New LPE: Ruler

(bzr r6319)

1 files changed, 79 insertions, 0 deletions

diff --git a/src/live_effects/lpe-ruler.cpp b/src/live_effects/lpe-ruler.cpp
new file mode 100644
index 000000000..5a3f8c285
--- /dev/null
+++ b/src/live_effects/lpe-ruler.cpp
@@ -0,0 +1,79 @@
+#define INKSCAPE_LPE_RULER_CPP
+
+/** \file
+ * LPE <ruler> implementation, see lpe-ruler.cpp.
+ */
+
+/*
+ * Authors:
+ *   Maximilian Albert
+ *   Johan Engelen
+ *
+ * Copyright (C) Maximilian Albert 2008 <maximilian.albert@gmail.com>
+ *
+ * Released under GNU GPL, read the file 'COPYING' for more information
+ */
+
+#include "live_effects/lpe-ruler.h"
+#include <2geom/piecewise.h>
+
+namespace Inkscape {
+namespace LivePathEffect {
+
+LPERuler::LPERuler(LivePathEffectObject *lpeobject) :
+    Effect(lpeobject),
+    mark_distance(_("Mark distance"), _("Distance between ruler marks"), "mark_distance", &wr, this, 50),
+    mark_length(_("Mark length"), _("Length of ruler marks"), "mark_length", &wr, this, 10)
+{
+    registerParameter(dynamic_cast<Parameter *>(&mark_distance));
+    registerParameter(dynamic_cast<Parameter *>(&mark_length));
+
+    mark_distance.param_make_integer();
+    mark_length.param_make_integer();
+}
+
+LPERuler::~LPERuler()
+{
+
+}
+
+Geom::Piecewise<Geom::D2<Geom::SBasis> >
+LPERuler::doEffect_pwd2 (Geom::Piecewise<Geom::D2<Geom::SBasis> > const & pwd2_in)
+{
+    using namespace Geom;
+
+    Point A(pwd2_in.firstValue());
+    Point B(pwd2_in.lastValue());
+
+    Piecewise<D2<SBasis> >output(D2<SBasis>(Linear(A[X], B[X]), Linear(A[Y], B[Y])));
+
+    Point dir(unit_vector(B - A));
+    Point n(-rot90(dir) * mark_length);
+    double length = L2(B - A);
+
+    Point C, D;
+    for (int i = 0; i < length; i+=mark_distance) {
+        C = A + dir * i;
+        D = C + n;
+        Piecewise<D2<SBasis> > seg(D2<SBasis>(Linear(C[X], D[X]), Linear(C[Y], D[Y])));
+        output.concat(seg);
+    }
+
+    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 :