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raw | patch | inline | side by side (parent: 3968961)
raw | patch | inline | side by side (parent: 3968961)
author | scislac <scislac@users.sourceforge.net> | |
Sat, 26 Sep 2009 20:11:28 +0000 (20:11 +0000) | ||
committer | scislac <scislac@users.sourceforge.net> | |
Sat, 26 Sep 2009 20:11:28 +0000 (20:11 +0000) |
src/live_effects/lpe-bendpath.cpp | patch | blob | history |
index a820fe4788e5b080feb296d0710ad32ab7740329..bc8477829d8cef526c23908ceda254f6294b60fa 100644 (file)
The first step is to re-parametrize B by its arc length: this is the parametrization in which a point p on B is located by its distance s from start. One obtains a new map s --> U(s) = (a'(s),b'(s)), that still describes the same path B, but where the distance along B from start to
U(s) is s itself.
-We also need a unit normal to the path. This can be obtained by computing a unit tangent vector, and rotate it by 90°. Call this normal vector N(s).
+We also need a unit normal to the path. This can be obtained by computing a unit tangent vector, and rotate it by 90�. Call this normal vector N(s).
The basic deformation associated to B is then given by:
@@ -100,11 +100,14 @@ LPEBendPath::doEffect_pwd2 (Geom::Piecewise<Geom::D2<Geom::SBasis> > const & pwd
Piecewise<SBasis> x = vertical_pattern.get_value() ? Piecewise<SBasis>(patternd2[1]) : Piecewise<SBasis>(patternd2[0]);
Piecewise<SBasis> y = vertical_pattern.get_value() ? Piecewise<SBasis>(patternd2[0]) : Piecewise<SBasis>(patternd2[1]);
-//We use the group bounding box size or the path bbox size to translate well x and y
- x-= vertical_pattern.get_value() ? boundingbox_Y.min() : boundingbox_X.min();
- y-= vertical_pattern.get_value() ? boundingbox_X.middle() : boundingbox_Y.middle();
+ Interval bboxHorizontal = vertical_pattern.get_value() ? boundingbox_Y : boundingbox_X;
+ Interval bboxVertical = vertical_pattern.get_value() ? boundingbox_X : boundingbox_Y;
- double scaling = uskeleton.cuts.back()/boundingbox_X.extent();
+ //We use the group bounding box size or the path bbox size to translate well x and y
+ x-= bboxHorizontal.min();
+ y-= bboxVertical.middle();
+
+ double scaling = uskeleton.cuts.back()/bboxHorizontal.extent();
if (scaling != 1.0) {
x*=scaling;