FGFS-4.1/OpenSceneGraph
4
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Added convinience constructors to help support picking with the new osgUtil::Intersector classes.

Browse Source
This commit is contained in:
Robert Osfield
2006-11-02 17:05:46 +00:00
parent 7d12b85632
commit 06cca16a2a
3 changed files with 92 additions and 39 deletions
Download Patch File Download Diff File Expand all files Collapse all files

40
examples/osgkeyboardmouse/osgkeyboardmouse.cpp
View File

@@ -191,29 +191,25 @@ public:
bool usePolytopePicking = true;
if (usePolytopePicking)
{
#if 0
// use window coordinates
// remap the mouse x,y into viewport coordinates.
osg::Viewport* viewport = viewer->getCamera()->getViewport();
float mx = viewport->x() + (int)((float)viewport->width()*(ea.getXnormalized()*0.5f+0.5f));
float my = viewport->y() + (int)((float)viewport->height()*(ea.getYnormalized()*0.5f+0.5f));
float width = 10.0f;
float height = 10.0f;
float min_x = mx - width*0.5;
float max_x = mx + width*0.5;
float min_y = my - height*0.5;
float max_y = my + height*0.5;
osg::Polytope polytope;
polytope.add(osg::Plane(1,0,0,-min_x));
polytope.add(osg::Plane(-1,0,0,max_x));
polytope.add(osg::Plane(0,1,0,-min_y));
polytope.add(osg::Plane(0,-1,0,max_y));
polytope.add(osg::Plane(0,0,1,0));
osgUtil::PolytopeIntersector* picker = new osgUtil::PolytopeIntersector( osgUtil::Intersector::WINDOW, polytope );
double mx = viewport->x() + (int)((double )viewport->width()*(ea.getXnormalized()*0.5+0.5));
double my = viewport->y() + (int)((double )viewport->height()*(ea.getYnormalized()*0.5+0.5));
// half width, height.
double w = 5.0f;
double h = 5.0f;
osgUtil::PolytopeIntersector* picker = new osgUtil::PolytopeIntersector( osgUtil::Intersector::WINDOW, mx-w, my-h, mx+w, my+h );
#else
double mx = ea.getXnormalized();
double my = ea.getYnormalized();
double w = 0.05;
double h = 0.05;
osgUtil::PolytopeIntersector* picker = new osgUtil::PolytopeIntersector( osgUtil::Intersector::PROJECTION, mx-w, my-h, mx+w, my+h );
#endif
osgUtil::IntersectionVisitor iv(picker);
viewer->getCamera()->accept(iv);
@@ -235,15 +231,15 @@ public:
{
#if 0
// use non dimension coordinates - in projection/clip space
osgUtil::LineSegmentIntersector* picker = new osgUtil::LineSegmentIntersector(osgUtil::Intersector::PROJECTION, osg::Vec3d(ea.getXnormalized(),ea.getYnormalized(),-1.0), osg::Vec3d(ea.getXnormalized(),ea.getYnormalized(),1.0) );
// use non dimensional coordinates - in projection/clip space
osgUtil::LineSegmentIntersector* picker = new osgUtil::LineSegmentIntersector( osgUtil::Intersector::PROJECTION, ea.getXnormalized(),ea.getYnormalized() );
#else
// use window coordinates
// remap the mouse x,y into viewport coordinates.
osg::Viewport* viewport = viewer->getCamera()->getViewport();
float mx = viewport->x() + (int)((float)viewport->width()*(ea.getXnormalized()*0.5f+0.5f));
float my = viewport->y() + (int)((float)viewport->height()*(ea.getYnormalized()*0.5f+0.5f));
osgUtil::LineSegmentIntersector* picker = new osgUtil::LineSegmentIntersector(osgUtil::Intersector::WINDOW, osg::Vec3d(mx,my,0.0), osg::Vec3d(mx,my,1.0) );
osgUtil::LineSegmentIntersector* picker = new osgUtil::LineSegmentIntersector( osgUtil::Intersector::WINDOW, mx, my );
#endif
osgUtil::IntersectionVisitor iv(picker);

