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Diffstat (limited to 'src/box3d.cpp')
| -rw-r--r-- | src/box3d.cpp | 1359 |
1 files changed, 0 insertions, 1359 deletions
diff --git a/src/box3d.cpp b/src/box3d.cpp deleted file mode 100644 index af1d00b0f..000000000 --- a/src/box3d.cpp +++ /dev/null @@ -1,1359 +0,0 @@ -/* - * SVG <box3d> implementation - * - * Authors: - * Maximilian Albert <Anhalter42@gmx.de> - * Lauris Kaplinski <lauris@kaplinski.com> - * bulia byak <buliabyak@users.sf.net> - * Abhishek Sharma - * Jon A. Cruz <jon@joncruz.org> - * - * Copyright (C) 2007 Authors - * Copyright (C) 1999-2002 Lauris Kaplinski - * Copyright (C) 2000-2001 Ximian, Inc. - * - * Released under GNU GPL, read the file 'COPYING' for more information - */ - -#include "box3d.h" - -#include <glibmm/i18n.h> -#include "attributes.h" -#include "xml/document.h" -#include "xml/repr.h" - -#include "bad-uri-exception.h" -#include "box3d-side.h" -#include "ui/tools/box3d-tool.h" -#include "perspective-line.h" -#include "persp3d-reference.h" -#include "uri.h" -#include <2geom/line.h> -#include "sp-guide.h" -#include "sp-namedview.h" - -#include "desktop.h" - -#include "macros.h" - -static void box3d_ref_changed(SPObject *old_ref, SPObject *ref, SPBox3D *box); - -static gint counter = 0; - -SPBox3D::SPBox3D() : SPGroup() { - this->my_counter = 0; - this->swapped = Box3D::NONE; - - this->persp_href = NULL; - this->persp_ref = new Persp3DReference(this); - - /* we initialize the z-orders to zero so that they are updated during dragging */ - for (int i = 0; i < 6; ++i) { - z_orders[i] = 0; - } -} - -SPBox3D::~SPBox3D() { -} - -void SPBox3D::build(SPDocument *document, Inkscape::XML::Node *repr) { - SPGroup::build(document, repr); - - my_counter = counter++; - - /* we initialize the z-orders to zero so that they are updated during dragging */ - for (int i = 0; i < 6; ++i) { - z_orders[i] = 0; - } - - // TODO: Create/link to the correct perspective - - if ( document ) { - persp_ref->changedSignal().connect(sigc::bind(sigc::ptr_fun(box3d_ref_changed), this)); - - readAttr( "inkscape:perspectiveID" ); - readAttr( "inkscape:corner0" ); - readAttr( "inkscape:corner7" ); - } -} - -void SPBox3D::release() { - SPBox3D* object = this; - SPBox3D *box = object; - - if (box->persp_href) { - g_free(box->persp_href); - } - - // We have to store this here because the Persp3DReference gets destroyed below, but we need to - // access it to call persp3d_remove_box(), which cannot be called earlier because the reference - // needs to be destroyed first. - Persp3D *persp = box3d_get_perspective(box); - - if (box->persp_ref) { - box->persp_ref->detach(); - delete box->persp_ref; - box->persp_ref = NULL; - } - - if (persp) { - persp3d_remove_box (persp, box); - /* - // TODO: This deletes a perspective when the last box referring to it is gone. Eventually, - // it would be nice to have this but currently it crashes when undoing/redoing box deletion - // Reason: When redoing a box deletion, the associated perspective is deleted twice, first - // by the following code and then again by the redo mechanism! Perhaps we should perform - // deletion of the perspective from another location "outside" the undo/redo mechanism? - if (persp->perspective_impl->boxes.empty()) { - SPDocument *doc = box->document; - persp->deleteObject(); - doc->setCurrentPersp3D(persp3d_document_first_persp(doc)); - } - */ - } - - SPGroup::release(); -} - -void SPBox3D::set(unsigned int key, const gchar* value) { - SPBox3D* object = this; - SPBox3D *box = object; - - switch (key) { - case SP_ATTR_INKSCAPE_BOX3D_PERSPECTIVE_ID: - if ( value && box->persp_href && ( strcmp(value, box->persp_href) == 0 ) ) { - /* No change, do nothing. */ - } else { - if (box->persp_href) { - g_free(box->persp_href); - box->persp_href = NULL; - } - if (value) { - box->persp_href = g_strdup(value); - - // Now do the attaching, which emits the changed signal. - try { - box->persp_ref->attach(Inkscape::URI(value)); - } catch (Inkscape::BadURIException &e) { - g_warning("%s", e.what()); - box->persp_ref->detach(); - } - } else { - // Detach, which emits the changed signal. - box->persp_ref->detach(); - } - } - - // FIXME: Is the following update doubled by some call in either persp3d.cpp or vanishing_point_new.cpp? - box3d_position_set(box); - break; - case SP_ATTR_INKSCAPE_BOX3D_CORNER0: - if (value && strcmp(value, "0 : 0 : 0 : 0")) { - box->orig_corner0 = Proj::Pt3(value); - box->save_corner0 = box->orig_corner0; - box3d_position_set(box); - } - break; - case SP_ATTR_INKSCAPE_BOX3D_CORNER7: - if (value && strcmp(value, "0 : 0 : 0 : 0")) { - box->orig_corner7 = Proj::Pt3(value); - box->save_corner7 = box->orig_corner7; - box3d_position_set(box); - } - break; - default: - SPGroup::set(key, value); - break; - } -} - -/** - * Gets called when (re)attached to another perspective. - */ -static void -box3d_ref_changed(SPObject *old_ref, SPObject *ref, SPBox3D *box) -{ - if (old_ref) { - sp_signal_disconnect_by_data(old_ref, box); - Persp3D *oldPersp = dynamic_cast<Persp3D *>(old_ref); - if (oldPersp) { - persp3d_remove_box(oldPersp, box); - } - } - Persp3D *persp = dynamic_cast<Persp3D *>(ref); - if ( persp && (ref != box) ) // FIXME: Comparisons sane? - { - persp3d_add_box(persp, box); - } -} - -void SPBox3D::update(SPCtx *ctx, guint flags) { - if (flags & (SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG | SP_OBJECT_VIEWPORT_MODIFIED_FLAG)) { - - /* FIXME?: Perhaps the display updates of box sides should be instantiated from here, but this - causes evil update loops so it's all done from box3d_position_set, which is called from - various other places (like the handlers in shape-editor-knotholders.cpp, vanishing-point.cpp, etc. */ - - } - - // Invoke parent method - SPGroup::update(ctx, flags); -} - -Inkscape::XML::Node* SPBox3D::write(Inkscape::XML::Document *xml_doc, Inkscape::XML::Node *repr, guint flags) { - SPBox3D* object = this; - SPBox3D *box = object; - - if ((flags & SP_OBJECT_WRITE_BUILD) && !repr) { - // this is where we end up when saving as plain SVG (also in other circumstances?) - // thus we don' set "sodipodi:type" so that the box is only saved as an ordinary svg:g - repr = xml_doc->createElement("svg:g"); - } - - if (flags & SP_OBJECT_WRITE_EXT) { - - if (box->persp_href) { - repr->setAttribute("inkscape:perspectiveID", box->persp_href); - } else { - /* box is not yet linked to a perspective; use the document's current perspective */ - SPDocument *doc = object->document; - if (box->persp_ref->getURI()) { - gchar *uri_string = box->persp_ref->getURI()->toString(); - repr->setAttribute("inkscape:perspectiveID", uri_string); - g_free(uri_string); - } else { - Glib::ustring href = "#"; - href += doc->getCurrentPersp3D()->getId(); - repr->setAttribute("inkscape:perspectiveID", href.c_str()); - } - } - - gchar *coordstr0 = box->orig_corner0.coord_string(); - gchar *coordstr7 = box->orig_corner7.coord_string(); - repr->setAttribute("inkscape:corner0", coordstr0); - repr->setAttribute("inkscape:corner7", coordstr7); - g_free(coordstr0); - g_free(coordstr7); - - box->orig_corner0.normalize(); - box->orig_corner7.normalize(); - - box->save_corner0 = box->orig_corner0; - box->save_corner7 = box->orig_corner7; - } - - SPGroup::write(xml_doc, repr, flags); - - return repr; -} - -const char* SPBox3D::display_name() { - return _("3D Box"); -} - -void box3d_position_set(SPBox3D *box) -{ - /* This draws the curve and calls requestDisplayUpdate() for each side (the latter is done in - box3d_side_position_set() to avoid update conflicts with the parent box) */ - for (auto& obj: box->children) { - Box3DSide *side = dynamic_cast<Box3DSide *>(&obj); - if (side) { - box3d_side_position_set(side); - } - } -} - -Geom::Affine SPBox3D::set_transform(Geom::Affine const &xform) { - // We don't apply the transform to the box directly but instead to its perspective (which is - // done in sp_selection_apply_affine). Here we only adjust strokes, patterns, etc. - - Geom::Affine ret(Geom::Affine(xform).withoutTranslation()); - gdouble const sw = hypot(ret[0], ret[1]); - gdouble const sh = hypot(ret[2], ret[3]); - - for (auto& child: children) { - SPItem *childitem = dynamic_cast<SPItem *>(&child); - if (childitem) { - // Adjust stroke width - childitem->adjust_stroke(sqrt(fabs(sw * sh))); - - // Adjust pattern fill - childitem->adjust_pattern(xform); - - // Adjust gradient fill - childitem->adjust_gradient(xform); - - // Adjust LPE - childitem->adjust_livepatheffect(xform); - } - } - - return Geom::identity(); -} - -static Proj::Pt3 -box3d_get_proj_corner (guint id, Proj::Pt3 const &c0, Proj::Pt3 const &c7) { - return Proj::Pt3 ((id & Box3D::X) ? c7[Proj::X] : c0[Proj::X], - (id & Box3D::Y) ? c7[Proj::Y] : c0[Proj::Y], - (id & Box3D::Z) ? c7[Proj::Z] : c0[Proj::Z], - 1.0); -} - -Proj::Pt3 -box3d_get_proj_corner (SPBox3D const *box, guint id) { - return Proj::Pt3 ((id & Box3D::X) ? box->orig_corner7[Proj::X] : box->orig_corner0[Proj::X], - (id & Box3D::Y) ? box->orig_corner7[Proj::Y] : box->orig_corner0[Proj::Y], - (id & Box3D::Z) ? box->orig_corner7[Proj::Z] : box->orig_corner0[Proj::Z], - 1.0); -} - -Geom::Point -box3d_get_corner_screen (SPBox3D const *box, guint id, bool item_coords) { - Proj::Pt3 proj_corner (box3d_get_proj_corner (box, id)); - if (!box3d_get_perspective(box)) { - return Geom::Point (Geom::infinity(), Geom::infinity()); - } - Geom::Affine const i2d(box->i2dt_affine ()); - if (item_coords) { - return box3d_get_perspective(box)->perspective_impl->tmat.image(proj_corner).affine() * i2d.inverse(); - } else { - return box3d_get_perspective(box)->perspective_impl->tmat.image(proj_corner).affine(); - } -} - -Proj::Pt3 -box3d_get_proj_center (SPBox3D *box) { - box->orig_corner0.normalize(); - box->orig_corner7.normalize(); - return Proj::Pt3 ((box->orig_corner0[Proj::X] + box->orig_corner7[Proj::X]) / 2, - (box->orig_corner0[Proj::Y] + box->orig_corner7[Proj::Y]) / 2, - (box->orig_corner0[Proj::Z] + box->orig_corner7[Proj::Z]) / 2, - 1.0); -} - -Geom::Point -box3d_get_center_screen (SPBox3D *box) { - Proj::Pt3 proj_center (box3d_get_proj_center (box)); - if (!box3d_get_perspective(box)) { - return Geom::Point (Geom::infinity(), Geom::infinity()); - } - Geom::Affine const i2d( box->i2dt_affine() ); - return box3d_get_perspective(box)->perspective_impl->tmat.image(proj_center).affine() * i2d.inverse(); -} - -/* - * To keep the snappoint from jumping randomly between the two lines when the mouse pointer is close to - * their intersection, we remember the last snapped line and keep snapping to this specific line as long - * as the distance from the intersection to the mouse pointer is less than remember_snap_threshold. - */ - -// Should we make the threshold settable in the preferences? -static double remember_snap_threshold = 30; -static guint remember_snap_index = 0; - -// constant for sizing the array of points to be considered: -static const int MAX_POINT_COUNT = 4; - -static Proj::Pt3 -box3d_snap (SPBox3D *box, int id, Proj::Pt3 const &pt_proj, Proj::Pt3 const &start_pt) { - double z_coord = start_pt[Proj::Z]; - double diff_x = box->save_corner7[Proj::X] - box->save_corner0[Proj::X]; - double diff_y = box->save_corner7[Proj::Y] - box->save_corner0[Proj::Y]; - double x_coord = start_pt[Proj::X]; - double y_coord = start_pt[Proj::Y]; - Proj::Pt3 A_proj (x_coord, y_coord, z_coord, 1.0); - Proj::Pt3 B_proj (x_coord + diff_x, y_coord, z_coord, 1.0); - Proj::Pt3 C_proj (x_coord + diff_x, y_coord + diff_y, z_coord, 1.0); - Proj::Pt3 D_proj (x_coord, y_coord + diff_y, z_coord, 1.0); - Proj::Pt3 E_proj (x_coord - diff_x, y_coord + diff_y, z_coord, 1.0); - - Persp3DImpl *persp_impl = box3d_get_perspective(box)->perspective_impl; - Geom::Point A = persp_impl->tmat.image(A_proj).affine(); - Geom::Point B = persp_impl->tmat.image(B_proj).affine(); - Geom::Point C = persp_impl->tmat.image(C_proj).affine(); - Geom::Point D = persp_impl->tmat.image(D_proj).affine(); - Geom::Point E = persp_impl->tmat.image(E_proj).affine(); - Geom::Point pt = persp_impl->tmat.image(pt_proj).affine(); - - // TODO: Replace these lines between corners with lines from a corner to a vanishing point - // (this might help to prevent rounding errors if the box is small) - Box3D::Line pl1(A, B); - Box3D::Line pl2(A, D); - Box3D::Line diag1(A, (id == -1 || (!(id & Box3D::X) == !(id & Box3D::Y))) ? C : E); - Box3D::Line diag2(A, E); // diag2 is only taken into account if id equals -1, i.e., if we are snapping the center - - int num_snap_lines = (id != -1) ? 3 : 4; - Geom::Point snap_pts[MAX_POINT_COUNT]; - - snap_pts[0] = pl1.closest_to (pt); - snap_pts[1] = pl2.closest_to (pt); - snap_pts[2] = diag1.closest_to (pt); - if (id == -1) { - snap_pts[3] = diag2.closest_to (pt); - } - - gdouble const zoom = SP_ACTIVE_DESKTOP->current_zoom(); - - // determine the distances to all potential snapping points - double snap_dists[MAX_POINT_COUNT]; - for (int i = 0; i < num_snap_lines; ++i) { - snap_dists[i] = Geom::L2 (snap_pts[i] - pt) * zoom; - } - - // while we are within a given tolerance of the starting point, - // keep snapping to the same point to avoid jumping - bool within_tolerance = true; - for (int i = 0; i < num_snap_lines; ++i) { - if (snap_dists[i] > remember_snap_threshold) { - within_tolerance = false; - break; - } - } - - // find the closest snapping point - int snap_index = -1; - double snap_dist = Geom::infinity(); - for (int i = 0; i < num_snap_lines; ++i) { - if (snap_dists[i] < snap_dist) { - snap_index = i; - snap_dist = snap_dists[i]; - } - } - - // snap to the closest point (or the previously remembered one - // if we are within tolerance of the starting point) - Geom::Point result; - if (within_tolerance) { - result = snap_pts[remember_snap_index]; - } else { - remember_snap_index = snap_index; - result = snap_pts[snap_index]; - } - return box3d_get_perspective(box)->perspective_impl->tmat.preimage (result, z_coord, Proj::Z); -} - -SPBox3D * SPBox3D::createBox3D(SPItem * parent) -{ - SPBox3D *box3d = 0; - Inkscape::XML::Document *xml_doc = parent->document->rdoc; - Inkscape::XML::Node *repr = xml_doc->createElement("svg:g"); - repr->setAttribute("sodipodi:type", "inkscape:box3d"); - box3d = reinterpret_cast<SPBox3D *>(parent->appendChildRepr(repr)); - return box3d; -} - -void -box3d_set_corner (SPBox3D *box, const guint id, Geom::Point const &new_pos, const Box3D::Axis movement, bool constrained) { - g_return_if_fail ((movement != Box3D::NONE) && (movement != Box3D::XYZ)); - - box->orig_corner0.normalize(); - box->orig_corner7.normalize(); - - /* update corners 0 and 7 according to which handle was moved and to the axes of movement */ - if (!(movement & Box3D::Z)) { - Persp3DImpl *persp_impl = box3d_get_perspective(box)->perspective_impl; - Proj::Pt3 pt_proj (persp_impl->tmat.preimage (new_pos, (id < 4) ? box->orig_corner0[Proj::Z] : - box->orig_corner7[Proj::Z], Proj::Z)); - if (constrained) { - pt_proj = box3d_snap (box, id, pt_proj, box3d_get_proj_corner (id, box->save_corner0, box->save_corner7)); - } - - // normalizing pt_proj is essential because we want to mingle affine coordinates - pt_proj.normalize(); - box->orig_corner0 = Proj::Pt3 ((id & Box3D::X) ? box->save_corner0[Proj::X] : pt_proj[Proj::X], - (id & Box3D::Y) ? box->save_corner0[Proj::Y] : pt_proj[Proj::Y], - box->save_corner0[Proj::Z], - 1.0); - box->orig_corner7 = Proj::Pt3 ((id & Box3D::X) ? pt_proj[Proj::X] : box->save_corner7[Proj::X], - (id & Box3D::Y) ? pt_proj[Proj::Y] : box->save_corner7[Proj::Y], - box->save_corner7[Proj::Z], - 1.0); - } else { - Persp3D *persp = box3d_get_perspective(box); - Persp3DImpl *persp_impl = box3d_get_perspective(box)->perspective_impl; - Box3D::PerspectiveLine pl(persp_impl->tmat.image( - box3d_get_proj_corner (id, box->save_corner0, box->save_corner7)).affine(), - Proj::Z, persp); - Geom::Point new_pos_snapped(pl.closest_to(new_pos)); - Proj::Pt3 pt_proj (persp_impl->tmat.preimage (new_pos_snapped, - box3d_get_proj_corner (box, id)[(movement & Box3D::Y) ? Proj::X : Proj::Y], - (movement & Box3D::Y) ? Proj::X : Proj::Y)); - bool corner0_move_x = !(id & Box3D::X) && (movement & Box3D::X); - bool corner0_move_y = !