#include <Inventor/nodes/SoSurroundScale.h>
Inheritance diagram for SoSurroundScale:
Public Member Functions | |
SoSurroundScale (void) | |
void | invalidate (void) |
virtual void | doAction (SoAction *action) |
void | setDoingTranslations (const SbBool val) |
SbBool | isDoingTranslations (void) |
Static Public Member Functions | |
void | initClass (void) |
Public Attributes | |
SoSFInt32 | numNodesUpToContainer |
SoSFInt32 | numNodesUpToReset |
Protected Member Functions | |
virtual | ~SoSurroundScale () |
virtual void | callback (SoCallbackAction *action) |
virtual void | GLRender (SoGLRenderAction *action) |
virtual void | getBoundingBox (SoGetBoundingBoxAction *action) |
virtual void | getMatrix (SoGetMatrixAction *action) |
virtual void | pick (SoPickAction *action) |
void | updateMySurroundParams (SoAction *action, const SbMatrix &inv) |
void | setIgnoreInBbox (const SbBool val) |
SbBool | isIgnoreInBbox (void) |
Protected Attributes | |
SbVec3f | cachedScale |
SbVec3f | cachedInvScale |
SbVec3f | cachedTranslation |
SbBool | cacheOK |
SbBool | doTranslations |
This node calculates a transformation (a translation and a scale) which will, when the node is traversed, be appended to the current model matrix, making a default cube placed directly to the right of this node in the graph surround geometry to the right of the container branch this node is on. The container is specified by the field SoSurroundScale::numNodesUpToContainer.
When calculating the bounding box to be surrounded, the bounding box action will be applied to the container node, and the bounding box calculations will be reset after traversing the node specified by the field SoSurroundScale::numNodesUpToReset.
Here's a complete, stand-alone example which sets up am SoTrackballDragger (connected to a cube), uses an SoSurroundScale node to make it auto-scale to the size of the high cube and translates it an offset to one side of the cube:
#include <Inventor/Qt/SoQt.h> #include <Inventor/Qt/viewers/SoQtExaminerViewer.h> #include <Inventor/draggers/SoTrackballDragger.h> #include <Inventor/nodes/SoAntiSquish.h> #include <Inventor/nodes/SoSeparator.h> #include <Inventor/nodes/SoCube.h> #include <Inventor/nodes/SoSurroundScale.h> #include <Inventor/nodes/SoRotation.h> #include <Inventor/nodes/SoTranslation.h> int main(int argc, char **argv) { QWidget * window = SoQt::init(argv[0]); if (window == NULL) exit(1); SoSeparator * root = new SoSeparator; root->ref(); SoSeparator * surroundsep = new SoSeparator; root->addChild(surroundsep); SoTranslation * translation = new SoTranslation; translation->translation = SbVec3f(12, 0, 0); surroundsep->addChild(translation); SoSurroundScale * ss = new SoSurroundScale; ss->numNodesUpToReset = 1; ss->numNodesUpToContainer = 2; surroundsep->addChild(ss); SoAntiSquish * antisquish = new SoAntiSquish; antisquish->sizing = SoAntiSquish::BIGGEST_DIMENSION; surroundsep->addChild(antisquish); SoTrackballDragger * dragger = new SoTrackballDragger; surroundsep->addChild(dragger); SoRotation * rotation = new SoRotation; rotation->rotation.connectFrom(& dragger->rotation); root->addChild(rotation); SoCube * cube = new SoCube; cube->height = 10.0f; root->addChild(cube); SoQtExaminerViewer * viewer = new SoQtExaminerViewer(window); viewer->setSceneGraph(root); viewer->setViewing(FALSE); viewer->setDecoration(FALSE); viewer->show(); SoQt::show(window); SoQt::mainLoop(); delete viewer; root->unref(); return 0; }
It might be easier to see how the SoSurroundScale node works in the above example by looking at the actual scenegraph:
#Inventor V2.1 ascii Separator { Separator { Translation { translation 12 0 0 } SurroundScale { numNodesUpToContainer 2 numNodesUpToReset 1 } AntiSquish { sizing BIGGEST_DIMENSION } DEF +0 TrackballDragger { } } Rotation { rotation 0 0 1 0 = USE +0 . rotation } Cube { height 10 } }
This node is internally used by manipulators to make it possible for them to scale their dragger's geometry to match the scenegraph geometry it is modifying, as is demonstrated above (but outside of the context of a manipulator).
It is also generally useful for application programmers who want any particular piece of geometry surround other geometry of unknown or changing extent.
SoSurroundScale nodes in the scenegraph is often paired up with SoAntiSquish nodes to get uniform scaling along all three principal axes.
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Constructor. |
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Destructor. |
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Sets up initialization for data common to all instances of this class, like submitting necessary information to the Coin type system. Reimplemented from SoTransformation. |
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Invalidates the cached transformation, forcing a recalculation to be done the next time this node is traversed. |
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This function performs the typical operation of a node for any action. Reimplemented from SoNode. |
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Sets whether the translation part of the transformation should be ignored or not. Default behavior is to translate. |
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Returns whether the translation part of the transformation should be ignored or not.
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Action method for SoCallbackAction. Simply updates the state according to how the node behaves for the render action, so the application programmer can use the SoCallbackAction for extracting information about the scene graph. Reimplemented from SoNode. |
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Action method for the SoGLRenderAction. This is called during rendering traversals. Nodes influencing the rendering state in any way or who wants to throw geometry primitives at OpenGL overrides this method. Reimplemented from SoNode. |
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Action method for the SoGetBoundingBoxAction. Calculates bounding box and center coordinates for node and modifies the values of the action to encompass the bounding box for this node and to shift the center point for the scene more towards the one for this node. Nodes influencing how geometry nodes calculates their bounding box also overrides this method to change the relevant state variables. Reimplemented from SoNode. |
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Action method for SoGetMatrixAction. Updates action by accumulating with the transformation matrix of this node (if any). Reimplemented from SoNode. |
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Action method for SoPickAction. Does common processing for SoPickAction action instances. Reimplemented from SoNode. |
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Calculates the translation and scale needed to make a default cube surround geometry to the right of the branch this node is on. |
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Sets whether bounding box calculations in SoGetBoundingBoxAction should be affected by this node. Default is to ignore our bounding box calculations. |
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Returns the value of the flag that decides whether bounding box calculations in SoGetBoundingBoxAction should be affected by this node.
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Number of nodes in the path counting from this and "upwards" to the container node. |
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Number of nodes in the path counting from this and "upwards" to the node where we will reset the bounding box value. |
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This API member is considered internal to the library, as it is not likely to be of interest to the application programmer. |
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This API member is considered internal to the library, as it is not likely to be of interest to the application programmer. |
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This API member is considered internal to the library, as it is not likely to be of interest to the application programmer. |
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This API member is considered internal to the library, as it is not likely to be of interest to the application programmer. |
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This API member is considered internal to the library, as it is not likely to be of interest to the application programmer. |