Add 2D triangulation plot

It would be very useful for me adding a new chart type to deal with 2D triangulation (or mesh).

At the current implementation, I found different workarounds but with some limitations:

• the heatmap graph is only for data in grid format
• the mesh3d graph shows three dimensions and it manages also the lights, resulting for my purpose too complex (and expensive)
• the basic scatter plot allows me to draw a single triangle, but if I try for many triangles (>10k) the function is extremely expensive.

I apologize in advance if this feature is already implemented and I missed it.

Commencez par examiner les implémentations existantes des graphiques heatmap, mesh3d et scatter afin de comprendre leurs limitations en matière de données et de rendu. Définissez les entrées attendues pour une triangulation 2D ou un maillage, le comportement du rendu et l’objectif de performance pour un grand nombre de triangles avant de proposer le nouveau type de graphique.