Panda3D
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00001 // Filename: nodeCullCallbackData.cxx 00002 // Created by: drose (13Mar09) 00003 // 00004 //////////////////////////////////////////////////////////////////// 00005 // 00006 // PANDA 3D SOFTWARE 00007 // Copyright (c) Carnegie Mellon University. All rights reserved. 00008 // 00009 // All use of this software is subject to the terms of the revised BSD 00010 // license. You should have received a copy of this license along 00011 // with this source code in a file named "LICENSE." 00012 // 00013 //////////////////////////////////////////////////////////////////// 00014 00015 #include "nodeCullCallbackData.h" 00016 #include "callbackNode.h" 00017 #include "cullTraverser.h" 00018 #include "cullTraverserData.h" 00019 #include "cullableObject.h" 00020 #include "cullHandler.h" 00021 00022 TypeHandle NodeCullCallbackData::_type_handle; 00023 00024 //////////////////////////////////////////////////////////////////// 00025 // Function: NodeCullCallbackData::output 00026 // Access: Published, Virtual 00027 // Description: 00028 //////////////////////////////////////////////////////////////////// 00029 void NodeCullCallbackData:: 00030 output(ostream &out) const { 00031 out << get_type() << "(" << (void *)_trav << ", " << (void *)&_data << ")"; 00032 } 00033 00034 //////////////////////////////////////////////////////////////////// 00035 // Function: NodeCullCallbackData::upcall 00036 // Access: Published, Virtual 00037 // Description: You should make this call during the callback if you 00038 // want to continue the normal rendering function that 00039 // would have been done in the absence of a callback. 00040 // 00041 // Specifically, this method will add this node to the 00042 // draw queue, and continue the cull traversal for all 00043 // the nodes below. If you omit this call, this node 00044 // and its children will be pruned from the render 00045 // result. 00046 //////////////////////////////////////////////////////////////////// 00047 void NodeCullCallbackData:: 00048 upcall() { 00049 PandaNode *node = _data.node(); 00050 if (node->is_of_type(CallbackNode::get_class_type())) { 00051 CallbackNode *cbnode = DCAST(CallbackNode, _data.node()); 00052 00053 // OK, render this node. Rendering a CallbackNode means creating 00054 // a CullableObject for the draw_callback, if any. We don't need 00055 // to pass any Geoms, however. 00056 CallbackObject *cbobj = cbnode->get_draw_callback(); 00057 if (cbobj != (CallbackObject *)NULL) { 00058 CullableObject *object = 00059 new CullableObject(NULL, _data._state, 00060 _data.get_net_transform(_trav), 00061 _data.get_modelview_transform(_trav), 00062 _trav->get_gsg()); 00063 object->set_draw_callback(cbobj); 00064 _trav->get_cull_handler()->record_object(object, _trav); 00065 } 00066 } 00067 00068 // Now traverse below. 00069 _trav->traverse_below(_data); 00070 }