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author | cilix42 <cilix42@users.sourceforge.net> | |
Mon, 2 Jun 2008 09:21:26 +0000 (09:21 +0000) | ||
committer | cilix42 <cilix42@users.sourceforge.net> | |
Mon, 2 Jun 2008 09:21:26 +0000 (09:21 +0000) |
src/live_effects/lpe-tangent_to_curve.cpp | patch | blob | history |
index 6293ba2334b259bb2f5bf7a001a9073caaaa3d62..80158e2f4c81f165f33344c2031ed12ae73b274e 100644 (file)
-#define INKSCAPE_LPE_TANGENT_TO_CURVE_CPP\r
-/** \file\r
- * Implementation of tangent-to-curve LPE.\r
- */\r
-\r
-/*\r
- * Authors:\r
- * Johan Engelen\r
- * Maximilian Albert\r
- *\r
- * Copyright (C) Johan Engelen 2007 <j.b.c.engelen@utwente.nl>\r
- * Copyright (C) Maximilian Albert 2008 <maximilian.albert@gmail.com>\r
- *\r
- * Released under GNU GPL, read the file 'COPYING' for more information\r
- */\r
-\r
-#include "live_effects/lpe-tangent_to_curve.h"\r
-// FIXME: The following are only needed to convert the path's SPCurve* to pwd2.\r
-// There must be a more convenient way to achieve this.\r
-#include "sp-path.h"\r
-#include "display/curve.h"\r
-#include "libnr/n-art-bpath-2geom.h"\r
-\r
-#include <2geom/path.h>\r
-#include <2geom/transforms.h>\r
-\r
-namespace Inkscape {\r
-namespace LivePathEffect {\r
-\r
-/* FIXME: We should make these member functions of LPETangentToCurve.\r
- Is there an easy way to register member functions with knotholder?\r
- KNOWN BUG: Because of the above, this effect does not work well when in an LPE stack\r
-*/\r
-NR::Point attach_pt_get(SPItem *item) {\r
- Inkscape::LivePathEffect::LPETangentToCurve *lpe =\r
- dynamic_cast<Inkscape::LivePathEffect::LPETangentToCurve *> (sp_lpe_item_get_current_lpe(SP_LPE_ITEM(item)));\r
-\r
- if (lpe)\r
- return lpe->ptA;\r
- else\r
- return NR::Point(0,0);\r
-}\r
-\r
-void attach_pt_set(SPItem *item, NR::Point const &p, NR::Point const &origin, guint state) {\r
- Inkscape::LivePathEffect::LPETangentToCurve *lpe =\r
- dynamic_cast<Inkscape::LivePathEffect::LPETangentToCurve *> (sp_lpe_item_get_current_lpe(SP_LPE_ITEM(item)));\r
-\r
- if (!lpe)\r
- return;\r
-\r
- using namespace Geom;\r
-\r
- // FIXME: There must be a better way of converting the path's SPCurve* to pwd2.\r
- SPCurve *curve = sp_path_get_curve_for_edit (SP_PATH(item));\r
- const NArtBpath *bpath = curve->get_bpath();\r
- Piecewise<D2<SBasis> > pwd2;\r
- std::vector<Geom::Path> pathv = BPath_to_2GeomPath(bpath);\r
- for (unsigned int i=0; i < pathv.size(); i++) {\r
- pwd2.concat(pathv[i].toPwSb());\r
- }\r
-\r
- double t0 = nearest_point(p.to_2geom(), pwd2);\r
- lpe->t_attach.param_set_value(t0);\r
-\r
- // FIXME: this should not directly ask for updating the item. It should write to SVG, which triggers updating.\r
- sp_lpe_item_update_patheffect (SP_LPE_ITEM(item), true, true);\r
-}\r
-\r
-NR::Point left_end_get(SPItem *item) {\r
- Inkscape::LivePathEffect::LPETangentToCurve *lpe =\r
- dynamic_cast<Inkscape::LivePathEffect::LPETangentToCurve *> (sp_lpe_item_get_current_lpe(SP_LPE_ITEM(item)));\r
-\r
- if (lpe)\r
- return lpe->C;\r
- else\r
- return NR::Point(0,0);\r
-}\r
-\r
-NR::Point right_end_get(SPItem *item) {\r
- Inkscape::LivePathEffect::LPETangentToCurve *lpe =\r
- dynamic_cast<Inkscape::LivePathEffect::LPETangentToCurve *> (sp_lpe_item_get_current_lpe(SP_LPE_ITEM(item)));\r
-\r
- if (lpe)\r
- return lpe->D;\r
- else\r
- return NR::Point(0,0);\r
-}\r
-\r
