102 lines
3.2 KiB
C++
102 lines
3.2 KiB
C++
// Filename: onOffTransition.h
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// Created by: drose (20Mar00)
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//
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////////////////////////////////////////////////////////////////////
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#ifndef ONOFFTRANSITION_H
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#define ONOFFTRANSITION_H
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#include <pandabase.h>
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#include "nodeTransition.h"
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#include "transitionDirection.h"
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class NodeAttribute;
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class NodeRelation;
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////////////////////////////////////////////////////////////////////
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// Class : OnOffTransition
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// Description : This is an abstract class that encapsulates a family
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// of transitions for states that are either on or off
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// (and, when on, may or may not have some particular
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// value). This is typically useful for things like
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// Texture, which have a definite value when on, and
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// also have a definite off condition.
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//
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// See also OnTransition, which is used for states that
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// are always on in some sense, or whose value itself
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// can encode the case of being off.
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//
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// The transition may be either 'on', turning on a
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// particular state, 'off', turning *off* a state that
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// was previously turned on, or 'identity', not
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// affecting the state. If two 'on' transitions are
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// composed together, the second one overrides the
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// first.
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////////////////////////////////////////////////////////////////////
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class EXPCL_PANDA OnOffTransition : public NodeTransition {
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protected:
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INLINE OnOffTransition(TransitionDirection direction = TD_identity);
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INLINE OnOffTransition(const OnOffTransition ©);
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INLINE void operator = (const OnOffTransition ©);
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PUBLISHED:
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INLINE void set_identity();
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INLINE void set_on();
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INLINE void set_off();
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INLINE bool is_identity() const;
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INLINE bool is_on() const;
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INLINE bool is_off() const;
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public:
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virtual NodeTransition *compose(const NodeTransition *other) const;
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virtual NodeTransition *invert() const;
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virtual NodeAttribute *apply(const NodeAttribute *attrib) const;
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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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virtual int internal_compare_to(const NodeTransition *other) const;
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virtual void set_value_from(const OnOffTransition *other);
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virtual int compare_values(const OnOffTransition *other) const;
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virtual void output_value(ostream &out) const;
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virtual void write_value(ostream &out, int indent_level) const;
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private:
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TransitionDirection _direction;
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public:
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//No Read/Write factory methods are defined since this is
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//only an abstract clas
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virtual void write_datagram(BamWriter* manager, Datagram &me);
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protected:
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void fillin(DatagramIterator& scan, BamReader* manager);
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public:
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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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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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NodeTransition::init_type();
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register_type(_type_handle, "OnOffTransition",
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NodeTransition::get_class_type());
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}
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private:
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static TypeHandle _type_handle;
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friend class OnOffAttribute;
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};
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#include "onOffTransition.I"
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#endif
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