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Sphere-section projector. More...
#include <Inventor/projectors/SbSphereSectionProjector.h>
Public Member Functions | |
SbSphereSectionProjector (float edgeTol=.9, bool orientToEye=TRUE) | |
Default constructor. More... | |
SbSphereSectionProjector (const SbSphere &sph, float edgeTol=.9, bool orientToEye=TRUE) | |
Constructor taking the sphere. More... | |
~SbSphereSectionProjector () | |
Destructor. More... | |
virtual SbProjector * | copy () const |
Returns an instance that is a copy of this instance. More... | |
virtual SbVec3f | project (const SbVec2f &point) |
Apply the projector using the given point, returning the point in three dimensions that it projects to. More... | |
virtual SbRotation | getRotation (const SbVec3f &point1, const SbVec3f &point2) |
Computes a rotation based on two points on this projector. More... | |
void | setTolerance (float edgeTol) |
float | getTolerance () const |
Set and get the edge tolerance as a fraction of the radius of the sphere. More... | |
void | setRadialFactor (float rad=0.0) |
float | getRadialFactor () const |
Set and get the radial rotation factor. More... | |
bool | isWithinTolerance (const SbVec3f &point) |
Find whether this point on the sphere or tolerance plane is within tolerance. More... | |
Public Member Functions inherited from SbSphereProjector | |
SbVec3f | projectAndGetRotation (const SbVec2f &point, SbRotation &rot) |
Apply the projector using the given point, returning the point in three dimensions that it projects to. More... | |
void | setSphere (const SbSphere &sph) |
Set and get the sphere on which to project points. More... | |
const SbSphere & | getSphere () const |
Set and get the sphere on which to project points. More... | |
void | setOrientToEye (bool orientToEye) |
Set and get whether the projector should always be oriented towards the eye. More... | |
bool | isOrientToEye () const |
Set and get whether the projector should always be oriented towards the eye. More... | |
void | setFront (bool inFront) |
Set whether the projector should intersect the half of the sphere that faces the eye. More... | |
bool | isFront () const |
Get whether the projector should intersect the half of the sphere that faces the eye. More... | |
bool | isPointInFront (const SbVec3f &point) const |
Get whether the projector should intersect the half of the sphere that faces the eye. More... | |
virtual void | setWorkingSpace (const SbMatrix &space) |
Set the transform space to work in. More... | |
~SbSphereProjector () | |
Destructor. More... | |
Public Member Functions inherited from SbProjector | |
virtual void | setViewVolume (const SbViewVolume &vol) |
Set the view volume to use for the projection. More... | |
const SbViewVolume & | getViewVolume () const |
Get the view volume to use for the projection. More... | |
const SbMatrix & | getWorkingSpace () const |
Get the transform space to work in. More... | |
Protected Member Functions | |
virtual void | setupTolerance () |
Sets up the tolerance slice. More... | |
Protected Member Functions inherited from SbSphereProjector | |
SbSphereProjector (bool orientToEye) | |
Constructors The default sphere to use has a radius of 1.0 and is centered at (0,0,0). More... | |
SbSphereProjector (const SbSphere &s, bool orientToEye) | |
Protected Member Functions inherited from SbProjector | |
SbProjector () | |
Default constructor. More... | |
virtual | ~SbProjector () |
SbLine | getWorkingLine (const SbVec2f &point) const |
Given this mouse point, return the line it projects to in working space. More... | |
Protected Attributes | |
float | tolerance |
Information about the slice tolerance. More... | |
float | tolDist |
dist from planePoint to tolerance slice More... | |
float | radialFactor |
SbVec3f | planePoint |
Information about the plane used for intersection testing. More... | |
SbVec3f | planeDir |
normal direction More... | |
float | planeDist |
distance from sphere center More... | |
SbPlane | tolPlane |
the plane itself More... | |
Protected Attributes inherited from SbSphereProjector | |
bool | intersectFront |
Are intersections done on the front half (if not, they're done on the back half) of the sphere? More... | |
SbSphere | sphere |
The sphere being used. More... | |
bool | orientToEye |
TRUE if always oriented to eye. More... | |
bool | needSetup |
Set TRUE whenever sphere, work space or orientation changes. More... | |
SbVec3f | lastPoint |
cached last point on this projector More... | |
Protected Attributes inherited from SbProjector | |
SbViewVolume | viewVol |
SbMatrix | worldToWorking |
SbMatrix | workingToWorld |
SbSphereSectionProjector 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.
Definition at line 95 of file SbSphereSectionProjector.h.
SbSphereSectionProjector::SbSphereSectionProjector | ( | float | edgeTol = .9 , |
bool | orientToEye = TRUE |
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The default view volume is undefined. The default working space is identity (world space). The default sphere to use has a radius of 1.0 and is centered at (0,0,0). The default edge tolerance is .9. The default eye orientation is TRUE.
SbSphereSectionProjector::SbSphereSectionProjector | ( | const SbSphere & | sph, |
float | edgeTol = .9 , |
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bool | orientToEye = TRUE |
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Definition at line 113 of file SbSphereSectionProjector.h.
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The caller is responsible for deleting the copy when done.
Implements SbProjector.
Reimplemented in SbSpherePlaneProjector.
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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
Definition at line 153 of file SbSphereSectionProjector.h.
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Implements SbSphereProjector.
Reimplemented in SbSpherePlaneProjector.
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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.
Definition at line 135 of file SbSphereSectionProjector.h.
bool SbSphereSectionProjector::isWithinTolerance | ( | const SbVec3f & | point | ) |
The point should be normalized from 0-1, with (0,0) at the lower-left.
Implements SbSphereProjector.
Reimplemented in SbSpherePlaneProjector.
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Definition at line 138 of file SbSphereSectionProjector.h.
void SbSphereSectionProjector::setTolerance | ( | float | edgeTol | ) |
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Definition at line 172 of file SbSphereSectionProjector.h.
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Definition at line 173 of file SbSphereSectionProjector.h.
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point on plane
Definition at line 171 of file SbSphereSectionProjector.h.
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Definition at line 168 of file SbSphereSectionProjector.h.
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Definition at line 166 of file SbSphereSectionProjector.h.
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the edge tolerance
Definition at line 165 of file SbSphereSectionProjector.h.
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Definition at line 174 of file SbSphereSectionProjector.h.