6a67be2e32
forcing users to use osgDB::readRef*File() methods. The later is preferable as it closes a potential threading bug when using paging databases in conjunction
with the osgDB::Registry Object Cache. This threading bug occurs when one thread gets an object from the Cache via an osgDB::read*File() call where only
a pointer to the object is passed back, so taking a reference to the object is delayed till it gets reassigned to a ref_ptr<>, but at the same time another
thread calls a flush of the Object Cache deleting this object as it's referenceCount is now zero. Using osgDB::readREf*File() makes sure the a ref_ptr<> is
passed back and the referenceCount never goes to zero.
To ensure the OSG builds when OSG_PROVIDE_READFILE is to OFF the many cases of osgDB::read*File() usage had to be replaced with a ref_ptr<> osgDB::readRef*File()
usage. The avoid this change causing lots of other client code to be rewritten to handle the use of ref_ptr<> in place of C pointer I introduced a serious of
templte methods in various class to adapt ref_ptr<> to the underly C pointer to be passed to old OSG API's, example of this is found in include/osg/Group:
bool addChild(Node* child); // old method which can only be used with a Node*
tempalte<class T> bool addChild(const osg::ref_ptr<T>& child) { return addChild(child.get()); } // adapter template method
These changes together cover 149 modified files, so it's a large submission. This extent of changes are warrent to make use of the Object Cache
and multi-threaded loaded more robust.
git-svn-id: http://svn.openscenegraph.org/osg/OpenSceneGraph/branches/OpenSceneGraph-3.4@15165 16af8721-9629-0410-8352-f15c8da7e697
653 lines
19 KiB
C++
653 lines
19 KiB
C++
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
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*
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* This library is open source and may be redistributed and/or modified under
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* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
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* (at your option) any later version. The full license is in LICENSE file
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* included with this distribution, and on the openscenegraph.org website.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* OpenSceneGraph Public License for more details.
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*/
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//osgParticle - Copyright (C) 2002 Marco Jez
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#ifndef OSGPARTICLE_PARTICLE
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#define OSGPARTICLE_PARTICLE 1
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#include <osgParticle/Export>
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#include <osgParticle/Interpolator>
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#include <osgParticle/range>
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#include <osg/ref_ptr>
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#include <osg/Vec3>
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#include <osg/Vec4>
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#include <osg/Matrix>
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#include <osg/Drawable>
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#include <osg/GL>
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#include <osg/GLBeginEndAdapter>
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namespace osgParticle
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{
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// forward declare so we can reference it
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class ParticleSystem;
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/** Implementation of a <B>particle</B>.
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Objects of this class are particles, they have some graphical properties
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and some physical properties. Particles are created by emitters and then placed
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into Particle Systems, where they live and get updated at each frame.
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Particles can either live forever (lifeTime < 0), or die after a specified
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time (lifeTime >= 0). For each property which is defined as a range of values, a
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"current" value will be evaluated at each frame by interpolating the <I>min</I>
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and <I>max</I> values so that <I>curr_value = min</I> when <I>t == 0</I>, and
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<I>curr_value = max</I> when <I>t == lifeTime</I>.
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You may customize the interpolator objects to achieve any kind of transition.
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If you want the particle to live forever, set its lifetime to any value <= 0;
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in that case, no interpolation is done to compute real-time properties, and only
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minimum values are used.
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*/
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class OSGPARTICLE_EXPORT Particle {
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friend class ParticleSystem;
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public:
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enum
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{
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INVALID_INDEX = -1
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};
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/**
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Shape of particles.
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NOTE: the LINE shape should be used in conjunction with FIXED alignment mode (see ParticleSystem).
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*/
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enum Shape {
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POINT, // uses GL_POINTS as primitive
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QUAD, // uses GL_QUADS as primitive
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QUAD_TRIANGLESTRIP, // uses GL_TRI_angleSTRIP as primitive, but each particle needs a glBegin/glEnd pair
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HEXAGON, // may save some filling time, but uses more triangles
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LINE, // uses GL_LINES to draw line segments that point to the direction of motion
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USER // uses a user-defined drawable as primitive
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};
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Particle();
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/// Get the shape of the particle.