(id & Box3D::Y) && (movement & Box3D::Y); - bool corner7_move_x = (id & Box3D::X) && (movement & Box3D::X); - bool corner7_move_y = (id & Box3D::Y) && (movement & Box3D::Y); - // normalizing pt_proj is essential because we want to mingle affine coordinates - pt_proj.normalize(); - box->orig_corner0 = Proj::Pt3 (corner0_move_x ? pt_proj[Proj::X] : box->orig_corner0[Proj::X], - corner0_move_y ? pt_proj[Proj::Y] : box->orig_corner0[Proj::Y], - (id & Box3D::Z) ? box->orig_corner0[Proj::Z] : pt_proj[Proj::Z], - 1.0); - box->orig_corner7 = Proj::Pt3 (corner7_move_x ? pt_proj[Proj::X] : box->orig_corner7[Proj::X], - corner7_move_y ? pt_proj[Proj::Y] : box->orig_corner7[Proj::Y], - (id & Box3D::Z) ? pt_proj[Proj::Z] : box->orig_corner7[Proj::Z], - 1.0); - } - // FIXME: Should we update the box here? If so, how? -} - -void box3d_set_center (SPBox3D *box, Geom::Point const &new_pos, Geom::Point const &old_pos, const Box3D::Axis movement, bool constrained) { - g_return_if_fail ((movement != Box3D::NONE) && (movement != Box3D::XYZ)); - - box->orig_corner0.normalize(); - box->orig_corner7.normalize(); - - Persp3D *persp = box3d_get_perspective(box); - if (!(movement & Box3D::Z)) { - double coord = (box->orig_corner0[Proj::Z] + box->orig_corner7[Proj::Z]) / 2; - double radx = (box->orig_corner7[Proj::X] - box->orig_corner0[Proj::X]) / 2; - double rady = (box->orig_corner7[Proj::Y] - box->orig_corner0[Proj::Y]) / 2; - - Proj::Pt3 pt_proj (persp->perspective_impl->tmat.preimage (new_pos, coord, Proj::Z)); - if (constrained) { - Proj::Pt3 old_pos_proj (persp->perspective_impl->tmat.preimage (old_pos, coord, Proj::Z)); - old_pos_proj.normalize(); - pt_proj = box3d_snap (box, -1, pt_proj, old_pos_proj); - } - // normalizing pt_proj is essential because we want to mingle affine coordinates - pt_proj.normalize(); - box->orig_corner0 = Proj::Pt3 ((movement & Box3D::X) ? pt_proj[Proj::X] - radx : box->orig_corner0[Proj::X], - (movement & Box3D::Y) ? pt_proj[Proj::Y] - rady : box->orig_corner0[Proj::Y], - box->orig_corner0[Proj::Z], - 1.0); - box->orig_corner7 = Proj::Pt3 ((movement & Box3D::X) ? pt_proj[Proj::X] + radx : box->orig_corner7[Proj::X], - (movement & Box3D::Y) ? pt_proj[Proj::Y] + rady : box->orig_corner7[Proj::Y], - box->orig_corner7[Proj::Z], - 1.0); - } else { - double coord = (box->orig_corner0[Proj::X] + box->orig_corner7[Proj::X]) / 2; - double radz = (box->orig_corner7[Proj::Z] - box->orig_corner0[Proj::Z]) / 2; - - Box3D::PerspectiveLine pl(old_pos, Proj::Z, persp); - Geom::Point new_pos_snapped(pl.closest_to(new_pos)); - Proj::Pt3 pt_proj (persp->perspective_impl->tmat.preimage (new_pos_snapped, coord, Proj::X)); - - /* normalizing pt_proj is essential because we want to mingle affine coordinates */ - pt_proj.normalize(); - box->orig_corner0 = Proj::Pt3 (box->orig_corner0[Proj::X], - box->orig_corner0[Proj::Y], - pt_proj[Proj::Z] - radz, - 1.0); - box->orig_corner7 = Proj::Pt3 (box->orig_corner7[Proj::X], - box->orig_corner7[Proj::Y], - pt_proj[Proj::Z] + radz, - 1.0); - } -} - -/* - * Manipulates corner1 through corner4 to contain the indices of the corners - * from which the perspective lines in the direction of 'axis' emerge - */ -void box3d_corners_for_PLs (const SPBox3D * box, Proj::Axis axis, - Geom::Point &corner1, Geom::Point &corner2, Geom::Point &corner3, Geom::Point &corner4) -{ - Persp3D *persp = box3d_get_perspective(box); - g_return_if_fail (persp); - Persp3DImpl *persp_impl = persp->perspective_impl; - //box->orig_corner0.normalize(); - //box->orig_corner7.normalize(); - double coord = (box->orig_corner0[axis] > box->orig_corner7[axis]) ? - box->orig_corner0[axis] : - box->orig_corner7[axis]; - - Proj::Pt3 c1, c2, c3, c4; - // FIXME: This can certainly be done more elegantly/efficiently than by a case-by-case analysis. - switch (axis) { - case Proj::X: - c1 = Proj::Pt3 (coord, box->orig_corner0[Proj::Y], box->orig_corner0[Proj::Z], 1.0); - c2 = Proj::Pt3 (coord, box->orig_corner7[Proj::Y], box->orig_corner0[Proj::Z], 1.0); - c3 = Proj::Pt3 (coord, box->orig_corner7[Proj::Y], box->orig_corner7[Proj::Z], 1.0); - c4 = Proj::Pt3 (coord, box->orig_corner0[Proj::Y], box->orig_corner7[Proj::Z], 1.0); - break; - case Proj::Y: - c1 = Proj::Pt3 (box->orig_corner0[Proj::X], coord, box->orig_corner0[Proj::Z], 1.0); - c2 = Proj::Pt3 (box->orig_corner7[Proj::X], coord, box->orig_corner0[Proj::Z], 1.0); - c3 = Proj::Pt3 (box->orig_corner7[Proj::X], coord, box->orig_corner7[Proj::Z], 1.0); - c4 = Proj::Pt3 (box->orig_corner0[Proj::X], coord, box->orig_corner7[Proj::Z], 1.0); - break; - case Proj::Z: - c1 = Proj::Pt3 (box->orig_corner7[Proj::X], box->orig_corner7[Proj::Y], coord, 1.0); - c2 = Proj::Pt3 (box->orig_corner7[Proj::X], box->orig_corner0[Proj::Y], coord, 1.0); - c3 = Proj::Pt3 (box->orig_corner0[Proj::X], box->orig_corner0[Proj::Y], coord, 1.0); - c4 = Proj::Pt3 (box->orig_corner0[Proj::X], box->orig_corner7[Proj::Y], coord, 1.0); - break; - default: - return; - } - corner1 = persp_impl->tmat.image(c1).affine(); - corner2 = persp_impl->tmat.image(c2).affine(); - corner3 = persp_impl->tmat.image(c3).affine(); - corner4 = persp_impl->tmat.image(c4).affine(); -} - -/* Auxiliary function: Checks whether the half-line from A to B crosses the line segment joining C and D */ -static bool -box3d_half_line_crosses_joining_line (Geom::Point const &A, Geom::Point const &B, - Geom::Point const &C, Geom::Point const &D) { - Geom::Point n0 = (B - A).ccw(); - double d0 = dot(n0,A); - - Geom::Point n1 = (D - C).ccw(); - double d1 = dot(n1,C); - - Geom::Line lineAB(A,B); - Geom::Line lineCD(C,D); - - Geom::OptCrossing inters = Geom::OptCrossing(); // empty by default - try - { - inters = Geom::intersection(lineAB, lineCD); - } - catch (Geom::InfiniteSolutions& e) - { - // We're probably dealing with parallel lines, so they don't really cross - return false; - } - - if (!inters) { - return false; - } - - Geom::Point E = lineAB.pointAt((*inters).ta); // the point of intersection - - if ((dot(C,n0) < d0) == (dot(D,n0) < d0)) { - // C and D lie on the same side of the line AB - return false; - } - if ((dot(A,n1) < d1) != (dot(B,n1) < d1)) { - // A and B lie on different sides of the line CD - return true; - } else if (Geom::distance(E,A) < Geom::distance(E,B)) { - // The line CD passes on the "wrong" side of A - return false; - } - - // The line CD passes on the "correct" side of A - return true; -} - -static bool -box3d_XY_axes_are_swapped (SPBox3D *box) { - Persp3D *persp = box3d_get_perspective(box); - g_return_val_if_fail(persp, false); - Box3D::PerspectiveLine l1(box3d_get_corner_screen(box, 3, false), Proj::X, persp); - Box3D::PerspectiveLine l2(box3d_get_corner_screen(box, 3, false), Proj::Y, persp); - Geom::Point v1(l1.direction()); - Geom::Point v2(l2.direction()); - v1.normalize(); - v2.normalize(); - - return (v1[Geom::X]*v2[Geom::Y] - v1[Geom::Y]*v2[Geom::X] > 0); -} - -static inline void -box3d_aux_set_z_orders (int z_orders[6], int a, int b, int c, int d, int e, int f) { - z_orders[0] = a; - z_orders[1] = b; - z_orders[2] = c; - z_orders[3] = d; - z_orders[4] = e; - z_orders[5] = f; -} - - -/* - * In standard perspective we have: - * 2 = front face - * 1 = top face - * 0 = left face - * 3 = right face - * 4 = bottom face - * 5 = rear face - */ - -/* All VPs infinite */ -static void -box3d_set_new_z_orders_case0 (SPBox3D *box, int z_orders[6], Box3D::Axis central_axis) { - bool swapped = box3d_XY_axes_are_swapped(box); - - switch(central_axis) { - case Box3D::X: - if (!swapped) { - box3d_aux_set_z_orders (z_orders, 2, 0, 4, 1, 3, 5); - } else { - box3d_aux_set_z_orders (z_orders, 3, 1, 5, 2, 4, 0); - } - break; - case Box3D::Y: - if (!swapped) { - box3d_aux_set_z_orders (z_orders, 2, 3, 1, 4, 0, 5); - } else { - box3d_aux_set_z_orders (z_orders, 5, 0, 4, 1, 3, 2); - } - break; - case Box3D::Z: - if (!swapped) { - box3d_aux_set_z_orders (z_orders, 2, 0, 1, 4, 3, 5); - } else { - box3d_aux_set_z_orders (z_orders, 5, 3, 4, 1, 0, 2); - } - break; - case Box3D::NONE: - if (!swapped) { - box3d_aux_set_z_orders (z_orders, 2, 3, 4, 1, 0, 5); - } else { - box3d_aux_set_z_orders (z_orders, 5, 0, 1, 4, 3, 2); - } - break; - default: - g_assert_not_reached(); - break; - } -} - -/* Precisely one finite VP */ -static void -box3d_set_new_z_orders_case1 (SPBox3D *box, int z_orders[6], Box3D::Axis central_axis, Box3D::Axis fin_axis) { - Persp3D *persp = box3d_get_perspective(box); - Geom::Point vp(persp3d_get_VP(persp, Box3D::toProj(fin_axis)).affine()); - - // note: in some of the case distinctions below we rely upon the fact that oaxis1 and oaxis2 are ordered - Box3D::Axis oaxis1 = Box3D::get_remaining_axes(fin_axis).first; - Box3D::Axis oaxis2 = Box3D::get_remaining_axes(fin_axis).second; - int inside1 = 0; - int inside2 = 0; - inside1 = box3d_pt_lies_in_PL_sector (box, vp, 3, 3 ^ oaxis2, oaxis1); - inside2 = box3d_pt_lies_in_PL_sector (box, vp, 3, 3 ^ oaxis1, oaxis2); - - bool swapped = box3d_XY_axes_are_swapped(box); - - switch(central_axis) { - case Box3D::X: - if (!swapped) { - box3d_aux_set_z_orders (z_orders, 2, 4, 0, 1, 3, 5); - } else { - box3d_aux_set_z_orders (z_orders, 5, 3, 1, 0, 2, 4); - } - break; - case Box3D::Y: - if (inside2 > 0) { - box3d_aux_set_z_orders (z_orders, 1, 2, 3, 0, 5, 4); - } else if (inside2 < 0) { - box3d_aux_set_z_orders (z_orders, 2, 3, 1, 4, 0, 5); - } else { - if (!swapped) { - box3d_aux_set_z_orders (z_orders, 2, 3, 1, 5, 0, 4); - } else { - box3d_aux_set_z_orders (z_orders, 5, 0, 4, 1, 3, 2); - } - } - break; - case Box3D::Z: - if (inside2) { - if (!swapped) { - box3d_aux_set_z_orders (z_orders, 2, 1, 3, 0, 4, 5); - } else { - box3d_aux_set_z_orders (z_orders, 5, 3, 4, 0, 1, 2); - } - } else if (inside1) { - if (!swapped) { - box3d_aux_set_z_orders (z_orders, 2, 0, 1, 4, 3, 5); - } else { - box3d_aux_set_z_orders (z_orders, 5, 3, 4, 1, 0, 2); - } - } else { - // "regular" case - if (!swapped) { - box3d_aux_set_z_orders (z_orders, 0, 1, 2, 5, 4, 3); - } else { - box3d_aux_set_z_orders (z_orders, 5, 3, 4, 0, 2, 1); - } - } - break; - case Box3D::NONE: - if (!swapped) { - box3d_aux_set_z_orders (z_orders, 2, 3, 4, 5, 0, 1); - } else { - box3d_aux_set_z_orders (z_orders, 5, 0, 1, 3, 2, 4); - } - break; - default: - g_assert_not_reached(); - } -} - -/* Precisely 2 finite VPs */ -static void -box3d_set_new_z_orders_case2 (SPBox3D *box, int z_orders[6], Box3D::Axis central_axis, Box3D::Axis /*infinite_axis*/) { - Geom::Point c3(box3d_get_corner_screen(box, 3, false)); - - bool swapped = box3d_XY_axes_are_swapped(box); - - int insidexy = box3d_VP_lies_in_PL_sector (box, Proj::X, 3, 3 ^ Box3D::Z, Box3D::Y); - //int insidexz = box3d_VP_lies_in_PL_sector (box, Proj::X, 3, 3 ^ Box3D::Y, Box3D::Z); - - int insideyx = box3d_VP_lies_in_PL_sector (box, Proj::Y, 3, 3 ^ Box3D::Z, Box3D::X); - int insideyz = box3d_VP_lies_in_PL_sector (box, Proj::Y, 3, 3 ^ Box3D::X, Box3D::Z); - - //int insidezx = box3d_VP_lies_in_PL_sector (box, Proj::Z, 3, 3 ^ Box3D::Y, Box3D::X); - int insidezy = box3d_VP_lies_in_PL_sector (box, Proj::Z, 3, 3 ^ Box3D::X, Box3D::Y); - - switch(central_axis) { - case Box3D::X: - if (!swapped) { - if (insidezy == -1) { - box3d_aux_set_z_orders (z_orders, 2, 4, 0, 1, 3, 5); - } else if (insidexy == 1) { - box3d_aux_set_z_orders (z_orders, 2, 4, 0, 5, 1, 3); - } else { - box3d_aux_set_z_orders (z_orders, 2, 4, 0, 1, 3, 5); - } - } else { - if (insideyz == -1) { - box3d_aux_set_z_orders (z_orders, 3, 1, 5, 0, 2, 4); - } else { - if (!swapped) { - box3d_aux_set_z_orders (z_orders, 3, 1, 5, 2, 4, 0); - } else { - if (insidexy == 0) { - box3d_aux_set_z_orders (z_orders, 3, 5, 1, 0, 2, 4); - } else { - box3d_aux_set_z_orders (z_orders, 3, 1, 5, 0, 2, 4); - } - } - } - } - break; - case Box3D::Y: - if (!swapped) { - if (insideyz == 1) { - box3d_aux_set_z_orders (z_orders, 2, 3, 1, 0, 5, 4); - } else { - box3d_aux_set_z_orders (z_orders, 2, 3, 1, 5, 0, 4); - } - } else { - if (insideyx == 1) { - box3d_aux_set_z_orders (z_orders, 4, 0, 5, 1, 3, 2); - } else { - box3d_aux_set_z_orders (z_orders, 5, 0, 4, 1, 3, 2); - } - } - break; - case Box3D::Z: - if (!swapped) { - if (insidezy == 1) { - box3d_aux_set_z_orders (z_orders, 2, 1, 0, 4, 3, 5); - } else if (insidexy == -1) { - box3d_aux_set_z_orders (z_orders, 2, 1, 0, 5, 4, 3); - } else { - box3d_aux_set_z_orders (z_orders, 2, 0, 1, 5, 3, 4); - } - } else { - box3d_aux_set_z_orders (z_orders, 3, 4, 5, 1, 0, 2); - } - break; - case Box3D::NONE: - if (!swapped) { - box3d_aux_set_z_orders (z_orders, 2, 3, 4, 1, 0, 5); - } else { - box3d_aux_set_z_orders (z_orders, 5, 0, 1, 4, 3, 2); - } - break; - default: - g_assert_not_reached(); - break; - } -} - -/* - * It can happen that during dragging the box is everted. - * In this case the opposite sides in this direction need to be swapped - */ -static Box3D::Axis -box3d_everted_directions (SPBox3D *box) { - Box3D::Axis ev = Box3D::NONE; - - box->orig_corner0.normalize(); - box->orig_corner7.normalize(); - - if (box->orig_corner0[Proj::X] < box->orig_corner7[Proj::X]) - ev = (Box3D::Axis) (ev ^ Box3D::X); - if (box->orig_corner0[Proj::Y] < box->orig_corner7[Proj::Y]) - ev = (Box3D::Axis) (ev ^ Box3D::Y); - if (box->orig_corner0[Proj::Z] > box->orig_corner7[Proj::Z]) // FIXME: Remove the need to distinguish signs among the cases - ev = (Box3D::Axis) (ev ^ Box3D::Z); - - return ev; -} - -static void -box3d_swap_sides(int z_orders[6], Box3D::Axis axis) { - int pos1 = -1; - int pos2 = -1; - - for (int i = 0; i < 6; ++i) { - if (!(Box3D::int_to_face(z_orders[i]) & axis)) { - if (pos1 == -1) { - pos1 = i; - } else { - pos2 = i; - break; - } - } - } - - if ((pos1 != -1) && (pos2 != -1)){ - int tmp = z_orders[pos1]; - z_orders[pos1] = z_orders[pos2]; - z_orders[pos2] = tmp; - } -} - - -bool -box3d_recompute_z_orders (SPBox3D *box) { - Persp3D *persp = box3d_get_perspective(box); - - if (!persp) - return false; - - int z_orders[6]; - - Geom::Point c3(box3d_get_corner_screen(box, 3, false)); - - // determine directions from corner3 to the VPs - int num_finite = 0; - Box3D::Axis axis_finite = Box3D::NONE; - Box3D::Axis axis_infinite = Box3D::NONE; - Geom::Point dirs[3]; - for (int i = 0; i < 3; ++i) { - dirs[i] = persp3d_get_PL_dir_from_pt(persp, c3, Box3D::toProj(Box3D::axes[i])); - if (persp3d_VP_is_finite(persp->perspective_impl, Proj::axes[i])) { - num_finite++; - axis_finite = Box3D::axes[i]; - } else { - axis_infinite = Box3D::axes[i]; - } - } - - // determine the "central" axis (if there is one) - Box3D::Axis central_axis = Box3D::NONE; - if(Box3D::lies_in_sector(dirs[0], dirs[1], dirs[2])) { - central_axis = Box3D::Z; - } else if(Box3D::lies_in_sector(dirs[1], dirs[2], dirs[0])) { - central_axis = Box3D::X; - } else if(Box3D::lies_in_sector(dirs[2], dirs[0], dirs[1])) { - central_axis = Box3D::Y; - } - - switch (num_finite) { - case 0: - // TODO: Remark: In this case (and maybe one of the others, too) the z-orders for all boxes - // coincide, hence only need to be computed once in a more central location. - box3d_set_new_z_orders_case0(box, z_orders, central_axis); - break; - case 1: - box3d_set_new_z_orders_case1(box, z_orders, central_axis, axis_finite); - break; - case 2: - case 3: - box3d_set_new_z_orders_case2(box, z_orders, central_axis, axis_infinite); - break; - default: - /* - * For each VP F, check whether the half-line from the corner3 to F crosses the line segment - * joining the other two VPs. If this is the case, it determines the "central" corner from - * which the visible sides can be deduced. Otherwise, corner3 is the central corner. - */ - // FIXME: We should eliminate the use of Geom::Point altogether - Box3D::Axis central_axis = Box3D::NONE; - Geom::Point vp_x = persp3d_get_VP(persp, Proj::X).affine(); - Geom::Point vp_y = persp3d_get_VP(persp, Proj::Y).affine(); - Geom::Point vp_z = persp3d_get_VP(persp, Proj::Z).affine(); - Geom::Point vpx(vp_x[Geom::X], vp_x[Geom::Y]); - Geom::Point vpy(vp_y[Geom::X], vp_y[Geom::Y]); - Geom::Point vpz(vp_z[Geom::X], vp_z[Geom::Y]); - - Geom::Point c3 = box3d_get_corner_screen(box, 3, false); - Geom::Point corner3(c3[Geom::X], c3[Geom::Y]); - - if (box3d_half_line_crosses_joining_line (corner3, vpx, vpy, vpz)) { - central_axis = Box3D::X; - } else if (box3d_half_line_crosses_joining_line (corner3, vpy, vpz, vpx)) { - central_axis = Box3D::Y; - } else if (box3d_half_line_crosses_joining_line (corner3, vpz, vpx, vpy)) { - central_axis = Box3D::Z; - } - - // FIXME: At present, this is not used. Why is it calculated? - /* - unsigned int central_corner = 3 ^ central_axis; - if (central_axis == Box3D::Z) { - central_corner = central_corner ^ Box3D::XYZ; - } - if (box3d_XY_axes_are_swapped(box)) { - central_corner = central_corner ^ Box3D::XYZ; - } - */ - - Geom::Point c1(box3d_get_corner_screen(box, 1, false)); - Geom::Point c2(box3d_get_corner_screen(box, 2, false)); - Geom::Point c7(box3d_get_corner_screen(box, 7, false)); - - Geom::Point corner1(c1[Geom::X], c1[Geom::Y]); - Geom::Point corner2(c2[Geom::X], c2[Geom::Y]); - Geom::Point corner7(c7[Geom::X], c7[Geom::Y]); - // FIXME: At present we don't use the information about