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Minor fixes to time computation and right-hand rule

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This commit is contained in:
Alessandro Ranellucci 2011-09-26 15:08:05 +02:00
parent 478047fad3
commit 742f646372
2 changed files with 3 additions and 3 deletions
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4
lib/Slic3r/STL.pm
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@ -2,6 +2,7 @@ package Slic3r::STL;
use Moo;
use CAD::Format::STL;
use Math::Clipper qw(is_counter_clockwise);
use XXX;
use constant X => 0;
@ -107,8 +108,7 @@ sub _facet {
# the normal using the right-hand rule
# (this relies on the STL to be well-formed)
# recompute the normal using the right-hand rule
my $clockwise = ($vertices[2]->[X] - $vertices[0]->[X]) * ($vertices[1]->[Y] - $vertices[0]->[Y])
- ($vertices[1]->[X] - $vertices[0]->[X]) * ($vertices[2]->[Y] - $vertices[0]->[Y]);
my $clockwise = !is_counter_clockwise([@vertices]);
# defensive programming and/or input check
if (($normal->[Z] > 0 && $clockwise > 0) || ($normal->[Z] < 0 && $clockwise < 0)) {