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1bb67d3844
Add possibility of construction of the Optimal Oriented Bounding Box from set of points (the case of shape with triangulation). The interface of the BRepBndLib::AddOBB method is not changed, but the option <theIsOptimal> now controls also the construction of the OBB from Set of points. The slightly modified DiTo algorithm will be used, checking all possible axes created by the extreme points. The performance of the construction of the Optimal OBB is lower but the quality is usually much higher (can't be worse by definition). Test cases for the issue.
42 lines
1.2 KiB
Plaintext
42 lines
1.2 KiB
Plaintext
puts "==============================================================="
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puts "0030595: Oriented Bounding Box seems not optimal for some shapes"
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puts "==============================================================="
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puts ""
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# average volumes of OBBs on different sets
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set OBB_Vol_Exp 615000
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# set relative error to 1%
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set eps 0.01
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restore [locate_data_file bug30595_UC4_P_2K.brep] s1
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# build OBB
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dchrono s1_time start
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bounding s1 -obb -shape bs1 -optimal
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dchrono s1_time stop counter s1_OBB
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# check volume
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checkprops bs1 -v $OBB_Vol_Exp -deps $eps
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restore [locate_data_file bug30595_UC4_P_13K.brep] s2
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# build OBB
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dchrono s2_time start
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bounding s2 -obb -shape bs2 -optimal
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dchrono s2_time stop counter s2_OBB
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# check volume
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checkprops bs2 -v $OBB_Vol_Exp -deps $eps
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restore [locate_data_file bug30595_UC4_P_125K.brep] s3
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# build OBB
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dchrono s3_time start
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bounding s3 -obb -shape bs3 -optimal
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dchrono s3_time stop counter s3_OBB
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# check volume
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checkprops bs3 -v $OBB_Vol_Exp -deps $eps
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smallview +X+Z
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donly s3 bs3; fit
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checkview -screenshot -2d -path ${imagedir}/${test_image}_xz.png
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smallview +X+Y
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donly s3 bs3; fit
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checkview -screenshot -2d -path ${imagedir}/${test_image}_xy.png
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