more editor stuff

editor/client/public/map/map.js

@@ -74,6 +74,7 @@
   let zoomWorldH = 20;
   let dirty = false;
   let hoverTile = null;
+  let fillMode = false;
 
   let mapRenderer = null;
   let terrainMesh = null;
@@ -462,13 +463,63 @@
     renderPreview();
   }
 
+  // 4-connected flood fill of same-type tiles at the current Z-level,
+  // starting from (startX, startY), replacing them with selectedShape.
+  function floodFill(startX, startY) {
+    const targetType = tiles[ChunkTerrain.tileIndex(startX, startY, currentZLevel)];
+    if(targetType === selectedShape) return;
+
+    const stack = [[startX, startY]];
+    const visited = new Set();
+    while(stack.length) {
+      const [x, y] = stack.pop();
+      const key = `${x},${y}`;
+      if(visited.has(key)) continue;
+      if(x < 0 || x >= ChunkTerrain.CHUNK_WIDTH || y < 0 || y >= ChunkTerrain.CHUNK_HEIGHT) continue;
+      visited.add(key);
+
+      const idx = ChunkTerrain.tileIndex(x, y, currentZLevel);
+      if(tiles[idx] !== targetType) continue;
+      tiles[idx] = selectedShape;
+      stack.push([x + 1, y], [x - 1, y], [x, y + 1], [x, y - 1]);
+    }
+  }
+
+  function fillAt(e) {
+    const canvas = document.getElementById("gridCanvas");
+    const t = canvasToTile(e, canvas);
+    if(!t) return;
+    pushUndo();
+    floodFill(t.x, t.y);
+    markDirty();
+    renderGrid();
+    renderPreview();
+  }
+
   function rebuildTerrainMesh() {
     const floats = ChunkTerrain.buildTerrainVerts(tiles);
     terrainMesh = floats.length ? mapRenderer.createMesh(floats) : null;
   }
 
+  // Keeps the preview canvas's backing-store resolution matched to its
+  // actual displayed CSS size (times devicePixelRatio) - the canvas
+  // otherwise stays at its fixed width/height attributes (512x512) while
+  // CSS stretches it to fill the column, which upscales and blurs the
+  // WebGL output on wider or high-DPI screens.
+  function resizePreviewCanvas() {
+    const canvas = document.getElementById("previewCanvas");
+    const dpr = window.devicePixelRatio || 1;
+    const displayWidth = Math.max(1, Math.round(canvas.clientWidth * dpr));
+    const displayHeight = Math.max(1, Math.round(canvas.clientHeight * dpr));
+    if(canvas.width !== displayWidth || canvas.height !== displayHeight) {
+      canvas.width = displayWidth;
+      canvas.height = displayHeight;
+    }
+  }
+
   async function renderPreview() {
     if(!mapRenderer) return;
+    resizePreviewCanvas();
     rebuildTerrainMesh();
 
     const models = [];
@@ -604,6 +655,11 @@
     let draggingMeshIndex = -1;
 
     gridCanvas.addEventListener("mousedown", (e) => {
+      if(fillMode) {
+        fillAt(e);
+        return;
+      }
+
       const hit = hitTestMesh(e, gridCanvas);
       pushUndo();
       if(hit !== -1) {
@@ -657,8 +713,18 @@
     document.getElementById("navUp").addEventListener("click", () => goToChunk(coord.x, coord.y, coord.z + 1));
     document.getElementById("navDown").addEventListener("click", () => goToChunk(coord.x, coord.y, coord.z - 1));
 
-    document.getElementById("btnSave").addEventListener("click", () => {
+    function runSave() {
       saveChunk().catch((e) => updateStatus(`Save failed: ${e.message}`, true));
+    }
+
+    document.getElementById("btnSave").addEventListener("click", runSave);
+
+    document.getElementById("fillToggle").addEventListener("click", () => {
+      fillMode = !fillMode;
+      const btn = document.getElementById("fillToggle");
+      btn.textContent = fillMode ? "Fill: On" : "Fill: Off";
+      btn.classList.toggle("btn-secondary", fillMode);
+      btn.classList.toggle("btn-outline-secondary", !fillMode);
     });
 
     document.getElementById("btnAddMesh").addEventListener("click", () => {
@@ -683,10 +749,17 @@
       renderPreview();
     }, { passive: false });
 
+    window.addEventListener("resize", () => renderPreview());
+
     window.addEventListener("keydown", (e) => {
-      if((e.ctrlKey || e.metaKey) && e.key.toLowerCase() === "z") {
+      if(!(e.ctrlKey || e.metaKey)) return;
+      const key = e.key.toLowerCase();
+      if(key === "z") {
         e.preventDefault();
         undo();
+      } else if(key === "s") {
+        e.preventDefault();
+        runSave();
       }
     });
   }