void create_canvas_line(Geom::Point const &p1, Geom::Point const &p2, guint32 rgba)
{
SPDesktop *desktop = inkscape_active_desktop();
SPCtrlLine *line = ControlManager::getManager().createControlLine(sp_desktop_controls(desktop), p1, p2);
line->setRgba32(rgba);
sp_canvas_item_show(line);
}
VPDrag::VPDrag (SPDocument *document)
{
this->document = document;
this->selection = sp_desktop_selection(inkscape_active_desktop());
this->draggers = NULL;
this->lines = NULL;
this->show_lines = true;
this->front_or_rear_lines = 0x1;
this->dragging = false;
this->sel_changed_connection = this->selection->connectChanged(
sigc::bind (
sigc::ptr_fun(&vp_drag_sel_changed),
(gpointer)this )
);
this->sel_modified_connection = this->selection->connectModified(
sigc::bind(
sigc::ptr_fun(&vp_drag_sel_modified),
(gpointer)this )
);
this->updateDraggers ();
this->updateLines ();
}
VPDragger::VPDragger(VPDrag *parent, Geom::Point p, VanishingPoint &vp)
{
this->parent = parent;
this->point = p;
this->point_original = p;
this->dragging_started = false;
if (vp.is_finite()) {
// create the knot
this->knot = sp_knot_new (inkscape_active_desktop(), NULL);
this->knot->setMode(SP_KNOT_MODE_XOR);
this->knot->setFill(VP_KNOT_COLOR_NORMAL, VP_KNOT_COLOR_NORMAL, VP_KNOT_COLOR_NORMAL);
this->knot->setStroke(0x000000ff, 0x000000ff, 0x000000ff);
sp_knot_update_ctrl(this->knot);
// move knot to the given point
sp_knot_set_position (this->knot, this->point, SP_KNOT_STATE_NORMAL);
sp_knot_show (this->knot);
// connect knot's signals
g_signal_connect (G_OBJECT (this->knot), "moved", G_CALLBACK (vp_knot_moved_handler), this);
g_signal_connect (G_OBJECT (this->knot), "grabbed", G_CALLBACK (vp_knot_grabbed_handler), this);
g_signal_connect (G_OBJECT (this->knot), "ungrabbed", G_CALLBACK (vp_knot_ungrabbed_handler), this);
// add the initial VP (which may be NULL!)
this->addVP (vp);
}
}
/**
Create a line from p1 to p2 and add it to the lines list
*/
void
VPDrag::addLine (Geom::Point p1, Geom::Point p2, guint32 rgba)
{
SPCanvasItem *line = sp_canvas_item_new(sp_desktop_controls(inkscape_active_desktop()), SP_TYPE_CTRLLINE, NULL);
sp_ctrlline_set_coords(SP_CTRLLINE(line), p1, p2);
if (rgba != VP_LINE_COLOR_FILL) // fill is the default, so don't set color for it to speed up redraw
sp_ctrlline_set_rgba32 (SP_CTRLLINE(line), rgba);
sp_canvas_item_show (line);
this->lines = g_slist_append (this->lines, line);
}
void create_canvas_point(Geom::Point const &pos, double size, guint32 rgba)
{
SPDesktop *desktop = inkscape_active_desktop();
SPCanvasItem * canvas_pt = sp_canvas_item_new(sp_desktop_controls(desktop), SP_TYPE_CTRL,
"size", size,
"filled", 1,
"fill_color", rgba,
"stroked", 1,
"stroke_color", 0x000000ff,
NULL);
SP_CTRL(canvas_pt)->moveto(pos);
}
std::set<VanishingPoint*, less_ptr>
VPDragger::VPsOfSelectedBoxes() {
std::set<VanishingPoint*, less_ptr> sel_vps;
VanishingPoint *vp;
// FIXME: Should we take the selection from the parent VPDrag? I guess it shouldn't make a difference.
Inkscape::Selection *sel = sp_desktop_selection(inkscape_active_desktop());
for (GSList const* i = sel->itemList(); i != NULL; i = i->next) {
if (!SP_IS_BOX3D(i->data))
continue;
SPBox3D *box = SP_BOX3D(i->data);
vp = this->findVPWithBox(box);
if (vp) {
sel_vps.insert (vp);
}
}
return sel_vps;
}
static void
vp_knot_moved_handler (SPKnot */*knot*/, Geom::Point const *ppointer, guint state, gpointer data)
{
VPDragger *dragger = (VPDragger *) data;
VPDrag *drag = dragger->parent;
Geom::Point p = *ppointer;
// FIXME: take from prefs
double snap_dist = SNAP_DIST / inkscape_active_desktop()->current_zoom();
/*
* We use dragging_started to indicate if we have already checked for the need to split Draggers up.
* This only has the purpose of avoiding costly checks in the routine below.
*/
if (!dragger->dragging_started && (state & GDK_SHIFT_MASK)) {
/* with Shift; if there is more than one box linked to this VP
we need to split it and create a new perspective */
if (dragger->numberOfBoxes() > 1) { // FIXME: Don't do anything if *all* boxes of a VP are selected
std::set<VanishingPoint*, less_ptr> sel_vps = dragger->VPsOfSelectedBoxes();
std::list<SPBox3D *> sel_boxes;
for (std::set<VanishingPoint*, less_ptr>::iterator vp = sel_vps.begin(); vp != sel_vps.end(); ++vp) {
// for each VP that has selected boxes:
Persp3D *old_persp = (*vp)->get_perspective();
sel_boxes = (*vp)->selectedBoxes(sp_desktop_selection(inkscape_active_desktop()));
// we create a new perspective ...