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inline Shape getShape() const;
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/// Set the shape of the particle.
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inline void setShape(Shape s);
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/// Get whether the particle is still alive.
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inline bool isAlive() const;
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/// Get the life time of the particle (in seconds).
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inline double getLifeTime() const;
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/// Get the age of the particle (in seconds).
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inline double getAge() const;
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/// Get the minimum and maximum values for polygon size.
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inline const rangef& getSizeRange() const;
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/// Get the minimum and maximum values for alpha.
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inline const rangef& getAlphaRange() const;
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/// Get the minimum and maximum values for color.
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inline const rangev4& getColorRange() const;
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/// Get the interpolator for computing the size of polygons.
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inline const Interpolator* getSizeInterpolator() const;
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/// Get the interpolator for computing alpha values.
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inline const Interpolator* getAlphaInterpolator() const;
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/// Get the interpolator for computing color values.
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inline const Interpolator* getColorInterpolator() const;
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/** Get the physical radius of the particle.
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For built-in operators to work correctly, lengths must be expressed in meters.
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*/
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inline float getRadius() const;
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/** Get the mass of the particle.
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For built-in operators to work correctly, remember that the mass is expressed in kg.
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*/
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inline float getMass() const;
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/// Get <CODE>1 / getMass()</CODE>.
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inline float getMassInv() const;
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/// Get the position vector.
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inline const osg::Vec3& getPosition() const;
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/** Get the velocity vector.
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For built-in operators to work correctly, remember that velocity components are expressed
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in meters per second.
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*/
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inline const osg::Vec3& getVelocity() const;
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/// Get the previous position (the position before last update).
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inline const osg::Vec3& getPreviousPosition() const;
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/// Get the angle vector.
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inline const osg::Vec3& getAngle() const;
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/// Get the rotational velocity vector.
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inline const osg::Vec3& getAngularVelocity() const;
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/// Get the previous angle vector.
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inline const osg::Vec3& getPreviousAngle() const;
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/// Get the current color
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inline const osg::Vec4& getCurrentColor() const { return _current_color; }
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/// Get the current alpha
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inline float getCurrentAlpha() const { return _current_alpha; }
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/// Get the s texture coordinate of the bottom left of the particle
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inline float getSTexCoord() const { return _s_coord; }
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/// Get the t texture coordinate of the bottom left of the particle
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inline float getTTexCoord() const { return _t_coord; }
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/// Get width of texture tile
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inline int getTileS() const;
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/// Get height of texture tile
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inline int getTileT() const;
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/// Get number of texture tiles
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inline int getNumTiles() const { return _end_tile - _start_tile + 1; }
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/** Kill the particle on next update
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NOTE: after calling this function, the <CODE>isAlive()</CODE> method will still
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return true until the particle is updated again.
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*/
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inline void kill();
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/// Set the life time of the particle.
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inline void setLifeTime(double t);
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/// Set the minimum and maximum values for polygon size.
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inline void setSizeRange(const rangef& r);
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/// Set the minimum and maximum values for alpha.
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inline void setAlphaRange(const rangef& r);
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/// Set the minimum and maximum values for color.
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inline void setColorRange(const rangev4& r);
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/// Set the interpolator for computing size values.
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inline void setSizeInterpolator(Interpolator* ri);
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template<class T> void setSizeInterpolator(const osg::ref_ptr<T>& ri) { setSizeInterpolator(ri.get()); }
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/// Set the interpolator for computing alpha values.
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inline void setAlphaInterpolator(Interpolator* ai);
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template<class T> void setAlphaInterpolator(const osg::ref_ptr<T>& ri) { setAlphaInterpolator(ri.get()); }
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/// Set the interpolator for computing color values.
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inline void setColorInterpolator(Interpolator* ci);
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template<class T> void setColorInterpolator(const osg::ref_ptr<T>& ri) { setColorInterpolator(ri.get()); }
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/** Set the physical radius of the particle.
