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SbSphereProjector

NAME

SbSphereProjector -

SYNOPSIS

#include <Inventor/projectors/SbSphereProjector.h>

Inherits SbProjector.

Inherited by SbSphereSectionProjector, and SbSphereSheetProjector.

Detailed Description

The SbSphereProjector class is the abstract base class for mapping to spherical surfaces.

The sphere projectors map 2D points to various surface types based on spherical shapes.

See also:

SbCylinderProjector

Public Member Functions

SbVec3f projectAndGetRotation (const SbVec2f &point, SbRotation &rot)

virtual SbRotation getRotation (const SbVec3f &point1, const SbVec3f &point2)=0

void setSphere (const SbSphere &sph)

const SbSphere & getSphere (void) const

void setOrientToEye (const SbBool orienttoeye)

SbBool isOrientToEye (void) const

void setFront (const SbBool infront)

SbBool isFront (void) const

SbBool isPointInFront (const SbVec3f &point) const

virtual void setWorkingSpace (const SbMatrix &space)

Protected Member Functions

SbSphereProjector (const SbBool orienttoeye)

SbSphereProjector (const SbSphere &s, const SbBool orienttoeye)

SbBool intersectSphereFront (const SbLine &l, SbVec3f &result)

Protected Attributes

SbBool intersectFront

SbSphere sphere

SbBool orientToEye

SbBool needSetup

SbVec3f lastPoint

Constructor & Destructor Documentation

SbSphereProjector::SbSphereProjector (const SbBool orienttoeye) [protected]

Default constructor sets up a sphere at the origin with radius 1.

SbSphereProjector::SbSphereProjector (const SbSphere & s, const SbBool orienttoeye) [protected]

Constructor taking an explicit sphere projection definition.

Member Function Documentation

SbVec3f SbSphereProjector::projectAndGetRotation (const SbVec2f & point, SbRotation & rot)

Project the 2D point to a 3D coordinate on the spherical surface, and find the rotation from the last projection to this one.

See also:

project(), getRotation()

References getRotation(), lastPoint, and SbProjector::project().

SbRotation SbSphereProjector::getRotation (const SbVec3f & point1, const SbVec3f & point2) [pure virtual]

Returns rotation on the projection surface which re-orients point1 to point2.

Implemented in SbSpherePlaneProjector, SbSphereSectionProjector, and SbSphereSheetProjector.

Referenced by projectAndGetRotation().

void SbSphereProjector::setSphere (const SbSphere & sph)

Set sphere to project onto.

References needSetup, and sphere.

const SbSphere & SbSphereProjector::getSphere (void) const

Returns projection sphere.

References sphere.

void SbSphereProjector::setOrientToEye (const SbBool orienttoeye)

Sets whether or not the projection surface should be oriented towards the eye of the viewer. Default is TRUE.

References needSetup, and orientToEye.

SbBool SbSphereProjector::isOrientToEye (void) const

Returns the state of the sphere orientation flag.

References orientToEye.

Referenced by SbSphereSheetProjector::project().

void SbSphereProjector::setFront (const SbBool infront)

Set whether to intersect with the outside of the sphere (infront equal to TRUE), or the inside.

References intersectFront, and needSetup.

SbBool SbSphereProjector::isFront (void) const

Returns value of the flag which decides whether to intersect with the outside or inside of the sphere.

References intersectFront.

Referenced by intersectSphereFront().

SbBool SbSphereProjector::isPointInFront (const SbVec3f & point) const

Check if point is on the frontside or the backside of the cylinder.

References SbVec3f::dot(), SbSphere::getCenter(), SbViewVolume::getProjectionPoint(), SbViewVolume::getProjectionType(), SbProjector::getViewVolume(), SbMatrix::multDirMatrix(), SbMatrix::multVecMatrix(), SbViewVolume::PERSPECTIVE, sphere, SbProjector::worldToWorking, and SbViewVolume::zVector().

void SbSphereProjector::setWorkingSpace (const SbMatrix & space) [virtual]

Sets the matrix used for converting from the projector's coordinate system to the world coordinate system.

Reimplemented from SbProjector.

References needSetup, and SbProjector::setWorkingSpace().

SbBool SbSphereProjector::intersectSphereFront (const SbLine & l, SbVec3f & result) [protected]

Intersect line with the SbSphereProjector::sphere and place the intersection point (if any) in result. Considers setFront() settings.

Returns TRUE if line actually hits the sphere, FALSE if it doesn't intersect with it.

References SbSphere::intersect(), isFront(), and sphere.

Referenced by SbSphereSheetProjector::project(), SbSphereSectionProjector::project(), and SbSpherePlaneProjector::project().

Member Data Documentation

SbSphereProjector::intersectFront [protected]

Flag which says whether or not we should map to the outside or inside of the sphere surface.

Referenced by isFront(), SbSphereSheetProjector::project(), setFront(), SbSphereSheetProjector::setupPlane(), and SbSphereSectionProjector::setupTolerance().

SbSphereProjector::sphere [protected]

Projection sphere.

Referenced by SbSphereSectionProjector::getRotation(), SbSpherePlaneProjector::getRotation(), getSphere(), intersectSphereFront(), isPointInFront(), SbSphereSheetProjector::project(), SbSphereSectionProjector::project(), setSphere(), SbSphereSheetProjector::setupPlane(), and SbSphereSectionProjector::setupTolerance().

SbSphereProjector::orientToEye [protected]

Which direction the spherical surface is oriented.

Referenced by isOrientToEye(), setOrientToEye(), SbSphereSheetProjector::setupPlane(), and SbSphereSectionProjector::setupTolerance().

SbSphereProjector::needSetup [protected]

Set to TRUE whenever the projection surface needs to be recalculated according to the setting of the SbSphereProjector::orientToEye flag.

Referenced by SbSphereSheetProjector::getRotation(), SbSphereSectionProjector::isWithinTolerance(), SbSphereSheetProjector::project(), SbSphereSectionProjector::project(), SbSpherePlaneProjector::project(), setFront(), setOrientToEye(), setSphere(), SbSphereSectionProjector::setTolerance(), SbSphereSheetProjector::setupPlane(), SbSphereSectionProjector::setupTolerance(), and setWorkingSpace().

SbSphereProjector::lastPoint [protected]

Stores the previously projected 3D point.

Referenced by SbSphereSheetProjector::project(), SbSphereSectionProjector::project(), SbSpherePlaneProjector::project(), and projectAndGetRotation().

Author

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