change a lot

module/block.py

@@ -1,4 +1,10 @@
-from module import COLORS
+from module import COLORS, BLOCK_SIZE, PLAYER_SIZE
+from typing import TYPE_CHECKING
+
+# 解决循环导入
+if TYPE_CHECKING:
+    from module.player import Player
+
 
 class Block:
     id = ''
@@ -11,11 +17,45 @@ class Block:
         self.x = x
         self.y = y
 
-    def get_screen_x(self):
-        return self.x * 20
+    def get_screen_x(self) -> int:
+        return self.x * BLOCK_SIZE
 
-    def get_screen_y(self):
-        return self.y * 20
+    def get_screen_y(self) -> int:
+        return self.y * BLOCK_SIZE
+
+    def check_collision(self, player: 'Player') -> bool:
+        # 将玩家的碰撞体积看作为一个正方形，其形心坐标为 (player.x, player.y)
+        # 方块的坐标，即其的 (x, y) 是在 world 中的下标，需要将其转换为坐标
+        # 由于 下标*边长 计算得到的是这个方块左上角的坐标，所以要添加偏移量
+        # 计算得到形心坐标，偏移量是方块大小的一半
+        real_x = self.x * BLOCK_SIZE + BLOCK_SIZE / 2
+        real_y = self.y * BLOCK_SIZE + BLOCK_SIZE / 2
+        # 判断其是否碰撞仅需看其两形心间的距离，如果玩家的形心落在了方块碰撞
+        # 区域内，则发生碰撞，否则不发生碰撞。方块碰撞检测区域位于同形心坐标
+        # 边长为 PLAYER_SIZE + BLOCK_SIZE 的矩形区域
+        # 定界：
+        left = real_x - (PLAYER_SIZE + BLOCK_SIZE) / 2
+        right = real_x + (PLAYER_SIZE + BLOCK_SIZE) / 2
+
+        top = real_y - (PLAYER_SIZE + BLOCK_SIZE) / 2
+        bottom = real_y + (PLAYER_SIZE + BLOCK_SIZE) / 2
+        # 判碰撞：
+        return left < player.x < right and top < player.y < bottom
+
+    def get_collision_surface(self) -> tuple[int]:
+        # 获得方块表面界限（碰撞面）
+        # 上、右、下、左
+        real_x = self.x * BLOCK_SIZE + BLOCK_SIZE / 2
+        real_y = self.y * BLOCK_SIZE + BLOCK_SIZE / 2
+
+        top = real_y - BLOCK_SIZE / 2
+        bottom = real_y + BLOCK_SIZE / 2
+        left = real_x - BLOCK_SIZE / 2
+        right = real_x + BLOCK_SIZE / 2
+        return top, right, bottom, left
+
+    def get_center_vector(self):
+        return self.x * BLOCK_SIZE + BLOCK_SIZE / 2, self.y * BLOCK_SIZE + BLOCK_SIZE / 2
 
 
 class GrassBlock(Block):