341     NW_ASSERT(resSkeleton.IsValid());  in SetModelMatrixForSkeletalModel()
451         NW_ASSERT(description.IsValid());  in ActivateShaderProgram()
459             if ( previousDescription.IsValid() &&  in ActivateShaderProgram()
529         NW_ASSERT(this->m_SceneEnvironment.GetActiveFog()->GetResFog().IsValid());  in ActivateFog()
530         NW_ASSERT(this->m_SceneEnvironment.GetActiveFog()->GetResFog().GetFogSampler().IsValid());  in ActivateFog()
575             NW_ASSERT(resLight.IsValid());  in ActivateHemiSphereLight()
623     NW_ASSERT(resLight.IsValid());  in ActivateFragmentLight()
652             && resLight.GetDistanceSampler().IsValid() )  in ActivateFragmentLight()
676 …NW_ASSERTMSG(resLight.GetAngleSampler().IsValid(), "The spot light must contain angle sampler(look…  in ActivateFragmentLight()
677 …NW_ASSERTMSG(resLight.GetAngleSampler().GetSampler().IsValid(), "The spot light must contain angle…  in ActivateFragmentLight()
679         if (resLight.GetAngleSampler().IsValid())  in ActivateFragmentLight()
689             && resLight.GetDistanceSampler().IsValid())  in ActivateFragmentLight()
759         NW_ASSERT(resLight.IsValid());  in ActivateVertexLight()
871     NW_ASSERT(primitive.IsValid());  in RenderPrimitive()