-void left_end_set(SPItem *item, NR::Point const &p, NR::Point const &origin, guint state) {\r
- Inkscape::LivePathEffect::LPETangentToCurve *lpe =\r
- dynamic_cast<Inkscape::LivePathEffect::LPETangentToCurve *> (sp_lpe_item_get_current_lpe(SP_LPE_ITEM(item)));\r
-\r
- if (!lpe)\r
- return;\r
-\r
- double lambda = Geom::nearest_point(p.to_2geom(), lpe->ptA, lpe->derivA);\r
- lpe->length_left.param_set_value(-lambda);\r
-\r
- // FIXME: this should not directly ask for updating the item. It should write to SVG, which triggers updating.\r
- sp_lpe_item_update_patheffect (SP_LPE_ITEM(item), true, true);\r
-}\r
-\r
-void right_end_set(SPItem *item, NR::Point const &p, NR::Point const &origin, guint state) {\r
- Inkscape::LivePathEffect::LPETangentToCurve *lpe =\r
- dynamic_cast<Inkscape::LivePathEffect::LPETangentToCurve *> (sp_lpe_item_get_current_lpe(SP_LPE_ITEM(item)));\r
-\r
- if (!lpe)\r
- return;\r
-\r
- double lambda = Geom::nearest_point(p.to_2geom(), lpe->ptA, lpe->derivA);\r
- lpe->length_right.param_set_value(lambda);\r
-\r
- // FIXME: this should not directly ask for updating the item. It should write to SVG, which triggers updating.\r
- sp_lpe_item_update_patheffect (SP_LPE_ITEM(item), true, true);\r
-}\r
-\r
-LPETangentToCurve::LPETangentToCurve(LivePathEffectObject *lpeobject) :\r
- Effect(lpeobject),\r
- t_attach(_("Location along curve"), _("Location of the point of attachment along the curve (between 0.0 and number-of-segments)"), "t_attach", &wr, this, 0.5),\r
- length_left(_("Length left"), _("Specifies the left end of the tangent"), "length-left", &wr, this, 150),\r
- length_right(_("Length right"), _("Specifies the right end of the tangent"), "length-right", &wr, this, 150),\r
- angle(_("Angle"), _("Additional angle between tangent and curve"), "angle", &wr, this, 0.0)\r
-{\r
- registerParameter( dynamic_cast<Parameter *>(&t_attach) );\r
- registerParameter( dynamic_cast<Parameter *>(&length_left) );\r
- registerParameter( dynamic_cast<Parameter *>(&length_right) );\r
- registerParameter( dynamic_cast<Parameter *>(&angle) );\r
- registerKnotHolderHandle(attach_pt_set, attach_pt_get);\r
- registerKnotHolderHandle(left_end_set, left_end_get);\r
- registerKnotHolderHandle(right_end_set, right_end_get);\r
-}\r
-\r
-LPETangentToCurve::~LPETangentToCurve()\r
-{\r
-}\r
-\r
-Geom::Piecewise<Geom::D2<Geom::SBasis> >\r
-LPETangentToCurve::doEffect_pwd2 (Geom::Piecewise<Geom::D2<Geom::SBasis> > const & pwd2_in)\r
-{\r
- using namespace Geom;\r
- Piecewise<D2<SBasis> > output;\r
-\r
- ptA = pwd2_in.valueAt(t_attach);\r
- derivA = unit_vector(derivative(pwd2_in).valueAt(t_attach));\r
-\r
- // TODO: Why are positive angles measured clockwise, not counterclockwise?\r
- Geom::Rotate rot(Geom::Rotate::from_degrees(-angle));\r
- derivA = derivA * rot;\r
-\r
- C = ptA - derivA * length_left;\r
- D = ptA + derivA * length_right;\r
-\r
- output = Piecewise<D2<SBasis> >(D2<SBasis>(Linear(C[X], D[X]), Linear(C[Y], D[Y])));\r
-\r
- return output;\r
-}\r
-\r
-} //namespace LivePathEffect\r
-} /* namespace Inkscape */\r
-\r
-/*\r
- Local Variables:\r
- mode:c++\r
- c-file-style:"stroustrup"\r
- c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))\r
- indent-tabs-mode:nil\r
- fill-column:99\r
- End:\r
-*/\r
-// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :\r
+#define INKSCAPE_LPE_TANGENT_TO_CURVE_CPP
+/** \file
+ * Implementation of tangent-to-curve LPE.