26
include/osgUtil/IntersectionVisitor
View File

@@ -81,10 +81,18 @@ class Intersector : public osg::Referenced
class OSGUTIL_EXPORT LineSegmentIntersector : public Intersector
{
public:
LineSegmentIntersector(const osg::Vec3d& start, const osg::Vec3d& end, LineSegmentIntersector* parent=0);
/** Construct a LineSegmentIntersector the runs between the secified start and end points in MODEL coordinates. */
LineSegmentIntersector(const osg::Vec3d& start, const osg::Vec3d& end);
LineSegmentIntersector(CoordinateFrame cf, const osg::Vec3d& start, const osg::Vec3d& end, LineSegmentIntersector* parent=0);
/** Construct a LineSegmentIntersector the runs between the secified start and end points in the specified coordinate frame. */
LineSegmentIntersector(CoordinateFrame cf, const osg::Vec3d& start, const osg::Vec3d& end);
/** Convinience constructor for supporting picking in WINDOW, or PROJECTION coorindates
* In WINDOW coordinates creates a start value of (x,y,0) and end value of (x,y,1).
* In PROJECTION coordinates (clip space cube) creates a start value of (x,y,1) and end value of (x,y,-1).
* In VIEW and MODEL coordinates creates a start value of (x,y,0) and end value of (x,y,1).*/
LineSegmentIntersector(CoordinateFrame cf, double x, double y);
struct Intersection
{
@@ -148,10 +156,18 @@ class OSGUTIL_EXPORT PolytopeIntersector : public Intersector
{
public:
PolytopeIntersector(const osg::Polytope& polytope, PolytopeIntersector* parent=0);
/** Construct a PolytopeIntersector using speified polytope in MODEL coordinates.*/
PolytopeIntersector(const osg::Polytope& polytope);
PolytopeIntersector(CoordinateFrame cf, const osg::Polytope& polytope, PolytopeIntersector* parent=0);
/** Construct a PolytopeIntersector using speified polytope in specified coordinate frame.*/
PolytopeIntersector(CoordinateFrame cf, const osg::Polytope& polytope);
/** Convinience constructor for supporting picking in WINDOW, or PROJECTION coorindates
* In WINDOW coordinates (clip space cube) creates a five sided polytope box that has a front face at 0.0 and sides around box xMin, yMin, xMax, yMax.
* In PROJECTION coordinates (clip space cube) creates a five sided polytope box that has a front face at -1 and sides around box xMin, yMin, xMax, yMax.
* In VIEW and MODEL coordinates (clip space cube) creates a five sided polytope box that has a front face at 0.0 and sides around box xMin, yMin, xMax, yMax.*/
PolytopeIntersector(CoordinateFrame cf, double xMin, double yMin, double xMax, double yMax);
struct Intersection
{
Intersection() {}

