[MF]修改贪吃蛇显示错误

game/贪吃蛇/snake_game.html

@@ -32,6 +32,10 @@
         }
 
         #snake-canvas-container {
+            /* === 修改点 1：显式设置宽度和高度，使其与 canvas 元素尺寸一致 === */
+            width: 600px; /* 与 JavaScript 中 CANVAS_WIDTH 匹配 */
+            height: 400px; /* 与 JavaScript 中 CANVAS_HEIGHT 匹配 */
+            
             position: relative;
             border: 5px solid #00f2fe;
             box-shadow: 0 0 20px #00f2fe, 0 0 40px #00f2fe;
@@ -43,6 +47,9 @@
         #snakeCanvas {
             background-color: #333;
             display: block;
+            /* === 修改点 1：确保 canvas 实际宽度和高度与容器一致 === */
+            width: 100%; 
+            height: 100%;
         }
 
         #game-info-panel {
@@ -697,31 +704,69 @@
         }
 
         function generateFood() {
+            // 计算可用的网格单元数量
+            const numCols = CANVAS_WIDTH / GRID_SIZE;
+            const numRows = CANVAS_HEIGHT / GRID_SIZE;
+
+            // 循环直到找到一个不在蛇身体上的食物位置
+            let newFoodX, newFoodY;
+            do {
+                newFoodX = Math.floor(Math.random() * numCols);
+                newFoodY = Math.floor(Math.random() * numRows);
+            } while (isFoodOnSnake(newFoodX, newFoodY)); // 检查是否与蛇重叠
+
             food = {
-                x: Math.floor(Math.random() * (CANVAS_WIDTH / GRID_SIZE)),
-                y: Math.floor(Math.random() * (CANVAS_HEIGHT / GRID_SIZE))
+                x: newFoodX,
+                y: newFoodY
             };
-            // 确保食物不生成在蛇的身体上
+        }
+
+        // 辅助函数：检查给定坐标是否在蛇的身体上
+        function isFoodOnSnake(x, y) {
             for (let i = 0; i < snake.length; i++) {
-                if (food.x === snake[i].x && food.y === snake[i].y) {
-                    generateFood(); // 重新生成
+                if (x === snake[i].x && y === snake[i].y) {
+                    return true;
                 }
             }
+            return false;
         }
 
         function drawGame() {
             // 清空 snakeCanvas
             snakeCtx.clearRect(0, 0, CANVAS_WIDTH, CANVAS_HEIGHT);
             
+            // === 修改点 2：绘制网格线 (增强视觉效果) ===
+            snakeCtx.strokeStyle = '#444'; // 深灰色网格线
+            snakeCtx.lineWidth = 0.5; // 网格线细一点
+            for (let x = 0; x < CANVAS_WIDTH; x += GRID_SIZE) {
+                snakeCtx.beginPath();
+                snakeCtx.moveTo(x, 0);
+                snakeCtx.lineTo(x, CANVAS_HEIGHT);
+                snakeCtx.stroke();
+            }
+            for (let y = 0; y < CANVAS_HEIGHT; y += GRID_SIZE) {
+                snakeCtx.beginPath();
+                snakeCtx.moveTo(0, y);
+                snakeCtx.lineTo(CANVAS_WIDTH, y);
+                snakeCtx.stroke();
+            }
+
             // 绘制食物
-            snakeCtx.fillStyle = '#ff3333'; // 红色
+            snakeCtx.fillStyle = '#ff4444'; // 更鲜艳的红色
             snakeCtx.fillRect(food.x * GRID_SIZE, food.y * GRID_SIZE, GRID_SIZE, GRID_SIZE);
+            snakeCtx.strokeStyle = '#ff0000'; // 食物边框
+            snakeCtx.lineWidth = 2; // 微粗边框
+            snakeCtx.strokeRect(food.x * GRID_SIZE, food.y * GRID_SIZE, GRID_SIZE, GRID_SIZE);
+
 
             // 绘制蛇
             for (let i = 0; i < snake.length; i++) {
-                snakeCtx.fillStyle = (i === 0) ? '#00cc00' : '#009900'; // 蛇头绿色，身体深绿
+                snakeCtx.fillStyle = (i === 0) ? '#33ff33' : '#00cc00'; // 蛇头亮绿色，身体普通绿色
                 snakeCtx.fillRect(snake[i].x * GRID_SIZE, snake[i].y * GRID_SIZE, GRID_SIZE, GRID_SIZE);
-                snakeCtx.strokeStyle = '#222'; // 边框
+               
+                // === 修改点 2：增强蛇身的方格显示效果：添加描边 ===
+                snakeCtx.strokeStyle = '#006600'; // 深绿色描边
+                snakeCtx.lineWidth = 1.5; // 描边宽度
                 snakeCtx.strokeRect(snake[i].x * GRID_SIZE, snake[i].y * GRID_SIZE, GRID_SIZE, GRID_SIZE);
             }