Cubic curve skeletal element. More...

#include <archestree.h>

Inheritance diagram for TerraCubic:

Public Member Functions
	TerraCubic (const Vector &, const Vector &, const Vector &, const Vector &, const double &, const double &)
	Create a generate cubic curve skeletal element. More...

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

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

Public Member Functions inherited from TerraPrimitive
	TerraPrimitive ()
	Create a primitive.

	~TerraPrimitive ()
	Recusively destroy the sub-trees.

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...

virtual void	Draw (QGraphicsScene &) const
	Renders the node into a QGraphicsScene. More...

Public Attributes
Vector	b
	End vertices of the curve.

CubicCurve2	c
	Cubic curve in the plane.

Cubic	z
	Cubic elevation along curve.

double	rb
	Offset radius.

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

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

Detailed Description

Cubic curve skeletal element.

Constructor & Destructor Documentation

◆ TerraCubic()

TerraCubic::TerraCubic	(	const Vector &	a,
		const Vector &	b,
		const Vector &	ta,
		const Vector &	tb,
		const double &	ra,
		const double &	rb
	)

Create a generate cubic curve skeletal element.

Parameters

a,b	Points.
ta,tb	Tangents.

References b, TerraNode::box, c, CubicCurve2::GetBox(), Cubic::Hermite(), and z.

Referenced by Memory().

Member Function Documentation

◆ ElevationAlpha()

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

virtual

Compute the elevation and weight.

Parameters

p Point.

Reimplemented from TerraNode.

Reimplemented in TerraCubicImage.

References TerraNode::box, c, Box2::Inside(), rb, CubicCurve2::UV(), and z.

◆ Memory()

int TerraCubic::Memory ( ) const

virtual

Compute the size of a node.

Reimplemented from TerraNode.

Reimplemented in TerraCubicImage.

References TerraCubic().

Public Member Functions