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Added Unproject, from 2D local space + Zdepth to 3D camera space. Added ViewportToLocal, inverse of LocalToViewport

This commit is contained in:
Marco Callieri 2005-12-12 16:52:55 +00:00
parent 1885e99e9d
commit f6261d2a45
1 changed files with 28 additions and 0 deletions
vcg/math
camera.h

28
vcg/math/camera.h
View File

@ -23,6 +23,9 @@
/**************************************************************************** /****************************************************************************
History History
$Log: not supported by cvs2svn $ $Log: not supported by cvs2svn $
Revision 1.24 2005/12/01 01:03:37 cignoni
Removed excess ';' from end of template functions, for gcc compiling
Revision 1.23 2005/10/12 16:43:32 ponchio Revision 1.23 2005/10/12 16:43:32 ponchio
Added IsOrtho... Added IsOrtho...
@ -203,7 +206,9 @@ public:
/// project a point from space 3d (in the reference system of the camera) to the camera's plane /// project a point from space 3d (in the reference system of the camera) to the camera's plane
/// the result is in absolute coordinates /// the result is in absolute coordinates
inline vcg::Point2<S> Project(const vcg::Point3<S> & p); inline vcg::Point2<S> Project(const vcg::Point3<S> & p);
inline vcg::Point3<S> UnProject(const vcg::Point2<S> & p, const S & d);
inline vcg::Point2<S> LocalToViewport(const vcg::Point2<S> & p); inline vcg::Point2<S> LocalToViewport(const vcg::Point2<S> & p);
inline vcg::Point2<S> ViewportToLocal(const vcg::Point2<S> & p);
inline vcg::Point2<S> LocalTo_0_1(const vcg::Point2<S> & p); inline vcg::Point2<S> LocalTo_0_1(const vcg::Point2<S> & p);
inline vcg::Point2<S> LocalTo_neg1_1(const vcg::Point2<S> & p); inline vcg::Point2<S> LocalTo_neg1_1(const vcg::Point2<S> & p);
}; };
@ -221,6 +226,21 @@ vcg::Point2<S> Camera<S>::Project(const vcg::Point3<S> & p){
return q; return q;
} }
/// project back a 2D point on LOCAL plane + Zdepth to 3D camera space coord
template<class S>
vcg::Point3<S> Camera<S>::UnProject(const vcg::Point2<S> & p, const S & d)
{
vcg::Point3<S> np = Point3<S>(p[0], p[1], d);
if(!IsOrtho())
{
np[0] /= f/d;
np[1] /= f/d;
}
return np;
}
template<class S> template<class S>
vcg::Point2<S> Camera<S>::LocalToViewport(const vcg::Point2<S> & p){ vcg::Point2<S> Camera<S>::LocalToViewport(const vcg::Point2<S> & p){
vcg::Point2<S> ps; vcg::Point2<S> ps;
@ -229,6 +249,14 @@ vcg::Point2<S> Camera<S>::LocalToViewport(const vcg::Point2<S> & p){
return ps; return ps;
} }
template<class S>
vcg::Point2<S> Camera<S>::ViewportToLocal(const vcg::Point2<S> & p){
vcg::Point2<S> ps;
ps[0] = (p[0]-c.X()) * s.X();
ps[1] = (p[1]-c.Y()) * s.Y();
return ps;
}
template<class S> template<class S>
vcg::Point2<S> Camera<S>::LocalTo_0_1(const vcg::Point2<S> & p){ vcg::Point2<S> Camera<S>::LocalTo_0_1(const vcg::Point2<S> & p){
vcg::Point2<S> ps; vcg::Point2<S> ps;