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SetPerspective and SetFrustum added (same parameters as in opengl)

This commit is contained in:
ganovelli 2004-11-03 09:32:50 +00:00
parent 92f008a33d
commit d0c1352cf3
1 changed files with 44 additions and 6 deletions
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50
vcg/math/camera.h
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@ -48,8 +48,8 @@ creation
#define __VCGLIB_CAMERA
// VCG
#include <vcg/space/point3.h>
#include <vcg/space/point2.h>
#include <vcg/space/Point3.h>
#include <vcg/space/Point2.h>
#include <vcg/math/similarity.h>
namespace vcg{
@ -62,11 +62,12 @@ public:
Camera():
f(0.f),s(vcg::Point2<S>(0.0,0.0)),
c(vcg::Point2<S>(0.0,0.0)),
viewport(vcg::Point2<int>(0.0,0.0)),
viewport(vcg::Point2<int>(0,0)),
_flags(0),viewportM(1)
{}
S f; // Focal Distance (cioe' la distanza del piano immagine dal centro di proiezione
S farend; // farend end of frustum (it doesn influence the projection )
vcg::Point2<S> s; // Scale factor of the image (nei casi in cui a senso)
vcg::Point2<S> c; // pin-hole position
vcg::Point2<int> viewport; // Size viewport (in pixels)
@ -83,14 +84,20 @@ public:
bool IsOrtho(){ return (_flags & ORTHO_BIT);}
void SetOrtho(bool v ){ if(v) _flags |= ORTHO_BIT; else _flags &= ~ORTHO_BIT; };
char & UberFlags() {return _flags;}
public:
/// set the camera specifying the perspecive view
inline void SetPerspective(S angle, S ratio, S near, S farend,vcg::Point2<S> viewport=vcg::Point2<S>(500,-1) );
/// set the camera specifying the frustum view
inline void SetFrustum(S dx, S sx, S bt, S tp, S near, S farend,vcg::Point2<S> viewport=vcg::Point2<S>(500,-1));
/// project a point from space 3d (in the reference system of the camera) to the camera's plane
/// the result is in absolute coordinates
inline vcg::Point2<S> Project(const vcg::Point3<S> & p);
};
/// project a point in the camera plane
template<class S>
vcg::Point2<S> Camera<S>::Project(const vcg::Point3<S> & p){
S tx = p.X();
S ty = p.Y();
@ -117,6 +124,37 @@ vcg::Point2<S> Camera<S>::Project(const vcg::Point3<S> & p){
return q;
}
/// set the camera specifying the perspecive view
template<class S>
void Camera<S>::SetPerspective(S angle, S ratio, S nr, S _far,vcg::Point2<S> vp){
S halfsize[2];
halfsize[1] = tan(math::ToRad(angle/2)) * nr;
halfsize[0] = halfsize[1]*ratio;
SetFrustum(-halfsize[0],halfsize[0],-halfsize[1],halfsize[1],nr,_far,vp);
}
/// set the camera specifying the frustum view
template<class S>
void Camera<S>::SetFrustum(S sx, S dx, S bt, S tp, S nr, S _far,vcg::Point2<S> vp){
S vpt[2];
vpt[0] = dx-sx;
vpt[1] = tp-bt;
viewport[0] = vp[0];
if(vp[1] != -1)
viewport[1] = vp[1];// the user specified the viewport
else
viewport[1] = viewport[0];// default viewport
s[0] = vpt[0]/(S) viewport[0];
s[1] = vpt[1]/(S) viewport[1];
c[0] = -sx/vpt[0] * viewport[0];
c[1] = -bt/vpt[1] * viewport[1];
f =nr;
farend = _far;
}
}
@ -773,7 +811,7 @@ vcg::Point2<S> Camera<S>::Project(const vcg::Point3<S> & p){
//
//// Prende in ingresso il bounding box dell'oggetto da inquadrare e setta projection e modelmatrix
//// in modo da matchare il piu' possibile quelle della camera. Ovviamente (?) si ignora le distorsioni radiali.
//// Nota che bb viene utilizzato solo per settare i near e far plane in maniera sensata.
//// Nota che bb viene utilizzato solo per settare i near e farend plane in maniera sensata.
//void SetGL(const Box3<scalar> &bb,scalar subx0=0, scalar subx1=1,scalar suby0=0,scalar suby1=1)
//{
// scalar _,__;