diff options
Diffstat (limited to 'src/perspective3d.cpp')
| -rw-r--r-- | src/perspective3d.cpp | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/src/perspective3d.cpp b/src/perspective3d.cpp index 8b1b3863d..9321af356 100644 --- a/src/perspective3d.cpp +++ b/src/perspective3d.cpp @@ -180,6 +180,41 @@ Perspective3D::set_vanishing_point (Box3D::Axis const dir, VanishingPoint const } } +void +Perspective3D::set_infinite_direction (Box3D::Axis axis, NR::Point const dir) +{ + Box3D::Axis axis1 = Box3D::get_remaining_axes (axis).first; + Box3D::Axis axis2 = Box3D::get_remaining_axes (axis).second; + Box3D::VanishingPoint *vp1 = get_vanishing_point (axis1); + Box3D::VanishingPoint *vp2 = get_vanishing_point (axis2); + if (fabs (Box3D::determinant (vp1->v_dir, dir)) < Box3D::epsilon || + fabs (Box3D::determinant (vp2->v_dir, dir)) < Box3D::epsilon) { + // This is an ad-hoc correction; we should fix this more thoroughly + double a = NR::atan2 (dir) + 0.01; + this->set_infinite_direction (axis, NR::Point (cos (a), sin (a))); // we call this function again in case there is another conflict (which is unlikely, but possible) + return; + } + + get_vanishing_point (axis)->set_infinite_direction (dir); +} + +void +Perspective3D::rotate (Box3D::Axis const axis, double const angle) +{ + Box3D::VanishingPoint *vp = get_vanishing_point (axis); + if (!vp->is_finite()) { + double a = NR::atan2 (vp->v_dir) * 180/M_PI; + a += angle; + a *= M_PI/180; + this->set_infinite_direction (axis, NR::Point (cos (a), sin (a))); + for (GSList *i = this->boxes; i != NULL; i = i->next) { + sp_3dbox_reshape_after_VP_rotation (SP_3DBOX (i->data), axis); + sp_3dbox_set_z_orders_later_on (SP_3DBOX (i->data)); + } + update_box_reprs(); + } +} + Axis Perspective3D::get_axis_of_VP (VanishingPoint *vp) { |