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FIX: align to Y not working 

This is a bug introduced in 7fbb650 when solving jira STUDIO-4695.
Now we use a more decent way to solve it.

Change-Id: I92deffcb9fe53e8a24c93fe973446ae37df07375
(cherry picked from commit bd98430dbd15eb6c9bb4b447990e0dcf8a50eef0)
This commit is contained in:
Arthur 2023-11-09 20:03:04 +08:00 committed by Lane.Wei
parent 6412bb9b4d
commit 82d5935a5e
1 changed files with 9 additions and 2 deletions
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11
src/libslic3r/Arrange.cpp
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@ -228,16 +228,23 @@ void update_selected_items_axis_align(ArrangePolygons& selected, const DynamicPr
double c = m02 / m00 - cy * cy;
//if a and c are close, there is no dominant axis, then do not rotate
if (std::abs(a) < 1.5*std::abs(c) || std::abs(c) < 1.5*std::abs(a)) {
// ratio is always no more than 1
double ratio = std::abs(a) > std::abs(c) ? std::abs(c / a) :
std::abs(c) > 0 ? std::abs(a / c) : 0;
if (ratio>0.66) {
validResult = false;
}
else {
angle = std::atan2(2 * b, (a - c)) / 2;
angle = PI / 2 - angle;
// if the angle is close to PI or -PI, it means the object is vertical, then do not rotate
if (std::abs(std::abs(angle) - PI) < 0.01)
angle = 0;
validResult = true;
}
}
}
if (validResult) { ap.rotation += (PI / 2 - angle); }
if (validResult) { ap.rotation += angle; }
}
}