TerraFrame Class Reference

Transformation operator. More...

#include <archestree.h>

Inheritance diagram for TerraFrame:

Public Member Functions
	TerraFrame (TerraNode *, const Frame2 &)
	Create a transformation node.
	TerraFrame (TerraNode *, const double &, const Vector2 &=Vector2::Null)
	Create a rotation node.
	~TerraFrame ()
	Recursively destroys the sub-tree.
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
Frame2	frame = Frame2::Id
	Frame.
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 Protected Attributes inherited from TerraNode
static const double	epsilon = 1e-2
	Epsilon value for gradient computations.

Detailed Description

Transformation operator.

Constructor & Destructor Documentation

TerraFrame() [1/2]

TerraFrame::TerraFrame ( TerraNode * n, const Frame2 & f )

explicit

Create a transformation node.

Parameters

n	Sub-tree.
f	Frame.

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

Referenced by Memory(), and TerraFrame().

TerraFrame() [2/2]

TerraFrame::TerraFrame ( TerraNode * n, const double & a, const Vector2 & c = Vector2::Null )

explicit

Create a rotation node.

Parameters

n	Sub-tree.
a	Angle of rotation (radians).
c	Center of rotation.

References TerraFrame().

Member Function Documentation

ElevationAlpha()

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

virtual

Compute the elevation and weight.

Parameters

p

Point.

Reimplemented from TerraNode.

References TerraNode::box, ScalarAlpha::Empty, frame, and TerraUnary::node.

Memory()

int TerraFrame::Memory ( ) const

virtual

Compute the size of a node.

Reimplemented from TerraUnary.

References TerraUnary::node, and TerraFrame().