[12] | 1 | MODULE vector |
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| 2 | USE genmod |
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| 3 | |
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| 4 | CONTAINS |
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| 5 | |
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| 6 | FUNCTION Norm(V) |
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| 7 | IMPLICIT NONE |
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| 8 | REAL(rstd) :: Norm |
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| 9 | REAL(rstd),INTENT(IN) :: V(3) |
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| 10 | |
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| 11 | Norm=sqrt(V(1)*V(1)+V(2)*V(2)+V(3)*V(3)) |
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| 12 | |
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| 13 | END FUNCTION Norm |
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| 14 | |
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| 15 | FUNCTION dot_product(V1,V2) |
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| 16 | IMPLICIT NONE |
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| 17 | REAL(rstd) :: dot_product |
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| 18 | REAL(rstd),INTENT(IN) :: V1(3) |
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| 19 | REAL(rstd),INTENT(IN) :: V2(3) |
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| 20 | |
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| 21 | dot_product=V1(1)*V2(1)+V1(2)*V2(2)+V1(3)*V2(3) |
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| 22 | |
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| 23 | END FUNCTION dot_product |
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| 24 | |
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| 25 | FUNCTION cross_product(V1,V2) |
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| 26 | IMPLICIT NONE |
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| 27 | REAL(rstd) ::cross_product(3) |
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| 28 | REAL(rstd),INTENT(IN) :: V1(3) |
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| 29 | REAL(rstd),INTENT(IN) :: V2(3) |
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| 30 | |
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| 31 | cross_product(1)=V1(2)*V2(3)-V1(3)*V2(2) |
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| 32 | cross_product(2)=V1(3)*V2(1)-V1(1)*V2(3) |
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| 33 | cross_product(3)=V1(1)*V2(2)-V1(2)*V2(1) |
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| 34 | |
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| 35 | END FUNCTION cross_product |
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| 36 | |
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| 37 | |
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| 38 | SUBROUTINE cross_product2(V1,V2,cross_product) |
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| 39 | IMPLICIT NONE |
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| 40 | REAL(rstd),INTENT(OUT):: cross_product(3) |
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| 41 | REAL(rstd),INTENT(IN) :: V1(3) |
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| 42 | REAL(rstd),INTENT(IN) :: V2(3) |
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| 43 | |
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| 44 | cross_product(1)=V1(2)*V2(3)-V1(3)*V2(2) |
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| 45 | cross_product(2)=V1(3)*V2(1)-V1(1)*V2(3) |
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| 46 | cross_product(3)=V1(1)*V2(2)-V1(2)*V2(1) |
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| 47 | |
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| 48 | END SUBROUTINE cross_product2 |
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| 49 | |
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| 50 | END MODULE vector |
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