diff options
Diffstat (limited to 'texmf-dist/scripts/ketpic/ketlib/ketpicscifiles6/Zperspt.sci')
-rwxr-xr-x | texmf-dist/scripts/ketpic/ketlib/ketpicscifiles6/Zperspt.sci | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/texmf-dist/scripts/ketpic/ketlib/ketpicscifiles6/Zperspt.sci b/texmf-dist/scripts/ketpic/ketlib/ketpicscifiles6/Zperspt.sci new file mode 100755 index 00000000..13601556 --- /dev/null +++ b/texmf-dist/scripts/ketpic/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 + |