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The SbPlaneProjector class projects 2D points to 3D points in a plane.The 3D projection of the 2D coordinates is for this projector class constrained to lie inside a pre-defined 3D plane. More...
#include <Inventor/projectors/SbPlaneProjector.h>
Public Member Functions | |
SbPlaneProjector (const SbBool orient=0) | |
SbPlaneProjector (const SbPlane &plane, const SbBool orient=0) | |
virtual SbProjector * | copy (void) const |
virtual SbVec3f | project (const SbVec2f &point) |
void | setPlane (const SbPlane &plane) |
const SbPlane & | getPlane (void) const |
void | setOrientToEye (const SbBool orienttoeye) |
SbBool | isOrientToEye (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 Member Functions | |
void | setupPlane (void) |
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SbProjector (void) | |
virtual | ~SbProjector () |
SbLine | getWorkingLine (const SbVec2f &point) const |
float | findVanishingDistance (void) const |
SbBool | verifyProjection (const SbVec3f &projpt) const |
Protected Attributes | |
SbPlane | plane |
SbPlane | nonOrientPlane |
SbBool | orientToEye |
SbBool | needSetup |
SbVec3f | lastPoint |
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SbViewVolume | viewVol |
SbMatrix | worldToWorking |
SbMatrix | workingToWorld |
The SbPlaneProjector class projects 2D points to 3D points in a plane.
The 3D projection of the 2D coordinates is for this projector class constrained to lie inside a pre-defined 3D plane.
SbPlaneProjector::SbPlaneProjector | ( | const SbBool | orient = 0 | ) |
Constructor. Sets up a projection plane parallel with the XY-plane in world coordinates.
Referenced by copy().
SbPlaneProjector::SbPlaneProjector | ( | const SbPlane & | plane, |
const SbBool | orient = 0 |
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Constructor taking an explicit projection plane definition.
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virtual |
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 SbPlaneProjector().
Projects 2D point into a 3D point within the current projection plane.
Implements SbProjector.
References SbProjector::findVanishingDistance(), SbLine::getClosestPoints(), SbViewVolume::getDepth(), SbLine::getDirection(), SbPlane::getDistance(), SbViewVolume::getNearDist(), SbPlane::getNormal(), SbViewVolume::getPlane(), SbLine::getPosition(), SbViewVolume::getProjectionType(), SbProjector::getWorkingLine(), SbPlane::intersect(), SbMatrix::multLineMatrix(), SbMatrix::multVecMatrix(), needSetup, SbViewVolume::ORTHOGRAPHIC, plane, SoDebugError::post(), setupPlane(), SbPlane::transform(), SbProjector::verifyProjection(), SbProjector::viewVol, SbProjector::workingToWorld, and SbProjector::worldToWorking.
Referenced by SoVRMLPlaneSensor::drag(), SoRotateDiscDragger::drag(), SoScale2Dragger::drag(), SoTranslate2Dragger::drag(), SoSpotLightDragger::drag(), SoTabPlaneDragger::drag(), SoHandleBoxDragger::drag(), getVector(), and setStartPosition().
void SbPlaneProjector::setPlane | ( | const SbPlane & | planeref | ) |
Set a new projection plane.
References needSetup, nonOrientPlane, and plane.
Referenced by SoVRMLPlaneSensor::dragStart(), SoScale2Dragger::dragStart(), SoRotateDiscDragger::dragStart(), SoTranslate2Dragger::dragStart(), SoSpotLightDragger::dragStart(), SoTabPlaneDragger::dragStart(), SoHandleBoxDragger::dragStart(), and SoTransformerDragger::dragStart().
const SbPlane & SbPlaneProjector::getPlane | ( | void | ) | const |
Returns the current projection plane.
References plane.
void SbPlaneProjector::setOrientToEye | ( | const SbBool | orienttoeye | ) |
Sets whether or not the plane should always be oriented towards the "eye" of the viewer.
References needSetup, and orientToEye.
SbBool SbPlaneProjector::isOrientToEye | ( | void | ) | const |
Returns the state of the plane orientation flag.
References orientToEye.
void SbPlaneProjector::setStartPosition | ( | const SbVec2f & | viewpos | ) |
Explicitly set position of initial projection, so we get correct values for later calls to getVector() etc.
void SbPlaneProjector::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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protected |
Should be called whenever SbPlaneProjector::needSetup is TRUE
. Will recalculate projection plane.
References SbPlane::getDistanceFromOrigin(), SbPlane::getNormal(), SbViewVolume::getProjectionDirection(), SbMatrix::multDirMatrix(), needSetup, nonOrientPlane, orientToEye, plane, SbProjector::viewVol, and SbProjector::worldToWorking.
Referenced by project().
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The projection plane.
Referenced by getPlane(), project(), setPlane(), and setupPlane().
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The "original" plane which was set (as opposed to the recalculated projection plane according to the SbPlaneProjector::orientToEye setting).
Referenced by setPlane(), and setupPlane().
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Which direction the plane is oriented.
Referenced by isOrientToEye(), setOrientToEye(), and setupPlane().
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Set to TRUE
whenever the plane needs to be recalculated according to the setting of the SbPlaneProjector::orientToEye flag.
Referenced by project(), setOrientToEye(), setPlane(), and setupPlane().
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Stores the previously projected 3D point.
Referenced by getVector(), and setStartPosition().
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