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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.
51 lines
1.4 KiB
Plaintext
51 lines
1.4 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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# test is the copy of the test case bug29311_2
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# but computing the optimal OBB comparing to tight AABB
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# with 1.e-6% precision
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set NbIters 101
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set step [expr 360.0/($NbIters-1) ]
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restore [locate_data_file bug29237_no_overlap.rhs.brep] a
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# Create AABB for a and put it into "r1" variable
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# Draw[]> bounding a -shape r1
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# The volume of one AABB is
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# Draw[]> vprops r1 1.0e-12 -full
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# 32736000.184203226
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set Vexp 32736000.184203226
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set VMax 0
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set MaxIteration 0
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for {set i 1} { $i <= $NbIters} { incr i } {
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bounding a -obb -shape rr$i -optimal
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regexp {Mass +: +([-0-9.+eE]+)} [vprops rr$i 1.0e-12 -full] full Vreal
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if { $Vreal > $VMax } {
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set VMax $Vreal
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set MaxIteration $i
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copy a amax
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}
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if { $i != $NbIters } { trotate a 283 162 317 2 7 9 $step }
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}
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set aDeltaMax [ expr 100.0*abs($VMax/$Vexp - 1.0) ]
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puts "Delta of computation not greater than $aDeltaMax %. Maximal delta is achieved in $MaxIteration iteration. See \"amax\" shape."
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if { $aDeltaMax > 1.e-6 } {
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puts "Error: The obtained OBB(s) is not precise."
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}
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smallview
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donly amax rr${MaxIteration}
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fit
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checkview -screenshot -2d -path ${imagedir}/${test_image}.png
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