Val view_parse(int pass, Pval *pl)
{
Val v = {V_NULL, 0};
if (pass == T_EXEC) {
View *view = initview();
Vector3 ref = pvl_get_v3(pl, "from", v3_make(0,-5,0));
Vector3 at = pvl_get_v3(pl, "at", v3_make(0,0,0));
Vector3 up = pvl_get_v3(pl, "up", v3_make(0,0,1));
double fov = pvl_get_num(pl, "fov", 90);
double w = pvl_get_num(pl, "imgw", 320);
double h = pvl_get_num(pl, "imgh", 240);
lookat(view, ref.x, ref.y, ref.z, at.x, at.y, at.z, up.x, up.y, up.z);
setviewpoint(ref.x, ref.y, ref.z);
setviewnormal(at.x - ref.x ,at.y - ref.y, at.z - ref.z);
makeviewV();
perspective(view, fov * DTOR, w/h, 1.0, 100000.0);
viewport(view, 0.,0., w, h);
v.type = V_CAMERA;
v.u.v = view;
}
return v;
}
void lookat(View *v, Real vx, Real vy, Real vz,
Real px, Real py, Real pz, Real ux, Real uy, Real uz)
{
setview(v);
setviewpoint(vx, vy, vz);
setviewnormal(px - vx ,py - vy, pz - vz);
setviewup(ux, uy, uz);
makeviewV();
}
View* initview(void)
{
setview(NEWSTRUCT(View));
setviewdefaults();
makeviewV();
makeviewC();
makeviewP();
makeviewS();
return getview();
}
void camera(View *v, Real rx, Real ry, Real rz, Real nx, Real ny, Real nz
, Real ux, Real uy, Real uz, Real deye)
{
setview(v);
setviewup(ux, uy, uz);
setviewnormal(nx, ny, nz);
setviewpoint(rx - (v->normal.x*deye),
ry - (v->normal.y*deye),
rz - (v->normal.z*deye));
makeviewV();
}
void polarview(View *v, Real dist, Real azimuth, Real pich, Real roll)
{
setview(v);
setviewnormal(sin(azimuth)*cos(pich), cos(azimuth)*cos(pich), sin(pich));
setviewpoint(-dist * v->normal.x,-dist * v->normal.y, -dist * v->normal.z );
if (fabs(v->normal.x) < ROUNDOFF && fabs(v->normal.y) < ROUNDOFF)
setviewup(sin(roll)*v->normal.z, -cos(roll)*v->normal.z,0.0);
else
setviewup(sin(roll)*v->normal.y, -sin(roll)*v->normal.x,
cos(roll)*hypot(v->normal.x,v->normal.y));
makeviewV();
}
void GLWidget::keyPressEvent(QKeyEvent *event)
{
Matrix4 M;
Vector3 Dir;
switch (event->key()) {
case Qt::Key_Q:
case Qt::Key_A:
M = m4_rotate('y', 0.5);
scene->view->center = v3_m4mult(scene->view->center,M);
scene->view->normal = v3_m4mult(scene->view->normal,M);
makeviewV();
setview(scene->view);
break;
case Qt::Key_D:
M = m4_rotate('y', -0.5);
scene->view->center = v3_m4mult(scene->view->center,M);
scene->view->normal = v3_m4mult(scene->view->normal,M);
makeviewV();
setview(scene->view);
break;
case Qt::Key_W:
M = m4_rotate('x', 0.5);
scene->view->center = v3_m4mult(scene->view->center,M);
scene->view->up = v3_m4mult(scene->view->up,M);
scene->view->normal = v3_m4mult(scene->view->normal,M);
makeviewV();
setview(scene->view);
break;
case Qt::Key_S:
M = m4_rotate('x', -0.5);
scene->view->center = v3_m4mult(scene->view->center,M);
scene->view->up = v3_m4mult(scene->view->up,M);
scene->view->normal = v3_m4mult(scene->view->normal,M);
makeviewV();
setview(scene->view);
break;
case Qt::Key_Left:
Dir = v3_cross(scene->view->up,scene->view->normal);
scene->view->center = v3_add(scene->view->center,v3_scale(0.5,Dir));
makeviewV();
setview(scene->view);
break;
case Qt::Key_Right:
Dir = v3_cross(scene->view->up,scene->view->normal);
scene->view->center = v3_sub(scene->view->center,v3_scale(0.5,Dir));
makeviewV();
setview(scene->view);
break;
case Qt::Key_Up:
scene->view->center = v3_add(scene->view->center,v3_scale(0.5,scene->view->up));
makeviewV();
setview(scene->view);
break;
case Qt::Key_Down:
scene->view->center = v3_sub(scene->view->center,v3_scale(0.5,scene->view->up));
makeviewV();
setview(scene->view);
break;
case Qt::Key_Escape:
exit(0);
break;
case Qt::Key_R:
if (!lastfile.isEmpty())
load_scene_file(lastfile.toLatin1().data());
break;
}
update();
}
