addshadowvolumescenenode and stencil buffer conflicts.

[lvgeng]

In my project I use stencil buffer to mask the entire rendering zone, as follow,

Code: Select all

 
IAnimatedMeshSceneNode* meshOneModel = sceneManager->addAnimatedMeshSceneNode(mesh);
meshOneModel->setMaterialFlag(EMF_LIGHTING, true);
meshOneModel->addShadowVolumeSceneNode();
meshOneModel->setMaterialFlag(EMF_NORMALIZE_NORMALS, true);
 

Code: Select all

 
glClearStencil(0);
glClear(GL_STENCIL_BUFFER_BIT);
glStencilFunc(GL_NEVER, 0x1, 0x1);
glStencilOp(GL_REPLACE, GL_REPLACE, GL_REPLACE);
videoDriver->draw2DRectangle( video::SColor(255,255,255,255), core::rect<s32>(0,0,200,200) );
 

It appears that the shadow is generated using stencil buffer so there is a conflict. The entire zone masked by the stencil buffer is shadowed so the brightness is quite low. Is there any way to make shadows work properly while I am using stencil buffer?

PS: I know that the stencil buffer is at least 8 bits, so is it possible for me to use part of it to mask the rendering zone, while not affecting the stencil shadows?