NAME
SbSphereSectionProjector -
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.
SYNOPSIS
#include <Inventor/projectors/SbSphereSectionProjector.h>
Inherits SbSphereProjector.
Inherited by SbSpherePlaneProjector.
Public Member Functions
SbSphereSectionProjector (const float edgetol=0.9f, const SbBool
orienttoeye=1)
SbSphereSectionProjector (const SbSphere &sph, const float
edgetol=0.9f, const SbBool orienttoeye=1)
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
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 = 1) 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 = 1) 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.
Author
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