central_corner computed above. - switch (central_axis) { - case Box3D::Y: - if (!box3d_half_line_crosses_joining_line(vpz, vpy, corner3, corner2)) { - box3d_aux_set_z_orders (z_orders, 2, 3, 1, 5, 0, 4); - } else { - // degenerate case - box3d_aux_set_z_orders (z_orders, 2, 1, 3, 0, 5, 4); - } - break; - - case Box3D::Z: - if (box3d_half_line_crosses_joining_line(vpx, vpz, corner3, corner1)) { - // degenerate case - box3d_aux_set_z_orders (z_orders, 2, 0, 1, 4, 3, 5); - } else if (box3d_half_line_crosses_joining_line(vpx, vpy, corner3, corner7)) { - // degenerate case - box3d_aux_set_z_orders (z_orders, 2, 1, 0, 5, 3, 4); - } else { - box3d_aux_set_z_orders (z_orders, 2, 1, 0, 3, 4, 5); - } - break; - - case Box3D::X: - if (box3d_half_line_crosses_joining_line(vpz, vpx, corner3, corner1)) { - // degenerate case - box3d_aux_set_z_orders (z_orders, 2, 1, 0, 4, 5, 3); - } else { - box3d_aux_set_z_orders (z_orders, 2, 4, 0, 5, 1, 3); - } - break; - - case Box3D::NONE: - box3d_aux_set_z_orders (z_orders, 2, 3, 4, 1, 0, 5); - break; - - default: - g_assert_not_reached(); - break; - } // end default case - } - - // TODO: If there are still errors in z-orders of everted boxes, we need to choose a variable corner - // instead of the hard-coded corner #3 in the computations above - Box3D::Axis ev = box3d_everted_directions(box); - for (int i = 0; i < 3; ++i) { - if (ev & Box3D::axes[i]) { - box3d_swap_sides(z_orders, Box3D::axes[i]); - } - } - - // Check whether anything actually changed - for (int i = 0; i < 6; ++i) { - if (box->z_orders[i] != z_orders[i]) { - for (int j = i; j < 6; ++j) { - box->z_orders[j] = z_orders[j]; - } - return true; - } - } - return false; -} - -static std::map<int, Box3DSide *> box3d_get_sides(SPBox3D *box) -{ - std::map<int, Box3DSide *> sides; - for (auto& obj: box->children) { - Box3DSide *side = dynamic_cast<Box3DSide *>(&obj); - if (side) { - sides[Box3D::face_to_int(side->getFaceId())] = side; - } - } - sides.erase(-1); - return sides; -} - - -// TODO: Check whether the box is everted in any direction and swap the sides opposite to this direction -void -box3d_set_z_orders (SPBox3D *box) { - // For efficiency reasons, we only set the new z-orders if something really changed - if (box3d_recompute_z_orders (box)) { - std::map<int, Box3DSide *> sides = box3d_get_sides(box); - std::map<int, Box3DSide *>::iterator side; - for (unsigned int i = 0; i < 6; ++i) { - side = sides.find(box->z_orders[i]); - if (side != sides.end()) { - ((*side).second)->lowerToBottom(); - } - } - } -} - -/* - * Auxiliary function for z-order recomputing: - * Determines whether \a pt lies in the sector formed by the two PLs from the corners with IDs - * \a i21 and \a id2 to the VP in direction \a axis. If the VP is infinite, we say that \a pt - * lies in the sector if it lies between the two (parallel) PLs. - * \ret * 0 if \a pt doesn't lie in the sector - * * 1 if \a pt lies in the sector and either VP is finite of VP is infinite and the direction - * from the edge between the two corners to \a pt points towards the VP - * * -1 otherwise - */ -// TODO: Maybe it would be useful to have a similar method for projective points pt because then we -// can use it for VPs and perhaps merge the case distinctions during z-order recomputation. -int -box3d_pt_lies_in_PL_sector (SPBox3D const *box, Geom::Point const &pt, int id1, int id2, Box3D::Axis axis) { - Persp3D *persp = box3d_get_perspective(box); - - // the two corners - Geom::Point c1(box3d_get_corner_screen(box, id1, false)); - Geom::Point c2(box3d_get_corner_screen(box, id2, false)); - - int ret = 0; - if (persp3d_VP_is_finite(persp->perspective_impl, Box3D::toProj(axis))) { - Geom::Point vp(persp3d_get_VP(persp, Box3D::toProj(axis)).affine()); - Geom::Point v1(c1 - vp); - Geom::Point v2(c2 - vp); - Geom::Point w(pt - vp); - ret = static_cast<int>(Box3D::lies_in_sector(v1, v2, w)); - } else { - Box3D::PerspectiveLine pl1(c1, Box3D::toProj(axis), persp); - Box3D::PerspectiveLine pl2(c2, Box3D::toProj(axis), persp); - if (pl1.lie_on_same_side(pt, c2) && pl2.lie_on_same_side(pt, c1)) { - // test whether pt lies "towards" or "away from" the VP - Box3D::Line edge(c1,c2); - Geom::Point c3(box3d_get_corner_screen(box, id1 ^ axis, false)); - if (edge.lie_on_same_side(pt, c3)) { - ret = 1; - } else { - ret = -1; - } - } - } - return ret; -} - -int -box3d_VP_lies_in_PL_sector (SPBox3D const *box, Proj::Axis vpdir, int id1, int id2, Box3D::Axis axis) { - Persp3D *persp = box3d_get_perspective(box); - - if (!persp3d_VP_is_finite(persp->perspective_impl, vpdir)) { - return 0; - } else { - return box3d_pt_lies_in_PL_sector(box, persp3d_get_VP(persp, vpdir).affine(), id1, id2, axis); - } -} - -/* swap the coordinates of corner0 and corner7 along the specified axis */ -static void -box3d_swap_coords(SPBox3D *box, Proj::Axis axis, bool smaller = true) { - box->orig_corner0.normalize(); - box->orig_corner7.normalize(); - if ((box->orig_corner0[axis] < box->orig_corner7[axis]) != smaller) { - double tmp = box->orig_corner0[axis]; - box->orig_corner0[axis] = box->orig_corner7[axis]; - box->orig_corner7[axis] = tmp; - } - // Should we also swap the coordinates of save_corner0 and save_corner7? -} - -/* ensure that the coordinates of corner0 and corner7 are in the correct order (to prevent everted boxes) */ -void -box3d_relabel_corners(SPBox3D *box) { - box3d_swap_coords(box, Proj::X, false); - box3d_swap_coords(box, Proj::Y, false); - box3d_swap_coords(box, Proj::Z, true); -} - -static void -box3d_check_for_swapped_coords(SPBox3D *box, Proj::Axis axis, bool smaller) { - box->orig_corner0.normalize(); - box->orig_corner7.normalize(); - - if ((box->orig_corner0[axis] < box->orig_corner7[axis]) != smaller) { - box->swapped = (Box3D::Axis) (box->swapped | Proj::toAffine(axis)); - } else { - box->swapped = (Box3D::Axis) (box->swapped & ~Proj::toAffine(axis)); - } -} - -static void -box3d_exchange_coords(SPBox3D *box) { - box->orig_corner0.normalize(); - box->orig_corner7.normalize(); - - for (int i = 0; i < 3; ++i) { - if (box->swapped & Box3D::axes[i]) { - double tmp = box->orig_corner0[i]; - box->orig_corner0[i] = box->orig_corner7[i]; - box->orig_corner7[i] = tmp; - } - } -} - -void -box3d_check_for_swapped_coords(SPBox3D *box) { - box3d_check_for_swapped_coords(box, Proj::X, false); - box3d_check_for_swapped_coords(box, Proj::Y, false); - box3d_check_for_swapped_coords(box, Proj::Z, true); - - box3d_exchange_coords(box); -} - -static void box3d_extract_boxes_rec(SPObject *obj, std::list<SPBox3D *> &boxes) { - SPBox3D *box = dynamic_cast<SPBox3D *>(obj); - if (box) { - boxes.push_back(box); - } else if (dynamic_cast<SPGroup *>(obj)) { - for (auto& child: obj->children) { - box3d_extract_boxes_rec(&child, boxes); - } - } -} - -std::list<SPBox3D *> -box3d_extract_boxes(SPObject *obj) { - std::list<SPBox3D *> boxes; - box3d_extract_boxes_rec(obj, boxes); - return boxes; -} - -Persp3D * -box3d_get_perspective(SPBox3D const *box) { - return box->persp_ref->getObject(); -} - -void -box3d_switch_perspectives(SPBox3D *box, Persp3D *old_persp, Persp3D *new_persp, bool recompute_corners) { - if (recompute_corners) { - box->orig_corner0.normalize(); - box->orig_corner7.normalize(); - double z0 = box->orig_corner0[Proj::Z]; - double z7 = box->orig_corner7[Proj::Z]; - Geom::Point corner0_screen = box3d_get_corner_screen(box, 0, false); - Geom::Point corner7_screen = box3d_get_corner_screen(box, 7, false); - - box->orig_corner0 = new_persp->perspective_impl->tmat.preimage(corner0_screen, z0, Proj::Z); - box->orig_corner7 = new_persp->perspective_impl->tmat.preimage(corner7_screen, z7, Proj::Z); - } - - persp3d_remove_box (old_persp, box); - persp3d_add_box (new_persp, box); - - Glib::ustring href = "#"; - href += new_persp->getId(); - box->setAttribute("inkscape:perspectiveID", href.c_str()); -} - -/* Converts the 3D box to an ordinary SPGroup, adds it to the XML tree at the same position as - the original box and deletes the latter */ -SPGroup *box3d_convert_to_group(SPBox3D *box) -{ - SPDocument *doc = box->document; - Inkscape::XML::Document *xml_doc = doc->getReprDoc(); - - // remember position of the box - int pos = box->getPosition(); - - // remember important attributes - gchar const *id = box->getAttribute("id"); - gchar const *style = box->getAttribute("style"); - gchar const *mask = box->getAttribute("mask"); - gchar const *clip_path = box->getAttribute("clip-path"); - - // create a new group and add the sides (converted to ordinary paths) as its children - Inkscape::XML::Node *grepr = xml_doc->createElement("svg:g"); - - for (auto& obj: box->children) { - Box3DSide *side = dynamic_cast<Box3DSide *>(&obj); - if (side) { - Inkscape::XML::Node *repr = box3d_side_convert_to_path(side); - grepr->appendChild(repr); - } else { - g_warning("Non-side item encountered as child of a 3D box."); - } - } - - // add the new group to the box's parent and set remembered position - SPObject *parent = box->parent; - parent->appendChild(grepr); - grepr->setPosition(pos); - grepr->setAttribute("style", style); - if (mask) - grepr->setAttribute("mask", mask); - if (clip_path) - grepr->setAttribute("clip-path", clip_path); - - box->deleteObject(true); - - grepr->setAttribute("id", id); - - SPGroup *group = dynamic_cast<SPGroup *>(doc->getObjectByRepr(grepr)); - g_assert(group != NULL); - return group; -} - -const char *SPBox3D::displayName() const { - return _("3D Box"); -} - -gchar *SPBox3D::description() const { - // We could put more details about the 3d box here - return g_strdup(""); -} - -static inline void -box3d_push_back_corner_pair(SPBox3D const *box, std::list<std::pair<Geom::Point, Geom::Point> > &pts, int c1, int c2) { - pts.push_back(std::make_pair(box3d_get_corner_screen(box, c1, false), - box3d_get_corner_screen(box, c2, false))); -} - -void SPBox3D::convert_to_guides() const { - Inkscape::Preferences *prefs = Inkscape::Preferences::get(); - - if (!prefs->getBool("/tools/shapes/3dbox/convertguides", true)) { - this->convert_to_guides(); - return; - } - - std::list<std::pair<Geom::Point, Geom::Point> > pts; - - /* perspective lines in X direction */ - box3d_push_back_corner_pair(this, pts, 0, 1); - box3d_push_back_corner_pair(this, pts, 2, 3); - box3d_push_back_corner_pair(this, pts, 4, 5); - box3d_push_back_corner_pair(this, pts, 6, 7); - - /* perspective lines in Y direction */ - box3d_push_back_corner_pair(this, pts, 0, 2); - box3d_push_back_corner_pair(this, pts, 1, 3); - box3d_push_back_corner_pair(this, pts, 4, 6); - box3d_push_back_corner_pair(this, pts, 5, 7); - - /* perspective lines in Z direction */ - box3d_push_back_corner_pair(this, pts, 0, 4); - box3d_push_back_corner_pair(this, pts, 1, 5); - box3d_push_back_corner_pair(this, pts, 2, 6); - box3d_push_back_corner_pair(this, pts, 3, 7); - - sp_guide_pt_pairs_to_guides(this->document, pts); -} - -/* - Local Variables: - mode:c++ - c-file-style:"stroustrup" - c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +)) - indent-tabs-mode:nil - fill-column:99 - End: -*/ -// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 : |