if (Skinned)SubGeometry does not have uv's, SubGeometry.updateFaceTangents crashes.

[david-gregory]

One could argue that this isn't a bug. But it is entirely possible to get SkinnedSubGeometry with a ColorMaterial rather than a BitmapMaterial.

If that is the case, uv data may not be set in the geometry. If you play an animation, a crash happens on line 697:
v0 = _uvs[uint((index1 << 1) + 1)];

_uvs is null.

Main Thread (Suspended: TypeError: Error #1009: Cannot access a property or method of a null object reference.)

• away3d.core.base::SubGeometry/updateFaceTangents
• away3d.core.base::SubGeometry/updateVertexTangents
• away3d.core.base::SubGeometry/get vertexTangentData
• away3d.animators.data::SkeletonAnimationState/morphGeometry
• away3d.animators.data::SkeletonAnimationState/setRenderState
• away3d.materials::MaterialBase/renderPass
• away3d.core.render::DefaultRenderer/drawRenderables
• away3d.core.render::DefaultRenderer/draw
• away3d.core.render::RendererBase/executeRender
• away3d.core.render::RendererBase/render
• away3d.core.render::DefaultRenderer/render
• away3d.containers::View3D/render

[DerSchmale]

Which is the usecase where updateFaceTangents is called and uvs aren't present? That method should only be called when a normal map is used, for which uvs are required.

[david-gregory]

I got it to happen simply by attempting to play an animation. Not having uv data was a result of the collada model being flat shaded, not textured. To be clear, it did not have a normal map.