// Project the viewer's position onto the grid plane. If more than threshold distance
// from grid center, move grid center.
void maybe_create_new_grid(grid* gridp, vector *pos, matrix *orient, int force)
{
int roundoff;
plane tplane;
vector gpos, tmp, c;
float dist_to_plane;
float square_size, ux, uy, uz;
ux = tplane.A = gridp->gmatrix.v.uvec.xyz.x;
uy = tplane.B = gridp->gmatrix.v.uvec.xyz.y;
uz = tplane.C = gridp->gmatrix.v.uvec.xyz.z;
tplane.D = gridp->planeD;
compute_point_on_plane(&c, &tplane, pos);
dist_to_plane = fl_abs(vm_dist_to_plane(pos, &gridp->gmatrix.v.uvec, &c));
square_size = 1.0f;
while (dist_to_plane >= 25.0f)
{
square_size *= 10.0f;
dist_to_plane /= 10.0f;
}
if (fvi_ray_plane(&gpos, &gridp->center, &gridp->gmatrix.v.uvec, pos, &orient->v.fvec, 0.0f)<0.0f) {
vector p;
vm_vec_scale_add(&p,pos,&orient->v.fvec, 100.0f );
compute_point_on_plane(&gpos, &tplane, &p );
}
if (vm_vec_dist(&gpos, &c) > 50.0f * square_size)
{
vm_vec_sub(&tmp, &gpos, &c);
vm_vec_normalize(&tmp);
vm_vec_scale_add(&gpos, &c, &tmp, 50.0f * square_size);
}
roundoff = (int) square_size * 10;
if (!ux)
gpos.xyz.x = fl_roundoff(gpos.xyz.x, roundoff);
if (!uy)
gpos.xyz.y = fl_roundoff(gpos.xyz.y, roundoff);
if (!uz)
gpos.xyz.z = fl_roundoff(gpos.xyz.z, roundoff);
if ((square_size != gridp->square_size) ||
(gpos.xyz.x != gridp->center.xyz.x) ||
(gpos.xyz.y != gridp->center.xyz.y) ||
(gpos.xyz.z != gridp->center.xyz.z) || force)
{
gridp->square_size = square_size;
gridp->center = gpos;
modify_grid(gridp);
}
}
void CGrid::OnVScroll(UINT nSBCode, UINT nPos, CScrollBar* pScrollBar) {
CString strValue;
CSpinButtonCtrl* pSpin = (CSpinButtonCtrl*) GetDlgItem(IDC_SPIN_GRID_SIZE);
strValue.Format("%i", pSpin->GetPos());
pSpin->GetBuddy()->SetWindowText(strValue);
The_grid->nrows = pSpin->GetPos() * 5;
The_grid->ncols = The_grid->nrows;
modify_grid(The_grid);
CDialog::OnVScroll(nSBCode, nPos, pScrollBar);
}
void adjust_grid_dlg::OnOK()
{
UpdateData(TRUE);
The_grid->center.x = (float) m_x;
The_grid->center.y = (float) m_y;
The_grid->center.z = (float) m_z;
if (((CButton *) GetDlgItem(IDC_XY_PLANE)) -> GetCheck()) {
The_grid->gmatrix.fvec = vmd_x_vector;
The_grid->gmatrix.rvec = vmd_y_vector;
} else if (((CButton *) GetDlgItem(IDC_YZ_PLANE)) -> GetCheck()) {
The_grid->gmatrix.fvec = vmd_y_vector;
The_grid->gmatrix.rvec = vmd_z_vector;
} else { // XZ plane
The_grid->gmatrix.fvec = vmd_x_vector;
The_grid->gmatrix.rvec = vmd_z_vector;
}
modify_grid(The_grid);
CDialog::OnOK();
}
