1. use face_normals as convex_hull normals instead of quantized normals.
2. The quantized normals will result in bad orientation because of accumulated error.
Change-Id: I8e554905dcec430738135cb8a9f08d8e0fdfecae
(cherry picked from commit 33c474f6f6e7469aed75e981e700e0279cb23de3)
[STUDIO-1079] Large plane not stick to bed
[STUDIO-1437] Model auto flipping bug
1. Changed the orientation threshold so that some tiny rotations wont be ignored.
2. Added flipping detection. Rotation with same unprintability will not be excuted.
3. Added the weight of first layer area to improve large planar face orientatio performance while not influence other objects with small first layer areas.
Change-Id: I1efc9252c90bc053e65cb71e7770cb8d0305cb6e
(cherry picked from commit 1eda67e4fd0cd2536af219e0c225fc08949b5023)
The tolerance of orientation filter is too large.
Jira: STUDIO-1375,1376,1382
Change-Id: I794a161e74acbcf2e13c03dcc6e5e51d6b4e1f23
(cherry picked from commit 9d8f838fb06b8c0d4efed3e50d33db410efae360)
shuai.liu
lane.wei