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SbLineProjector Class Reference

The SbLineProjector class projects 2D points to 3D points along a line. More...

#include <Inventor/projectors/SbLineProjector.h>

Inheritance diagram for SbLineProjector::

List of all members.

Public Methods
	SbLineProjector (void)
virtual SbProjector *	copy (void) const
virtual SbVec3f	project (const SbVec2f &point)
void	setLine (const SbLine &line)
const SbLine &	getLine (void) const
virtual SbVec3f	getVector (const SbVec2f &viewpos1, const SbVec2f &viewpos2)
virtual SbVec3f	getVector (const SbVec2f &viewpos)
void	setStartPosition (const SbVec2f &viewpos)
void	setStartPosition (const SbVec3f &point)
Protected Attributes
SbLine	line
SbVec3f	lastPoint

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Detailed Description

The SbLineProjector class projects 2D points to 3D points along a line.

The 3D projection of the 2D coordinates is for this projector class constrained to lie along a pre-defined line.

Among other places, this is useful within the translation draggers, like for instance SoTranslate1Dragger, where we want to move "pieces" along one or more axes.

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Constructor & Destructor Documentation

SbLineProjector::SbLineProjector (  void )

Constructor. Intializes the projector instance to use a line from <0, 0, 0> to <0, 1, 0>.

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Member Function Documentation

SbProjector * SbLineProjector::copy (  void )  const [virtual]

Construct and return a copy of this projector. The caller is responsible for destructing the new instance. Reimplemented from SbProjector.

SbVec3f SbLineProjector::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. Reimplemented from SbProjector.

void SbLineProjector::setLine (  const SbLine & line )

Set a new projection line. 3D points will be mapped to be on this line.

const SbLine & SbLineProjector::getLine (  void )  const

Returns the currently set projection line.

SbVec3f SbLineProjector::getVector (  const SbVec2f & viewpos1, const SbVec2f & viewpos2 )  [virtual]

Calculates and returns a vector between the projected 3D position of viewpos1 and viewpos2.

SbVec3f SbLineProjector::getVector (  const SbVec2f & viewpos )  [virtual]

Returns the 3D vector between the last projection and the one calculated for viewpos.

void SbLineProjector::setStartPosition (  const SbVec2f & viewpos )

Explicitly set position of initial projection, so we get correct values for later calls to getVector() etc.

void SbLineProjector::setStartPosition (  const SbVec3f & point )

Explicitly set position of initial projection, so we get correct values for later calls to getVector() etc.

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Member Data Documentation

SbLineProjector::line [protected]

The projection line. Projected 3D points will be constrained to be on this line.

SbLineProjector::lastPoint [protected]

The last projected point.

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

• SbLineProjector.cpp
• SbLineProjector.h

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