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ENH: extrude all loops ccw

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Signed-off-by: salt.wei <salt.wei@bambulab.com>
Change-Id: I548bff50567c4cb6770585aafc7efb20889084d6
This commit is contained in:
salt.wei 2022-12-01 15:38:15 +08:00 • committed by Lane.Wei
parent 04f66e974f
commit 614882d28b
1 changed files with 4 additions and 7 deletions
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11
src/libslic3r/GCode.cpp
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@ -3177,11 +3177,8 @@ std::string GCode::extrude_loop(ExtrusionLoop loop, std::string description, dou
// get a copy; don't modify the orientation of the original loop object otherwise
// next copies (if any) would not detect the correct orientation
//BBS: extrude contour of wall ccw, hole of wall cw, except spiral mode
bool was_clockwise = loop.is_clockwise();
if (m_config.spiral_mode || !is_perimeter(loop.role()))
loop.make_counter_clockwise();
bool current_clockwise = loop.is_clockwise();
// extrude all loops ccw
bool was_clockwise = loop.make_counter_clockwise();
// find the point of the loop that is closest to the current extruder position
// or randomize if requested
@ -3246,7 +3243,7 @@ std::string GCode::extrude_loop(ExtrusionLoop loop, std::string description, dou
//FIXME improve the algorithm in case the loop is split into segments with a low number of points (see the Point b query).
Point a = paths.front().polyline.points[1]; // second point
Point b = *(paths.back().polyline.points.end()-3); // second to last point
if (was_clockwise != current_clockwise) {
if (was_clockwise) {
// swap points
Point c = a; a = b; b = c;
}
@ -3254,7 +3251,7 @@ std::string GCode::extrude_loop(ExtrusionLoop loop, std::string description, dou
double angle = paths.front().first_point().ccw_angle(a, b) / 3;
// turn left if contour, turn right if hole
if (was_clockwise != current_clockwise) angle *= -1;
if (was_clockwise) angle *= -1;
// create the destination point along the first segment and rotate it
// we make sure we don't exceed the segment length because we don't know