I have neat-looking haystack-y objects which use LineArray geometry. I'd like
to make some of them glow-y and others dim. Normally I'd use an emissiveColor
in a Material in an Appearance to achieve this effec, but it won't let
me set the Appearance on the Shape3D because I don't have normals. First
of all, my mathematical intuition tells me lines don't have normals; second,
this is supported by the fact that NormalGenerator needs a GeometryInfo
and GeometryInfo doesn't do LineArrays.
So... I conclude that you effectively can't use Materials with LineArrays,
and the COLOR_3 I provide in the LineArray is some undocumented mixture of
emissive and diffuse color? -Tim
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