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For built-in operators to work correctly, lengths must be expressed in meters.
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*/
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inline void setRadius(float r);
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/** Set the mass of the particle.
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For built-in operators to work correctly, remember that the mass is expressed in kg.
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*/
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inline void setMass(float m);
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/// Set the position vector.
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inline void setPosition(const osg::Vec3& p);
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/** Set the velocity vector.
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For built-in operators to work correctly, remember that velocity components are expressed
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in meters per second.
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*/
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inline void setVelocity(const osg::Vec3& v);
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/// Add a vector to the velocity vector.
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inline void addVelocity(const osg::Vec3& dv);
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/// Transform position and velocity vectors by a matrix.
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inline void transformPositionVelocity(const osg::Matrix& xform);
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/// Transform position and velocity vectors by a combination of two matrices
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void transformPositionVelocity(const osg::Matrix& xform1, const osg::Matrix& xform2, float r);
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/// Set the angle vector.
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inline void setAngle(const osg::Vec3& a);
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/**
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Set the angular velocity vector.
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Components x, y and z are angles of rotation around the respective axis (in radians).
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*/
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inline void setAngularVelocity(const osg::Vec3& v);
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/// Add a vector to the angular velocity vector.
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inline void addAngularVelocity(const osg::Vec3& dv);
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/// Transform angle and angularVelocity vectors by a matrix.
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inline void transformAngleVelocity(const osg::Matrix& xform);
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/** Update the particle (don't call this method manually).
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This method is called automatically by <CODE>ParticleSystem::update()</CODE>; it
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updates the graphical properties of the particle for the current time,
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checks whether the particle is still alive, and then updates its position
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by computing <I>P = P + V * dt</I> (where <I>P</I> is the position and <I>V</I> is the velocity).
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*/
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bool update(double dt, bool onlyTimeStamp);
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/// Perform some pre-rendering tasks. Called automatically by particle systems.
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inline void beginRender(osg::GLBeginEndAdapter* gl) const;
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/// Render the particle. Called automatically by particle systems.
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void render(osg::GLBeginEndAdapter* gl, const osg::Vec3& xpos, const osg::Vec3& px, const osg::Vec3& py, float scale = 1.0f) const;
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/// Render the particle with user-defined drawable
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void render(osg::RenderInfo& renderInfo, const osg::Vec3& xpos, const osg::Vec3& xrot) const;
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/// Perform some post-rendering tasks. Called automatically by particle systems.
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inline void endRender(osg::GLBeginEndAdapter* gl) const;
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/// Get the current (interpolated) polygon size. Valid only after the first call to update().
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inline float getCurrentSize() const;
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/// Specify how the particle texture is tiled.
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/// All tiles in the given range are sequentially displayed during the lifetime
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/// of the particle. When no range is given, all tiles are displayed during the lifetime.
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inline void setTextureTileRange(int sTile, int tTile, int startTile, int endTile);
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/// Same as above, range starts at 0 and ends at end
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inline void setTextureTile(int sTile, int tTile, int end = -1);
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inline int getStartTile() const;
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inline int getEndTile() const;
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/// Set the previous particle
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inline void setPreviousParticle(int previous) { _previousParticle = previous; }
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/// Get the previous particle
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inline int getPreviousParticle() const { return _previousParticle; }
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/// Set the next particle
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inline void setNextParticle(int next) { _nextParticle = next; }
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/// Get the const next particle
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inline int getNextParticle() const { return _nextParticle; }
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/// Set the depth of the particle
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inline void setDepth(double d) { _depth = d; }
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/// Get the depth of the particle
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inline double getDepth() const { return _depth; }
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/// Set the user-defined particle drawable
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inline void setDrawable(osg::Drawable* d) { _drawable = d; }
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/// Get the user-defined particle drawable
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inline osg::Drawable* getDrawable() const { return _drawable.get(); }
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/// Sorting operator
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bool operator<(const Particle &P) const { return _depth < P._depth; }
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/// Method for initializing a particles texture coords as part of a connected particle system.
