Open Access
Fig. 1.

Download original image
Parametrization of a quadrilateral using the ×-projection. Equivalent to Fig. (1) from P25 by defining ϕ12 = ψ12 and ϕ13 = ψ12 + ψ23.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.