TerraQuadrangleImage Class Reference

Image-based height field nodes. More...

#include <archestree.h>

Inheritance diagram for TerraQuadrangleImage:

Public Member Functions
	TerraQuadrangleImage (const QString &, const QString &, const Quadrangle &)
	Create the node.
	TerraQuadrangleImage (const QString &, const Quadrangle &, const double &=1.0)
	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.

Protected Attributes
Quadrangle	q
	Location of quad where the image maps.
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.

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.
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

Image-based height field nodes.

Constructor & Destructor Documentation

TerraQuadrangleImage() [1/2]

TerraQuadrangleImage::TerraQuadrangleImage	(	const QString &	h,
		const QString &	a,
		const Quadrangle &	q )

Create the node.

Parameters

h,a	The name of the scalarfield and the alpha mask.
q	Quadrangle.
beta	Importance.

References TerraNode::box, q, and TerraField::TerraField().

Referenced by Memory().

TerraQuadrangleImage() [2/2]

TerraQuadrangleImage::TerraQuadrangleImage	(	const QString &	h,
		const Quadrangle &	q,
		const double &	beta = 1.0 )

Create the node.

Parameters

h	The name of the scalarfield.
q	Quadrangle.
beta	Importance.

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

Member Function Documentation

ElevationAlpha()

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

virtual

Compute the elevation and weight.

Parameters

p

Point.

Reimplemented from TerraNode.

References Math::BiCubic(), TerraNode::box, Box2::Diagonal(), TerraField::GetImage(), q, and ScalarField2::Value().

Memory()

int TerraQuadrangleImage::Memory ( ) const

virtual

Compute the size of a node.

Reimplemented from TerraNode.

References TerraQuadrangleImage().