ianmackenzie/elm-3d-scene

Add support for silhouette edges

ianmackenzie opened this issue · 2 comments

ianmackenzie commented

Should be able to reuse much of the shadow edges logic to tag lines with their adjacent face normals, then only render silhouette edges

ianmackenzie commented

Similar to Mesh.shadow, might be able to have

Mesh.silhouette : Mesh coordinates a -> Silhouette coordinates

and then Scene3d.silhouette, Scene3d.withSilhouette etc.

ianmackenzie commented

Possibly useful: use trick described in http://www.terathon.com/gdc07_lengyel.pdf to adjust depth calculation, instead of using actual polygon offset