95 lines
2.6 KiB
C++
95 lines
2.6 KiB
C++
// Filename: renderTraverser.h
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// Created by: drose (12Apr00)
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//
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////////////////////////////////////////////////////////////////////
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#ifndef RENDERTRAVERSER_H
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#define RENDERTRAVERSER_H
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#include <pandabase.h>
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#include <arcChain.h>
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#include <typeHandle.h>
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#include <typedReferenceCount.h>
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#include <notify.h>
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class GraphicsStateGuardian;
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class Node;
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class NodeRelation;
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class AllAttributesWrapper;
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class AllTransitionsWrapper;
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////////////////////////////////////////////////////////////////////
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// Class : RenderTraverser
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// Description : This is the abstract base class that defines the
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// interface for any number of different kinds of
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// specialized traversers that walk over the scene graph
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// and render it with a given GraphicsStateGuardian,
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// such as DirectRenderTraverser and CullTraverser.
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////////////////////////////////////////////////////////////////////
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class EXPCL_PANDA RenderTraverser : public TypedReferenceCount {
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public:
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INLINE RenderTraverser(GraphicsStateGuardian *gsg,
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TypeHandle graph_type,
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const ArcChain &arc_chain);
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INLINE ~RenderTraverser();
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typedef ArcChain::iterator iterator;
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typedef ArcChain::const_iterator const_iterator;
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INLINE const ArcChain &get_arc_chain() const;
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INLINE const_iterator begin() const;
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INLINE const_iterator end() const;
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INLINE bool empty() const;
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PUBLISHED:
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INLINE GraphicsStateGuardian *get_gsg() const;
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INLINE TypeHandle get_graph_type() const;
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public:
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virtual void traverse(Node *root,
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const AllAttributesWrapper &initial_state,
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const AllTransitionsWrapper &net_trans)=0;
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PUBLISHED:
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virtual void output(ostream &out) const;
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virtual void write(ostream &out, int indent_level = 0) const;
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protected:
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// These methods are to be called by derived classes as we traverse
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// each arc. They update the arc list returned by begin()/end().
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INLINE void mark_forward_arc(NodeRelation *arc);
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INLINE void mark_backward_arc(NodeRelation *arc);
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protected:
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GraphicsStateGuardian *_gsg;
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TypeHandle _graph_type;
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ArcChain _arc_chain;
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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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TypedReferenceCount::init_type();
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register_type(_type_handle, "RenderTraverser",
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TypedReferenceCount::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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INLINE ostream &operator << (ostream &out, const RenderTraverser &rt) {
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rt.output(out);
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return out;
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}
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#include "renderTraverser.I"
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#endif
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