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-rw-r--r--src/perspective3d.cpp453
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diff --git a/src/perspective3d.cpp b/src/perspective3d.cpp
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--- a/src/perspective3d.cpp
+++ /dev/null
@@ -1,453 +0,0 @@
-#define __PERSPECTIVE3D_C__
-
-/*
- * Class modelling a 3D perspective
- *
- * Authors:
- * Maximilian Albert <Anhalter42@gmx.de>
- *
- * Copyright (C) 2007 authors
- *
- * Released under GNU GPL, read the file 'COPYING' for more information
- */
-
-#include "box3d.h"
-#include "box3d-context.h"
-#include "perspective-line.h"
-#include <iostream>
-#include "perspective3d.h"
-#include "desktop-handles.h"
-
-// can probably be removed later
-#include "inkscape.h"
-
-namespace Box3D {
-
-gint Perspective3D::counter = 0;
-
-/**
- * Computes the intersection of the two perspective lines from pt1 and pt2 to the respective
- * vanishing points in the given directions.
- */
-// FIXME: This has been moved to a virtual method inside PerspectiveLine; can probably be purged
-NR::Point
-perspective_intersection (NR::Point pt1, Box3D::Axis dir1, NR::Point pt2, Box3D::Axis dir2, Perspective3D *persp)
-{
- VanishingPoint const *vp1 = persp->get_vanishing_point(dir1);
- VanishingPoint const *vp2 = persp->get_vanishing_point(dir2);
- NR::Maybe<NR::Point> meet = Line(pt1, *vp1).intersect(Line(pt2, *vp2));
- // FIXME: How to handle parallel lines (also depends on the type of the VPs)?
- if (!meet) { meet = NR::Point (0.0, 0.0); }
- return *meet;
-}
-
-/**
- * Find the point on the perspective line from line_pt to the
- * vanishing point in direction dir that is closest to ext_pt.
- */
-NR::Point
-perspective_line_snap (NR::Point line_pt, Box3D::Axis dir, NR::Point ext_pt, Perspective3D *persp)
-{
- return PerspectiveLine(line_pt, dir, persp).closest_to(ext_pt);
-}
-
-Perspective3D::Perspective3D (VanishingPoint const &pt_x, VanishingPoint const &pt_y, VanishingPoint const &pt_z, SPDocument *doc)
- : boxes (NULL),
- document (doc)
-{
- vp_x = new VanishingPoint (pt_x);
- vp_y = new VanishingPoint (pt_y);
- vp_z = new VanishingPoint (pt_z);
-
- my_counter = Perspective3D::counter++;
-
- if (document == NULL) {
- g_warning ("What to do now?\n");
- }
-}
-
-Perspective3D::Perspective3D (Perspective3D &other)
- : boxes (NULL) // Should we add an option to copy the list of boxes?
-{
- vp_x = new VanishingPoint (*other.vp_x);
- vp_y = new VanishingPoint (*other.vp_y);
- vp_z = new VanishingPoint (*other.vp_z);
-
- my_counter = Perspective3D::counter++;
-
- document = other.document;
-}
-
-Perspective3D::~Perspective3D ()
-{
- if (document) {
- document->remove_perspective (this);
- } else {
- g_warning ("No document found!\n");
- }
-
- // Remove the VPs from their draggers
- SPEventContext *ec = inkscape_active_event_context();
- if (SP_IS_3DBOX_CONTEXT (ec)) {
- SP3DBoxContext *bc = SP_3DBOX_CONTEXT (ec);
- // we need to check if there are any draggers because the selection
- // is temporarily empty during duplication of boxes, e.g.
- if (bc->_vpdrag->draggers != NULL) {
- /***
- g_assert (bc->_vpdrag->getDraggerFor (*vp_x) != NULL);
- g_assert (bc->_vpdrag->getDraggerFor (*vp_y) != NULL);
- g_assert (bc->_vpdrag->getDraggerFor (*vp_z) != NULL);
- bc->_vpdrag->getDraggerFor (*vp_x)->removeVP (vp_x);
- bc->_vpdrag->getDraggerFor (*vp_y)->removeVP (vp_y);
- bc->_vpdrag->getDraggerFor (*vp_z)->removeVP (vp_z);
- ***/
- // TODO: the temporary perspective created when building boxes is not linked to any dragger, hence
- // we need to do the following checks. Maybe it would be better to not create a temporary
- // perspective at all but simply compare the VPs manually in sp_3dbox_build.
