Edge lists silently not exported with Ogre > 1.9

[shedatc]

I'm trying to render a basic scene using Ogre 13.3.1 but shadows are missing:

The scene is built using Blender 3.0.1 and exported with the Edge lists box checked:

Ogre's shadow technique is set to SHADOWTYPE_STENCIL_ADDITIVE (see setupShadows in sandbox/src/Bootstrap.cpp).

Explicitly calling buildEdgeList (see setupScene in sandbox/src/Bootstrap.cpp) trigger shadow rendering:

What did I miss?

Source code and material: sandbox.tar.gz

[paroj]

this is currently not implemented for Ogre > 1.9. This functionality was removed from OgreXMLConverter and we would need to call OgreMeshUpgrader separately to generate the edge-lists.

[shedatc]

IIUC, the Edge Lists checkbox silently do nothing when OgreXMLConverter is taken from Ogre > 1.9, right? And manually using OgreMeshUpgrader will add the edge lists to the mesh, preventing me from having call buildEdgeList, still right?

[shedatc]

And manually using OgreMeshUpgrader will add the edge lists to the mesh, preventing me from having call buildEdgeList, still right?

Replying to myself: manually calling OgreMeshUpgrader on the .mesh file properly generate the edge lists:

…
Generating edge lists...
Generating edge lists... success
MeshSerializer writing mesh data to stream Grid.001.mesh...
…
Exporting edge lists...
Edge lists exported
…

[shedatc]

Also note that the Use OgreMesh Tools checkbox (under the LOD panel) was checked. So I'll investigate the possibility blender2ogre just didn't call OgreMeshUpgrader.

[sercero]

@shedatc blender2ogre calls OgreMeshUpgrader when that box is ticked, but with the unintuitive -e option (DON'T generate edge lists).

blender2ogre/io_ogre/util.py

Lines 111 to 112 in 6f73e4e

	# Edge lists should be generated (or not) by mesh.py, not OgreMeshUpgrader
	cmd.append('-e')

It seems that at some point blender2ogre created the Edge Lists directly from mesh.py, but I can't find that kind of code anywhere in mesh.py

[sercero]

This is solved by #162