108 lines
2.8 KiB
C
108 lines
2.8 KiB
C
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#ifndef CAMERA_H
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#define CAMERA_H
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#include <vcg/space/point3.h>
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#include <vcg/math/Matrix44.h>
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#include <windows.h>
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#include <GL/GL.h>
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namespace vcg {
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template <class T> class View {
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public:
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void GetView();
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void SetView();
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Point3<T> Project(const Point3<T> &p) const;
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Point3<T> UnProject(const Point3<T> &p) const;
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Point3<T> ViewPoint();
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//convert coordinates range 0-1 to range 0 viewport[2]
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Point3<T> ScreenToViewport(const Point3<T> &p) const;
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//viceversa
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Point3<T> ViewportToScreen(const Point3<T> &p) const;
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Matrix44<T> proj;
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Matrix44<T> model;
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Matrix44<T> matrix;
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Matrix44<T> inverse;
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int viewport[4];
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};
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template <class T> void View<T>::GetView() {
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double m[16];
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glGetDoublev(GL_PROJECTION_MATRIX, m);
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for(int i = 0; i < 16; i++)
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proj[i] = (T)m[i];
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glGetDoublev(GL_MODELVIEW_MATRIX, m);
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for(int i = 0; i < 16; i++)
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model[i] = (T)m[i];
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glGetIntegerv(GL_VIEWPORT, viewport);
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matrix = model * proj;
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inverse = matrix;
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Invert(inverse);
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}
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template <class T> void View<T>::SetView() {
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}
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template <class T> Point3<T> View<T>::ViewPoint() {
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return inverse * Point3<T>(0, 0, 0);
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/*Matrix44d model(model_matrix);
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model.Invert();
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Point3d view = model * Point3d(0, 0, 0);
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return Point3<T>(view[0], view[1], view[2]); */
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}
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template <class T> Point3<T> View<T>::Project(const Point3<T> &p) const {
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Point3<T> r;
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r = p * matrix;
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r[0] = (r[0]+1)*(viewport[2]/(T)2.0)+viewport[0];
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r[1] =(r[1]+1)*(viewport[3]/(T)2.0)+viewport[1];
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r[1] = viewport[3]-r[1];
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return r;
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/*double r[3];
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gluProject(p[0], p[1], p[2], model_matrix, proj_matrix, viewport, &r[0], &r[1], &r[2]);
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return Point3<T>((T)r[0], (T)r[1], (T)r[2]);*/
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}
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template <class T> Point3<T> View<T>::UnProject(const Point3<T> &p) const {
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Point3<T> s = p;
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s[0] = (p[0]- viewport[0])/ (viewport[2]/(T)2.0) - 1;
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s[1] = (p[1]- viewport[1])/ (viewport[3]/(T)2.0) - 1;
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s[1] = -s[1];
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s[2] = p[2];
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//s[1] = -s[1]; // pezza aggiunta per il tan2.... ?????????????
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s = s * inverse;
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return s;
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/*double r[3];
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gluUnProject(p[0], p[1], p[2], model_matrix, proj_matrix, viewport, &r[0], &r[1], &r[2]);
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return Point3<T>((T)r[0], (T)r[1], (T)r[2]);*/
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}
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template <class T> Point3<T> View<T>::ScreenToViewport(const Point3<T> &p) const {
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Point3<T> a;
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a[0] = (p[0]+1)*(viewport[2]/(T)2.0)+viewport[0];
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a[1] =(p[1]+1)*(viewport[3]/(T)2.0)+viewport[1];
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a[1] = viewport[3] - a[1];
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a[2] = p[2];
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return a;
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}
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//viceversa
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template <class T> Point3<T> View<T>::ViewportToScreen(const Point3<T> &p) const {
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Point3<T> a;
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a[0] = (p[0]- viewport[0])/ (viewport[2]/(T)2.0) - 1;
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a[1] = (p[1]- viewport[1])/ (viewport[3]/(T)2.0) - 1;
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a[1] = -a[1];
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a[2] = p[2];
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//a[1] = -a[1]; // pezza aggiunta per il tan2.... ?????????????
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return a;
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}
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}//namespace
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#endif
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