A twisting operator. More...

#include <archestree.h>

Inheritance diagram for TerraTwist:

Public Member Functions
	TerraTwist (TerraNode *, const Twist2 &)
	Create a twisting operator.

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 TerraUnary
	TerraUnary (TerraNode *)
	Create an unary node.

	~TerraUnary ()
	Recusively destroy the sub-tree.

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

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
Twist2	twist
	Warping.

Protected Attributes inherited from TerraUnary
TerraNode *	node = nullptr
	Sub-tree.

Protected Attributes inherited from TerraNode
Box2	box = Box2::Infinity
	Bounding box.

Additional Inherited Members
Static Public Member Functions inherited from TerraUnary
static TerraNode *	PutAt (TerraNode *, const Vector &, const double &, const Vector2 &)
	Place a node at a given location.

static TerraNode *	PutAt (TerraNode *, const double &, const Vector2 &)
	Place a node at a given location.

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

Detailed Description

A twisting operator.

Constructor & Destructor Documentation

◆ TerraTwist()

TerraTwist::TerraTwist	(	TerraNode *	node,
		const Twist2 &	t )

Create a twisting operator.

Parameters

node	Sub-tree.
t	Twist.

References TerraNode::box, TerraUnary::node, TerraUnary::TerraUnary(), and twist.

Referenced by Memory().

Member Function Documentation

◆ ElevationAlpha()

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

virtual

Compute the elevation and weight.

Parameters

p Point.

Reimplemented from TerraNode.

References TerraNode::box, TerraUnary::node, and twist.

◆ Memory()

int TerraTwist::Memory ( ) const

virtual

Compute the size of a node.

Reimplemented from TerraUnary.

References TerraUnary::node, and TerraTwist().

Public Member Functions