This is an OSG Drawable object that directly renders point-sprites. More...

Public Member Functions
	META_Object (Palomino, MediumParticleDrawable) MediumParticleDrawable(const RGBA color
const fp const fp const fp	mColor (color)
const fp const fp const fp	mRange (range)
const fp const fp const fp	mRangeInv (1.0f/range)
const fp const fp const fp	mMinWidth (minWidth)
const fp const fp const fp	mMaxWidth (maxWidth)
const fp const fp const fp	mVertexArray ()
const fp const fp const fp	mBoundingBox ()
	MediumParticleDrawable (void)
	MediumParticleDrawable (const MediumParticleDrawable &other, const osg::CopyOp &copyop=osg::CopyOp::SHALLOW_COPY)
virtual	~MediumParticleDrawable ()
virtual void	drawImplementation (osg::RenderInfo &renderInfo) const
osg::BoundingBox	computeBound () const
void	AttachParticle (const osg::Vec3 &v)
uint	GetVertexCount (void) const
void	SetColorAll (const RGBA color)
Public Attributes
const fp	range
const fp const fp	minWidth
const fp const fp const fp	maxWidth: osg::Drawable()
Private Member Functions
void	Init (void)
	DECLARE_TYPESIG (TYPESIG_MEDIUM_PARTICLE_DRAWABLE)
Private Attributes
RGBA	mColor
	color of all point sprites
const fp	mRange
	width of point-sprite is minimized at limit of range
const fp	mRangeInv
const fp	mMinWidth
	minimum size of point-sprites
const fp	mMaxWidth
	maximum size of point-sprites
std::vector< osg::Vec3 >	mVertexArray
	not osg::Vec3Array which lacks swap()
osg::BoundingBox	mBoundingBox
	no need for ref_ptr (isn't derived from osg::Referenced)

Detailed Description

This is an OSG Drawable object that directly renders point-sprites.

The reason for directly-rendering is to that the size of every point-sprite needs to be computed individually. Issuing glPointSize() for every particle is faster and less-cumbersome than composing nodes with various point sizes.

When OSG has called drawImplementation(), OSG has set OpenGL state for rendering OpenGL "point sprites".

Constructor & Destructor Documentation

fx::MediumParticleDrawable::MediumParticleDrawable ( void ) [inline]

fx::MediumParticleDrawable::MediumParticleDrawable	(	const MediumParticleDrawable &	other,
		const osg::CopyOp &	copyop = `osg::CopyOp::SHALLOW_COPY`
	)			`[inline]`

virtual fx::MediumParticleDrawable::~MediumParticleDrawable ( ) [inline, virtual]

Member Function Documentation

void fx::MediumParticleDrawable::AttachParticle ( const osg::Vec3 & v ) [inline]

Add particle.

osg::BoundingBox fx::MediumParticleDrawable::computeBound ( ) const [inline]

Compute bound of medium particles. Which is the fastest? Bounding all point-sprites in one box or dividing them into multiple boxes (?).

fx::MediumParticleDrawable::DECLARE_TYPESIG ( TYPESIG_MEDIUM_PARTICLE_DRAWABLE ) [private]

virtual void fx::MediumParticleDrawable::drawImplementation ( osg::RenderInfo & renderInfo ) const [inline, virtual]

Draw array of medium particles.

uint fx::MediumParticleDrawable::GetVertexCount ( void ) const [inline]

Returns:: Vertex count (amount of particles).

void fx::MediumParticleDrawable::Init ( void ) [inline, private]

ctor subroutine.

const fp const fp const fp fx::MediumParticleDrawable::mBoundingBox ( ) [inline]

const fp const fp const fp fx::MediumParticleDrawable::mColor ( color )

fx::MediumParticleDrawable::META_Object	(	Palomino	,
		MediumParticleDrawable
	)			const

ctor/dtor.

Parameters:

	color	Applied to all particles.
	range	Distance in world space where particle is scaled-down to mediumest size.
	minWidth,maxWidth	Limits of point size scaled by distance of their vertex from viewpoint. This simulates 3D:2D projection.