hi,
you cannot draw a single line, but you can simulate the effect using
backface culling.. here's a tip:
// all black material --> line material
SHLChunkPtr inkSHL = SHLChunk::create();
beginEditCP(inkSHL);
inkSHL->setVertexProgram(Utils::getFile("ink.vert"));
inkSHL->setFragmentProgram(Utils::getFile("ink.frag"));
endEditCP(inkSHL);
// model material -- here i wanted to archive a "toon" effect, thus the
"posterization" :)
SHLChunkPtr posterizeSHL = SHLChunk::create();
beginEditCP(posterizeSHL);
posterizeSHL->setVertexProgram(Utils::getFile("posterize.vert"));
posterizeSHL->setFragmentProgram(Utils::getFile("posterize.frag"));
endEditCP(posterizeSHL);
// important!
PolygonChunkPtr backfaceCullingChunk = PolygonChunk::create();
beginEditCP(backfaceCullingChunk);
backfaceCullingChunk->setCullFace(GL_FRONT);
backfaceCullingChunk->setOffsetFill(true);
backfaceCullingChunk->setOffsetFactor(0.4);
backfaceCullingChunk->setOffsetBias(-10.0);
endEditCP(backfaceCullingChunk);
ChunkMaterialPtr inkMT = ChunkMaterial::create();
beginEditCP(inkMT);
inkMT->addChunk(inkSHL);
inkMT->addChunk(backfaceCullingChunk);
endEditCP(inkMT);
ChunkMaterialPtr posterizeMT = ChunkMaterial::create();
beginEditCP(posterizeMT);
posterizeMT->addChunk(posterizeSHL);
endEditCP(posterizeMT);
// multipass --> to draw both the model and the "lines"
MultiPassMaterialPtr mp = MultiPassMaterial::create();
beginEditCP(mp);
mp->addMaterial(inkMT);
mp->addMaterial(posterizeMT);
endEditCP(mp);
MaterialGroupPtr mg = MaterialGroup::create();
beginEditCP(mg);
mg->setMaterial(mp);
endEditCP(mg);
NodePtr n = Node::create();
beginEditCP(n);
n->setCore(mg);
n->addChild(SceneFileHandler::the().read( "dinopet.3ds" ));
endEditCP(n);
hope this helps!
2007/6/28, Adrien <[EMAIL PROTECTED]>:
Hi again,
one more question.
Is there a simple way to only draw the outline of an object?
If a use a PolygonChunk it draws all the lines of all the triangles of
my object§.
I'd like to have just one line drawing the outer line of my object
depending on
the camera viewport.
Is it possible easily?
Thanks,
Adrien
-------------------------------------------------------------------------
This SF.net email is sponsored by DB2 Express
Download DB2 Express C - the FREE version of DB2 express and take
control of your XML. No limits. Just data. Click to get it now.
http://sourceforge.net/powerbar/db2/
_______________________________________________
Opensg-users mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/opensg-users
--
Stefano Verna
mail/gtalk: [EMAIL PROTECTED]
skype: steffoz
-------------------------------------------------------------------------
This SF.net email is sponsored by DB2 Express
Download DB2 Express C - the FREE version of DB2 express and take
control of your XML. No limits. Just data. Click to get it now.
http://sourceforge.net/powerbar/db2/
_______________________________________________
Opensg-users mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/opensg-users
