Terra 1.0
|
Rotation operator. More...
#include <archestree.h>
Public Member Functions | |
TerraRotate (TerraNode *, const double &, const Vector2 &=Vector2::Null) | |
Create a rotation node. More... | |
~TerraRotate () | |
Recursively destroys the sub-tree. | |
ScalarAlpha | ElevationAlpha (const Vector2 &) const |
Compute the elevation and weight. More... | |
virtual int | Memory () const |
Compute the size of a node. More... | |
![]() | |
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... | |
![]() | |
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... | |
Protected Attributes | |
Vector2 | c |
Rotation center. | |
Matrix2 | r |
Rotation matrix. | |
![]() | |
TerraNode * | node = nullptr |
Sub-tree. | |
![]() | |
Box2 | box = Box2::Infinity |
Bounding box. | |
Additional Inherited Members | |
![]() | |
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 const double | epsilon = 1e-2 |
Epsilon value for gradient computations. | |
Rotation operator.
|
explicit |
Create a rotation node.
n | Sub-tree. |
a | Angle of rotation (radians). |
c | Center of rotation. |
References TerraNode::box, c, TerraNode::GetBox(), TerraUnary::node, r, Box2::Rotated(), Matrix2::Rotation(), and Box2::Translated().
Referenced by Memory().
|
virtual |
Compute the elevation and weight.
p | Point. |
Implements TerraUnary.
References TerraNode::box, c, TerraNode::ElevationAlpha(), ScalarAlpha::Empty, Box2::Inside(), TerraUnary::node, and r.
|
virtual |
Compute the size of a node.
Reimplemented from TerraUnary.
References TerraNode::Memory(), TerraUnary::node, and TerraRotate().