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The SbLineProjector class projects 2D points to 3D points along a line.The 3D projection of the 2D coordinates is for this projector class constrained to lie along a pre-defined line. More...
#include <Inventor/projectors/SbLineProjector.h>
Public Member Functions | |
SbLineProjector (void) | |
virtual SbProjector * | copy (void) const |
virtual SbVec3f | project (const SbVec2f &point) |
void | setLine (const SbLine &line) |
const SbLine & | getLine (void) const |
virtual SbVec3f | getVector (const SbVec2f &viewpos1, const SbVec2f &viewpos2) |
virtual SbVec3f | getVector (const SbVec2f &viewpos) |
void | setStartPosition (const SbVec2f &viewpos) |
void | setStartPosition (const SbVec3f &point) |
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virtual void | setViewVolume (const SbViewVolume &vol) |
const SbViewVolume & | getViewVolume (void) const |
virtual void | setWorkingSpace (const SbMatrix &space) |
const SbMatrix & | getWorkingSpace (void) const |
Protected Attributes | |
SbLine | line |
SbVec3f | lastPoint |
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SbViewVolume | viewVol |
SbMatrix | worldToWorking |
SbMatrix | workingToWorld |
Additional Inherited Members | |
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SbProjector (void) | |
virtual | ~SbProjector () |
SbLine | getWorkingLine (const SbVec2f &point) const |
float | findVanishingDistance (void) const |
SbBool | verifyProjection (const SbVec3f &projpt) const |
The SbLineProjector class projects 2D points to 3D points along a line.
The 3D projection of the 2D coordinates is for this projector class constrained to lie along a pre-defined line.
Among other places, this is useful within the translation draggers, like for instance SoTranslate1Dragger, where we want to move "pieces" along one or more axes.
SbLineProjector::SbLineProjector | ( | void | ) |
Constructor. Intializes the projector instance to use a line from <0, 0, 0> to <0, 1, 0>.
Referenced by copy().
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Construct and return a copy of this projector. The caller is responsible for destructing the new instance.
Note that if the Coin library has been built as a DLL under Microsoft Windows and you use this method from application code, you must make sure that both the Coin DLL and the application executable is using the same instance of a C Run-Time (CRT) library. Otherwise, you will get memory heap corruption upon deallocating the returned instances, eventually leading to mysterious crashes.
Implements SbProjector.
References SbLineProjector().
Project the 2D point from normalized viewport coordinates to a 3D point. The mapping will be done in accordance with the type of the projector.
Implements SbProjector.
References SbProjector::findVanishingDistance(), SbLine::getClosestPoint(), SbLine::getClosestPoints(), SbViewVolume::getDepth(), SbLine::getDirection(), SbViewVolume::getNearDist(), SbViewVolume::getPlane(), SbLine::getPosition(), SbProjector::getWorkingLine(), SbPlane::intersect(), lastPoint, line, SbMatrix::multLineMatrix(), SbMatrix::multVecMatrix(), SbViewVolume::projectToScreen(), SbProjector::verifyProjection(), SbProjector::viewVol, SbProjector::workingToWorld, and SbProjector::worldToWorking.
Referenced by SoScale1Dragger::drag(), SoTranslate1Dragger::drag(), SoScale2UniformDragger::drag(), SoScaleUniformDragger::drag(), SoTabPlaneDragger::drag(), SoHandleBoxDragger::drag(), getVector(), and setStartPosition().
void SbLineProjector::setLine | ( | const SbLine & | lineref | ) |
Set a new projection line. 3D points will be mapped to be on this line.
References line.
Referenced by SoScale1Dragger::dragStart(), SoTranslate1Dragger::dragStart(), SoScaleUniformDragger::dragStart(), SoScale2UniformDragger::dragStart(), SoTabPlaneDragger::dragStart(), SoHandleBoxDragger::dragStart(), and SoTransformerDragger::dragStart().
const SbLine & SbLineProjector::getLine | ( | void | ) | const |
Returns the currently set projection line.
References line.
void SbLineProjector::setStartPosition | ( | const SbVec2f & | viewpos | ) |
Explicitly set position of initial projection, so we get correct values for later calls to getVector() etc.
void SbLineProjector::setStartPosition | ( | const SbVec3f & | point | ) |
Explicitly set position of initial projection, so we get correct values for later calls to getVector() etc.
References lastPoint.
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The last projected point.
Referenced by getVector(), project(), and setStartPosition().
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