Mapster32: more or less fix the auto wall-alignment feature ([.]/[,]).

- Run it twice, since the first one is wrong.
- Warn when attempting to align based on a top-oriented wall. When the
  sequence of walls to align has "windows", only the bottom parts will
  be correct.
- Make the modifiers actually useful:
  * Pressing SHIFT aligns at most one wall, remove the old CTRL modifier.
  * The rest is as before: ALT makes the walls have (approximately) equal
    texture stretching, ['] (quote) aligns the immediate TROR-nextwalls.

git-svn-id: https://svn.eduke32.com/eduke32@3396 1a8010ca-5511-0410-912e-c29ae57300e0

polymer/eduke32/build/src/build.c

@@ -10368,6 +10368,9 @@ static int32_t GetWallBaseZ(int32_t wallnum)
     return z;
 }
 
+
+////////// AUTOMATIC WALL ALIGNMENT //////////
+
 static void AlignWalls(int32_t w0, int32_t z0, int32_t w1, int32_t z1, int32_t doxpanning)
 {
     int32_t n;
@@ -10395,8 +10398,8 @@ void AlignWallPoint2(int32_t w0)
 #define ALIGN_WALLS_CSTAT_MASK (4+8+256)
 
 // flags:
-//  1: recurse nextwalls
-//  2: iterate point2's
+//  1: more than once
+//  2: (unused)
 //  4: carry pixel width from first wall over to the rest
 //  8: align TROR nextwalls
 // 16: iterate lastwall()s (point2 in reverse)
@@ -10487,11 +10490,12 @@ int32_t AutoAlignWalls(int32_t w0, uint32_t flags, int32_t nrecurs)
                 wall[w1].cstat |= cstat0;
                 numaligned++;
 
+                if ((flags&1)==0)
+                    return 1;
+
                 //if wall was 1-sided, no need to recurse
                 if (wall[w1].nextwall < 0)
                 {
-                    if (!(flags&2))
-                        break;
                     w0 = w1;
                     z0 = GetWallBaseZ(w0);
                     w1 = totheleft ? lastwall(w0) : wall[w0].point2;
@@ -10499,12 +10503,11 @@ int32_t AutoAlignWalls(int32_t w0, uint32_t flags, int32_t nrecurs)
                     continue;
                 }
 
-                if (flags&1)
                 AutoAlignWalls(w1, flags, nrecurs+1);
             }
         }
 
-        if (wall[w1].nextwall < 0 || !(flags&2))
+        if (wall[w1].nextwall < 0)
             break;
         w1 = totheleft ? lastwall(wall[w1].nextwall) : NEXTWALL(w1).point2;
     }

polymer/eduke32/source/astub.c

@@ -5242,18 +5242,22 @@ static void Keys3d(void)
             ShowFileText("sthelp.hlp");
     }
 
-    // . Search & fix panning to the right (3D)
+    // [.] or [,]: Search & fix panning to the right or left (3D)
     if (AIMING_AT_WALL_OR_MASK && ((tsign=PRESSED_KEYSC(PERIOD)) || PRESSED_KEYSC(COMMA)))
     {
-        uint32_t flags = eitherCTRL | ((!eitherSHIFT)<<1) | (tsign?0:16) |
+        uint32_t flags = (!eitherSHIFT) | (tsign?0:16) |
             (eitherALT<<2) | ((!!keystatus[KEYSC_QUOTE])<<3);
+
         int32_t naligned=AutoAlignWalls(searchwall, flags, 0);
+        // Do it a second time because the first one is wrong. FIXME!!!
+        AutoAlignWalls(searchwall, flags, 0);
+
         message("Aligned %d wall%s based on wall %d%s%s%s%s", naligned,
-                naligned==1?"":"s", searchwall,
-                eitherCTRL?", recursing nextwalls":"",
-                !eitherSHIFT?", iterating point2s":"",
-                eitherALT?", aligning xrepeats":"",
-                keystatus[KEYSC_QUOTE]?", aligning TROR-nextwalls":"");
+                naligned==1 ? "" : "s", searchwall,
+                !eitherSHIFT ? " iteratively" : "",
+                eitherALT ? ", aligning xrepeats" : "",
+                keystatus[KEYSC_QUOTE] ? ", aligning TROR-nextwalls" : "",
+                (wall[searchwall].cstat&4) ? "" : ". WARNING: top-aligned");
     }
 
     tsign = 0;