Node to draw arbitrary polygon. More...
#include <GeometryNode.h>
Public Member Functions | |
| GeometryNode (SceneManager *sceneManager, const char *initID) | |
| virtual void | callbackUpdate (osg::NodeVisitor *nv) |
| virtual void | updateStateSet () |
| void | setNumVertices (int i) |
| void | setVertex (int index, float x, float y, float z) |
| void | setColor (int index, float red, float green, float blue, float alpha) |
| void | setTexCoord (int index, float x, float y) |
| void | setSingleSided (int singleSided) |
| int | getSingleSided () const |
| virtual std::vector< lo_message > | getState () const |
Detailed Description
Node to draw arbitrary polygon.
Allow a low-level specification of a mesh by providing arrays of vertices, colors, and texture coordinates.
Member Function Documentation
| void spin::GeometryNode::callbackUpdate | ( | osg::NodeVisitor * | nv | ) | [virtual] |
For nodes that require regular programmatic control, there is a callback that is evaluated with every refresh. This function can thus be used for animations, or any other periodic updates.
Note that changes to the scene graph structure (eg, moving/deleting nodes should NOT be done within this callback because traversals stacks will become corrupted. The technique is rather to enable a flag and then do the actual change in the SceneManager::updateGraph() method.
Reimplemented from spin::GroupNode.
| std::vector< lo_message > spin::GeometryNode::getState | ( | ) | const [virtual] |
For each subclass of ReferencedNode, we override the getState() method to fill the vector with the correct set of methods for this particular node
Reimplemented from spin::GroupNode.
| void spin::GeometryNode::setColor | ( | int | index, |
| float | red, | ||
| float | green, | ||
| float | blue, | ||
| float | alpha | ||
| ) |
Update the color of one vertex in the geometry, using an index.
| void spin::GeometryNode::setNumVertices | ( | int | i | ) |
Sets the number of vertices that this geometry is supposed to have.
This should be a multiple of 3 if you want to draw using GL_TRIANGLES or amultiple of 4 if you want to draw using GL_QUADS. Anything else will draw using GL_LINES.
If you grow the number of vertices, all new vertices will be created with default values: position of (0,0,0), full white color, and texcoords of (0,0).
| void spin::GeometryNode::setSingleSided | ( | int | singleSided | ) |
Specify whether both sides or only one side of the shape is rendered. ie, whether the backface is culled or not.
| void spin::GeometryNode::setTexCoord | ( | int | index, |
| float | x, | ||
| float | y | ||
| ) |
Update the texture coord of one vertex in the geometry, using an index.
| void spin::GeometryNode::setVertex | ( | int | index, |
| float | x, | ||
| float | y, | ||
| float | z | ||
| ) |
Update the position of one vertex in the geometry, using an index.
| void spin::GeometryNode::updateStateSet | ( | ) | [virtual] |
This method actually applies the stateset to the subgraph, replacing any existing stateset with this one. The setStateSet and setStateSetFromFile methods just set the stateset_ symbol, while updateStateSet does the actual work.
Override this method in subclasses in order to change how stateset should be applied. For example, to which node in the subgraph it should be attached, or whether it should be merged with the existing stateset (rather than merged).
By default it is applied to the mainTransform_.
Reimplemented from spin::GroupNode.
The documentation for this class was generated from the following files:
- include/GeometryNode.h
- src/spin/GeometryNode.cpp