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void setUpTexCoordsAsPartOfConnectedParticleSystem(ParticleSystem* ps);
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protected:
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Shape _shape;
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rangef _sr;
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rangef _ar;
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rangev4 _cr;
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osg::ref_ptr<Interpolator> _si;
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osg::ref_ptr<Interpolator> _ai;
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osg::ref_ptr<Interpolator> _ci;
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bool _mustdie;
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double _lifeTime;
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float _radius;
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float _mass;
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float _massinv;
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osg::Vec3 _prev_pos;
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osg::Vec3 _position;
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osg::Vec3 _velocity;
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osg::Vec3 _prev_angle;
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osg::Vec3 _angle;
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osg::Vec3 _angul_arvel;
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double _t0;
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float _alive;
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float _current_size;
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float _current_alpha;
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osg::Vec3 _base_prop; // [0] _alive [1] _current_size [2] _current_alpha
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osg::Vec4 _current_color;
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float _s_tile;
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float _t_tile;
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int _start_tile;
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int _end_tile;
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int _cur_tile;
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float _s_coord;
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float _t_coord;
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// previous and next Particles are only used in ConnectedParticleSystems
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int _previousParticle;
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int _nextParticle;
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// the depth of the particle is used only when sorting is enabled
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double _depth;
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// the particle drawable is used only when USER shape is enabled
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osg::ref_ptr<osg::Drawable> _drawable;
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};
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// INLINE FUNCTIONS
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inline Particle::Shape Particle::getShape() const
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{
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return _shape;
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}
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inline void Particle::setShape(Shape s)
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{
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_shape = s;
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}
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inline bool Particle::isAlive() const
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{
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return _alive>0.0f;
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}
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inline double Particle::getLifeTime() const
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{
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return _lifeTime;
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}
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inline double Particle::getAge() const
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{
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return _t0;
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}
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inline float Particle::getRadius() const
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{
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return _radius;
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}
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inline void Particle::setRadius(float r)
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{
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_radius = r;
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}
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inline const rangef& Particle::getSizeRange() const
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{
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return _sr;
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}
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inline const rangef& Particle::getAlphaRange() const
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{
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return _ar;
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}
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inline const rangev4& Particle::getColorRange() const
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{
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return _cr;
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}
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inline const Interpolator* Particle::getSizeInterpolator() const
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{
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return _si.get();
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}
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inline const Interpolator* Particle::getAlphaInterpolator() const
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{
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return _ai.get();
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}
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inline const Interpolator* Particle::getColorInterpolator() const
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{
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return _ci.get();
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}
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inline const osg::Vec3& Particle::getPosition() const
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{
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return _position;
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}
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inline const osg::Vec3& Particle::getVelocity() const
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{
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return _velocity;
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}
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inline const osg::Vec3& Particle::getPreviousPosition() const
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{
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return _prev_pos;
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}
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inline const osg::Vec3& Particle::getAngle() const
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{
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return _angle;
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}
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inline const osg::Vec3& Particle::getAngularVelocity() const
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{
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return _angul_arvel;
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}
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inline const osg::Vec3& Particle::getPreviousAngle() const
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{
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return _prev_angle;
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}
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inline int Particle::getTileS() const
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{
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return (_s_tile>0.0f) ? static_cast<int>(1.0f / _s_tile) : 1;
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}
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inline int Particle::getTileT() const
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{
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return (_t_tile>0.0f) ? static_cast<int>(1.0f / _t_tile) : 1;
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}
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inline void Particle::kill()
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{
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_mustdie = true;
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}
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inline void Particle::setLifeTime(double t)
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{
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_lifeTime = t;
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}
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inline void Particle::setSizeRange(const rangef& r)
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{
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_sr = r;
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}
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inline void Particle::setAlphaRange(const rangef& r)
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{
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_ar = r;
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}
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inline void Particle::setColorRange(const rangev4& r)
