Ridged noise over a disc. More...

#include <archestree.h>

Inheritance diagram for TerraVertexFractal:

Public Member Functions
	TerraVertexFractal (const Vector2 &, const double &, const double &, const SimplexTurbulence2 &)
	Creates a flat disc primitive. More...

virtual ScalarAlpha	ElevationAlpha (const Vector2 &) const
	Compute material at a given point. More...

virtual int	Memory () const
	Compute the size of a node. More...

Public Member Functions inherited from TerraVertex
	TerraVertex (const Vector &, const double &, const double &=1.0)
	Create a point primitive. More...

virtual void	Draw (QGraphicsScene &) const
	Renders the node into a QGraphicsScene. More...

Public Member Functions inherited from TerraSkeleton
	TerraSkeleton (const double &, const double &)
	Create a primitive with a radial falloff function. More...

double	Alpha (const double &) const
	Compute the falloff function. More...

Public Member Functions inherited from TerraPrimitive
	TerraPrimitive ()
	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. More...

Public Member Functions inherited from TerraNode
	TerraNode (const Box2 &=Box2::Infinity)
	Create a node. More...

virtual Box2	GetBox () const
	Returns the bouding box of a node.

virtual double	Elevation (const Vector2 &) const
	Compute the elevation at a given position. More...

virtual double	Alpha (const Vector2 &) const
	Compute the alpha mask at a given position. More...

virtual Vector2	Gradient (const Vector2 &) const
	Compute the gradient at a given position. More...

virtual Vector	Normal (const Vector2 &) const
	Compute the normal at a given position. More...

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. More...

ScalarField2	Alpha (const Array2 &) const
	Create a discrete scalar field by sampling the elevation over a given domain. More...

void	Blend (HeightField &) const
	Blend a given node with an existing terrain over an input heightfield. More...

void	Add (HeightField &) const
	Add a given node with an existing heightfield. More...

Additional Inherited Members
Protected Attributes inherited from TerraVertex
Vector	c
	Center, includes elevation.

Protected Attributes inherited from TerraSkeleton
double	alpha
	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

◆ TerraVertexFractal()

TerraVertexFractal::TerraVertexFractal	(	const Vector2 &	p,
		const double &	r,
		const double &	q,
		const SimplexTurbulence2 &	am
	)

explicit

Creates a flat disc primitive.

Parameters

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

Referenced by Memory().

Member Function Documentation

◆ ElevationAlpha()

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

virtual

Compute material at a given point.

Parameters

p Point.

Reimplemented from TerraVertex.

References TerraSkeleton::Alpha(), TerraNode::box, TerraVertex::c, Box2::Inside(), and SimplexTurbulence2::Value().

◆ Memory()

int TerraVertexFractal::Memory ( ) const

virtual

Compute the size of a node.