Initial.h File Reference

Generating initial conditions of SPH particles. More...

#include "common/ForwardDecl.h"
#include "objects/containers/ArrayView.h"
#include "objects/geometry/Vector.h"
#include "objects/wrappers/Function.h"
#include "quantities/IMaterial.h"

Go to the source code of this file.

Classes
class	BodyView
	Non-owning view of particles belonging to the same body. More...
struct	PowerLawSfd
	Holds the information about a power-law size-frequency distributions. More...
class	InitialConditions
	Object for adding one or more bodies with given material into a Storage. More...
struct	InitialConditions::BodySetup
	Holds data needed to create a single body in addHeterogeneousBody function. More...

Functions
void	repelParticles (ArrayView< Vector > r, const Float radius)
	Displaces particles so that no two particles overlap. More...
Vector	moveToCenterOfMassSystem (ArrayView< const Float > m, ArrayView< Vector > r)
	Modifies particle positions so that their center of mass lies at the origin. More...
void	moveToCenterOfMassSystem (Storage &storage)
	Modifies particle positions and velocities so that the center of mass is at the origin and the total momentum is zero. More...

Detailed Description

Generating initial conditions of SPH particles.

Author

Pavel Sevecek (sevecek at sirrah.troja.mff.cuni.cz)

Date

2016-2021

Definition in file Initial.h.

Function Documentation

moveToCenterOfMassSystem() [1/2]

Vector moveToCenterOfMassSystem	(	ArrayView< const Float >	m,
		ArrayView< Vector >	r
	)

Modifies particle positions so that their center of mass lies at the origin.

Function can be also used for particle velocities, modifying them so that the total momentum is zero.

Parameters

m	Particle masses; must be positive values
r	Particle positions (or velocities)

Returns

Computed center of mass, subtracted from positions.

Definition at line 363 of file Initial.cpp.

moveToCenterOfMassSystem() [2/2]

void moveToCenterOfMassSystem

(

Storage &

storage

)

Modifies particle positions and velocities so that the center of mass is at the origin and the total momentum is zero.

Definition at line 379 of file Initial.cpp.

repelParticles()

void repelParticles	(	ArrayView< Vector >	r,
		const Float	radius
	)

Displaces particles so that no two particles overlap.

In case no particles overlap, function does nothing.

Parameters

r	Positions of particles
radius	Radius of the particles in units of smoothing length.

Definition at line 335 of file Initial.cpp.