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Comment out Moon Metty's llRotBetween algorithm.

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Sei Lisa 2017-01-25 19:29:57 +01:00
parent f0c115f924
commit 813bdf36e9
1 changed files with 21 additions and 21 deletions
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42
lslopt/lslbasefuncs.py
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@ -1673,27 +1673,27 @@ def llRotBetween(v1, v2):
return Quaternion((0., 0., 1., 0.)) # rotate around the Z-axis return Quaternion((0., 0., 1., 0.)) # rotate around the Z-axis
# Algorithm by Moon Metty (for reference) # Algorithm by Moon Metty (for reference)
dot = mul(v1, v2, f32=False) # dot = mul(v1, v2, f32=False)
cross = mod(v1, v2, f32=False) # cross = mod(v1, v2, f32=False)
csq = mul(cross, cross, f32=False) # csq = mul(cross, cross, f32=False)
#
ddc2 = dot*dot + csq # ddc2 = dot*dot + csq
#
DenormalStart = float.fromhex('0x1p-149') # DenormalStart = float.fromhex('0x1p-149')
if ddc2 >= DenormalStart: # if ddc2 >= DenormalStart:
if csq >= DenormalStart: # if csq >= DenormalStart:
s = math.sqrt(ddc2) + dot; # s = math.sqrt(ddc2) + dot;
m = math.sqrt(csq + s*s); # m = math.sqrt(csq + s*s);
return Quaternion(F32((cross[0]/m, cross[1]/m, cross[2]/m, s/m))) # return Quaternion(F32((cross[0]/m, cross[1]/m, cross[2]/m, s/m)))
#
# Deal with degenerate cases here # # Deal with degenerate cases here
if dot > 0: # if dot > 0:
return ZERO_ROTATION # return ZERO_ROTATION
m = math.sqrt(v1[0]*v1[0] + v1[1]*v1[1]) # m = math.sqrt(v1[0]*v1[0] + v1[1]*v1[1])
if m >= DenormalStart: # if m >= DenormalStart:
return Quaternion(F32((v1[1]/m, -v1[0]/m, 0., 0.))) # return Quaternion(F32((v1[1]/m, -v1[0]/m, 0., 0.)))
return Quaternion((1., 0., 0., 0.)) # return Quaternion((1., 0., 0., 0.))
return ZERO_ROTATION # return ZERO_ROTATION
def llRound(f): def llRound(f):
assert isfloat(f) assert isfloat(f)