Holy shit! It works

lib/game.dart

@@ -1,4 +1,3 @@
-import 'dart:developer';
 import 'dart:math' as math;
 import 'package:dartterm/assets.dart';
 import 'package:dartterm/gen/generator.dart';
@@ -29,11 +28,9 @@ void main() async {
   int seed = 0;
 
   while (true) {
-    Vault output = Generator(math.Random(seed), vaults).generate(Requirement(
+    clear();
-        32,
+    Vault output = Generator(math.Random(seed), vaults)
-        24,
+        .generate(Requirement(16, 32, 16, 24, DirectionSet({})), false);
-        DirectionSet(
-            {Direction.up, Direction.left, Direction.right, Direction.down})));
     var w = output.vx;
     var h = output.vy;
     for (var y = 0; y < h; y++) {
@@ -55,7 +52,7 @@ void main() async {
     }
     inpLoop:
     await for (var inp in rawInput()) {
-      print(inp);
+      skreek("$inp");
       switch (inp) {
         case Keystroke(text: "a"):
           seed -= 1;

lib/gen/generator.dart

@@ -20,10 +20,12 @@ class Generator {
 
   Generator(this._random, this._vaults);
 
-  Vault generate(Requirement requirement) {
+  Vault generate(Requirement requirement, bool canBeVault) {
-    Vault? suggested = _suggest(vaultTries, requirement);
+    if (canBeVault) {
-    if (suggested != null) {
+      Vault? suggested = _suggest(vaultTries, requirement);
-      return suggested;
+      if (suggested != null) {
+        return suggested;
+      }
     }
 
     // First of all: randomize orientation
@@ -32,45 +34,107 @@ class Generator {
 
     // Try to make vx the long axis if possible
     var req2 = unReorientRequirement(requirement, orientation);
-    if (req2.vy > (req2.vx - 2) * 3 / 2) {
+    if (req2.vyMax > (req2.vxMax - 2) * 3 / 2) {
       orientation = (orientation + 2) % 8; // rotate once more
     }
+    // if only one of "left" and "right" needs to be smooth, prioritize right
+    // as left is generated first
     req2 = unReorientRequirement(requirement, orientation);
+    if (req2.smooth.directions.contains(Direction.left) &&
+        req2.smooth.directions.contains(Direction.right)) {
+      orientation = (orientation + 4) % 8;
+    }
 
+    req2 = unReorientRequirement(requirement, orientation);
     var out2 = _generate(req2);
     var out1 = reorientVault(out2, orientation);
 
     // log("$orientation ${requirement.vx} ${requirement.vy} ${req2.vx} ${req2.vy} ${out2.vx} ${out2.vy} ${out1.vx} ${out1.vy}");
-    assert(out1.vx == requirement.vx);
+    assert(out1.vx >= requirement.vxMin && out1.vx <= requirement.vxMax);
-    assert(out1.vy == requirement.vy);
+    assert(out1.vy >= requirement.vyMin && out1.vy <= requirement.vyMax);
+    assert(out1.smooth.directions.containsAll(requirement.smooth.directions));
     return out1;
   }
 
   Vault _generate(Requirement req) {
-    var vx = req.vx;
+    var vxMin = req.vxMin;
-    var vy = req.vy;
+    var vyMin = req.vyMin;
-    var v = Vault.blank(vx, vy, req.smooth, VaultTile.wall);
+    var vxMax = req.vxMax;
+    var vyMax = req.vyMax;
 
-    if (vx < 2 || vy < 2) {
+    var smoothUp = req.smooth.directions.contains(Direction.up);
-    } else if (vx < 9 || (vx - 2) * (vy - 2) < 12) {
+    var smoothDown = req.smooth.directions.contains(Direction.down);
-      var v2 = Vault.blank(vx - 2, vy - 2, req.smooth, VaultTile.bspfloor);
+    var smoothUpDown = smoothUp && smoothDown;
+
+    // var vxRand = _random.nextInt(vxMax - vxMin) + vxMin;
+    var vyRand = _random.nextInt(vyMax + 1 - vyMin) + vyMin;
+
+    if (vxMax < 2 || vyMax < 2) {
+      return Vault.blank(vxMax, vyRand, req.smooth, VaultTile.wall);
+    } else if (vxMax < 9 || (vxMax - 2) * (vyMax - 2) < 12) {
+      var v2 =
+          Vault.blank(vxMax - 2, vyMax - 2, req.smooth, VaultTile.bspfloor);
+      var v = Vault.blank(vxMax, vyMax, req.smooth, VaultTile.wall);
       v.blitFrom(v2, 1, 1);
+      return v;
     } else {
-      // pick a split point
+      var leftReq = Requirement(
-      var splitVx = _random.nextInt(vx - 8) + 4;
+          math.max(vxMin - 4, 2), vxMax - 4, vyMin, vyMax, req.smooth.clone());
+      leftReq.smooth.directions.add(Direction.right);
+      var leftChild = generate(leftReq, true);
 
-      var reqLeft = Requirement(splitVx, vy, req.smooth.clone());
+      var vyMinRight = vyMin;
-      reqLeft.smooth.directions.add(Direction.right);
+      var vyMaxRight = vyMax;
-      var reqRight = Requirement((vx - splitVx + 1), vy, req.smooth.clone());
-      reqRight.smooth.directions.add(Direction.left);
 
