Complete Cocos Creator port with level bundles, themes, and tooling.

Adds level prefabs, theme assets, audio, extensions, and deployment scripts for the Unity WebGL migration.

Co-authored-by: Cursor <cursoragent@cursor.com>

extensions/level-map-editor/dist/grid-math.js

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+'use strict';
+
+/** 与 Unity PPU=100、Grid CellSize (1,0.5,1) 一致（世界坐标 Y 向上） */
+const CELL_PIXEL = 100;
+const HALF_W = CELL_PIXEL * 0.5;
+const HALF_H = CELL_PIXEL * 0.25;
+
+const PANEL_HALF_W = HALF_W;
+const PANEL_HALF_H = HALF_H;
+
+function worldToCellXY(wx, wy) {
+    const cx = (wy / HALF_H + wx / HALF_W) * 0.5;
+    const cy = (wy / HALF_H - wx / HALF_W) * 0.5;
+    return { x: Math.round(cx), y: Math.round(cy) };
+}
+
+/** 世界坐标为格子中心时 → 格子索引（与 cellCenterCanvas 互逆） */
+function worldCenterToCellXY(wx, wy) {
+    return worldToCellXY(wx, wy - HALF_H);
+}
+
+function cellToWorldXY(cx, cy) {
+    return {
+        x: (cx - cy) * HALF_W,
+        y: (cx + cy) * HALF_H,
+    };
+}
+
+function cellCenterWorldXY(cx, cy) {
+    const w = cellToWorldXY(cx, cy);
+    return { x: w.x, y: w.y + HALF_H };
+}
+
+function cellKey(x, y) {
+    return `${x},${y}`;
+}
+
+/** 世界坐标 → Canvas（Y 向下，与 Unity/Cocos 预览一致） */
+function worldToCanvasXY(wx, wy, offsetX, offsetY) {
+    return {
+        x: offsetX + wx,
+        y: offsetY - wy,
+    };
+}
+
+/** 格子底顶点（Grid.CellToWorld） */
+function cellAnchorCanvas(cx, cy, offsetX, offsetY) {
+    const w = cellToWorldXY(cx, cy);
+    return worldToCanvasXY(w.x, w.y, offsetX, offsetY);
+}
+
+/** 格子中心（Unity Tilemap m_TileAnchor 0.5,0.5 → 精灵 pivot 对齐点） */
+function cellCenterCanvas(cx, cy, offsetX, offsetY) {
+    const w = cellToWorldXY(cx, cy);
+    return worldToCanvasXY(w.x, w.y + HALF_H, offsetX, offsetY);
+}
+
+/** 鼠标拾取：与贴图 pivot 相同，使用格子中心（worldCenterToCell） */
+function cellFromCanvas(mx, my, offsetX, offsetY) {
+    const wx = mx - offsetX;
+    const wyCenter = offsetY - my;
+    const c = worldCenterToCellXY(wx, wyCenter);
+    return { x: c.x, y: c.y, key: cellKey(c.x, c.y) };
+}
+
+function cellToCanvas(cx, cy, offsetX, offsetY) {
+    const a = cellAnchorCanvas(cx, cy, offsetX, offsetY);
+    return { px: a.x, py: a.y };
+}
+
+module.exports = {
+    CELL_PIXEL,
+    HALF_W,
+    HALF_H,
+    PANEL_HALF_W,
+    PANEL_HALF_H,
+    worldToCellXY,
+    worldCenterToCellXY,
+    cellToWorldXY,
+    cellCenterWorldXY,
+    cellKey,
+    worldToCanvasXY,
+    cellAnchorCanvas,
+    cellCenterCanvas,
+    cellFromCanvas,
+    cellToCanvas,
+};