Height field node. More...

#include <archestree.h>

Inheritance diagram for TerraVertexImage:

Public Member Functions
	TerraVertexImage (const Vector2 &, const double &, const double &, const QString &)
	Create the node.

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 TerraField
	TerraField (const QString &)
	Create the node.

	TerraField (const QString &, const QString &)
	Create an image primitive.

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.

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

Additional Inherited Members
Static Public Member Functions inherited from TerraField
static void	Store (const ScalarField2 &, const QString &)
	Store an image in the set of image instances.

static void	Store (const QImage &, const QString &)
	Store an image in the set of image instances.

static void	Store (const QString &, const QString &)
	Store an image in the set of image instances.

Protected Member Functions inherited from TerraField
const ScalarField2 &	GetImage (int) const
	Get the reference to the k-th image in the atlas.

Static Protected Member Functions inherited from TerraField
static bool	ExistsInStorage (const QString &)
	Checks if an image exists in the atlas.

static int	IndexInStorage (const QString &)
	Checks if an image exists in the atlas, and returns its index.

Protected Attributes inherited from TerraField
int	alf = -1
	Indexes storing the reference to the field and the alpha mask.

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 TerraField
static QVector< ScalarField2 >	images
	Set of images that will be shared by the instances of TerraField.

static QVector< QString >	aliases
	Identifier as names of the images.

Static Protected Attributes inherited from TerraNode
static const double	epsilon = 1e-2
	Epsilon value for gradient computations.

Detailed Description

Height field node.

Constructor & Destructor Documentation

◆ TerraVertexImage()

TerraVertexImage::TerraVertexImage	(	const Vector2 &	c,
		const double &	r,
		const double &	a,
		const QString &	s )

Create the node.

Parameters

c	Center.
r	Radius.
a	Alpha.
s	The name of the scalarfield.

References TerraPrimitive::alpha, TerraNode::box, and TerraField::TerraField().

Referenced by Memory().

Member Function Documentation

◆ ElevationAlpha()

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

virtual

Compute the elevation and weight.

Parameters

p Point.

Reimplemented from TerraNode.

References TerraPrimitive::alpha, TerraNode::box, TerraField::GetImage(), Quadric::SmoothCompact(), and ScalarField2::Value().

◆ Memory()

int TerraVertexImage::Memory ( ) const

virtual

Compute the size of a node.