112 lines
3.9 KiB
Plaintext
112 lines
3.9 KiB
Plaintext
//C++ header - Open Scene Graph - Copyright (C) 1998-2001 Robert Osfield
|
|
//Distributed under the terms of the GNU Library General Public License (LGPL)
|
|
//as published by the Free Software Foundation.
|
|
|
|
#ifndef OSG_BILLBOARD
|
|
#define OSG_BILLBOARD 1
|
|
|
|
#include <osg/Matrix>
|
|
#include <osg/Geode>
|
|
|
|
namespace osg {
|
|
|
|
/** Billboard - a Geode which orientates its child osg::Drawable's to face
|
|
the eye point. Typical uses are for trees, or particle explosions.
|
|
*/
|
|
class SG_EXPORT Billboard : public Geode
|
|
{
|
|
public:
|
|
|
|
enum Mode {
|
|
POINT_ROT_EYE,
|
|
POINT_ROT_WORLD,
|
|
AXIAL_ROT
|
|
};
|
|
|
|
Billboard();
|
|
|
|
/** Copy constructor using CopyOp to manage deep vs shallow copy.*/
|
|
Billboard(const Billboard&,const CopyOp& copyop=CopyOp::SHALLOW_COPY);
|
|
|
|
META_Node(Billboard);
|
|
|
|
/** Set the billboard rotation mode. */
|
|
void setMode(const Mode mode);
|
|
/** Get the billboard rotation mode. */
|
|
inline const Mode getMode() const { return _mode; }
|
|
|
|
/** Set the axis about which all the billboard's drawable rotate. */
|
|
void setAxis(const Vec3& axis);
|
|
/** Get the axis about which all the billboard's drawable rotate. */
|
|
inline const Vec3& getAxis() const { return _axis; }
|
|
|
|
|
|
/** Set the position of specified drawable. */
|
|
inline void setPos(int i,const Vec3& pos) { _positionList[i] = pos; }
|
|
/** Get the position of specified drawable. */
|
|
inline const Vec3& getPos(int i) const { return _positionList[i]; }
|
|
|
|
/** PositionList represents a list of pivot points for each drawable.*/
|
|
typedef std::vector<Vec3> PositionList;
|
|
|
|
/** Get the PositionList from the billboard.*/
|
|
inline PositionList& getPositionList() { return _positionList; }
|
|
|
|
/** Get a const PositionList from the billboard.*/
|
|
inline const PositionList& getPositionList() const { return _positionList; }
|
|
|
|
/** Add Drawable to Billboard with default position(0,0,0);
|
|
* If gset not NULL and is not contained in Billboard then increment its
|
|
* reference count, and dirty the bounding box to cause it to recompute on
|
|
* next getBound() and return true for success. Otherwise return false.
|
|
*/
|
|
virtual const bool addDrawable( Drawable *gset );
|
|
|
|
/** Add Drawable to Geode at position pos.
|
|
* If gset not NULL and is not contained in Billboard then increment its
|
|
* reference count, and dirty the bounding box to cause it to recompute on
|
|
* next getBound() and return true for success. Otherwise return false.
|
|
*/
|
|
virtual const bool addDrawable(Drawable *gset,const Vec3& pos);
|
|
|
|
/** Remove Drawable and associated position from Billboard.
|
|
* If gset is contained in Billboard then remove it from the geoset
|
|
* list and decrement its reference count, and dirty the
|
|
* bounding box to cause it to recompute on next getBound() and
|
|
* return true for success. If gset is not found then return false
|
|
* and do not the reference count of gset is left unchanged.
|
|
*/
|
|
virtual const bool removeDrawable( Drawable *gset );
|
|
|
|
void calcTransform(const Vec3& eye_local, const Vec3& up_local, const Vec3& pos_local,Matrix& mat) const;
|
|
|
|
protected:
|
|
|
|
virtual ~Billboard();
|
|
|
|
virtual const bool computeBound() const;
|
|
|
|
enum AxisAligned
|
|
{
|
|
AXIAL_ROT_X_AXIS=AXIAL_ROT+1,
|
|
AXIAL_ROT_Y_AXIS,
|
|
AXIAL_ROT_Z_AXIS
|
|
};
|
|
|
|
|
|
Mode _mode;
|
|
Vec3 _axis;
|
|
PositionList _positionList;
|
|
|
|
// used internally as cache of which what _axis is aligned to help
|
|
// deicde which method of rotation to use.
|
|
int _cachedMode;
|
|
|
|
void setCachedMode();
|
|
|
|
};
|
|
|
|
};
|
|
|
|
#endif
|