65
src/osgUtil/IntersectionVisitor.cpp
View File

@@ -210,26 +210,41 @@ struct TriangleIntersector
// LineSegmentIntersector
//
LineSegmentIntersector::LineSegmentIntersector(const osg::Vec3d& start, const osg::Vec3d& end, LineSegmentIntersector* parent):
_parent(parent),
LineSegmentIntersector::LineSegmentIntersector(const osg::Vec3d& start, const osg::Vec3d& end):
_parent(0),
_start(start),
_end(end)
{
}
LineSegmentIntersector::LineSegmentIntersector(CoordinateFrame cf, const osg::Vec3d& start, const osg::Vec3d& end, LineSegmentIntersector* parent):
LineSegmentIntersector::LineSegmentIntersector(CoordinateFrame cf, const osg::Vec3d& start, const osg::Vec3d& end):
Intersector(cf),
_parent(parent),
_parent(0),
_start(start),
_end(end)
{
}
LineSegmentIntersector::LineSegmentIntersector(CoordinateFrame cf, double x, double y):
Intersector(cf),
_parent(0)
{
switch(cf)
{
case WINDOW : _start.set(x,y,0.0); _end.set(x,y,1.0); break;
case PROJECTION : _start.set(x,y,1.0); _end.set(x,y,-1.0); break;
case VIEW : _start.set(x,y,0.0); _end.set(x,y,1.0); break;
case MODEL : _start.set(x,y,0.0); _end.set(x,y,1.0); break;
}
}
Intersector* LineSegmentIntersector::clone(osgUtil::IntersectionVisitor& iv)
{
if (_coordinateFrame==MODEL && iv.getModelMatrix()==0)
{
return new LineSegmentIntersector(_start, _end, this);
osg::ref_ptr<LineSegmentIntersector> lsi = new LineSegmentIntersector(_start, _end);
lsi->_parent = this;
return lsi.release();
}
// compute the matrix that takes this Intersector from its CoordinateFrame into the local MODEL coordinate frame
@@ -260,7 +275,9 @@ Intersector* LineSegmentIntersector::clone(osgUtil::IntersectionVisitor& iv)
osg::Matrix inverse;
inverse.invert(matrix);
return new LineSegmentIntersector(_start * inverse, _end * inverse, this);
osg::ref_ptr<LineSegmentIntersector> lsi = new LineSegmentIntersector(_start * inverse, _end * inverse);
lsi->_parent = this;
return lsi.release();
}
bool LineSegmentIntersector::enter(const osg::Node& node)
@@ -497,24 +514,46 @@ bool LineSegmentIntersector::intersectAndClip(osg::Vec3d& s, osg::Vec3d& e,const
//
// IntersectorGroup
//
PolytopeIntersector::PolytopeIntersector(const osg::Polytope& polytope, PolytopeIntersector* parent):
_parent(parent),
PolytopeIntersector::PolytopeIntersector(const osg::Polytope& polytope):
_parent(0),
_polytope(polytope)
{
}
PolytopeIntersector::PolytopeIntersector(CoordinateFrame cf, const osg::Polytope& polytope, PolytopeIntersector* parent):
PolytopeIntersector::PolytopeIntersector(CoordinateFrame cf, const osg::Polytope& polytope):
Intersector(cf),
_parent(parent),
_parent(0),
_polytope(polytope)
{
}
PolytopeIntersector::PolytopeIntersector(CoordinateFrame cf, double xMin, double yMin, double xMax, double yMax):
Intersector(cf),
_parent(0)
{
double zNear = 0.0;
switch(cf)
{
case WINDOW : zNear = 0.0; break;
case PROJECTION : zNear = 1.0; break;
case VIEW : zNear = 0.0; break;
case MODEL : zNear = 0.0; break;
}
_polytope.add(osg::Plane(1.0, 0.0, 0.0, -xMin));
_polytope.add(osg::Plane(-1.0,0.0 ,0.0, xMax));
_polytope.add(osg::Plane(0.0, 1.0, 0.0,-yMin));
_polytope.add(osg::Plane(0.0,-1.0,0.0, yMax));
_polytope.add(osg::Plane(0.0,0.0,1.0, zNear));
}
Intersector* PolytopeIntersector::clone(osgUtil::IntersectionVisitor& iv)
{
if (_coordinateFrame==MODEL && iv.getModelMatrix()==0)
{
return new PolytopeIntersector(_polytope, this);
osg::ref_ptr<PolytopeIntersector> pi = new PolytopeIntersector(_polytope);
pi->_parent = this;
return pi.release();
}
// compute the matrix that takes this Intersector from its CoordinateFrame into the local MODEL coordinate frame
@@ -545,7 +584,9 @@ Intersector* PolytopeIntersector::clone(osgUtil::IntersectionVisitor& iv)
osg::Polytope transformedPolytope;
transformedPolytope.setAndTransformProvidingInverse(_polytope, matrix);
return new PolytopeIntersector(transformedPolytope, this);
osg::ref_ptr<PolytopeIntersector> pi = new PolytopeIntersector(transformedPolytope);
pi->_parent = this;
return pi.release();
}
bool PolytopeIntersector::enter(const osg::Node& node)