- VPDragger * dragger;
- dragger = bc->_vpdrag->getDraggerFor (*vp_x);
- if (dragger)
- dragger->removeVP (vp_x);
- dragger = bc->_vpdrag->getDraggerFor (*vp_y);
- if (dragger)
- dragger->removeVP (vp_y);
- dragger = bc->_vpdrag->getDraggerFor (*vp_z);
- if (dragger)
- dragger->removeVP (vp_z);
- }
- }
-
- delete vp_x;
- delete vp_y;
- delete vp_z;
-
- g_slist_free (boxes);
-}
-
-bool
-Perspective3D::operator==(Perspective3D const &other) const
-{
- // Two perspectives are equal iff their vanishing points coincide and have identical states
- return (*vp_x == *other.vp_x && *vp_y == *other.vp_y && *vp_z == *other.vp_z);
-}
-
-bool
-Perspective3D::has_vanishing_point (VanishingPoint *vp)
-{
- return (vp == vp_x || vp == vp_y || vp == vp_z);
-}
-
-VanishingPoint *
-Perspective3D::get_vanishing_point (Box3D::Axis const dir)
-{
- switch (dir) {
- case X:
- return vp_x;
- break;
- case Y:
- return vp_y;
- break;
- case Z:
- return vp_z;
- break;
- case NONE:
- g_warning ("Axis direction must be specified. As a workaround we return the VP in X direction.\n");
- return vp_x;
- break;
- default:
- g_warning ("Single axis direction needed to determine corresponding vanishing point.\n");
- return get_vanishing_point (extract_first_axis_direction(dir));
- break;
- }
-}
-
-void
-Perspective3D::set_vanishing_point (Box3D::Axis const dir, VanishingPoint const &pt)
-{
- switch (dir) {
- case X:
- (*vp_x) = pt;
- break;
- case Y:
- (*vp_y) = pt;
- break;
- case Z:
- (*vp_z) = pt;
- break;
- default:
- // no vanishing point to set
- break;
- }
-}
-
-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);
- 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();
-}
-
-void
-Perspective3D::rotate (Box3D::Axis const axis, double const angle, bool const alt_pressed)
-{
- Box3D::VanishingPoint *vp = get_vanishing_point (axis);
- if (!vp->is_finite()) {
- //double add_value = angle;
- double a = NR::atan2 (vp->v_dir) * 180/M_PI;
- a += alt_pressed ? 0.5 * ((angle > 0 ) - (angle < 0)) : angle; // the r.h.s. yields +/-0.5 or angle
- a *= M_PI/180;
- this->set_infinite_direction (axis, NR::Point (cos (a), sin (a)));
- }
-}
-
-Axis
-Perspective3D::get_axis_of_VP (VanishingPoint *vp)
-{
- if (vp == vp_x) return X;
- if (vp == vp_y) return Y;
- if (vp == vp_z) return Z;
-
- g_warning ("Vanishing point not present in the perspective.\n");
- return NONE;
-}
-
-void
-Perspective3D::set_vanishing_point (Box3D::Axis const dir, gdouble pt_x, gdouble pt_y, gdouble dir_x, gdouble dir_y, VPState st)
-{
- VanishingPoint *vp;
- switch (dir) {
- case X:
- vp = vp_x;
- break;
- case Y:
- vp = vp_y;
- break;
- case Z:
- vp = vp_z;
- break;
- default:
- // no vanishing point to set
- return;
- }
-
- vp->set_pos (pt_x, pt_y);
- vp->v_dir = NR::Point (dir_x, dir_y);
- vp->state = st;
-}
-
-void
-Perspective3D::add_box (SP3DBox *box)
-{
- if (g_slist_find (this->boxes, box) != NULL) {
- // Don't add the same box twice
- g_warning ("Box already uses the current perspective. We don't add it again.\n");
- return;
- }
- this->boxes = g_slist_append (this->boxes, box);
-}
-
-void
-Perspective3D::remove_box (const SP3DBox *box)
-{
- if (!g_slist_find (this->boxes, box)) {
- g_warning ("Could not find box that is to be removed in the current perspective.\n");
- }
- this->boxes = g_slist_remove (this->boxes, box);
-}
-
-bool
-Perspective3D::has_box (const SP3DBox *box) const
-{
- return (g_slist_find (this->boxes, box) != NULL);
-}
-
-bool
-Perspective3D::all_boxes_occur_in_list (GSList *boxes_to_do)
-{
- for (GSList *i = boxes; i != NULL; i = i->next) {
- if (!g_slist_find (boxes_to_do, i->data)) {
- return false;
- }
- }
- return true;
-}
-
-GSList *
-Perspective3D::boxes_occurring_in_list (GSList * list_of_boxes)
-{
- GSList * result = NULL;
- for (GSList *i = list_of_boxes; i != NULL; i = i->next) {
- if (this->has_box (SP_3DBOX (i->data))) {
- result = g_slist_prepend (result, i->data);
- }
- }
- // we reverse so as to retain the same order as in list_of_boxes
- return g_slist_reverse (result);
-}
-
-/**
- * Update the shape of a box after a handle was dragged or a VP was changed, according to the stored ratios.
- */
-void
-Perspective3D::reshape_boxes (Box3D::Axis axes)
-{
- // TODO: Leave the "correct" corner fixed according to which face is supposed to be on front.