+ */
+
+/*
+ * Authors:
+ * Johan Engelen
+ * Maximilian Albert
+ *
+ * Copyright (C) Johan Engelen 2007 <j.b.c.engelen@utwente.nl>
+ * Copyright (C) Maximilian Albert 2008 <maximilian.albert@gmail.com>
+ *
+ * Released under GNU GPL, read the file 'COPYING' for more information
+ */
+
+#include "live_effects/lpe-tangent_to_curve.h"
+// FIXME: The following are only needed to convert the path's SPCurve* to pwd2.
+// There must be a more convenient way to achieve this.
+#include "sp-path.h"
+#include "display/curve.h"
+#include "libnr/n-art-bpath-2geom.h"
+
+#include <2geom/path.h>
+#include <2geom/transforms.h>
+
+namespace Inkscape {
+namespace LivePathEffect {
+
+/* FIXME: We should make these member functions of LPETangentToCurve.
+ Is there an easy way to register member functions with knotholder?
+ KNOWN BUG: Because of the above, this effect does not work well when in an LPE stack
+*/
+NR::Point attach_pt_get(SPItem *item) {
+ Inkscape::LivePathEffect::LPETangentToCurve *lpe =
+ dynamic_cast<Inkscape::LivePathEffect::LPETangentToCurve *> (sp_lpe_item_get_current_lpe(SP_LPE_ITEM(item)));
+
+ if (lpe)
+ return lpe->ptA;
+ else
+ return NR::Point(0,0);
+}
+
+void attach_pt_set(SPItem *item, NR::Point const &p, NR::Point const &origin, guint state) {
+ Inkscape::LivePathEffect::LPETangentToCurve *lpe =
+ dynamic_cast<Inkscape::LivePathEffect::LPETangentToCurve *> (sp_lpe_item_get_current_lpe(SP_LPE_ITEM(item)));
+
+ if (!lpe)
+ return;
+
+ using namespace Geom;
+
+ // FIXME: There must be a better way of converting the path's SPCurve* to pwd2.
+ SPCurve *curve = sp_path_get_curve_for_edit (SP_PATH(item));
+ const NArtBpath *bpath = curve->get_bpath();
+ Piecewise<D2<SBasis> > pwd2;
+ std::vector<Geom::Path> pathv = BPath_to_2GeomPath(bpath);
+ for (unsigned int i=0; i < pathv.size(); i++) {
+ pwd2.concat(pathv[i].toPwSb());
+ }
+
+ double t0 = nearest_point(p.to_2geom(), pwd2);
+ lpe->t_attach.param_set_value(t0);
+
+ // FIXME: this should not directly ask for updating the item. It should write to SVG, which triggers updating.
