TerraAddNoise Class Reference

Add noise to the surface. More...

#include <archestree.h>

Inheritance diagram for TerraAddNoise:

Public Member Functions
	TerraAddNoise (TerraNode *node, const Vector2 &, const double &, const SimplexTurbulence2 &)
	Create a blending node.
virtual ScalarAlpha	ElevationAlpha (const Vector2 &) const
	Compute the weight and the height of a given point in the plane.
void	Draw (QGraphicsScene &) const
	Draw the sub-tree.
int	Traversal (const Vector2 &) const
	Compute the number of nodes that are traversed when evaluating the tree.
Public Member Functions inherited from TerraUnary
	TerraUnary (TerraNode *)
	Create an unary node.
	~TerraUnary ()
	Recusively destroy the 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 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.

Protected Attributes
SimplexTurbulence2	fractal
	Turbulence.
SmoothVertex2	vertex
	Smooth vertex kernel.
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

Add noise to the surface.

This class is an convenience class equivalent to the following sub-tree:

TerraNode* subtree = new TerraVertex(Vector(0.0, 0.0, 5.0), 100.0);
TerraNode* add = new TerraVertexNoise(Vector(0.0, 0.0,0.0), 50.0, SimplexTurbulence2(0.0,5.0,10.0));
TerraNode* sub = new TerraAdd(subtree, add);

Constructor & Destructor Documentation

TerraAddNoise()

TerraAddNoise::TerraAddNoise	(	TerraNode *	node,
		const Vector2 &	c,
		const double &	r,
		const SimplexTurbulence2 &	fractal )

Create a blending node.

Parameters

v	Argument children.

References fractal, TerraUnary::node, TerraUnary::TerraUnary(), and vertex.

Member Function Documentation

ElevationAlpha()

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

virtual

Compute the weight and the height of a given point in the plane.

Parameters

p

Point.

Reimplemented from TerraNode.

References TerraNode::box, fractal, TerraUnary::node, ScalarAlpha::SetValue(), ScalarAlpha::Value(), and vertex.

Traversal()

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

virtual

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

Parameters

p

Point.

Reimplemented from TerraUnary.

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