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Man Pages


Manual Reference Pages  -  SBCYLINDERSECTIONPROJECTOR (3)

NAME

SbCylinderSectionProjector — cylinder-section projector

CONTENTS

Inherits From
Synopsis
Description
Methods
File Format/defaults
See Also

INHERITS FROM

SbProjector > SbCylinderProjector > SbCylinderSectionProjector

SYNOPSIS

#include <Inventor/projectors/SbCylinderSectionProjector.h>

Methods from class SbCylinderSectionProjector:

       
                    
                     SbCylinderSectionProjector(float edgeTol = .9, SbBool orientToEye = TRUE)    
   
                    
                     SbCylinderSectionProjector(const SbCylinder &cyl, float edgeTol = .9, SbBool orientToEye = TRUE)    
   
                    
                     ~SbCylinderSectionProjector()    
void    
                    
void                 setTolerance(float edgeTol)    
float    
                    
float                getTolerance() const    
SbBool    
                    
SbBool               isWithinTolerance(const SbVec3f &point)

Methods from class SbCylinderProjector:

    SbVec3f    
                    
SbVec3f              projectAndGetRotation(const SbVec2f &point, SbRotation &rot)    
virtual SbRotation    
                    
virtual SbRotation   getRotation(const SbVec3f &point1, const SbVec3f &point2)    
void    
                    
void                 setCylinder(const SbCylinder &cyl)    
const SbCylinder &    
                    
const SbCylinder &   getCylinder() const    
void    
                    
void                 setOrientToEye(SbBool orientToEye)    
SbBool    
                    
SbBool               isOrientToEye() const    
void    
                    
void                 setFront(SbBool isFront)    
SbBool    
                    
SbBool               isFront() const    
SbBool    
                    
SbBool               isPointInFront(const SbVec3f &point) const

Methods from class SbProjector:

    virtual SbVec3f    
                       
virtual SbVec3f         project(const SbVec2f &point)    
virtual void    
                       
virtual void            setViewVolume(const SbViewVolume &vol)    
const SbViewVolume &    
                       
const SbViewVolume &    getViewVolume() const    
virtual void    
                       
virtual void            setWorkingSpace(const SbMatrix &space)    
const SbMatrix &    
                       
const SbMatrix &        getWorkingSpace() const    
virtual SbProjector *    
                       
virtual SbProjector *   copy() const

DESCRIPTION

SbCylinderSectionProjector projects a window space point (usually based on the mouse location) onto the section of a cylinder that has been sliced by a plane. Two projected points can produce a rotation along the cylinder’s axis. The tolerance slice can be specified as a fraction of the radius of the cylinder. The projection point will not extend beyond the sliced portion of the cylinder.

Incremental changes (delta rotation) can be computed during interactive sessions. Cylinder projectors are typically used to write interactive 3D manipulators and viewers.

METHODS

       
                    
                     SbCylinderSectionProjector(float edgeTol = .9, SbBool orientToEye = TRUE)    
   
                    
                     SbCylinderSectionProjector(const SbCylinder &cyl, float edgeTol = .9, SbBool orientToEye = TRUE)
Constructors. The first uses a default cylinder aligned with the Y axis with radius 1.0; the cylinder is supplied in the second. The position of the plane which slices the cylinder into a section is specified as a fraction of the cylinder radius with the parameter edgeTol. A tolerance value of 1.0 positions the plane down the center of the cylinder. A tolerance value of 0.5 defines the longitudinal plane halfway between the center and the outside edge of the cylinder. The default value is .9, so that almost half the cylinder is in front of the plane. The orientToEye parameter determines whether the plane is perpendicular to the eye, or perpendicular to the cylinder’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.

       
                    
                     ~SbCylinderSectionProjector()
Destructor.

    void    
                    
void                 setTolerance(float edgeTol)    
float    
                    
float                getTolerance() const
Set and get the edge tolerance as a fraction of the radius of the cylinder. If this is 1.0, the projector is a half cylinder. If this is .1, the projector is a slice of the cylinder with radius .1*radius. Default is .9.

    SbBool    
                    
SbBool               isWithinTolerance(const SbVec3f &point)
Find whether this point on the cylinder or tolerance plane is within tolerance.

FILE FORMAT/DEFAULTS

SEE ALSO

SbCylinderPlaneProjector, SbCylinderSheetProjector, SbLineProjector, SbPlaneProjector, SbSpherePlaneProjector, SbSphereProjector, SbSphereSectionProjector, SbSphereSheetProjector

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