SDFSmoothUnionExp Class Reference

Smooth union with exponential blend. More...

#include <sdf.h>

Inheritance diagram for SDFSmoothUnionExp:

Public Member Functions
	SDFSmoothUnionExp (SDFNode *, SDFNode *, const double &)
	Create a smooth union.
virtual	~SDFSmoothUnionExp ()
	Destructor.
virtual double	Signed (const Vector &) const
	Compute the signed distance.
QString	GetShader (PrimitiveManager *, std::list< QString > *, bool *) const
	Compute the GLSL code to render the node.
virtual int	Memory () const
	Return the size of a sub-tree.
virtual SDFNode *	Copy () const
	Deep copy.
Public Member Functions inherited from SDFSmoothUnion
	SDFSmoothUnion (SDFNode *, SDFNode *, const double &)
	Create a smooth union.
	SDFSmoothUnion (SDFNode *, SDFNode *, SDFNode *, const double &)
	Create a smooth union.
	SDFSmoothUnion (SDFNode *, SDFNode *, SDFNode *, SDFNode *, const double &)
	Create a smooth union.
virtual	~SDFSmoothUnion ()
	Destructor.
virtual Vector	Gradient (const Vector &) const
	Compute the gradient of the field.
QString	GetCostShader (PrimitiveManager *, std::list< QString > *, bool *) const
	Compute the GLSL code to compute the cost of a call to sdf.
QString	GetGradientShader (PrimitiveManager *, std::list< QString > *, bool *) const
	Compute the GLSL code to compute the gradient the sdf.
Public Member Functions inherited from SDFUnion
	SDFUnion (SDFNode *, SDFNode *)
	Create a union node.
	SDFUnion (SDFNode *, SDFNode *, SDFNode *)
	Create a union hierarchy ((A ∪ B) ∪ C).
	SDFUnion (SDFNode *, SDFNode *, SDFNode *, SDFNode *)
	Create a union hierarchy ((A ∪ B) ∪ (C ∪ D)).
	SDFUnion (const QVector< SDFNode * > &)
	Creates a union operator node given an array of nodes.
virtual	~SDFUnion ()
	Destructor.
double	BID (const Vector &) const
	Compute a lower bound of the signed distance.
virtual void	ComputeCostBID (const Vector &)
	Compute the number of reccursive calls to BID() and Signed().
virtual Color	GetColor (const Vector &) const
	Compute the color.
QString	GetShader (PrimitiveManager *, std::list< QString > *, bool *) const
	Compute the GLSL code to render the node.
QString	GetCostShader (PrimitiveManager *, std::list< QString > *, bool *) const
	Compute the GLSL code to compute the cost of a call to sdf.
QString	GetGradientShader (PrimitiveManager *, std::list< QString > *, bool *) const
	Compute the GLSL code to compute the gradient the sdf.
QString	GetMaterialShader (PrimitiveManager *, std::list< QString > *, bool *) const
	Compute the GLSL code to compute the material the sdf at a given point 'p' with a given normal 'n'.
Public Member Functions inherited from SDFBinary
	SDFBinary (SDFNode *, SDFNode *)
	Create a binary node.
virtual	~SDFBinary ()
	Recursively destroy the sub-trees.
virtual double	K (const Box &) const
	Return the local Lipschitz constant.
virtual void	ComputeCostSigned (const Vector &)
	Compute the number of reccursive calls to Signed().
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 bool	Inside (const Vector &) const
	Check if a point is inside or outside.
virtual double	K () const
	Return the Lipschitz constant of the node.
Box	GetBox () const
	Return the bounding box of the node.

Additional Inherited Members
Static Public Member Functions inherited from SDFUnion
static double	Signed (const double &, const double &)
	Compute the union, i.e. the minimum of two distance field values.
static SDFNode *	QuadricCurve (const double &, const QuadricCurveSet &)
	This function creates a quadric Bézier curve controled by an array of control knots.
static SDFNode *	RevolutionQuadricTubeSet (const Vector &, const Vector &, const double &, const QuadricCurve2Set &)
	Creates a surface of revolution.
static SDFNode *	RevolutionQuadricTubeSet (const double &, const QuadricCurve2Set &)
	Creates a surface of revolution.
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.
Protected Attributes inherited from SDFSmoothUnion
double	smooth
	Smoothing distance.
Protected Attributes inherited from SDFBinary
SDFNode *	e [2] = { nullptr,nullptr }
	Sub-trees.
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.
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

Smooth union with exponential blend.

Constructor & Destructor Documentation

SDFSmoothUnionExp()

SDFSmoothUnionExp::SDFSmoothUnionExp ( SDFNode * a, SDFNode * b, const double & s )

explicit

Create a smooth union.

Resembles the blending operator of the BlobTree.

Parameters

a,b	Sub-trees.
s	Smoothing distance.

Member Function Documentation

GetShader()

QString SDFSmoothUnionExp::GetShader ( PrimitiveManager * primitives, std::list< QString > * dependency, bool * valid_glsl ) const

virtual

Compute the GLSL code to render the node.

Author

Hubert-Brierre Pierre

Reimplemented from SDFSmoothUnion.

Memory()

int SDFSmoothUnionExp::Memory ( ) const

virtual

Return the size of a sub-tree.

Reimplemented from SDFSmoothUnion.

Signed()

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

virtual

Compute the signed distance.

Parameters

p

Point.

Generalized exponential smoothing function between two distances.

This is the Mellowmax, a non-expansive operator, with a coefficient -alpha the asymptotically converges to minimum. This operator can be viewed as a particular instantiation of the quasi-arithmetic mean.

Reimplemented from SDFSmoothUnion.