106 lines
3 KiB
C++
106 lines
3 KiB
C++
/**
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* PANDA 3D SOFTWARE
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* Copyright (c) Carnegie Mellon University. All rights reserved.
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*
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* All use of this software is subject to the terms of the revised BSD
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* license. You should have received a copy of this license along
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* with this source code in a file named "LICENSE."
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*
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* @file rigidBodyCombiner.h
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* @author drose
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* @date 2007-02-22
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*/
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#ifndef RIGIDBODYCOMBINER_H
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#define RIGIDBODYCOMBINER_H
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#include "pandabase.h"
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#include "pandaNode.h"
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#include "nodeVertexTransform.h"
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#include "pvector.h"
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class NodePath;
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/**
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* This is a special node that combines multiple independently-moving rigid
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* nodes into one Geom internally (or as few Geoms as possible), for the
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* purposes of improving rendering performance.
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*
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* To use it, parent a number of moving objects to this node and call
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* collect(). A child node is identified as "moving" if (a) it has a non-
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* identity transform initially, or (b) it is a ModelNode with the
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* preserve_transform flag set. Any other nodes will be considered static,
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* and later transforms applied to them will not be identified.
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*
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* You should call collect() only at startup or if you change the set of
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* children; it is a relatively expensive call.
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*
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* Once you call collect(), you may change the transforms on the child nodes
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* freely without having to call collect() again.
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*
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* RenderEffects such as Billboards are not supported below this node.
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*/
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class EXPCL_PANDA_GRUTIL RigidBodyCombiner : public PandaNode {
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PUBLISHED:
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explicit RigidBodyCombiner(const std::string &name);
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protected:
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RigidBodyCombiner(const RigidBodyCombiner ©);
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virtual PandaNode *make_copy() const;
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PUBLISHED:
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void collect();
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NodePath get_internal_scene();
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MAKE_PROPERTY(internal_scene, get_internal_scene);
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public:
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// From parent class PandaNode
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virtual bool cull_callback(CullTraverser *trav, CullTraverserData &data);
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private:
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void r_collect(PandaNode *node, const RenderState *state,
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const VertexTransform *transform);
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PT(GeomVertexData) convert_vd(const VertexTransform *transform,
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const GeomVertexData *orig);
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PT(PandaNode) _internal_root;
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typedef pvector< PT(NodeVertexTransform) > Transforms;
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Transforms _internal_transforms;
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class VDUnifier {
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public:
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INLINE VDUnifier(const VertexTransform *transform,
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const GeomVertexData *orig);
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INLINE bool operator < (const VDUnifier &other) const;
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const VertexTransform *_transform;
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const GeomVertexData *_orig;
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};
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typedef pmap<VDUnifier, PT(GeomVertexData) > VDTable;
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VDTable _vd_table;
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public:
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static TypeHandle get_class_type() {
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return _type_handle;
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}
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static void init_type() {
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PandaNode::init_type();
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register_type(_type_handle, "RigidBodyCombiner",
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PandaNode::get_class_type());
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}
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virtual TypeHandle get_type() const {
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return get_class_type();
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}
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virtual TypeHandle force_init_type() {init_type(); return get_class_type();}
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private:
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static TypeHandle _type_handle;
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};
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#include "rigidBodyCombiner.I"
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#endif
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