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Bugfix: Offset with rounded join_type calculated fragments incorrectly for delta < 1

master
Oskar Linde 2014-05-17 14:23:46 +02:00
parent a886d001ba
commit dfa1748c81
1 changed files with 1 additions and 1 deletions
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2
src/GeometryEvaluator.cc
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@ -413,7 +413,7 @@ Response GeometryEvaluator::visit(State &state, const OffsetNode &node)
// ClipperLib documentation: The formula for the number of steps in a full
// circular arc is ... Pi / acos(1 - arc_tolerance / abs(delta))
double n = Calc::get_fragments_from_r(10, node.fn, node.fs, node.fa);
double arc_tolerance = abs(node.delta) * (1 - cos(M_PI / n));
double arc_tolerance = std::abs(node.delta) * (1 - cos(M_PI / n));
const Polygon2d *result = ClipperUtils::applyOffset(*polygon, node.delta, node.join_type, node.miter_limit, arc_tolerance);
assert(result);
geom.reset(result);