(v+ .(vpow ..(v- pos ...(height-normal ....(vconcat [-1.585 -0.1761] .....(checker -2.9351 ......(vmod .......(vcos pos) .......(vconcat [-2.0447 -0.5595 -0.6984 -1.4508] ........(square [-2.9938 -0.4233]))))))) -0.9361) [-2.8016 0.577 -1.2097 -1.767])