-      var vaultLeft = generate(reqLeft);
+      if (smoothUpDown) {
-      var vaultRight = generate(reqRight);
+        vyMinRight = leftChild.vy;
-      v.blitFrom(vaultLeft, 0, 0);
+        vyMaxRight = leftChild.vy;
-      v.blitFrom(vaultRight, splitVx - 1, 0);
+      }
+
+      var rightReq = Requirement(
+        vxMin - (leftChild.vx - 1),
+        vxMax - (leftChild.vx - 1),
+        vyMinRight,
+        vyMaxRight,
+        req.smooth.clone(),
+      );
+      rightReq.smooth.directions.add(Direction.left);
+      var rightChild = generate(rightReq, true);
+
+      var vxTotal = leftChild.vx + rightChild.vx - 1;
+      var vyTotal = math.max(leftChild.vy, rightChild.vy);
+
+      if (smoothUp) {
+        var v =
+            Vault.blank(vxTotal, vyTotal, req.smooth.clone(), VaultTile.wall);
+        v.blitFrom(leftChild, 0, 0);
+        v.blitFrom(rightChild, leftChild.vx - 1, 0);
+        return v;
+      }
+      if (smoothDown) {
+        var v =
+            Vault.blank(vxTotal, vyTotal, req.smooth.clone(), VaultTile.wall);
+        v.blitFrom(leftChild, 0, vyTotal - leftChild.vy);
+        v.blitFrom(rightChild, leftChild.vx - 1, vyTotal - rightChild.vy);
+        return v;
+      }
+
+      // no smoothing reqs
+      // min: ensure some overlap
+      var vyTMax = math.min(vyMax, leftChild.vy + rightChild.vy - 3);
+      if (vyTMax > vyTotal) {
+        vyTotal += _random.nextInt(vyTMax - vyTotal);
+      }
+      var v = Vault.blank(vxTotal, vyTotal, req.smooth.clone(), VaultTile.wall);
+      if (_random.nextBool()) {
+        v.blitFrom(leftChild, 0, 0);
+        v.blitFrom(rightChild, leftChild.vx - 1, vyTotal - rightChild.vy);
+      } else {
+        v.blitFrom(leftChild, 0, vyTotal - leftChild.vy);
+        v.blitFrom(rightChild, leftChild.vx - 1, 0);
+      }
+      return v;
     }
-
-    return v;
   }
 
   Vault? _suggest(int tries, Requirement req) {
@@ -100,27 +164,19 @@ class Generator {
   }
 
   Vault? _tidy(Vault vault, Requirement req) {
-    if (vault.vx > req.vx || vault.vy > req.vy) {
+    if (vault.vx > req.vxMax || vault.vy > req.vyMax) {
       return null;
     }
-    if (vault.vx < req.vx / 2 || vault.vy < req.vy / 2) {
+    if (vault.vx < req.vxMin || vault.vy < req.vyMin) {
       return null;
     }
     if (!vault.smooth.directions.containsAll(req.smooth.directions)) {
       return null;
     }
+    return vault;
 
+    /*
     var rsd = req.smooth.directions;
-    bool mustFillX =
-        rsd.contains(Direction.left) && rsd.contains(Direction.right);
-    if (vault.vx != req.vx && mustFillX) {
-      return null;
-    }
-    bool mustFillY = rsd.contains(Direction.up) && rsd.contains(Direction.down);
-    if (vault.vy != req.vy && mustFillY) {
-      return null;
-    }
-
     Vault full = Vault.blank(req.vx, req.vy, req.smooth, VaultTile.wall);
     int vx = vault.vx;
     int dx;
@@ -143,5 +199,6 @@ class Generator {
     }
     full.blitFrom(vault, dx, dy);
     return full;
+    */
   }
 }

lib/gen/requirement.dart

@@ -1,20 +1,25 @@
 part of 'generator.dart';
 
 class Requirement {
-  final int vx, vy;
+  final int vxMin, vxMax, vyMin, vyMax;
   final DirectionSet smooth;
 
-  Requirement(this.vx, this.vy, this.smooth);
+  Requirement(this.vxMin, this.vxMax, this.vyMin, this.vyMax, this.smooth) {
+    assert(vxMin <= vxMax);
+    assert(vyMin <= vyMax);
+    assert(vxMax > 2);
+    assert(vyMax > 2);
+  }
 
   Requirement flip() {
-    return Requirement(vx, vy, smooth.flip());
+    return Requirement(vxMin, vxMax, vyMin, vyMax, smooth.flip());
   }
 
   Requirement rotateLeft() {
-    return Requirement(vy, vx, smooth.rotateLeft());
+    return Requirement(vyMin, vyMax, vxMin, vxMax, smooth.rotateLeft());
   }
 
   Requirement rotateRight() {
-    return Requirement(vy, vx, smooth.rotateRight());
+    return Requirement(vyMin, vyMax, vxMin, vxMax, smooth.rotateRight());
   }
 }

lib/gen/vaults.dart

@@ -31,7 +31,9 @@ class Vaults {
     var tiles = [
       for (var y = r.rect.top; y < r.rect.bottom; y++)
         for (var x = r.rect.left; x < r.rect.right; x++)
-          b.get(x, y) ?? VaultTile.wall
+          r.points.contains((x, y))
+              ? (b.get(x, y) ?? VaultTile.wall)
+              : VaultTile.wall
     ];
     DirectionSet smooth = DirectionSet(
         {Direction.up, Direction.left, Direction.right, Direction.down});

lib/skreek.dart

@@ -1,4 +1,6 @@
+import 'package:flutter/foundation.dart';
+
 void skreek(String msg) {
   // ignore: avoid_print
-  print("[skreek] $msg");
+  debugPrint("[skreek] $msg");
 }