Same-row belt feed into an uphill low end draws as two capped ends (t67)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

test/t_joins.js

@@ -123,15 +123,15 @@ check('a flat belt picks the same-row uphill inlet before the below-low-end exce
   for(const n of [b,b+1,b-BW+1]){blockP[n]=n===b?BP_BELT:BP_BELT_UP;blockV[n]=1;}
   return endJoin(10,10,1)===(b+1)*2&&endJoin(11,9,0)===-1;
 })()`));
-check('same-row uphill low end draws the drop in placed and planned geometry',run(`(()=>{
+check('same-row uphill low end draws as two capped ends in placed and planned geometry',run(`(()=>{
   blockP.fill(0);blockV.fill(0);const b=10*BW+10;
   const p=new Map([[b,[BP_BELT_UP,1]],[b-1,[BP_BELT,1]]]);
   const j=slopeBeltConnections(10,10,BP_BELT_UP,p);
-  return j===129&&slopeBeltShape(40.5,43,b,j,BP_BELT_UP)<0&&flatBeltCaps(b-1,p)===1;
+  return j===0&&endJoin(10,10,0,p)>=0&&flatBeltCaps(b-1,p)===3;
 })()`));
-check('uphill same-row slope joins draw a high elbow and a low drop',run(`(()=>{
+check('uphill slopes side by side on one row are joined but drawn as two capped ends',run(`(()=>{
   blockP.fill(0);blockV.fill(0);const b=10*BW+10,p=new Map([[b,[BP_BELT_UP,1]],[b+1,[BP_BELT_UP,1]]]);
-  return slopeBeltConnections(10,10,BP_BELT_UP,p)===2&&slopeBeltConnections(11,10,BP_BELT_UP,p)===129;
+  return endJoin(10,10,1,p)>=0&&slopeBeltConnections(10,10,BP_BELT_UP,p)===0&&slopeBeltConnections(11,10,BP_BELT_UP,p)===0;
 })()`));
 // Downhill face-to-face transfers (screens always travel downhill when placed).
 for(const grade of [-1,1])for(const filter of [false,true])for(const outgoing of [false,true])for(const joined of [false,true]) {

test/t_smooth.py

@@ -212,7 +212,7 @@ with sync_playwright() as p:
       } finally {slopeDetailAt=detail;performance.now=now;}
     }""")
     for look, (joined, free) in drops.items():
-        check(f'{look}: the same-row uphill inlet draws its drop above the low face', joined != free and joined[2] < free[2], [joined, free])
+        check(f'{look}: the same-row uphill inlet is a drop, drawn like a free low end', joined == free, [joined, free])
     filter_plans = ev("""() => {
       const saved={...GAME},original=slopeBeltConnections,seen=[];
       try {