Question about edges

[Tim Gould]

Hi Roland,

You'll still (admittedly extremely rarely if you set appDef_decCntMul small enough) end up with false negatives from that (see below). Which may not be a problem. Although I suppose that by vounting through twice you could offset by half appDef_decCntMul in the second loop and look and add anything that matches there to your list of matches.

Code:

appDef_decCntMul=10000 #1e-4 precision
# Before flooring
Point1=(0.44499...,0.99434...)
Point2=(0.44500...,0.99434...)
# floor
Point1F=(0.4449,0.9943)
Point2F=(0.4450,0.9943)
# compare
bitwise=(Point1F==Point2F) # is false
distance=norm(Point1-Point2) # 1e-5 < Precision

below will avoid false negatives, but give (arguable) false positives...

Code:

appDef_decCntMul=10000 #1e-4 precision
# Before flooring
Point1=(0.44499...,0.99434...)
Point2=(0.44500...,0.99434...)
# floor
Point1F=(0.4449,0.9943)
Point2F=(0.4450,0.9943)
# round(x) = floor(x+0.5)
Point1R=(0.4450,0.9943)
Point2R=(0.4450,0.9943)
# compare
bitwise=(Point1F==Point2F) || (Point1R==Point2R) # is true
distance=norm(Point1-Point2) # 1e-5 < Precision

Tim