/* * 3D box face implementation * * Authors: * Maximilian Albert * Abhishek Sharma * * Copyright (C) 2007 Authors * * Released under GNU GPL, read the file 'COPYING' for more information */ #include "box3d-side.h" #include "document.h" #include "xml/document.h" #include "xml/repr.h" #include "display/curve.h" #include "svg/svg.h" #include "attributes.h" #include "inkscape.h" #include "persp3d.h" #include "box3d-context.h" #include "preferences.h" #include "desktop-style.h" #include "box3d.h" struct SPPathClass; static void box3d_side_class_init (Box3DSideClass *klass); static void box3d_side_init (Box3DSide *side); static void box3d_side_build (SPObject *object, SPDocument *document, Inkscape::XML::Node *repr); static Inkscape::XML::Node *box3d_side_write (SPObject *object, Inkscape::XML::Document *doc, Inkscape::XML::Node *repr, guint flags); static void box3d_side_set (SPObject *object, unsigned int key, const gchar *value); static void box3d_side_update (SPObject *object, SPCtx *ctx, guint flags); static void box3d_side_set_shape (SPShape *shape); static void box3d_side_compute_corner_ids(Box3DSide *side, unsigned int corners[4]); static SPShapeClass *parent_class; GType box3d_side_get_type (void) { static GType type = 0; if (!type) { GTypeInfo info = { sizeof (Box3DSideClass), NULL, NULL, (GClassInitFunc) box3d_side_class_init, NULL, NULL, sizeof (Box3DSide), 16, (GInstanceInitFunc) box3d_side_init, NULL, /* value_table */ }; type = g_type_register_static (SP_TYPE_SHAPE, "Box3DSide", &info, (GTypeFlags)0); } return type; } static void box3d_side_class_init(Box3DSideClass *klass) { SPObjectClass *sp_object_class = reinterpret_cast(klass); SPShapeClass *shape_class = reinterpret_cast(klass); parent_class = SP_SHAPE_CLASS(g_type_class_ref (SP_TYPE_SHAPE)); sp_object_class->build = box3d_side_build; sp_object_class->write = box3d_side_write; sp_object_class->set = box3d_side_set; sp_object_class->update = box3d_side_update; shape_class->set_shape = box3d_side_set_shape; } static void box3d_side_init (Box3DSide * side) { side->dir1 = Box3D::NONE; side->dir2 = Box3D::NONE; side->front_or_rear = Box3D::FRONT; } static void box3d_side_build(SPObject * object, SPDocument * document, Inkscape::XML::Node * repr) { if ((SP_OBJECT_CLASS(parent_class))->build) { (SP_OBJECT_CLASS(parent_class))->build(object, document, repr); } object->readAttr( "inkscape:box3dsidetype" ); } static Inkscape::XML::Node * box3d_side_write (SPObject *object, Inkscape::XML::Document *xml_doc, Inkscape::XML::Node *repr, guint flags) { Box3DSide *side = SP_BOX3D_SIDE (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:path repr = xml_doc->createElement("svg:path"); } if (flags & SP_OBJECT_WRITE_EXT) { sp_repr_set_int(repr, "inkscape:box3dsidetype", side->dir1 ^ side->dir2 ^ side->front_or_rear); } static_cast(object)->setShape(); /* Duplicate the path */ SPCurve const *curve = (SP_SHAPE(object))->_curve; //Nulls might be possible if this called iteratively if ( !curve ) { return NULL; } char *d = sp_svg_write_path ( curve->get_pathvector() ); repr->setAttribute("d", d); g_free (d); if ((SP_OBJECT_CLASS(parent_class))->write) (SP_OBJECT_CLASS(parent_class))->write (object, xml_doc, repr, flags); return repr; } static void box3d_side_set (SPObject *object, unsigned int key, const gchar *value) { Box3DSide *side = SP_BOX3D_SIDE (object); // TODO: In case the box was recreated (by undo, e.g.) we need to recreate the path // (along with other info?) from the parent box. /* fixme: we should really collect updates */ switch (key) { case SP_ATTR_INKSCAPE_BOX3D_SIDE_TYPE: if (value) { guint desc = atoi (value); if (!Box3D::is_face_id(desc)) { g_print ("desc is not a face id: =%s=\n", value); } g_return_if_fail (Box3D::is_face_id (desc)); Box3D::Axis plane = (Box3D::Axis) (desc & 0x7); plane = (Box3D::is_plane(plane) ? plane : Box3D::orth_plane_or_axis(plane)); side->dir1 = Box3D::extract_first_axis_direction(plane); side->dir2 = Box3D::extract_second_axis_direction(plane); side->front_or_rear = (Box3D::FrontOrRear) (desc & 0x8); object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG); } break; default: if ((SP_OBJECT_CLASS(parent_class))->set) (SP_OBJECT_CLASS(parent_class))->set (object, key, value); break; } } static void box3d_side_update (SPObject *object, SPCtx *ctx, guint flags) { if (flags & (SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG | SP_OBJECT_VIEWPORT_MODIFIED_FLAG)) { flags &= ~SP_OBJECT_USER_MODIFIED_FLAG_B; // since we change the description, it's not a "just translation" anymore } if (flags & (SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG | SP_OBJECT_VIEWPORT_MODIFIED_FLAG)) { static_cast(object)->setShape (); } if ((SP_OBJECT_CLASS(parent_class))->update) (SP_OBJECT_CLASS(parent_class))->update (object, ctx, flags); } /* Create a new Box3DSide and append it to the parent box */ Box3DSide * Box3DSide::createBox3DSide(SPBox3D *box) { Box3DSide *box3d_side = 0; Inkscape::XML::Document *xml_doc = box->document->rdoc; Inkscape::XML::Node *repr_side = xml_doc->createElement("svg:path"); repr_side->setAttribute("sodipodi:type", "inkscape:box3dside"); box3d_side = static_cast(box->appendChildRepr(repr_side)); return box3d_side; } /* * Function which return the type attribute for Box3D. * Acts as a replacement for directly accessing the XML Tree directly. */ int Box3DSide::getFaceId() { return this->getIntAttribute("inkscape:box3dsidetype", -1); } void box3d_side_position_set (Box3DSide *side) { box3d_side_set_shape (SP_SHAPE (side)); // This call is responsible for live update of the sides during the initial drag side->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG); } void box3d_side_set_shape (SPShape *shape) { Box3DSide *side = SP_BOX3D_SIDE (shape); if (!side->document->getRoot()) { // avoid a warning caused by sp_document_height() (which is called from sp_item_i2d_affine() below) // when reading a file containing 3D boxes return; } SPObject *parent = side->parent; if (!SP_IS_BOX3D(parent)) { g_warning ("Parent of 3D box side is not a 3D box.\n"); return; } SPBox3D *box = SP_BOX3D(parent); Persp3D *persp = box3d_side_perspective(side); if (!persp) { return; } // TODO: Draw the correct quadrangle here // To do this, determine the perspective of the box, the orientation of the side (e.g., XY-FRONT) // compute the coordinates of the corners in P^3, project them onto the canvas, and draw the // resulting path. unsigned int corners[4]; box3d_side_compute_corner_ids(side, corners); SPCurve *c = new SPCurve(); if (!box3d_get_corner_screen(box, corners[0]).isFinite() || !box3d_get_corner_screen(box, corners[1]).isFinite() || !box3d_get_corner_screen(box, corners[2]).isFinite() || !box3d_get_corner_screen(box, corners[3]).isFinite() ) { g_warning ("Trying to draw a 3D box side with invalid coordinates.\n"); return; } c->moveto(box3d_get_corner_screen(box, corners[0])); c->lineto(box3d_get_corner_screen(box, corners[1])); c->lineto(box3d_get_corner_screen(box, corners[2])); c->lineto(box3d_get_corner_screen(box, corners[3])); c->closepath(); /* Reset the shape'scurve to the "original_curve" * This is very important for LPEs to work properly! (the bbox might be recalculated depending on the curve in shape)*/ shape->setCurveInsync( c, TRUE); if (sp_lpe_item_has_path_effect(SP_LPE_ITEM(shape)) && sp_lpe_item_path_effects_enabled(SP_LPE_ITEM(shape))) { SPCurve *c_lpe = c->copy(); bool success = sp_lpe_item_perform_path_effect(SP_LPE_ITEM (shape), c_lpe); if (success) { shape->setCurveInsync( c_lpe, TRUE); } c_lpe->unref(); } c->unref(); } gchar *box3d_side_axes_string(Box3DSide *side) { GString *pstring = g_string_new(""); g_string_printf (pstring, "%s", Box3D::string_from_axes ((Box3D::Axis) (side->dir1 ^ side->dir2))); switch ((Box3D::Axis) (side->dir1 ^ side->dir2)) { case Box3D::XY: g_string_append_printf (pstring, (side->front_or_rear == Box3D::FRONT) ? "front" : "rear"); break; case Box3D::XZ: g_string_append_printf (pstring, (side->front_or_rear == Box3D::FRONT) ? "top" : "bottom"); break; case Box3D::YZ: g_string_append_printf (pstring, (side->front_or_rear == Box3D::FRONT) ? "right" : "left"); break; default: break; } return pstring->str; } static void box3d_side_compute_corner_ids(Box3DSide *side, unsigned int corners[4]) { Box3D::Axis orth = Box3D::third_axis_direction (side->dir1, side->dir2); corners[0] = (side->front_or_rear ? orth : 0); corners[1] = corners[0] ^ side->dir1; corners[2] = corners[0] ^ side->dir1 ^ side->dir2; corners[3] = corners[0] ^ side->dir2; } Persp3D * box3d_side_perspective(Box3DSide *side) { return SP_BOX3D(side->parent)->persp_ref->getObject(); } Inkscape::XML::Node *box3d_side_convert_to_path(Box3DSide *side) { // TODO: Copy over all important attributes (see sp_selected_item_to_curved_repr() for an example) SPDocument *doc = side->document; Inkscape::XML::Document *xml_doc = doc->getReprDoc(); Inkscape::XML::Node *repr = xml_doc->createElement("svg:path"); repr->setAttribute("d", side->getAttribute("d")); repr->setAttribute("style", side->getAttribute("style")); return repr; } /* 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:fileencoding=utf-8:textwidth=99 :