From 674fa0edf8db245d0bb78f95b87b06dbd72ef645 Mon Sep 17 00:00:00 2001
From: Erich Eckner <git@eckner.net>
Date: Mon, 30 Jul 2018 16:04:48 +0200
Subject: romunit.pas: Fenstermitte zum Fenstern wird nun nicht am Maximum,
 sonder am Halbwert des Peak-to-Peak festgelegt

---
 romunit.pas | 33 +++++++++++++++++++++++----------
 1 file changed, 23 insertions(+), 10 deletions(-)

diff --git a/romunit.pas b/romunit.pas
index 28e0df5..bfd4ca9 100644
--- a/romunit.pas
+++ b/romunit.pas
@@ -1063,7 +1063,8 @@ procedure fenstern(var dat: tExtPointArray; breite: extended; alteMitte: boolean
 var
   i,j,len: longint;
   extrema: tLongintArray;
-  pp,mpp:  extended;
+  pps:     tExtendedArray;
+  mpp:     extended;
 begin
   if not alteMitte then begin
     setlength(extrema,0);
@@ -1077,19 +1078,31 @@ begin
         inc(len);
       end;
     setlength(extrema,len);
-    fensterMitte:=-1;
-    mpp:=-1;
+    setlength(pps,len);
     for i:=0 to length(extrema)-1 do begin
-      pp:=-1;
+      pps[i]:=-1;
       for j:=0 to length(extrema)-1 do
         if (abs(dat[extrema[j]]['x']-dat[extrema[i]]['x'])<2) and
-          (abs(dat[extrema[j]]['y']-dat[extrema[i]]['y'])>pp) then
-          pp:=abs(dat[extrema[j]]['y']-dat[extrema[i]]['y']);
-      if pp>mpp then begin
-        mpp:=pp;
-        fensterMitte:=extrema[i];
-      end;
+          (abs(dat[extrema[j]]['y']-dat[extrema[i]]['y'])>pps[i]) then
+          pps[i]:=abs(dat[extrema[j]]['y']-dat[extrema[i]]['y']);
     end;
+    mpp:=pps[0];
+    for i:=0 to length(pps)-1 do
+      if pps[i]>mpp then
+        mpp:=pps[i];
+    i:=0;
+    while (i<length(pps)) and
+      (pps[i]<mpp/2) do
+      inc(i);
+    j:=length(pps)-1;
+    while (j>=0) and
+      (pps[j]<mpp/2) do
+      dec(j);
+    mpp:=(dat[extrema[i]]['x']+dat[extrema[j]]['x'])/2;
+    fensterMitte:=0;
+    while (fensterMitte<length(dat)) and
+      (dat[fensterMitte]['x']<mpp) do
+      inc(fensterMitte);
   end;
 
   for i:=0 to length(dat)-1 do
-- 
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