82 lines
2.4 KiB
C++
82 lines
2.4 KiB
C++
// Filename: onTransition.h
|
|
// Created by: drose (22Mar00)
|
|
//
|
|
////////////////////////////////////////////////////////////////////
|
|
|
|
#ifndef ONTRANSITION_H
|
|
#define ONTRANSITION_H
|
|
|
|
#include <pandabase.h>
|
|
|
|
#include "nodeTransition.h"
|
|
|
|
class NodeAttribute;
|
|
class NodeRelation;
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Class : OnTransition
|
|
// Description : This is an abstract class that encapsulates a family
|
|
// of transitions for states that are always on, in one
|
|
// state or another. It's similar to OnOffTransition,
|
|
// except the state can never be 'off'; it is always on
|
|
// in some sense.
|
|
//
|
|
// Most scene graph attributes that have an enumerated
|
|
// set of states fall into this category.
|
|
//
|
|
// There is no explicit identity transition. Each
|
|
// transition always changes the state.
|
|
////////////////////////////////////////////////////////////////////
|
|
class EXPCL_PANDA OnTransition : public NodeTransition {
|
|
protected:
|
|
INLINE OnTransition();
|
|
INLINE OnTransition(const OnTransition ©);
|
|
INLINE void operator = (const OnTransition ©);
|
|
|
|
public:
|
|
virtual NodeTransition *compose(const NodeTransition *other) const;
|
|
virtual NodeTransition *invert() const;
|
|
virtual NodeAttribute *apply(const NodeAttribute *attrib) const;
|
|
|
|
virtual void output(ostream &out) const;
|
|
virtual void write(ostream &out, int indent_level = 0) const;
|
|
|
|
protected:
|
|
virtual int internal_compare_to(const NodeTransition *other) const;
|
|
|
|
virtual void set_value_from(const OnTransition *other)=0;
|
|
virtual int compare_values(const OnTransition *other) const=0;
|
|
virtual void output_value(ostream &out) const=0;
|
|
virtual void write_value(ostream &out, int indent_level) const=0;
|
|
|
|
//No new data is defined in OnTransition, and OnTransition is only
|
|
//an Abstract class, so no Read/Write methods are defined
|
|
|
|
public:
|
|
virtual TypeHandle get_type() const {
|
|
return get_class_type();
|
|
}
|
|
virtual TypeHandle force_init_type() {init_type(); return get_class_type();}
|
|
|
|
PUBLISHED:
|
|
static TypeHandle get_class_type() {
|
|
return _type_handle;
|
|
}
|
|
|
|
public:
|
|
static void init_type() {
|
|
NodeTransition::init_type();
|
|
register_type(_type_handle, "OnTransition",
|
|
NodeTransition::get_class_type());
|
|
}
|
|
|
|
private:
|
|
static TypeHandle _type_handle;
|
|
|
|
friend class OnAttribute;
|
|
};
|
|
|
|
#include "onTransition.I"
|
|
|
|
#endif
|