- NR::Point new_pt;
- VanishingPoint *vp;
- for (const GSList *i = this->boxes; i != NULL; i = i->next) {
- SP3DBox *box = SP_3DBOX (i->data);
- if (axes & Box3D::X) {
- vp = this->get_vanishing_point (Box3D::X);
- if (vp->is_finite()) {
- new_pt = vp->get_pos() + box->ratio_x * (box->corners[3] - vp->get_pos());
- sp_3dbox_move_corner_in_XY_plane (box, 2, new_pt);
- }
- }
- if (axes & Box3D::Y) {
- vp = this->get_vanishing_point (Box3D::Y);
- if (vp->is_finite()) {
- new_pt = vp->get_pos() + box->ratio_y * (box->corners[0] - vp->get_pos());
- sp_3dbox_move_corner_in_XY_plane (box, 2, new_pt);
- }
- }
- if (axes & Box3D::Z) {
- vp = this->get_vanishing_point (Box3D::Z);
- if (vp->is_finite()) {
- new_pt = vp->get_pos() + box->ratio_z * (box->corners[0] - vp->get_pos());
- sp_3dbox_move_corner_in_Z_direction (box, 4, new_pt);
- }
- }
-
- sp_3dbox_set_shape (box, true);
- }
-}
-
-void
-Perspective3D::toggle_boxes (Box3D::Axis axis)
-{
- get_vanishing_point (axis)->toggle_parallel();
- for (GSList *i = this->boxes; i != NULL; i = i->next) {
- sp_3dbox_reshape_after_VP_toggling (SP_3DBOX (i->data), axis);
- }
- update_box_reprs();
-
- SP3DBoxContext *bc = SP_3DBOX_CONTEXT (inkscape_active_event_context());
- bc->_vpdrag->updateDraggers ();
-}
-
-void
-Perspective3D::update_box_reprs ()
-{
- for (GSList *i = this->boxes; i != NULL; i = i->next) {
- SP_OBJECT(SP_3DBOX (i->data))->updateRepr(SP_OBJECT_WRITE_EXT);
- }
-}
-
-void
-Perspective3D::update_z_orders ()
-{
- for (GSList *i = this->boxes; i != NULL; i = i->next) {
- sp_3dbox_set_z_orders_later_on (SP_3DBOX (i->data));
- }
-}
-
-/* the direction from a point pt towards the specified vanishing point of the perspective */
-NR::Point
-Perspective3D::direction (NR::Point pt, Box3D::Axis axis)
-{
- Box3D::VanishingPoint *vp = this->get_vanishing_point (axis);
- if (!vp->is_finite()) {
- return vp->v_dir;
- }
- return (vp->get_pos() - pt);
-}
-
-// swallow the list of boxes from the other perspective and delete it
-void
-Perspective3D::absorb (Perspective3D *other)
-{
- g_return_if_fail (*this == *other);
-
- // FIXME: Is copying necessary? Is other->boxes invalidated when other is deleted below?
- this->boxes = g_slist_concat (this->boxes, g_slist_copy (other->boxes));
-
- // Should we delete the other perspective here or at the place from where absorb() is called?
- delete other;
- other = NULL;
-}
-
-// FIXME: We get compiler errors when we try to move the code from sp_3dbox_get_perspective_string to this function
-/***
-gchar *
-Perspective3D::svg_string ()
-{
-}
-***/
-
-void
-Perspective3D::print_debugging_info ()
-{
- g_print ("====================================================\n");
- for (GSList *i = sp_desktop_document (inkscape_active_desktop())->perspectives; i != NULL; i = i->next) {
- Perspective3D *persp = (Perspective3D *) i->data;
- g_print ("Perspective %d:\n", persp->my_counter);
-
- VanishingPoint * vp = persp->get_vanishing_point(Box3D::X);
- g_print (" VP X: (%f,%f) ", (*vp)[NR::X], (*vp)[NR::Y]);
- g_print ((vp->is_finite()) ? "(finite)\n" : "(infinite)\n");
-
- vp = persp->get_vanishing_point(Box3D::Y);
- g_print (" VP Y: (%f,%f) ", (*vp)[NR::X], (*vp)[NR::Y]);
- g_print ((vp->is_finite()) ? "(finite)\n" : "(infinite)\n");
-
- vp = persp->get_vanishing_point(Box3D::Z);
- g_print (" VP Z: (%f,%f) ", (*vp)[NR::X], (*vp)[NR::Y]);
- g_print ((vp->is_finite()) ? "(finite)\n" : "(infinite)\n");
-
- g_print ("\nBoxes: ");
- if (persp->boxes == NULL) {
- g_print ("none");
- } else {
- GSList *j;
- for (j = persp->boxes; j != NULL; j = j->next) {
- if (j->next == NULL) break;
- g_print ("%d, ", SP_3DBOX (j->data)->my_counter);
- }
- if (j != NULL) {
- g_print ("%d", SP_3DBOX (j->data)->my_counter);
- }
- g_print ("\n");
- }
- g_print ("\n");
- }
- g_print ("====================================================\n");
-}
-
-} // namespace Box3D
-
-/*
- 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:encoding=utf-8:textwidth=99 :
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