Generic n-ary operators in the tree. More...

#include <archestree.h>

Inheritance diagram for TerraOperator:

Public Member Functions
	TerraOperator (const QVector< TerraNode * > &)
	Create a generic operator.

	TerraOperator (TerraNode , TerraNode =nullptr, TerraNode =nullptr, TerraNode =nullptr)
	Create a node with several children nodes.

	~TerraOperator ()
	Recursively destroys the complete sub-tree.

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

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 ScalarAlpha	ElevationAlpha (const Vector2 &) const
	Compute the elevation and weight.

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.

virtual int	Traversal (const Vector2 &) const
	Compute the number of nodes that are traversed when evaluating the tree.

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
QVector< TerraNode * >	nodes
	Array of nodes that will be combined.

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

Generic n-ary operators in the tree.

Combination nodes should derive from this class.

Constructor & Destructor Documentation

◆ TerraOperator() [1/2]

TerraOperator::TerraOperator ( const QVector< TerraNode * > & nodes )

explicit

Create a generic operator.

Parameters

nodes Sub-tree nodes.

References TerraNode::box, and nodes.

Referenced by TerraBlend::TerraBlend(), and TerraBlend::TerraBlend().

◆ TerraOperator() [2/2]

TerraOperator::TerraOperator	(	TerraNode *	a,
		TerraNode *	b = nullptr,
		TerraNode *	c = nullptr,
		TerraNode *	d = nullptr )

explicit

Create a node with several children nodes.

Note that the first two argments should not be 0.

Parameters

a,b,c,d Argument children.

References TerraNode::box, nodes, and TerraNode::TerraNode().

Member Function Documentation

◆ Memory()

int TerraOperator::Memory ( ) const

virtual

Compute the size of a node.

Reimplemented from TerraNode.

References nodes.

Public Member Functions