Persp3D *new_persp = persp3d_create_xml_element (dragger->parent->document, old_persp);
/* ... unlink the boxes from the old one and
FIXME: We need to unlink the _un_selected boxes of each VP so that
the correct boxes are kept with the VP being moved */
std::list<SPBox3D *> bx_lst = persp3d_list_of_boxes(old_persp);
for (std::list<SPBox3D *>::iterator i = bx_lst.begin(); i != bx_lst.end(); ++i) {
if (std::find(sel_boxes.begin(), sel_boxes.end(), *i) == sel_boxes.end()) {
/* if a box in the VP is unselected, move it to the
newly created perspective so that it doesn't get dragged **/
box3d_switch_perspectives(*i, old_persp, new_persp);
}
}
}
// FIXME: Do we need to create a new dragger as well?
dragger->updateZOrders ();
sp_document_done (sp_desktop_document (inkscape_active_desktop()), SP_VERB_CONTEXT_3DBOX,
_("Split vanishing points"));
return;
}
}
if (!(state & GDK_SHIFT_MASK)) {
// without Shift; see if we need to snap to another dragger
for (GList *di = dragger->parent->draggers; di != NULL; di = di->next) {
VPDragger *d_new = (VPDragger *) di->data;
if ((d_new != dragger) && (Geom::L2 (d_new->point - p) < snap_dist)) {
if (have_VPs_of_same_perspective (dragger, d_new)) {
// this would result in degenerate boxes, which we disallow for the time being
continue;
}
// update positions ... (this is needed so that the perspectives are detected as identical)
// FIXME: This is called a bit too often, isn't it?
for (std::list<VanishingPoint>::iterator j = dragger->vps.begin(); j != dragger->vps.end(); ++j) {
(*j).set_pos(d_new->point);
}
// ... join lists of VPs ...
d_new->vps.merge(dragger->vps);
// ... delete old dragger ...
drag->draggers = g_list_remove (drag->draggers, dragger);
delete dragger;
dragger = NULL;
// ... and merge any duplicate perspectives
d_new->mergePerspectives();
// TODO: Update the new merged dragger
d_new->updateTip();
d_new->parent->updateBoxDisplays (); // FIXME: Only update boxes in current dragger!
d_new->updateZOrders ();
drag->updateLines ();
// TODO: Undo machinery; this doesn't work yet because perspectives must be created and
// deleted according to changes in the svg representation, not based on any user input
// as is currently the case.
sp_document_done (sp_desktop_document (inkscape_active_desktop()), SP_VERB_CONTEXT_3DBOX,
_("Merge vanishing points"));
return;
}
}
}
dragger->point = p; // FIXME: Brauchen wir dragger->point überhaupt?
dragger->updateVPs(p);
dragger->updateBoxDisplays();
dragger->parent->updateBoxHandles (); // FIXME: Only update the handles of boxes on this dragger (not on all)
dragger->updateZOrders();
drag->updateLines();
dragger->dragging_started = true;
}
/**
* Depending on the value of all_lines, draw the front and/or rear perspective lines starting from the given corners.
*/
void
VPDrag::drawLinesForFace (const SPBox3D *box, Proj::Axis axis) //, guint corner1, guint corner2, guint corner3, guint corner4)
{
guint color;
switch (axis) {
// TODO: Make color selectable by user
case Proj::X: color = VP_LINE_COLOR_STROKE_X; break;
case Proj::Y: color = VP_LINE_COLOR_STROKE_Y; break;
case Proj::Z: color = VP_LINE_COLOR_STROKE_Z; break;
default: g_assert_not_reached();
}
Geom::Point corner1, corner2, corner3, corner4;
box3d_corners_for_PLs (box, axis, corner1, corner2, corner3, corner4);
g_return_if_fail (box3d_get_perspective(box));
Proj::Pt2 vp = persp3d_get_VP (box3d_get_perspective(box), axis);
if (vp.is_finite()) {
// draw perspective lines for finite VPs
Geom::Point pt = vp.affine();
if (this->front_or_rear_lines & 0x1) {
// draw 'front' perspective lines
this->addLine (corner1, pt, color);
this->addLine (corner2, pt, color);
}
if (this->front_or_rear_lines & 0x2) {
// draw 'rear' perspective lines
this->addLine (corner3, pt, color);
this->addLine (corner4, pt, color);
}
} else {
// draw perspective lines for infinite VPs
boost::optional<Geom::Point> pt1, pt2, pt3, pt4;
Persp3D *persp = box3d_get_perspective(box);
SPDesktop *desktop = inkscape_active_desktop (); // FIXME: Store the desktop in VPDrag
Box3D::PerspectiveLine pl (corner1, axis, persp);
pt1 = pl.intersection_with_viewbox(desktop);
pl = Box3D::PerspectiveLine (corner2, axis, persp);
pt2 = pl.intersection_with_viewbox(desktop);
pl = Box3D::PerspectiveLine (corner3, axis, persp);
pt3 = pl.intersection_with_viewbox(desktop);
pl = Box3D::PerspectiveLine (corner4, axis, persp);
pt4 = pl.intersection_with_viewbox(desktop);
if (!pt1 || !pt2 || !pt3 || !pt4) {
// some perspective lines s are outside the canvas; currently we don't draw any of them
return;
}
if (this->front_or_rear_lines & 0x1) {
// draw 'front' perspective lines
this->addLine (corner1, *pt1, color);
this->addLine (corner2, *pt2, color);
}
if (this->front_or_rear_lines & 0x2) {
// draw 'rear' perspective lines
this->addLine (corner3, *pt3, color);
this->addLine (corner4, *pt4, color);
}
}
}
