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DAMASK_EICMD
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acos has the same limits/stability as indirect asin calculation, enforing limits directly instead of scaling

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Martin Diehl 2018-02-03 09:21:19 +01:00
parent 9908734710
commit b455fcd0a3
1 changed files with 4 additions and 5 deletions
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src/math.f90
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@ -1741,13 +1741,12 @@ real(pReal) pure function math_EulerMisorientation(EulerA,EulerB)
implicit none
real(pReal), dimension(3), intent(in) :: EulerA,EulerB
real(pReal), dimension(3,3) :: r
real(pReal) :: tr
real(pReal) :: cosTheta
r = math_mul33x33(math_EulerToR(EulerB),transpose(math_EulerToR(EulerA)))
cosTheta = (math_trace33(math_mul33x33(math_EulerToR(EulerB), &
transpose(math_EulerToR(EulerA)))) - 1.0_pReal) * 0.5_pReal
tr = (math_trace33(r)-1.0_pReal)*0.4999999_pReal
math_EulerMisorientation = abs(0.5_pReal*PI-asin(tr))
math_EulerMisorientation = acos(math_limit(cosTheta,-1.0_pReal,1.0_pReal))
end function math_EulerMisorientation