TerraVertexNoiseRydge Class Reference

Ridged noise over a disc. More...

#include <archestree.h>

Inheritance diagram for TerraVertexNoiseRydge:

Public Member Functions
	TerraVertexNoiseRydge (const Vector &, double, double, int, double, double, double, double, const double &, const double &=1.0)
	Creates a flat disc primitive.
	TerraVertexNoiseRydge (const Vector2 &, const double &, const double &, const AnalyticMusgrave &)
	Creates a flat disc primitive.
virtual ScalarAlpha	ElevationAlpha (const Vector2 &) const
	Compute the elevation and weight.
virtual int	Memory () const
	Compute the size of a node.
Public Member Functions inherited from TerraVertex
	TerraVertex (const Vector &, const double &, const double &=1.0)
	Create a flat point primitive.
	TerraVertex (const Vector &, const Vector &, const double &, const double &=1.0)
	Create a disc primitive.
	TerraVertex (const Vector &, const Vector2 &, const double &, const double &=1.0)
	Create a disc primitive.
virtual void	Draw (QGraphicsScene &) const
	Renders the node into a QGraphicsScene.
Public Member Functions inherited from TerraPrimitive
	TerraPrimitive (const double &=1.0, const double &=1.0)
	Create a primitive.
	~TerraPrimitive ()
	Recusively destroy the sub-trees.
int	Traversal (const Vector2 &) const
	Compute the number of nodes that are traversed when evaluating the tree.
double	Alpha (const double &) const
	Compute the falloff function.
Public Member Functions inherited from TerraNode
	TerraNode (const Box2 &=Box2::Infinity)
	Create a node.
virtual Box2	GetBox () const
	Returns the bouding box of a node.
virtual double	Elevation (const Vector2 &) const
	Compute the elevation at a given position.
virtual double	Alpha (const Vector2 &) const
	Compute the alpha mask at a given position.
virtual Vector2	Gradient (const Vector2 &) const
	Compute the gradient at a given position.
virtual Vector	Normal (const Vector2 &) const
	Compute the normal at a given position.
virtual void	writeJson (QJsonObject &)
	Compute the Json Document of the subtree.
ScalarField2	Sample (const Array2 &) const
	Create a discrete scalar field by sampling the elevation over a given domain.
ScalarField2	Alpha (const Array2 &) const
	Create a discrete scalar field by sampling the elevation over a given domain.
void	Blend (HeightField &) const
	Blend a given node with an existing terrain over an input heightfield.
void	Add (HeightField &) const
	Add a given node with an existing heightfield.

Additional Inherited Members
Protected Attributes inherited from TerraVertex
Vector	c
	Center, includes elevation.
Vector2	slope
	Slope along x and y directions.
Protected Attributes inherited from TerraPrimitive
double	alpha = 1.0
	Weight.
Protected Attributes inherited from TerraNode
Box2	box = Box2::Infinity
	Bounding box.
Static Protected Attributes inherited from TerraNode
static const double	epsilon = 1e-2
	Epsilon value for gradient computations.

Detailed Description

Ridged noise over a disc.

Constructor & Destructor Documentation

TerraVertexNoiseRydge() [1/2]

TerraVertexNoiseRydge::TerraVertexNoiseRydge ( const Vector & p, double lac, double H, int oc, double off, double gain, double a, double s, const double & r, const double & q = 1.0 )

explicit

Creates a flat disc primitive.

Parameters

p	Center.
r	Radius.
lac	Lacunarity.
H	Height.
oc	Octaves.
off	Offset;
gain	Gain.
a	Amplitude
s	Frequency of the noise
r	Radius.
q	Alpha.

References TerraVertex::c, and TerraVertex::TerraVertex().

Referenced by Memory().

TerraVertexNoiseRydge() [2/2]

TerraVertexNoiseRydge::TerraVertexNoiseRydge ( const Vector2 & p, const double & r, const double & q, const AnalyticMusgrave & am )

explicit

Creates a flat disc primitive.

Parameters

p	Center.
r	Radius.
q	Alpha.
am	Field.

References TerraVertex::TerraVertex().

Member Function Documentation

ElevationAlpha()

ScalarAlpha TerraVertexNoiseRydge::ElevationAlpha ( const Vector2 & p ) const

virtual

Compute the elevation and weight.

Parameters

p

Point.

Reimplemented from TerraVertex.

References TerraPrimitive::Alpha(), TerraNode::box, and TerraVertex::c.

Memory()

int TerraVertexNoiseRydge::Memory ( ) const

virtual

Compute the size of a node.

Reimplemented from TerraVertex.

References TerraVertexNoiseRydge().