summaryrefslogtreecommitdiff
path: root/texmf-dist/scripts/ketcindy/ketlib/ketpic2escifiles6/Perspt.sci
diff options
context:
space:
mode:
authorNorbert Preining <norbert@preining.info>2017-10-14 11:43:11 +0900
committerNorbert Preining <norbert@preining.info>2017-10-14 11:43:11 +0900
commitdc71274f16f7ff65145e034900f582b62453a033 (patch)
treea71452364cbe1a03feb6a84cdfd09eedae861590 /texmf-dist/scripts/ketcindy/ketlib/ketpic2escifiles6/Perspt.sci
parentaecda53b09be64698e9e5dcbf40f0fe289b37e2e (diff)
rename and update ketpic -> ketcindy
Diffstat (limited to 'texmf-dist/scripts/ketcindy/ketlib/ketpic2escifiles6/Perspt.sci')
-rw-r--r--texmf-dist/scripts/ketcindy/ketlib/ketpic2escifiles6/Perspt.sci21
1 files changed, 21 insertions, 0 deletions
diff --git a/texmf-dist/scripts/ketcindy/ketlib/ketpic2escifiles6/Perspt.sci b/texmf-dist/scripts/ketcindy/ketlib/ketpic2escifiles6/Perspt.sci
new file mode 100644
index 00000000..eb689ffe
--- /dev/null
+++ b/texmf-dist/scripts/ketcindy/ketlib/ketpic2escifiles6/Perspt.sci
@@ -0,0 +1,21 @@
+// 08.08.12
+
+function Out=Perspt(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; Y3=Y2; Z3=-X2*Sb+Z2*Cb;
+ E3=E2*Cb+G2*Sb; F3=F2; G3=-E2*Sb+G2*Cb;
+ Yz=E3/(E3-X3)*Y3;
+ Zz=E3/(E3-X3)*Z3;
+ Out=[Yz,Zz];
+endfunction
+