92 lines
3.4 KiB
Plaintext
92 lines
3.4 KiB
Plaintext
#ifndef OSG_BILLBOARD
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#define OSG_BILLBOARD 1
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#include <osg/Matrix>
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#include <osg/Geode>
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namespace osg {
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/** Billboard - a Geode which orientates its child osg::Drawable's to face
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the eye point.
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Typical uses are for trees, or particle explosions.
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*/
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class SG_EXPORT Billboard : public Geode
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{
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public:
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enum Mode {
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AXIAL_ROT,
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POINT_ROT_EYE,
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POINT_ROT_WORLD
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};
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Billboard();
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META_Node(Billboard);
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/** Set the axis about which all the billboard's drawable rotate. */
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inline void setAxis(const Vec3& axis) { _axis = axis; }
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/** Get the axis about which all the billboard's drawable rotate. */
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inline const Vec3& getAxis() const { return _axis; }
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/** Set the billboard rotation mode. */
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inline void setMode(const Mode mode) { _mode = mode; }
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/** Get the billboard rotation mode. */
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inline const Mode getMode() const { return _mode; }
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/** Set the position of specified drawable. */
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inline void setPos(int i,const Vec3& pos) { _positionList[i] = pos; }
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/** Get the position of specified drawable. */
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inline const Vec3& getPos(int i) const { return _positionList[i]; }
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/** PositionList represents a list of pivot points for each drawable.*/
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typedef std::vector<Vec3> PositionList;
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/** Get the PostionList from the billboard.*/
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inline PositionList& getPositionList() { return _positionList; }
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/** Get a const PostionList from the billboard.*/
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inline const PositionList& getPositionList() const { return _positionList; }
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/** Add Drawable to Billboard with default position(0,0,0);
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* If gset not NULL and is not contained in Billboard then increment its
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* reference count, and dirty the bounding box to cause it to recompute on
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* next getBound() and return true for success. Otherwise return false.
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*/
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virtual const bool addDrawable( Drawable *gset );
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/** Add Drawable to Geode at position pos.
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* If gset not NULL and is not contained in Billboard then increment its
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* reference count, and dirty the bounding box to cause it to recompute on
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* next getBound() and return true for success. Otherwise return false.
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*/
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virtual const bool addDrawable(Drawable *gset,const Vec3& pos);
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/** Remove Drawable and associated position from Billboard.
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* If gset is contained in Billboard then remove it from the geoset
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* list and decrement its reference count, and dirty the
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* bounding box to cause it to recompute on next getBound() and
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* return true for success. If gset is not found then return false
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* and do not the reference count of gset is left unchanged.
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*/
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virtual const bool removeDrawable( Drawable *gset );
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void calcRotation(const Vec3& eye_local, const Vec3& pos_local,Matrix& mat) const;
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void calcTransform(const Vec3& eye_local, const Vec3& pos_local,Matrix& mat) const;
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protected:
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virtual ~Billboard();
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virtual const bool computeBound() const;
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Mode _mode;
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Vec3 _axis;
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PositionList _positionList;
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};
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};
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#endif
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