# SbSphereSectionProjector Class Reference
[Projector classes (mostly for internal use)]

`#include <Inventor/projectors/SbSphereSectionProjector.h>`

Inheritance diagram for SbSphereSectionProjector:

List of all members.

## 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

## 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)

## Protected Member Functions

virtual void | setupTolerance (void)

## Protected Attributes

float | tolerance
float | tolDist
float | radialFactor
SbVec3f | planePoint
SbVec3f | planeDir
float | planeDist
SbPlane | tolPlane

## 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 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.

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 re-orients 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

SbSphereSectionProjector::tolerance `[protected]`

| Tolerance value, deciding how much of the half-sphere to do projections against.

SbSphereSectionProjector::tolDist `[protected]`

| Tolerance value multiplied with the sphere radius.

SbSphereSectionProjector::radialFactor `[protected]`

The radialfactor value decides how to calculate rotations outside of the sphere.

See also:
  setRadialFactor()

SbSphereSectionProjector::planePoint `[protected]`

| A point in the plane where the center of the sphere is.

SbSphereSectionProjector::planeDir `[protected]`

| Direction of cutting plane.

SbSphereSectionProjector::planeDist `[protected]`

| Distance from plane to sphere center.

SbSphereSectionProjector::tolPlane `[protected]`

| Defines the plane cutting the sphere into a projection part.

The documentation for this class was generated from the following files:

- SbSphereSectionProjector.h
- SbSphereSectionProjector.cpp