1 files changed, 90 insertions, 0 deletions
diff --git a/src/live_effects/lpe-interpolate_points.cpp b/src/live_effects/lpe-interpolate_points.cpp
new file mode 100644
index 0000000..1d84811
--- /dev/null
+++ b/src/live_effects/lpe-interpolate_points.cpp
@@ -0,0 +1,90 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/** \file
+ * LPE interpolate_points implementation
+ *   Interpolates between knots of the input path.
+ */
+/*
+ * Authors:
+ *   Johan Engelen
+ *
+ * Copyright (C) Johan Engelen 2014 <j.b.c.engelen@alumnus.utwente.nl>
+ *
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#include "live_effects/lpe-interpolate_points.h"
+#include "live_effects/lpe-powerstroke-interpolators.h"
+// TODO due to internal breakage in glibmm headers, this must be last:
+#include <glibmm/i18n.h>
+
+namespace Inkscape {
+namespace LivePathEffect {
+
+
+static const Util::EnumData<unsigned> InterpolatorTypeData[] = {
+    {Geom::Interpolate::INTERP_LINEAR          , N_("Linear"), "Linear"},
+    {Geom::Interpolate::INTERP_CUBICBEZIER          , N_("CubicBezierFit"), "CubicBezierFit"},
+    {Geom::Interpolate::INTERP_CUBICBEZIER_JOHAN     , N_("CubicBezierJohan"), "CubicBezierJohan"},
+    {Geom::Interpolate::INTERP_SPIRO  , N_("SpiroInterpolator"), "SpiroInterpolator"},
+    {Geom::Interpolate::INTERP_CENTRIPETAL_CATMULLROM, N_("Centripetal Catmull-Rom"), "CentripetalCatmullRom"}
+};
+static const Util::EnumDataConverter<unsigned> InterpolatorTypeConverter(InterpolatorTypeData, sizeof(InterpolatorTypeData)/sizeof(*InterpolatorTypeData));
+
+LPEInterpolatePoints::LPEInterpolatePoints(LivePathEffectObject *lpeobject)
+    : Effect(lpeobject)
+    , interpolator_type(
+          _("Interpolator type:"),
+          _("Determines which kind of interpolator will be used to interpolate between stroke width along the path"),
+          "interpolator_type", InterpolatorTypeConverter, &wr, this, Geom::Interpolate::INTERP_CENTRIPETAL_CATMULLROM)
+{
+    show_orig_path = false;
+
+    registerParameter( &interpolator_type );
+}
+
+LPEInterpolatePoints::~LPEInterpolatePoints()
+= default;
+
+Geom::PathVector
+LPEInterpolatePoints::doEffect_path (Geom::PathVector const & path_in)
+{
+    Geom::PathVector path_out;
+    std::unique_ptr<Geom::Interpolate::Interpolator> interpolator(  Geom::Interpolate::Interpolator::create(static_cast<Geom::Interpolate::InterpolatorType>(interpolator_type.get_value())) );
+
+    for(const auto & path_it : path_in) {
+        if (path_it.empty())
+            continue;
+
+        if (path_it.closed()) {
+            g_warning("Interpolate points LPE currently ignores whether path is closed or not.");
+        }
+
+        std::vector<Geom::Point> pts;
+        pts.push_back(path_it.initialPoint());
+
+        for (Geom::Path::const_iterator it = path_it.begin(), e = path_it.end_default(); it != e; ++it) {
+            pts.push_back((*it).finalPoint());
+        }
+
+        Geom::Path path = interpolator->interpolateToPath(pts);
+
+        path_out.push_back(path);
+    }
+
+    return path_out;
+}
+
+
+} //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 :