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multitexReducer.I
00001 // Filename: multitexReducer.I
00002 // Created by:  drose (30Nov04)
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 
00016 ////////////////////////////////////////////////////////////////////
00017 //     Function: MultitexReducer::scan
00018 //       Access: Published
00019 //  Description: Starts scanning the hierarchy beginning at the
00020 //               indicated node.  Any GeomNodes discovered in the
00021 //               hierarchy with multitexture will be added to internal
00022 //               structures in the MultitexReducer so that a future
00023 //               call to flatten() will operate on all of these at
00024 //               once.
00025 //
00026 //               This version of this method does not accumulate state
00027 //               from the parents of the indicated node; thus, only
00028 //               multitexture effects that have been applied at node
00029 //               and below will be considered.
00030 ////////////////////////////////////////////////////////////////////
00031 INLINE void MultitexReducer::
00032 scan(const NodePath &node) {
00033   scan(node.node(), RenderState::make_empty(), TransformState::make_identity());
00034 }
00035 
00036 ////////////////////////////////////////////////////////////////////
00037 //     Function: MultitexReducer::scan
00038 //       Access: Published
00039 //  Description: Starts scanning the hierarchy beginning at the
00040 //               indicated node.  Any GeomNodes discovered in the
00041 //               hierarchy with multitexture will be added to internal
00042 //               structures in the MultitexReducer so that a future
00043 //               call to flatten() will operate on all of these at
00044 //               once.
00045 //
00046 //               The second parameter represents the NodePath from
00047 //               which to accumulate the state that is considered for
00048 //               the multitexture.  Pass an empty NodePath to
00049 //               accumulate all the state from the root of the graph,
00050 //               or you may specify some other node here in order to
00051 //               not consider nodes above that as contributing to the
00052 //               state to be flattened.  This is particularly useful
00053 //               if you have some texture stage which is applied
00054 //               globally to a scene (for instance, a caustics
00055 //               effect), which you don't want to be considered for
00056 //               flattening by the MultitexReducer.
00057 ////////////////////////////////////////////////////////////////////
00058 INLINE void MultitexReducer::
00059 scan(const NodePath &node, const NodePath &state_from) {
00060   scan(node.node(), node.get_parent().get_state(state_from), 
00061        node.get_parent().get_transform(state_from));
00062 }
00063 
00064 ////////////////////////////////////////////////////////////////////
00065 //     Function: MultitexReducer::StageInfo::operator <
00066 //       Access: Public
00067 //  Description: 
00068 ////////////////////////////////////////////////////////////////////
00069 INLINE bool MultitexReducer::StageInfo::
00070 operator < (const MultitexReducer::StageInfo &other) const {
00071   if (_stage != other._stage) {
00072     return _stage < other._stage;
00073   }
00074   if (_tex != other._tex) {
00075     return _tex < other._tex;
00076   }
00077   if (_tex_mat != other._tex_mat) {
00078     return _tex_mat->compare_to(*other._tex_mat, true) < 0;
00079   }
00080 
00081   return false;
00082 }
00083 
00084 ////////////////////////////////////////////////////////////////////
00085 //     Function: MultitexReducer::GeomInfo::Constructor
00086 //       Access: Public
00087 //  Description: 
00088 ////////////////////////////////////////////////////////////////////
00089 INLINE MultitexReducer::GeomInfo::
00090 GeomInfo(const RenderState *state, const RenderState *geom_net_state,
00091          GeomNode *geom_node, int index) :
00092   _state(state),
00093   _geom_net_state(geom_net_state),
00094   _geom_node(geom_node),
00095   _index(index)
00096 {
00097 }
00098 
00099 ////////////////////////////////////////////////////////////////////
00100 //     Function: MultitexReducer::GeomNodeInfo::Constructor
00101 //       Access: Public
00102 //  Description: 
00103 ////////////////////////////////////////////////////////////////////
00104 INLINE MultitexReducer::GeomNodeInfo::
00105 GeomNodeInfo(const RenderState *state, GeomNode *geom_node) :
00106   _state(state),
00107   _geom_node(geom_node)
00108 {
00109 }
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