SDFLodSphere Class Reference

Level of detail signed field function. More...

#include <sdf.h>

Inheritance diagram for SDFLodSphere:

Public Member Functions
	SDFLodSphere (SDFNode *, const Vector &, const double &, const double &)
	Create a level of detail node, with a sphere as a low level of detail shape.
virtual	~SDFLodSphere ()
	Destructor.
virtual double	Signed (const Vector &) const
	Compute the signed distance.
virtual int	Memory () const
	Return the size of a sub-tree.
virtual SDFNode *	Copy () const
	Deep copy.
double	K () const
	Return the Lipschitz constant of the node.
Public Member Functions inherited from SDFUnary
	SDFUnary (SDFNode *)
	Create an unary node.
virtual	~SDFUnary ()
	Destroy the sub-tree.
virtual double	K (const Box &) const
	Return the local Lipschitz constant.
virtual QString	GetCostShader (PrimitiveManager *, std::list< QString > *, bool *) const
	Compute the GLSL code to compute the cost of a call to sdf.
virtual QString	GetMaterialShader (PrimitiveManager *, std::list< QString > *, bool *) const
	Compute the GLSL code to compute the material of the sdf.
virtual void	ComputeCostSigned (const Vector &)
	Compute the number of reccursive calls to Signed().
virtual int	Nodes () const
	Compute the number of nodes in the sub-tree.
Public Member Functions inherited from SDFNode
	SDFNode ()
	Create a generic node.
virtual	~SDFNode ()
	Destructor.
virtual double	BID (const Vector &) const
	Compute a lower bound of the signed distance.
virtual Vector	Gradient (const Vector &) const
	Compute the gradient of the field.
virtual bool	Inside (const Vector &) const
	Check if a point is inside or outside.
virtual Color	GetColor (const Vector &) const
	Computes the color.
Box	GetBox () const
	Return the bounding box of the node.
virtual QString	GetShader (PrimitiveManager *, std::list< QString > *, bool *=nullptr) const
	Compute the GLSL code to render the node.
virtual QString	GetGradientShader (PrimitiveManager *, std::list< QString > *, bool *=nullptr) const
	Compute the GLSL code to compute the gradient the sdf.
virtual void	ComputeCostBID (const Vector &)
	Compute the number of reccursive calls to BID() and Signed().

Protected Attributes
Sphere	sphere
	Sphere.
double	re
	External radius.
Protected Attributes inherited from SDFUnary
SDFNode *	e = nullptr
	Sub-tree.
Protected Attributes inherited from SDFNode
Box	box = Box::Infinity
	Box bounding the surface.
double	k = 1.0
	Lipschitz constant.
int	cost = 1
	Relative computation cost.

Additional Inherited Members
Static Public Member Functions inherited from SDFNode
static void	ResetReccursiveCalls ()
	Reset the reccursive call property of the tree.
static int	ReccursiveCalls ()
	Returns the number of reccursive calls to Value() and BID().
static void	addReccursiveCalls (int)
	Add a nulber to the nbreccursiveCalls.
static SDFNode *	Stalactite (const Vector &p, const double &h, const double &r, bool noise=true, Random &random=Random::R239, const double &largeur=0.25, const double &espacement=0.61)
	Procedural parameterized stalactite.
static SDFNode *	SpherePieces ()
	Sphere carved, placed on a cylinder. Nice scene for testing sharp features reconstruction.
Static Protected Attributes inherited from SDFNode
static constexpr double	Epsilon = 0.01
	Small constant used for bounding volumes.
static int	reccursiveCalls = 0
	Recursive calls to BID or Value.

Detailed Description

Level of detail signed field function.

Within the sphere, return the signed distance field of the sub-tree, outside of range, compute the distance to the sphere, otherwise interpolate between the two.

Constructor & Destructor Documentation

SDFLodSphere()

SDFLodSphere::SDFLodSphere ( SDFNode * n, const Vector & c, const double & ri, const double & re )

explicit

Create a level of detail node, with a sphere as a low level of detail shape.

Parameters

n	Sub-tree.
c	Center.
ri,re	Internal and external radius, the sphere shape will have the internal radius.

Member Function Documentation

K()

double SDFLodSphere::K ( ) const

virtual

Return the Lipschitz constant of the node.

By default, nodes are considered as signed Euclidean distance functions, and the Lipschitz constant is λ=1.

Reimplemented from SDFNode.

Memory()

int SDFLodSphere::Memory ( ) const

virtual

Return the size of a sub-tree.

Reimplemented from SDFNode.

Signed()

double SDFLodSphere::Signed ( const Vector & p ) const

virtual

Compute the signed distance.

Parameters

p

Point.

Reimplemented from SDFUnary.