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{
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_cr = r;
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}
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inline void Particle::setSizeInterpolator(Interpolator* ri)
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{
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_si = ri;
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}
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inline void Particle::setAlphaInterpolator(Interpolator* ai)
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{
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_ai = ai;
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}
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inline void Particle::setColorInterpolator(Interpolator* ci)
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{
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_ci = ci;
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}
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inline void Particle::setPosition(const osg::Vec3& p)
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{
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_position = p;
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}
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inline void Particle::setVelocity(const osg::Vec3& v)
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{
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_velocity = v;
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}
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inline void Particle::addVelocity(const osg::Vec3& dv)
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{
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_velocity += dv;
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}
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inline void Particle::transformPositionVelocity(const osg::Matrix& xform)
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{
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_position = xform.preMult(_position);
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_velocity = osg::Matrix::transform3x3(_velocity, xform);
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}
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inline void Particle::transformPositionVelocity(const osg::Matrix& xform1, const osg::Matrix& xform2, float r)
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{
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osg::Vec3 position1 = xform1.preMult(_position);
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osg::Vec3 velocity1 = osg::Matrix::transform3x3(_velocity, xform1);
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osg::Vec3 position2 = xform2.preMult(_position);
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osg::Vec3 velocity2 = osg::Matrix::transform3x3(_velocity, xform2);
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float one_minus_r = 1.0f-r;
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_position = position1*r + position2*one_minus_r;
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_velocity = velocity1*r + velocity2*one_minus_r;
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}
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inline void Particle::setAngle(const osg::Vec3& a)
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{
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_angle = a;
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}
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inline void Particle::setAngularVelocity(const osg::Vec3& v)
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{
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_angul_arvel = v;
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}
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inline void Particle::addAngularVelocity(const osg::Vec3& dv)
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{
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_angul_arvel += dv;
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}
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inline void Particle::transformAngleVelocity(const osg::Matrix& xform)
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{
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// this should be optimized!
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osg::Vec3 a1 = _angle + _angul_arvel;
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_angle = xform.preMult(_angle);
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a1 = xform.preMult(a1);
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_angul_arvel = a1 - _angle;
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}
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inline float Particle::getMass() const
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{
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return _mass;
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}
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inline float Particle::getMassInv() const
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{
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return _massinv;
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}
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inline void Particle::setMass(float m)
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{
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_mass = m;
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_massinv = 1 / m;
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}
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inline void Particle::beginRender(osg::GLBeginEndAdapter* gl) const
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{
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switch (_shape)
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{
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case POINT:
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gl->Begin(GL_POINTS);
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break;
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case QUAD:
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gl->Begin(GL_QUADS);
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break;
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case LINE:
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gl->Begin(GL_LINES);
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break;
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default: ;
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}
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}
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inline void Particle::endRender(osg::GLBeginEndAdapter* gl) const
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{
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switch (_shape)
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{
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case POINT:
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case QUAD:
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case LINE:
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gl->End();
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break;
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default: ;
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}
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}
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inline float Particle::getCurrentSize() const
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{
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return _current_size;
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}
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inline void Particle::setTextureTile(int sTile, int tTile, int end)
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{
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setTextureTileRange(sTile, tTile, -1, end);
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}
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inline void Particle::setTextureTileRange(int sTile, int tTile, int startTile, int endTile)
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{
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_s_tile = (sTile>0) ? 1.0f / static_cast<float>(sTile) : 1.0f;
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_t_tile = (tTile>0) ? 1.0f / static_cast<float>(tTile) : 1.0f;
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if(startTile == -1)
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{
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_start_tile = 0;
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}
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else
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{
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_start_tile = startTile;
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}
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if(endTile == -1)
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{
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_end_tile = sTile * tTile;
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}
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else
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{
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_end_tile = endTile;
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}
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}
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inline int Particle::getStartTile() const
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|
{
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return _start_tile;
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}
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inline int Particle::getEndTile() const
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|
{
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|
return _end_tile;
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}
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}
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#endif
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