SimpleTransformable Class Reference
[Basic]
Simple implementation of Transformable. More...
#include <SimpleTransformable.hpp>
Public Member Functions | |
| SimpleTransformable (const Tag &tag) | |
| virtual void | associate () |
| virtual Extent | getExtent () |
| virtual Vector | getPosition () |
| virtual void | onNodeEvent (NodeEvent &event) |
Protected Member Functions | |
| void | updatePositionExtent () |
Private Attributes | |
| bool | valid |
| list< Transformation * > | transforms |
| Extent | extent |
| Vector | position |
Detailed Description
Simple implementation of Transformable.
Member Function Documentation
| Extent getExtent | ( | ) | [virtual] |
- Returns:
- Model-matrix boundaries of the item in the scene.
- See also:
- getPosition()
Implements Transformable.
| Vector getPosition | ( | ) | [virtual] |
- Returns:
- Model-matrix position of the item in the scene.
Lazily calculates the position only when requested and the position is determined to be invalid. Currently this is implemented by adding listeners to all the Transform ancestors of the shape. When one of the transforms is modified a flag is set to invalid. After the position is requested and calculated again the flag is set to valid. This way it can be requested multiple times but only calculated once when it is needed.
- Note:
- To find the depth of the shape on screen, multiply this value by the current canvas' rotation matrix and take the z component.
Implements Transformable.
| void onNodeEvent | ( | NodeEvent & | event | ) | [inline, virtual] |
Invalidates the position when a transform changes.
Implements NodeListener.
Reimplemented in Boolean.
| void updatePositionExtent | ( | ) | [protected] |
Updates the position and extent, then validates the position.
The documentation for this class was generated from the following files:
- SimpleTransformable.hpp
- SimpleTransformable.cpp
