SbSphereSectionProjector(3IV)NAMESbSphereSectionProjector (SbSphSectProj) - sphere-section projector
INHERITS FROM
SbProjector > SbSphereProjector > SbSphereSectionProjectorSYNOPSIS
#include <Inventor_c/projectors/SbSphereSectionProjector.h>
typedef SbSphereSectionProjector
SbSphSectProj
Functions from class SbSphereSectionProjector:
SbSphereSectionProjector * SbSphSectProjCreate(float edgeTol = .9,
SbBool orientToEye = TRUE)
SbSphereSectionProjector * SbSphSectProjCreateSph(const SbSphere *sph,
float edgeTol = .9, SbBool orientToEye =
TRUE)
void SbSphSectProjDelete(SbSphSectProj *this)
void SbSphSectProjSetTol(SbSphSectProj *this,
float edgeTol)
float SbSphSectProjGetTol(const SbSphSectProj
*this)
void SbSphSectProjSetRadialFactor(SbSphSectProj
*this, float radialFactor = 0.0)
float SbSphSectProjGetRadialFactor(const
SbSphSectProj *this)
SbBool SbSphSectProjIsWithinTol(SbSphSectProj *this,
const SbVec3f *point)
Functions from class SbSphereProjector:
SbVec3f SbSphSectProjProjectGetRot(SbSphSectProj *this, const
SbVec2f *point, SbRotation *rot)
SbRotation SbSphSectProjGetRot(SbSphSectProj *this, const
SbVec3f *point1, const SbVec3f *point2)
void SbSphSectProjSetSph(SbSphSectProj *this, const
SbSphere *sph)
const SbSphere * SbSphSectProjGetSph(const SbSphSectProj *this)
void SbSphSectProjSetOrientToEye(SbSphSectProj *this,
SbBool orientToEye)
SbBool SbSphSectProjIsOrientToEye(const SbSphSectProj *this)
void SbSphSectProjSetFront(SbSphSectProj *this, SbBool
isFront)
SbBool SbSphSectProjIsFront(const SbSphSectProj *this)
SbBool SbSphSectProjIsPointInFront(const SbSphSectProj
*this, const SbVec3f *point)
Functions from class SbProjector:
Page 1SbSphereSectionProjector(3IV)
SbVec3f SbSphSectProjProject(SbSphSectProj *this, const
SbVec2f *point)
void SbSphSectProjSetViewVol(SbSphSectProj *this, const
SbViewVolume *vol)
const SbViewVolume * SbSphSectProjGetViewVol(const SbSphSectProj *this)
void SbSphSectProjSetWorkSpace(SbSphSectProj *this,
const SbMatrix *space)
const SbMatrix * SbSphSectProjGetWorkSpace(const SbSphSectProj
*this)
SbProjector * SbSphSectProjCopy(const SbSphSectProj *this)
DESCRIPTIONSbSphereSectionProjector projects a window space point (usually based on
the mouse location) onto the section of a sphere that has been sliced by
a plane. Two projected points can produce a rotation about the sphere's
center. The tolerance slice can be specified as a fraction of the radius
of the sphere. The projection point will not extend beyond the sliced
portion of the sphere.
Incremental changes (delta rotation) can be computed during interactive
sessions. Sphere projectors are typically used to write interactive 3D
manipulators and viewers.
FUNCTIONSSbSphereSectionProjector * SbSphSectProjCreate(float edgeTol = .9,
SbBool orientToEye = TRUE)
SbSphereSectionProjector * SbSphSectProjCreateSph(const SbSphere *sph,
float edgeTol = .9, SbBool orientToEye =
TRUE)
Constructors. The first uses a default sphere centered at the origin
with radius 1.0; the sphere is supplied in the second. The position
of the plane which slices the sphere into a section is specified as
a fraction of the sphere radius with the parameter edgeTol. A
tolerance value of 1.0 positions the plane down the center of the
sphere. A tolerance value of 0.5 defines the longitudinal plane
halfway between the center and the outside edge of the sphere. The
default value is .9, so that almost half the sphere is in front of
the plane. The orientToEye parameter determines whether the plane is
perpendicular to the eye, or perpendicular to the sphere's Z axis.
Setting that parameter to TRUE (the default) specifies that the
plane be perpendicular to the eye, which is most often the desired
behavior.
The default view volume is undefined, and the working space is
identity.
void SbSphSectProjDelete(SbSphSectProj *this)
Destructor.
void SbSphSectProjSetTol(SbSphSectProj *this,
float edgeTol)
Page 2SbSphereSectionProjector(3IV)
float SbSphSectProjGetTol(const SbSphSectProj
*this)
Set and get the edge tolerance as a fraction of the radius of the
sphere. If this is 1.0, the projector is a hemisphere. If this is
.1, the projector is a slice of the sphere with radius .1*radius.
Default is .9.
void SbSphSectProjSetRadialFactor(SbSphSectProj
*this, float radialFactor = 0.0)
float SbSphSectProjGetRadialFactor(const
SbSphSectProj *this)
Set and get the radial rotation factor. When the mouse is dragged
off the edge of the sphere, the mouse motion can be classified as
either tangential (moving in a circle around the sphere) or radial
(moving toward or away from the center). The tangential motion will
always map to a rotation around the center, (like the hands of a
clock). The radial motion, by default, has no effect. But if you set
the radialFactor to be > 0.0, this motion will make the sphere
rotate as if the mouse is pulling the top of the sphere out toward
the mouse. If radialFactor = 1.0, then pulling has a `normal' feel
(that is, the mouse motion causes the same amount of rotation as if
you had rotated by hitting the actual surface of the sphere).
Default is 0.0
SbBool SbSphSectProjIsWithinTol(SbSphSectProj *this,
const SbVec3f *point)
Find whether this point on the sphere or tolerance plane is within
tolerance.
FILE FORMAT/DEFAULTS
SphereSectionProjector {
}
SEE ALSO
SbCylinderProjector, SbCylinderSectionProjector,
SbCylinderPlaneProjector, SbCylinderSheetProjector, SbLineProjector,
SbPlaneProjector, SbSpherePlaneProjector, SbSphereSheetProjector
Page 3
