#include <Halftone.h>

Public Member Functions
	Halftone ()
	Halftone (ScatteringParameters *pScatteringParameters, float zOffset, std::vector< float > &rLambdas, float xmin, float xmax, float ymin, float ymax, float screenAngle, float dropletHeight, float dropletWidth, float dropletSpacing)
virtual	~Halftone ()
void	setSurface (SurfaceTNInk *pSurface)
int	drop_process (WavePacket &wp, int updown) const
double	GetZmax () const
Protected Member Functions
void	WriteInfo (int nbr)
Friends
class	SurfaceTNInk

Constructor & Destructor Documentation

Halftone::Halftone ( ) [inline]

Halftone::Halftone	(	ScatteringParameters *	pScatteringParameters,
		float	zOffset,
		std::vector< float > &	rLambdas,
		float	xmin,
		float	xmax,
		float	ymin,
		float	ymax,
		float	screenAngle,
		float	dropletHeight,
		float	dropletWidth,
		float	dropletSpacing
	)

New constructor.

Parameters:

pScatteringParameters	pointer to the scattering parameters this halftone has.
zOffset	offset of the surface this ink layer belongs too.
rLambdas	the simulation wavelengths.
xmin	minimum x position of the ink layer.
xmax	maximum x position of the ink layer.
ymin	minimum y position of the ink layer.
ymax	maximum y position of the ink layer.
screenAngle	angle between edge of surface and edge of the ink layer.
dropletHeight	height of the droplets in micrometer.
dropletWidth	width of the ink droplets in micrometer.
dropletSpacing	distance between droplets in micrometer.

Compute the z-value of the droplet centres.

Update the halftone boundary slightly and check that it is within the surface boundary.

Halftone::~Halftone ( ) [virtual]

Member Function Documentation

int Halftone::drop_process	(	WavePacket &	wp,
		int	updown
	)		const

This method sets the surface this ink layer belongs to.

Parameters:

wp	Process the wave packet
updown

If we are not within the boundaries -- abort.

Calculate the surface intersection point with respect to the screen angle coordinate system

Calculate the vector components from the closest ink drop centre to the surface intersection point.

Abort if we miss the drop

Find the sphere centre with respect to the global coordinate system

If hitting the surface from above

Find the sphere intersection: first get the coefficients of the quadratic equation. Choose the smaller of the solutions. Move the wp to this point and let it scatter.

If we hit outside the halftone boundary -- abort

If reflected

Multiple scattering: if reflected towards the surface continue (The two latter arguments should have no effect.)

If reflected away

If transmitted, continue below.

If coming from beneath, the correct Sposition and Snormal should already be set. Let it scatter.

If reflected back

If tranmitted into the drop, continue below.

Move the wp slightly more into the drop, to avoid the same intersection point from being found again.

Get the scatter, absorption and extinction coordinates respectively.

Get the randomized free path before being scattered or absorbed, and the distance to the drop boundary. hull_ind indicates the current wp positioning.

If scattered within the drop or absorbed.

Absorbed

Scattered. NOTE: Uniform distribution of new wp direction -- use of Henyey-Greenstein phase function or similar not implemented!

If the wp hits the drop boundary.

If hull intersection

If transmitted

Multiple scattering: if transmitted towards the surface continue (The two latter arguments should have no effect.)

If transmitted away

If halftone boundary hit

If contact area intersection

If transmitted to the layer(s) below

Too many loops -- abort.

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double Halftone::GetZmax ( ) const [inline]

void Halftone::setSurface ( SurfaceTNInk * pSurface )

This method sets the surface this ink layer belongs to.

Parameters:

pSurface pointer to the surface this ink layer belongs to.

void Halftone::WriteInfo ( int nbr ) [protected]

Friends And Related Function Documentation

friend class SurfaceTNInk [friend]

The documentation for this class was generated from the following files:

OpenPaperOpt/Halftone.h
OpenPaperOpt/Halftone.cpp

Public Member Functions

Protected Member Functions

Friends

Constructor & Destructor Documentation

Member Function Documentation

Friends And Related Function Documentation