TerraUnary Class Reference

Unary operators. More...

#include <archestree.h>

Inheritance diagram for TerraUnary:

Public Member Functions
	TerraUnary (TerraNode *)
	Create an unary node. More...
	~TerraUnary ()
	Recusively destroy the sub-tree.
virtual ScalarAlpha	ElevationAlpha (const Vector2 &) const =0
	Compute the elevation and weight. More...
virtual int	Traversal (const Vector2 &) const
	Compute the number of nodes that are traversed when evaluating the tree. More...
virtual int	Memory () const
	Compute the size of a node. 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...
virtual void	Draw (QGraphicsScene &) const
	Renders the node into a QGraphicsScene. More...

Static Public Member Functions
static TerraNode *	PutAt (TerraNode *, const Vector &, const double &, const Vector2 &)
	Place a node at a given location. More...
static TerraNode *	PutAt (TerraNode *, const double &, const Vector2 &)
	Place a node at a given location. More...

Protected Attributes
TerraNode *	node = nullptr
	Sub-tree.
Protected Attributes inherited from TerraNode
Box2	box = Box2::Infinity
	Bounding box.

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

Detailed Description

Unary operators.

Constructor & Destructor Documentation

TerraUnary()

TerraUnary::TerraUnary ( TerraNode *  a )

explicit

Create an unary node.

Parameters

a

Sub-tree.

References TerraNode::box, TerraNode::GetBox(), and node.

Referenced by Memory().

Member Function Documentation

ElevationAlpha()

virtual ScalarAlpha TerraUnary::ElevationAlpha ( const Vector2 &  ) const

pure virtual

Compute the elevation and weight.

Parameters

p

Point.

Reimplemented from TerraNode.

Implemented in TerraRotate, TerraTransform, TerraPlateau, TerraScale, TerraDiscCut, TerraClampWeight, TerraTranslate, TerraWarpNoise, TerraTwist, TerraCircleWarp, TerraSmooth, and TerraAddMusgrave.

Memory()

int TerraUnary::Memory ( ) const

virtual

Compute the size of a node.

Reimplemented from TerraNode.

Reimplemented in TerraRotate, TerraTransform, TerraPlateau, TerraScale, TerraDiscCut, TerraClampWeight, TerraTranslate, TerraWarpNoise, TerraTwist, and TerraCircleWarp.

References TerraNode::Memory(), node, and TerraUnary().

PutAt() [1/2]

TerraNode * TerraUnary::PutAt ( TerraNode *  node, const double &  a, const Vector2 &  t  )

static

Place a node at a given location.

Parameters

node	Sub-tree.
a	Rotation angle.
t	Translation vector

References node.

PutAt() [2/2]

TerraNode * TerraUnary::PutAt ( TerraNode *  node, const Vector &  s, const double &  a, const Vector2 &  t  )

static

Place a node at a given location.

Parameters

node	Sub-tree.
s	Scale.
a	Rotation angle.
t	Translation vector

References node.

Traversal()

int TerraUnary::Traversal ( const Vector2 &  p ) const

virtual

Compute the number of nodes that are traversed when evaluating the tree.

Parameters

p

Point.

Reimplemented from TerraNode.

Reimplemented in TerraAddMusgrave.

References TerraNode::box, Box2::Inside(), node, and TerraNode::Traversal().