How to genreate edge lists for a mesh?

[playerwing]

I have some problems of edge lists, I wanna use them to generate stencil shadow.....

1) How to generate edge lists of a mesh manually?

2)How to assoicate edge lists to a mesh ?

Please help me!

[AssiDragon]

Now I probably shouldn't say this after my lame thread just below this one, but this question has been raised like... many times. ^_^
http://ogrewiki.digitalsentience.com/in ... VertexData

And why not make OGRE do the stencil shadows? :/

[playerwing]

Thank you.

My mesh file has not edge lists, but OGRE do the stencil shadow need it.
I wanna try generate edge lists......

help help........

[monster]

So, you mean you have a mesh which you would like to cast stencil shadows, but the edge lists haven't been built?

In which case, just call "buildEdgeList" on the mesh and Ogre will do it for you.

Or, do you mean you want to manually calculate the edge lists? In which case, don't. Let Ogre do it for you, see above.

If you still want to create the edge lists yourself, then look at the Ogre code and see how it's done there, then plug in whatever calculation methods you like.

[playerwing]

Thank you Monster!!!!

I have called Mesh::buildEdgeList(), but I can not see shadow yet.
( I use Demo_Shadows ( Ogre sample ) to test Mesh::bulidEdgeList(), still failed.)

why...?

Code: Select all

-----------------------------------
Details:
-----------------------------------
Error #: 6
Function: EdgeListBuilder::createEdge
Description: Edge is shared by too many triangles. 
File: D:\My Space\OGRE\ogrenew_CVS\OgreMain\src\OgreEdgeListBuilder.cpp
Line: 468
Stack unwinding: <<beginning of stack>>
11:50:40: RECOVERY: attempting to find valid hull by assuming all individual submeshes are manifold with their own geometry...
11:50:40: An exception has been thrown!


-----------------------------------
Details:
-----------------------------------
Error #: 6
Function: EdgeListBuilder::createEdge
Description: Edge is shared by too many triangles. 
File: D:\My Space\OGRE\ogrenew_CVS\OgreMain\src\OgreEdgeListBuilder.cpp
Line: 468
Stack unwinding: <<beginning of stack>>
11:50:40: WARNING: edge calculation process detected ambiguous hull. This is almost certainly going to result in stencil shadow artefacts.

[AssiDragon]

As far as I know, that message is thrown when you have edge(s) in the modell that have more than two triangles.

[playerwing]

thanks

[Banania]

maybe you can try Ogre 0.15.2. I understand there were some improvements to the edge list building.

[playerwing]

thank you~~~~~!!