110 lines
3.7 KiB
C++
110 lines
3.7 KiB
C++
// Filename: sceneGraphReducer.h
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// Created by: drose (14Mar02)
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//
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////////////////////////////////////////////////////////////////////
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//
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// PANDA 3D SOFTWARE
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// Copyright (c) 2001, Disney Enterprises, Inc. All rights reserved
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//
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// All use of this software is subject to the terms of the Panda 3d
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// Software license. You should have received a copy of this license
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// along with this source code; you will also find a current copy of
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// the license at http://www.panda3d.org/license.txt .
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//
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// To contact the maintainers of this program write to
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// panda3d@yahoogroups.com .
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//
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////////////////////////////////////////////////////////////////////
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#ifndef SCENEGRAPHREDUCER_H
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#define SCENEGRAPHREDUCER_H
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#include "pandabase.h"
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#include "transformState.h"
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#include "renderAttrib.h"
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#include "renderState.h"
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#include "geomTransformer.h"
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#include "typedObject.h"
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#include "pointerTo.h"
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///////////////////////////////////////////////////////////////////
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// Class : SceneGraphReducer
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// Description : An interface for simplifying ("flattening") scene
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// graphs by eliminating unneeded nodes and collapsing
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// out unneeded state changes and transforms.
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//
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// This class is designed so that it may be inherited
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// from and specialized, if needed, to fine-tune the
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// flattening behavior, but normally the default
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// behavior is sufficient.
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////////////////////////////////////////////////////////////////////
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class EXPCL_PANDA SceneGraphReducer {
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PUBLISHED:
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SceneGraphReducer();
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virtual ~SceneGraphReducer();
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enum AttribTypes {
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TT_transform = 0x001,
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TT_color = 0x002,
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TT_color_scale = 0x004,
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TT_tex_matrix = 0x008,
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TT_other = 0x010,
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};
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void apply_attribs(PandaNode *node, int attrib_types = ~0);
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int flatten(PandaNode *root, bool combine_siblings);
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protected:
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class AccumulatedAttribs {
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public:
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INLINE AccumulatedAttribs();
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INLINE AccumulatedAttribs(const AccumulatedAttribs ©);
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INLINE void operator = (const AccumulatedAttribs ©);
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void write(ostream &out, int attrib_types, int indent_level) const;
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void collect(PandaNode *node, int attrib_types);
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void apply_to_node(PandaNode *node, int attrib_types);
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void apply_to_vertices(PandaNode *node, int attrib_types,
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GeomTransformer &transfomer);
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CPT(TransformState) _transform;
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CPT(RenderAttrib) _color;
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CPT(RenderAttrib) _color_scale;
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CPT(RenderAttrib) _tex_matrix;
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CPT(RenderState) _other;
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};
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void r_apply_attribs(PandaNode *node, int attrib_types,
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AccumulatedAttribs trans);
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int r_flatten(PandaNode *grandparent_node, PandaNode *parent_node,
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bool combine_siblings);
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int flatten_siblings(PandaNode *parent_node);
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virtual bool consider_child(PandaNode *grandparent_node,
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PandaNode *parent_node, PandaNode *child_node);
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virtual bool consider_siblings(PandaNode *parent_node, PandaNode *child1,
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PandaNode *child2);
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virtual bool do_flatten_child(PandaNode *grandparent_node,
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PandaNode *parent_node, PandaNode *child_node);
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virtual PandaNode *do_flatten_siblings(PandaNode *parent_node,
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PandaNode *child1, PandaNode *child2);
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virtual PT(PandaNode) collapse_nodes(PandaNode *node1, PandaNode *node2,
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bool siblings);
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virtual void choose_name(PandaNode *preserve, PandaNode *source1,
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PandaNode *source2);
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private:
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GeomTransformer _transformer;
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};
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#include "sceneGraphReducer.I"
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#endif
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