Grid operators. More...
#include <archestree.h>
Inheritance diagram for TerraGrid:
Public Member Functions | |
| TerraGrid (Box2=Box2(), int=10, int=10, int=1) | |
| Create a grid node. More... | |
| ~TerraGrid () | |
| Recusively destroy the sub-trees. | |
| virtual ScalarAlpha | ElevationAlpha (const Vector2 &) const |
| Compute the elevation and weight. 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. | |
| virtual int | Traversal (const Vector2 &) const |
| Compute the number of nodes that are traversed when evaluating the tree. More... | |
| virtual int | Memory () const |
| Compute the size of a node. | |
| 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 | |
| QVector< TerraNode * > | gridNodes |
| Array of nodes. | |
| 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
Grid operators.
Constructor & Destructor Documentation
◆ TerraGrid()
Create a grid node.
- Parameters
-
bb,nxt,nyt Bounding box, x and y axis subdivison and radius of primitives. n Number of neighbors
References TerraNode::box, Array2::CellSize(), and gridNodes.
Member Function Documentation
◆ ElevationAlpha()
|
virtual |
Compute the elevation and weight.
- Parameters
-
p Point.
Reimplemented from TerraNode.
References ScalarAlpha::Alpha(), Array2::AreaInteger(), TerraNode::box, Array2::CellIndex(), Array2::CellInteger(), TerraNode::ElevationAlpha(), gridNodes, Box2::Inside(), and ScalarAlpha::Value().
