From 8182a206b9d098fe8bd450a870312270ffe7097d Mon Sep 17 00:00:00 2001
From: Zeno Rogue <zeno@attnam.com>
Date: Fri, 3 Nov 2017 20:55:18 +0100
Subject: [PATCH] cubic Windy Plains

---
 control.cpp  |  2 +-
 hypgraph.cpp | 29 ++++++++++++++++++++++-------
 2 files changed, 23 insertions(+), 8 deletions(-)

diff --git a/control.cpp b/control.cpp
index 4cab0ff3..361d489e 100644
--- a/control.cpp
+++ b/control.cpp
@@ -345,7 +345,7 @@ void handleKeyNormal(int sym, int uni) {
     if((sym == SDLK_DELETE || sym == SDLK_KP_PERIOD || sym == 'g') && uni != 'G' && uni != 'G'-64) 
       movepcto(MD_DROP, 1);
     if(sym == 't' && uni != 'T' && uni != 'T'-64 && canmove) {
-      if(playermoved && items[itStrongWind]) {
+      if(playermoved && items[itStrongWind]) { 
         cell *c = whirlwind::jumpDestination(cwt.c);
         if(c) centerover = c;
         }
diff --git a/hypgraph.cpp b/hypgraph.cpp
index 192ad701..f4f84283 100644
--- a/hypgraph.cpp
+++ b/hypgraph.cpp
@@ -402,10 +402,16 @@ void drawEuclidean() {
     pid = decodeId(centerover->master);
   else
     decodeMaster(centerover->master, px, py);
-  
+
   int minsx = mindx-1, maxsx=maxdx+1, minsy=mindy-1, maxsy=maxdy+1;
   mindx=maxdx=mindy=maxdy=0;
   
+  static ld centerd;
+  
+  transmatrix View0 = View;
+  
+  ld cellrad = vid.radius / (EUCSCALE + vid.alphax);
+  
   for(int dx=minsx; dx<=maxsx; dx++)
   for(int dy=minsy; dy<=maxsy; dy++) {
     reclevel = eudist(dx, dy);
@@ -423,7 +429,13 @@ void drawEuclidean() {
       Mat = eumove(x, y);
       }
     if(!c) continue;
-    Mat = View * Mat;
+    Mat = View0 * Mat;
+    
+    if(torus) {
+      ld locald = (Mat[0][2] * Mat[0][2] + Mat[1][2] * Mat[1][2]);
+      if(c == centerover) centerd = locald;
+      else if(locald < centerd) centerd = locald, centerover = c, View = View0 * eumove(dx, dy); 
+      }
     
     // Mat[0][0] = -1;
     // Mat[1][1] = -1;
@@ -440,10 +452,10 @@ void drawEuclidean() {
       if(dx > maxdx) maxdx = dx;
       if(dy > maxdy) maxdy = dy;
       }
-    
-    if(dodrawcell(c)) {
-      drawcell(c, Mat, 0, false);
-      }
+    if(cx >= -cellrad && cy >= -cellrad && cx < vid.xres+cellrad && cy < vid.yres+cellrad)
+      if(dodrawcell(c)) {
+        drawcell(c, Mat, 0, false);
+        }
     }
   }
 
@@ -457,7 +469,9 @@ void centerpc(ld aspd) {
   if(vid.sspeed >= 4.99) aspd = 1000;
   DEBB(DF_GRAPH, (debugfile,"center pc\n"));
   hyperpoint H = ypush(-vid.yshift) * sphereflip * tC0(cwtV);
-  if(H[0] == 0 && H[1] == 0) return; // either already centered or direction unknown
+  if(H[0] == 0 && H[1] == 0) {
+    return; // either already centered or direction unknown
+    }
   ld R = hdist0(H); // = sqrt(H[0] * H[0] + H[1] * H[1]);
   if(R < 1e-9) {
     /* if(playerfoundL && playerfoundR) {
@@ -475,6 +489,7 @@ void centerpc(ld aspd) {
     
     View[0][2] -= cwtV[0][2] * aspd / R;
     View[1][2] -= cwtV[1][2] * aspd / R;
+        
     }
   
   else {