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index 98814eab0ef09d0853b31d5aa32e4d63362aa8ff..e72f1aac15026d7b57f63ca547c997f329b7849a 100644 (file)
#include "sp-item.h"
#include "sp-path.h"
#include "live_effects/n-art-bpath-2geom.h"
+#include "xml/repr.h"
#include <2geom/path.h>
#include <2geom/piecewise.h>
Interval bndsStrokeY = bounds_exact(stroke[1]);
Point stroke_origin(bndsStroke.min(), (bndsStrokeY.max()+bndsStrokeY.min())/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();
- gdouble tAclean = tA; // the tA without spacing_variation
- gdouble tBclean = tB; // the tB without spacing_variation
- for (int i = 0; i < nrofpaths; i++) {
- Point start = A(tA);
- Point end = B(tB);
- if (startpoint_edge_variation.get_value() != 0)
- start = start + (startpoint_edge_variation - startpoint_edge_variation.get_value()/2) * (end - start);
- if (endpoint_edge_variation.get_value() != 0)
- end = end + (endpoint_edge_variation - endpoint_edge_variation.get_value()/2)* (end - start);
-
- gdouble scaling_y = 1.0;
- if (scale_y_rel.get_value()) {
- scaling_y = (L2(end-start)/scaling)*prop_scale;
- } else {
- scaling_y = prop_scale;
+ std::vector<Geom::Path> path_out;
+
+ // do this for all permutations (ii,jj) if there are more than 2 paths? realllly cool!
+ for (int ii = 0 ; ii < path_in.size() - 1; ii++)
+ for (int jj = ii+1; jj < path_in.size(); jj++)
+ {
+ Piecewise<D2<SBasis> > A = arc_length_parametrization(Piecewise<D2<SBasis> >(path_in[ii].toPwSb()),2,.1);
+ Piecewise<D2<SBasis> > B = arc_length_parametrization(Piecewise<D2<SBasis> >(path_in[jj].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();
+ gdouble tAclean = tA; // the tA without spacing_variation
+ gdouble tBclean = tB; // the tB without spacing_variation
+
+ for (int i = 0; i < nrofpaths; i++) {
+ Point start = A(tA);
+ Point end = B(tB);
+ if (startpoint_edge_variation.get_value() != 0)
+ start = start + (startpoint_edge_variation - startpoint_edge_variation.get_value()/2) * (end - start);
+ if (endpoint_edge_variation.get_value() != 0)
+ end = end + (endpoint_edge_variation - endpoint_edge_variation.get_value()/2)* (end - start);
+
+ if (!Geom::are_near(start,end)) {
+ gdouble scaling_y = 1.0;
+ if (scale_y_rel.get_value()) {
+ scaling_y = (L2(end-start)/scaling)*prop_scale;
+ } else {
+ scaling_y = prop_scale;
+ }
+
+ Matrix transform;
+ transform.setXAxis( (end-start) / scaling );
+ transform.setYAxis( rot90(unit_vector(end-start)) * scaling_y);
+ transform.setTranslation( start );
+ Piecewise<D2<SBasis> > pwd2_out = (strokepath-stroke_origin) * transform;
+
+ // add stuff to one big pw<d2<sbasis> > and then outside the loop convert to path?
+ // No: this way, the separate result paths are kept separate which might come in handy some time!
+ std::vector<Geom::Path> result = Geom::path_from_piecewise(pwd2_out, LPE_CONVERSION_TOLERANCE);
+ path_out.push_back(result[0]);
+ }
+ gdouble svA = startpoint_spacing_variation - startpoint_spacing_variation.get_value()/2;
+ gdouble svB = endpoint_spacing_variation - endpoint_spacing_variation.get_value()/2;
+ tAclean += incrementA;
+ tBclean += incrementB;
+ tA = tAclean + incrementA * svA;
+ tB = tBclean + incrementB * svB;
+ if (tA > bndsA.max())
+ tA = bndsA.max();
+ if (tB > bndsB.max())
+ tB = bndsB.max();
}
-
- Matrix transform;
- transform.setXAxis( (end-start) / scaling );
- transform.setYAxis( rot90(unit_vector(end-start)) * scaling_y);
- transform.setTranslation( start );
- Piecewise<D2<SBasis> > pwd2_out = (strokepath-stroke_origin) * transform;
- // add stuff to one big pw<d2<sbasis> > and then outside the loop convert to path?
- std::vector<Geom::Path> result = Geom::path_from_piecewise(pwd2_out, LPE_CONVERSION_TOLERANCE);
- path_out[i] = result[0];
- gdouble svA = startpoint_spacing_variation - startpoint_spacing_variation.get_value()/2;
- gdouble svB = endpoint_spacing_variation - endpoint_spacing_variation.get_value()/2;
- tAclean += incrementA;
- tBclean += incrementB;
- tA = tAclean + incrementA * svA;
- tB = tBclean + incrementB * svB;
- if (tA > bndsA.max())
- tA = bndsA.max();
- if (tB > bndsB.max())
- tB = bndsB.max();
}
return path_out;
Point start(bndsX.min(), (bndsY.max()+bndsY.min())/2);
Point end(bndsX.max(), (bndsY.max()+bndsY.min())/2);
- Geom::Path path;
- path.start( start );
- path.appendNew<Geom::LineSegment>( end );
- strokepath.param_set_and_write_new_value( path.toPwSb() );
+ if ( !Geom::are_near(start,end) ) {
+ Geom::Path path;
+ path.start( start );
+ path.appendNew<Geom::LineSegment>( end );
+ strokepath.param_set_and_write_new_value( path.toPwSb() );
+ } else {
+ // bounding box is too small to make decent path. set to default default. :-)
+ strokepath.param_set_and_write_default();
+ }
}
void