+ sp_lpe_item_update_patheffect (SP_LPE_ITEM(item), true, true);
+}
+
+NR::Point left_end_get(SPItem *item) {
+ Inkscape::LivePathEffect::LPETangentToCurve *lpe =
+ dynamic_cast<Inkscape::LivePathEffect::LPETangentToCurve *> (sp_lpe_item_get_current_lpe(SP_LPE_ITEM(item)));
+
+ if (lpe)
+ return lpe->C;
+ else
+ return NR::Point(0,0);
+}
+
+NR::Point right_end_get(SPItem *item) {
+ Inkscape::LivePathEffect::LPETangentToCurve *lpe =
+ dynamic_cast<Inkscape::LivePathEffect::LPETangentToCurve *> (sp_lpe_item_get_current_lpe(SP_LPE_ITEM(item)));
+
+ if (lpe)
+ return lpe->D;
+ else
+ return NR::Point(0,0);
+}
+
+void left_end_set(SPItem *item, NR::Point const &p, NR::Point const &origin, guint state) {
+ Inkscape::LivePathEffect::LPETangentToCurve *lpe =
+ dynamic_cast<Inkscape::LivePathEffect::LPETangentToCurve *> (sp_lpe_item_get_current_lpe(SP_LPE_ITEM(item)));
+
+ if (!lpe)
+ return;
+
+ double lambda = Geom::nearest_point(p.to_2geom(), lpe->ptA, lpe->derivA);
+ lpe->length_left.param_set_value(-lambda);
+
+ // FIXME: this should not directly ask for updating the item. It should write to SVG, which triggers updating.
+ sp_lpe_item_update_patheffect (SP_LPE_ITEM(item), true, true);
+}
+
+void right_end_set(SPItem *item, NR::Point const &p, NR::Point const &origin, guint state) {
+ Inkscape::LivePathEffect::LPETangentToCurve *lpe =
+ dynamic_cast<Inkscape::LivePathEffect::LPETangentToCurve *> (sp_lpe_item_get_current_lpe(SP_LPE_ITEM(item)));
+
+ if (!lpe)
+ return;
+
+ double lambda = Geom::nearest_point(p.to_2geom(), lpe->ptA, lpe->derivA);
+ lpe->length_right.param_set_value(lambda);
+
+ // FIXME: this should not directly ask for updating the item. It should write to SVG, which triggers updating.
+ sp_lpe_item_update_patheffect (SP_LPE_ITEM(item), true, true);
+}
+
+LPETangentToCurve::LPETangentToCurve(LivePathEffectObject *lpeobject) :
+ Effect(lpeobject),
+ t_attach(_("Location along curve"), _("Location of the point of attachment along the curve (between 0.0 and number-of-segments)"), "t_attach", &wr, this, 0.5),
+ length_left(_("Length left"), _("Specifies the left end of the tangent"), "length-left", &wr, this, 150),
+ length_right(_("Length right"), _("Specifies the right end of the tangent"), "length-right", &wr, this, 150),
+ angle(_("Angle"), _("Additional angle between tangent and curve"), "angle", &wr, this, 0.0)
+{
+ registerParameter( dynamic_cast<Parameter *>(&t_attach) );
+ registerParameter( dynamic_cast<Parameter *>(&length_left) );
+ registerParameter( dynamic_cast<Parameter *>(&length_right) );
+ registerParameter( dynamic_cast<Parameter *>(&angle) );
+ registerKnotHolderHandle(attach_pt_set, attach_pt_get);
+ registerKnotHolderHandle(left_end_set, left_end_get);
+ registerKnotHolderHandle(right_end_set, right_end_get);
+}
+
+LPETangentToCurve::~LPETangentToCurve()
+{
+}
+
+Geom::Piecewise<Geom::D2<Geom::SBasis> >
+LPETangentToCurve::doEffect_pwd2 (Geom::Piecewise<Geom::D2<Geom::SBasis> > const & pwd2_in)
+{
+ using namespace Geom;
+ Piecewise<D2<SBasis> > output;
+
+ ptA = pwd2_in.valueAt(t_attach);
+ derivA = unit_vector(derivative(pwd2_in).valueAt(t_attach));
+
+ // TODO: Why are positive angles measured clockwise, not counterclockwise?
+ Geom::Rotate rot(Geom::Rotate::from_degrees(-angle));
+ derivA = derivA * rot;
+
+ C = ptA - derivA * length_left;
+ D = ptA + derivA * length_right;
+
+ output = Piecewise<D2<SBasis> >(D2<SBasis>(Linear(C[X], D[X]), Linear(C[Y], D[Y])));
+
+ return output;
+}
+
+} //namespace LivePathEffect
+} /* namespace Inkscape */
+
+/*
+ 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 :