Fig. 7
From: Nets of Lines with the Combinatorics of the Square Grid and with Touching Inscribed Conics
The central projection \(f_i:l_{i-1} \rightarrow l_i\) is defined in the proof of Theorem 3.1. In the first case, the centre is \(r_i\). In the second case, the centre is \(r^*_i\)