProjectionMatrixを指定します.
        /// </summary>
        public void setARCameraProjection(Camera i_camera)
        {
            NyARFrustum f = this.getFrustum();

            NyARFrustum.PerspectiveParam pp = f.getPerspectiveParam(new NyARFrustum.PerspectiveParam());
            //setup camera projection
            i_camera.nearClipPlane = (float)pp.near;
            i_camera.farClipPlane  = (float)pp.far;
            i_camera.fieldOfView   = (float)(360 * pp.fovy / (2 * Math.PI));
            i_camera.aspect        = (float)(pp.aspect);
            i_camera.transform.LookAt(new Vector3(0, 0, 0), new Vector3(1, 0, 0));
        }