7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4Nick#define INKSCAPE_LPE_MIRROR_SYMMETRY_CPP

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4Nick

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4Nick#include "live_effects/lpe-mirror_symmetry.h"

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4Nick#include <sp-path.h>

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4Nick#include <display/curve.h>

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4Nick#include <svg/path-string.h>

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4Nick

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4Nick#include <2geom/path.h>

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4Nick#include <2geom/transforms.h>

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4Nick#include <2geom/matrix.h>

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4Nick

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4Nicknamespace Inkscape {

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4Nicknamespace LivePathEffect {

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4Nick

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4NickLPEMirrorSymmetry::LPEMirrorSymmetry(LivePathEffectObject *lpeobject) :

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4Nick Effect(lpeobject),

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4Nick discard_orig_path(_("Discard original path?"), _("Check this to only keep the mirrored part of the path"), "discard_orig_path", &wr, this, false),

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4Nick reflection_line(_("Reflection line"), _("Line which serves as 'mirror' for the reflection"), "reflection_line", &wr, this, "M0,0 L100,100")

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4Nick{

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4Nick show_orig_path = true;

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4Nick

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4Nick registerParameter( dynamic_cast<Parameter *>(&discard_orig_path) );

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4Nick registerParameter( dynamic_cast<Parameter *>(&reflection_line) );

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4Nick}

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4Nick

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4NickLPEMirrorSymmetry::~LPEMirrorSymmetry()

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4Nick{

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4Nick}

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4Nick

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4NickLPEMirrorSymmetry::doOnApply (SPLPEItem *lpeitem)

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4Nick{

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4Nick using namespace Geom;

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4Nick

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4Nick SPItem *item = SP_ITEM(lpeitem);

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4Nick Geom::Matrix t = sp_item_i2d_affine(item);

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4Nick Geom::Rect bbox = *item->getBounds(t); // fixme: what happens if getBounds does not return a valid rect?

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4Nick

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4Nick Point A(bbox.left(), bbox.bottom());

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4Nick Point B(bbox.left(), bbox.top());

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4Nick A *= t;

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4Nick B *= t;

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4Nick Piecewise<D2<SBasis> > rline = Piecewise<D2<SBasis> >(D2<SBasis>(Linear(A[X], B[X]), Linear(A[Y], B[Y])));

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4Nick reflection_line.set_new_value(rline, true);

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4Nick}

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4Nick

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4Nickstd::vector<Geom::Path>

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4NickLPEMirrorSymmetry::doEffect_path (std::vector<Geom::Path> const & path_in)

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4Nick{

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4Nick std::vector<Geom::Path> path_out;

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4Nick if (!discard_orig_path) {

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4Nick path_out = path_in;

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4Nick }

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4Nick

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4Nick std::vector<Geom::Path> mline(reflection_line.get_pathvector());

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4Nick Geom::Point A(mline.front().initialPoint());

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4Nick Geom::Point B(mline.back().finalPoint());

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4Nick

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4Nick Geom::Matrix m1(1.0, 0.0, 0.0, 1.0, A[0], A[1]);

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4Nick double hyp = Geom::distance(A, B);

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4Nick double c = (B[0] - A[0]) / hyp; // cos(alpha)

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4Nick double s = (B[1] - A[1]) / hyp; // sin(alpha)

05445c57397b3e794e8d49df2f80af94d294da78JazzyNico

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4Nick Geom::Matrix m2(c, -s, s, c, 0.0, 0.0);

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4Nick Geom::Matrix sca(1.0, 0.0, 0.0, -1.0, 0.0, 0.0);

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4Nick

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4Nick Geom::Matrix m = m1.inverse() * m2;

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4Nick m = m * sca;

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4Nick m = m * m2.inverse();

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4Nick m = m * m1;

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4Nick

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4Nick for (int i = 0; i < static_cast<int>(path_in.size()); ++i) {

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4Nick path_out.push_back(path_in[i] * m);

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4Nick }

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4Nick

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4Nick return path_out;

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4Nick}

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4Nick

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4Nick} //namespace LivePathEffect

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4Nick} /* namespace Inkscape */

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4Nick

7765ee8964c8ffd7faee9baa0412abeb1ef5b0a4Nick