SbSphereSectionProjector(3)

NAME
SbSphereSectionProjector - The SbSphereSectionProjector projects 2D points to a sliced sphere.

SYNOPSIS

#include <Inventor/projectors/SbSphereSectionProjector.h>

Inherits SbSphereProjector.

Inherited by SbSpherePlaneProjector.

  Public Member Functions
SbSphereSectionProjector (const float edgetol=0.9f, const SbBool orienttoeye=TRUE)
SbSphereSectionProjector (const SbSphere &sph, const float edgetol=0.9f, const SbBool orienttoeye=TRUE)
virtual SbProjector * copy (void) const
virtual SbVec3f project (const SbVec2f &point)
virtual SbRotation getRotation (const SbVec3f &point1, const SbVec3f &point2)
void setTolerance (const float edgetol)
float getTolerance (void) const
void setRadialFactor (const float rad=0.0f)
float getRadialFactor (void) const
SbBool isWithinTolerance (const SbVec3f &point)
Public Member Functions inherited from SbSphereProjector
SbVec3f projectAndGetRotation (const SbVec2f &point, SbRotation &rot)
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)
Public Member Functions inherited from SbProjector
virtual void setViewVolume (const SbViewVolume &vol)
const SbViewVolume & getViewVolume (void) const
const SbMatrix & getWorkingSpace (void) const
virtual SbBool tryProject (const SbVec2f &point, const float epsilon, SbVec3f &result)

  Protected Member Functions
virtual void setupTolerance (void)
Protected Member Functions inherited from SbSphereProjector
SbSphereProjector (const SbBool orienttoeye)
SbSphereProjector (const SbSphere &s, const SbBool orienttoeye)
SbBool intersectSphereFront (const SbLine &l, SbVec3f &result)
Protected Member Functions inherited from SbProjector
SbProjector (void)
virtual ~SbProjector ()
SbLine getWorkingLine (const SbVec2f &point) const
float findVanishingDistance (void) const
SbBool verifyProjection (const SbVec3f &projpt) const

  Protected Attributes
float tolerance
float tolDist
float radialFactor
SbVec3f planePoint
SbVec3f planeDir
float planeDist
SbPlane tolPlane
Protected Attributes inherited from SbSphereProjector
SbBool intersectFront
SbSphere sphere
SbBool orientToEye
SbBool needSetup
SbVec3f lastPoint
Protected Attributes inherited from SbProjector
SbViewVolume viewVol
SbMatrix worldToWorking
SbMatrix workingToWorld

Detailed Description

The SbSphereSectionProjector projects 2D points to a sliced sphere. The projection sphere for this class is sliced by a clipping plane. Projections will be mapped to the remaining sphere part.

See also
    SbCylinderSectionProjector

Constructor & Destructor Documentation

  SbSphereSectionProjector::SbSphereSectionProjector (const float edgetol = 0.9f, const SbBool orienttoeye = TRUE)
Default constructor. See SbSphereProjector::SbSphereProjector().

The edgetol value should be within <0, 1], and specifies how much of the sphere is used as a projection surface. 1.0 means the full front half is used.

  SbSphereSectionProjector::SbSphereSectionProjector (const SbSphere & sph, const float edgetol = 0.9f, const SbBool orienttoeye = TRUE)
Constructor with explicit setting of the projection sphere.

Member Function Documentation

  SbProjector * SbSphereSectionProjector::copy (void ) const [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 are 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.

Reimplemented in SbSpherePlaneProjector.

  SbVec3f SbSphereSectionProjector::project (const SbVec2f & point) [virtual]
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.

Reimplemented in SbSpherePlaneProjector.

  SbRotation SbSphereSectionProjector::getRotation (const SbVec3f & point1, const SbVec3f & point2) [virtual]
Returns rotation on the projection surface which reorients point1 to point2.

Implements SbSphereProjector.

Reimplemented in SbSpherePlaneProjector.

  void SbSphereSectionProjector::setTolerance (const float edgetol)
The edgetol value decides how much of the surface of the sphere is used for projection. 1.0 means the full sphere half is used.

  float SbSphereSectionProjector::getTolerance (void ) const
Returns edge tolerance for the sphere half.

  void SbSphereSectionProjector::setRadialFactor (const float rad = 0.0f)
Set up the controlling value for how the rotation calculation will be done "outside" the sphere.

A radialFactor equal to 0.0 will make the rotations be done like if they were done by dragging the sphere, while a value of 1.0 will make the rotation be around the axis from the viewpoint towards the sphere.

  float SbSphereSectionProjector::getRadialFactor (void ) const
Returns value of radialFactor.

See also
    setRadialFactor()

  SbBool SbSphereSectionProjector::isWithinTolerance (const SbVec3f & point)
Check if point is within the part of the sphere used for projections.

  void SbSphereSectionProjector::setupTolerance (void ) [protected], [virtual]
Recalculate the internal projection surface settings. Needs to be done if any of the parameters influencing the projection surface have been changed from subclasses without using the access methods.

Member Data Documentation

  float SbSphereSectionProjector::tolerance [protected]
Tolerance value, deciding how much of the half-sphere to do projections against.

  float SbSphereSectionProjector::tolDist [protected]
Tolerance value multiplied with the sphere radius.

  float SbSphereSectionProjector::radialFactor [protected]
The radial factor value decides how to calculate rotations outside of the sphere.

See also
    setRadialFactor()

  SbVec3f SbSphereSectionProjector::planePoint [protected]
A point in the plane where the center of the sphere is located.

  SbVec3f SbSphereSectionProjector::planeDir [protected]
Direction of cutting plane.

  float SbSphereSectionProjector::planeDist [protected]
Distance from plane to sphere center.

  SbPlane SbSphereSectionProjector::tolPlane [protected]
Defines the plane cutting the sphere into a projection part.

Author

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