GLuint GLODMesh::createObject( const LODSettings& lodsettings )
{
// check if object is already created
assert( ( _lodGroupName == 0 ) && "LOD object has already been created!" );
// make a local copy of lod settings object
_p_lodSettings = new LODSettings( lodsettings );
// first create a group
createGroupName();
_lodObjectName = s_lodObject;
++s_lodObject;
glodNewObject( _lodGroupName, _lodObjectName, _p_lodSettings->getMode() );
// create one single vertex array out of exsiting triangles and triangle strips
osg::Vec3Array* p_vertarray = new osg::Vec3Array();
osg::IndexArray* p_indexarray = new osg::UShortArray();
osg::IndexArray* p_indices = _p_geometry->getVertexIndices();
unsigned int numPrims = _p_geometry->getNumPrimitiveSets();
{
for ( unsigned int primcnt = 0; primcnt < numPrims; ++primcnt )
{
osg::PrimitiveSet* p_set = _p_geometry->getPrimitiveSet( primcnt );
switch( p_set->getMode() )
{
case osg::PrimitiveSet::TRIANGLES:
buildObjectTrianlge( p_set, p_indices );
break;
default:
{
log_warning << "unsupported primitive for building LOD, only TRIANGLES supported" << std::endl;
continue;
}
}
}
}
return _lodObjectName;
}
void create_glod_object_from_vertex_buffers(S32 object, S32 group, std::vector<LLPointer <LLVertexBuffer> >& vertex_buffers)
{
glodNewGroup(group);
stop_gloderror();
glodNewObject(object, group, GLOD_DISCRETE);
stop_gloderror();
for (U32 i = 0; i < vertex_buffers.size(); ++i)
{
vertex_buffers[i]->setBuffer(LLVertexBuffer::MAP_VERTEX | LLVertexBuffer::MAP_NORMAL | LLVertexBuffer::MAP_TEXCOORD0);
U32 num_indices = vertex_buffers[i]->getNumIndices();
if (num_indices > 2)
{
glodInsertElements(object, i, GL_TRIANGLES, num_indices, GL_UNSIGNED_SHORT,
vertex_buffers[i]->getIndicesPointer(), 0, 0.f);
}
stop_gloderror();
}
glodBuildObject(object);
stop_gloderror();
}
