Cubic curve skeletal element. More...

#include <archestree.h>

Inheritance diagram for TerraCubic:

Public Member Functions
	TerraCubic (const CubicCurve &, const double &, const double &, const double &, const double &=1.0, bool=true)
	Create a generate cubic curve skeletal element.

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 TerraPrimitive
	TerraPrimitive (const double &=1.0, const double &=1.0)
	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.

double	Alpha (const double &) const
	Compute the falloff function.

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.

Public Attributes
CubicCurve2	cubic
	Cubic curve in the plane.

double	rb
	Offset radius.

bool	cut
	Boolean for round or straight cut.

Static Protected Attributes
static const double	epsilon = 1e-6
	Epsilon value for computing the limit of the curvilinear absisca of a point along the curve.

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

Additional Inherited Members
Protected Attributes inherited from TerraPrimitive
double	alpha = 1.0
	Weight.

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

Detailed Description

Cubic curve skeletal element.

Constructor & Destructor Documentation

◆ TerraCubic()

TerraCubic::TerraCubic	(	const CubicCurve &	c,
		const double &	ra,
		const double &	rb,
		const double &	r,
		const double &	al = 1.0,
		bool	cut = true )

Create a generate cubic curve skeletal element.

Parameters

c	Cubic curve.
ra,rb	Radii.
r	Radius.
al	Alpha.
cut	Boolean, set to true if curve ends with a line segment, false if rounded.

References TerraNode::box, cubic, cut, Math::Max(), rb, and TerraPrimitive::TerraPrimitive().

Referenced by Memory(), and TerraCubicImage::TerraCubicImage().

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, cubic, cut, epsilon, rb, and Cubic::SmoothCompact().

◆ Memory()

int TerraCubic::Memory ( ) const

virtual

Compute the size of a node.

Reimplemented from TerraNode.

Reimplemented in TerraCubicImage.

References TerraCubic().

Public Member Functions

Public Attributes