#include <fxengine/camera.h>
#include <gint/std/string.h>


void fe_view_set(const fe_camera * cam)
{
    fe_view_set_param(cam->dh, cam->dv, cam->roll, &cam->pos);
}


void fe_view_set_param(const double dh, const double dv, const double roulis, const fe_ipoint * camera)
{
    const double A=fe_cos(dv);
    const double B=fe_sin(dv);

    const double C=fe_cos(roulis);
    const double D=fe_sin(roulis);

    const double E=fe_cos(dh);
    const double F=fe_sin(dh);

    // raccourcis
    const double AD=A*D, BD=B*D;

    fe_matrix[0][0]=C*E;
    fe_matrix[0][1]=-C*F;
    fe_matrix[0][2]=D;

    fe_matrix[1][0]=BD*E+A*F;
    fe_matrix[1][1]=-BD*F+A*E;
    fe_matrix[1][2]=-B*C;

    fe_matrix[2][0]=-AD*E+B*F;
    fe_matrix[2][1]=AD*F+B*E;
    fe_matrix[2][2]=A*C;

    // assigner delta
    memcpy(&fe_translate_delta, camera, sizeof(fe_ipoint));
}