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| author | Johan B. C. Engelen <jbc.engelen@swissonline.ch> | 2007-08-29 22:36:46 +0000 |
|---|---|---|
| committer | johanengelen <johanengelen@users.sourceforge.net> | 2007-08-29 22:36:46 +0000 |
| commit | 0b4b6cf7cdf14a64844186ea1e22ef6a0dba42bb (patch) | |
| tree | 045ce745d261eeb22875310393ff32dc59beff0e /src/live_effects/lpe-curvestitch.cpp | |
| parent | Dockable dialogs patch applied (diff) | |
| download | inkscape-0b4b6cf7cdf14a64844186ea1e22ef6a0dba42bb.tar.gz inkscape-0b4b6cf7cdf14a64844186ea1e22ef6a0dba42bb.zip | |
LPE:
- rename RealParam to ScalarParam, add range checking for ScalarParam, add integer only flag for it aswell.
- fix up todo.txt and create new one for parameters
- add Curve Stitch LPE
(bzr r3614)
Diffstat (limited to 'src/live_effects/lpe-curvestitch.cpp')
| -rw-r--r-- | src/live_effects/lpe-curvestitch.cpp | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/src/live_effects/lpe-curvestitch.cpp b/src/live_effects/lpe-curvestitch.cpp new file mode 100644 index 000000000..1769a40a1 --- /dev/null +++ b/src/live_effects/lpe-curvestitch.cpp @@ -0,0 +1,106 @@ +#define INKSCAPE_LPE_EXPRESSION_CPP
+/** \file
+ * SVG <skeleton> implementation, used as an example for a base starting class
+ * when implementing new LivePathEffects.
+ *
+ */
+/*
+ * Authors:
+ * Johan Engelen
+*
+* Copyright (C) Johan Engelen 2007 <j.b.c.engelen@utwente.nl>
+ *
+ * Released under GNU GPL, read the file 'COPYING' for more information
+ */
+
+#include "live_effects/lpe-curvestitch.h"
+#include "display/curve.h"
+#include <libnr/n-art-bpath.h>
+
+#include <2geom/path.h>
+#include <2geom/piecewise.h>
+#include <2geom/sbasis.h>
+#include <2geom/sbasis-geometric.h>
+#include <2geom/bezier-to-sbasis.h>
+#include <2geom/sbasis-to-bezier.h>
+#include <2geom/d2.h>
+
+#include "ui/widget/scalar.h"
+#include "libnr/nr-values.h"
+
+namespace Inkscape {
+namespace LivePathEffect {
+
+using namespace Geom;
+
+LPECurveStitch::LPECurveStitch(LivePathEffectObject *lpeobject) :
+ Effect(lpeobject),
+ strokepath(_("Stroke path"), _("The path that will be stroked, whatever, think of good text here."), "strokepath", &wr, this, "M0,0 L1,1"),
+ nrofpaths(_("Nr of paths"), _("The number of paths that will be generated."), "count", &wr, this, 5),
+ startpoint_variation(_("Startpoint variation"), _("..."), "startpoint_variation", &wr, this, 0),
+ endpoint_variation(_("Endpoint variation"), _("..."), "endpoint_variation", &wr, this, 0)
+{
+ registerParameter( dynamic_cast<Parameter *>(&nrofpaths) );
+// registerParameter( dynamic_cast<Parameter *>(&startpoint_variation) );
+// registerParameter( dynamic_cast<Parameter *>(&endpoint_variation) );
+
+ nrofpaths.param_make_integer();
+ nrofpaths.param_set_range(2, NR_HUGE);
+
+// startpoint_variation.param_set_range(-NR_HUGE, 1);
+// endpoint_variation.param_set_range(-1, NR_HUGE);
+}
+
+LPECurveStitch::~LPECurveStitch()
+{
+
+}
+
+std::vector<Geom::Path>
+LPECurveStitch::doEffect (std::vector<Geom::Path> & path_in)
+{
+ if (path_in.size() >= 2) {
+ std::vector<Geom::Path> path_out (nrofpaths);
+
+ // do this for all permutations if there are more than 2 paths? realllly cool!
+ Piecewise<D2<SBasis> > A = arc_length_parametrization(Piecewise<D2<SBasis> >(path_in[0].toPwSb()),2,.1);
+ Piecewise<D2<SBasis> > B = arc_length_parametrization(Piecewise<D2<SBasis> >(path_in[1].toPwSb()),2,.1);
+ Interval bndsA = A.domain();
+ Interval bndsB = B.domain();
+ gdouble incrementA = (bndsA.max()-bndsA.min()) / (nrofpaths-1);
+ gdouble incrementB = (bndsB.max()-bndsB.min()) / (nrofpaths-1);
+ gdouble tA = bndsA.min();
+ gdouble tB = bndsB.min();
+ for (int i = 0; i < nrofpaths; i++) {
+ Point start = A(tA);
+ Point end = B(tB);
+ if (startpoint_variation != 0)
+ start = start + g_random_double_range(0, startpoint_variation) * (end - start);
+ if (endpoint_variation != 0)
+ end = end + g_random_double_range(0, endpoint_variation) * (end - start);
+
+ path_out[i].start( start );
+ path_out[i].appendNew<LineSegment>( end );
+ tA += incrementA;
+ tB += incrementB;
+ }
+
+ return path_out;
+ } else {
+ return path_in;
+ }
+}
+
+} //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 :
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