diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/2geom/piecewise.h | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/src/2geom/piecewise.h b/src/2geom/piecewise.h index 837f33ea7..e3b4d3456 100644 --- a/src/2geom/piecewise.h +++ b/src/2geom/piecewise.h @@ -783,10 +783,13 @@ Piecewise<T> compose(Piecewise<T> const &f, SBasis const &g){ double t0=(*cut).first; double t1=(*next).first; - SBasis sub_g=compose(g, Linear(t0,t1)); - sub_g=compose(Linear(-f.cuts[idx]/(f.cuts[idx+1]-f.cuts[idx]), - (1-f.cuts[idx])/(f.cuts[idx+1]-f.cuts[idx])),sub_g); - result.push(compose(f[idx],sub_g),t1); + if (!are_near(t0,t1,EPSILON*EPSILON)) { // prevent adding cuts that are extremely close together and that may cause trouble with rounding e.g. when reversing the path + SBasis sub_g=compose(g, Linear(t0,t1)); + sub_g=compose(Linear(-f.cuts[idx]/(f.cuts[idx+1]-f.cuts[idx]), + (1-f.cuts[idx])/(f.cuts[idx+1]-f.cuts[idx])),sub_g); + result.push(compose(f[idx],sub_g),t1); + } + cut++; next++; } |