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/*
*
* Copyright (C) 2000 Silicon Graphics, Inc. All Rights Reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* Further, this software is distributed without any warranty that it is
* free of the rightful claim of any third person regarding infringement
* or the like. Any license provided herein, whether implied or
* otherwise, applies only to this software file. Patent licenses, if
* any, provided herein do not apply to combinations of this program with
* other software, or any other product whatsoever.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
* Mountain View, CA 94043, or:
*
* http://www.sgi.com
*
* For further information regarding this notice, see:
*
* http://oss.sgi.com/projects/GenInfo/NoticeExplan/
*
*/
// -*- C++ -*-
/*
* Copyright (C) 1990,91,92 Silicon Graphics, Inc.
*
_______________________________________________________________________
______________ S I L I C O N G R A P H I C S I N C . ____________
|
| $Revision: 1.1.1.1 $
|
| Description:
| This file contains the definition of the SbLineProjector
| class. This projects the mouse onto a line.
|
| Author(s) : Howard Look, Paul Isaacs
|
______________ S I L I C O N G R A P H I C S I N C . ____________
_______________________________________________________________________
*/
#ifndef _SB_LINE_PROJECTOR_
#define _SB_LINE_PROJECTOR_
#include <Inventor/projectors/SbProjector.h>
// C-api: prefix=SbLineProj
class SbLineProjector : public SbProjector
{
public:
// Constructor
// The default line passes through the origin and is
// oriented toward the Y axis.
SbLineProjector();
// Destructor
~SbLineProjector(){};
// Returns an instance that is a copy of this instance. The caller
// is responsible for deleting the copy when done.
virtual SbProjector * copy() const;
// Apply the projector using the given point, returning the
// point in three dimensions that it projects to.
// The point should be normalized from 0-1, with (0,0) at the lower-left.
virtual SbVec3f project(const SbVec2f &point);
// Set/get the line to use.
void setLine(const SbLine &line);
const SbLine & getLine() const { return line; }
// Get a vector on this line given two normalized mouse points.
// C-api: expose
// C-api: name=getVecMouse2
virtual SbVec3f getVector(const SbVec2f &mousePosition1,
const SbVec2f &mousePosition2);
// Get a vector given the current mouse point.
// Uses the last point on this projector from the previous
// call to getVector or setStartPostion. Do not use this
// if the working space transform is changing since
// the new point will be in a different space than
// the old one.
// C-api: expose
// C-api: name=getVecMouse1
virtual SbVec3f getVector(const SbVec2f &mousePosition);
// Set the initialial from a mouse position.
// C-api: name=setStartPosMouse
void setStartPosition(const SbVec2f &mousePosition)
{ lastPoint = project(mousePosition); }
// Set the initialial position from a point on the projector.
// C-api: name=setStartPosPt
void setStartPosition(const SbVec3f &point)
{ lastPoint = point; }
protected:
SbLine line;
SbVec3f lastPoint;
};
#endif /* _SB_LINE_PROJECTOR_ */
|
