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author | Norbert Preining <norbert@preining.info> | 2017-10-14 11:43:11 +0900 |
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committer | Norbert Preining <norbert@preining.info> | 2017-10-14 11:43:11 +0900 |
commit | dc71274f16f7ff65145e034900f582b62453a033 (patch) | |
tree | a71452364cbe1a03feb6a84cdfd09eedae861590 /texmf-dist/scripts/ketcindy/ketlib/ketpicscifiles6/Zperspt.sci | |
parent | aecda53b09be64698e9e5dcbf40f0fe289b37e2e (diff) |
rename and update ketpic -> ketcindy
Diffstat (limited to 'texmf-dist/scripts/ketcindy/ketlib/ketpicscifiles6/Zperspt.sci')
-rw-r--r-- | texmf-dist/scripts/ketcindy/ketlib/ketpicscifiles6/Zperspt.sci | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/texmf-dist/scripts/ketcindy/ketlib/ketpicscifiles6/Zperspt.sci b/texmf-dist/scripts/ketcindy/ketlib/ketpicscifiles6/Zperspt.sci new file mode 100644 index 00000000..13601556 --- /dev/null +++ b/texmf-dist/scripts/ketcindy/ketlib/ketpicscifiles6/Zperspt.sci @@ -0,0 +1,20 @@ +// 08.08.12 +// 10.01.02 + +function X3=Zperspt(P) + + global FocusPoint EyePoint + + Tmp=P-FocusPoint; + X1=Tmp(1); Y1=Tmp(2); Z1=Tmp(3); + Tmp=EyePoint-FocusPoint; + E1=Tmp(1); F1=Tmp(2); G1=Tmp(3); + Ca=E1/sqrt(E1^2+F1^2); + Sa=F1/sqrt(E1^2+F1^2); + X2=X1*Ca+Y1*Sa; Y2=-X1*Sa+Y1*Ca; Z2=Z1; + E2=E1*Ca+F1*Sa; F2=-E1*Sa+F1*Ca; G2=G1; + Cb=E2/sqrt(E2^2+G2^2); + Sb=G2/sqrt(E2^2+G2^2); + X3=X2*Cb+Z2*Sb; +endfunction + |