TerraPlateau Class Reference

A plateau operator. More...

#include <archestree.h>

Inheritance diagram for TerraPlateau:

Public Member Functions
	TerraPlateau (TerraNode *, const Vector2 &, const double &, const double &, const double &, const double &=0.25)
	Create a plateau operator. More...
virtual ScalarAlpha	ElevationAlpha (const Vector2 &) const
	Compute the elevation and weight. More...
void	Draw (QGraphicsScene &) const
	Renders the node into a QGraphicsScene. More...
int	Memory () const
	Compute the size of a node. More...
Public Member Functions inherited from TerraUnary
	TerraUnary (TerraNode *)
	Create an unary node. More...
	~TerraUnary ()
	Recusively destroy the sub-tree.
virtual int	Traversal (const Vector2 &) const
	Compute the number of nodes that are traversed when evaluating the tree. 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...

Protected Attributes
double	b
	Elevations.
Circle2	circle
	Domain.
double	flat
	Coefficient.
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. More...
static TerraNode *	PutAt (TerraNode *, const double &, const Vector2 &)
	Place a node at a given location. More...
Static Protected Attributes inherited from TerraNode
static const double	epsilon = 1e-2
	Epsilon value for gradient computations.

Detailed Description

A plateau operator.

Constructor & Destructor Documentation

TerraPlateau()

TerraPlateau::TerraPlateau ( TerraNode *  node, const Vector2 &  c, const double &  r, const double &  a, const double &  b, const double &  f = 0.25  )

explicit

Create a plateau operator.

Parameters

node	Argument node.
c	Center.
r	Radius.
a,b	Elevation range.
f	Flatness coefficient.

References b, and flat.

Referenced by Memory().

Member Function Documentation

Draw()

void TerraPlateau::Draw ( QGraphicsScene &  scene ) const

virtual

Renders the node into a QGraphicsScene.

Parameters

scene

The scene.

Reimplemented from TerraNode.

References circle, and Circle2::Draw().

ElevationAlpha()

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

virtual

Compute the elevation and weight.

Parameters

p

Point.

Implements TerraUnary.

References ScalarAlpha::Alpha(), b, TerraNode::box, Circle2::Center(), circle, TerraNode::ElevationAlpha(), flat, Box2::Inside(), Circle2::Inside(), TerraUnary::node, Circle2::Radius(), Cubic::SmoothCompact(), Math::Sqr(), Linear::Step(), and ScalarAlpha::Value().

Memory()

int TerraPlateau::Memory ( ) const

virtual

Compute the size of a node.

Reimplemented from TerraUnary.

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