Path finding

npc.py

@@ -0,0 +1,144 @@
+from sprite_object import *
+from random import randint, random, choice
+
+class NPC(AnimatedSprite):
+    def __init__(self, game, path='resources/sprites/npc/soldier/0.png', pos=(10.5, 5.5),
+                 scale=0.6, shift=0.38, animation_time=180):
+        super().__init__(game, path, pos, scale, shift, animation_time)
+        self.attack_images = self.get_images(self.path + '/attack')
+        self.death_images = self.get_images(self.path + '/death')
+        self.idle_images = self.get_images(self.path + '/idle')
+        self.pain_images = self.get_images(self.path + '/pain')
+        self.walk_images = self.get_images(self.path + '/walk')
+        
+        self.attack_dist = randint(3, 6)
+        self.speed = 0.02
+        self.size = 10
+        self.health = 100
+        self.attack_damage = 10
+        self.accuracy = 0.15
+        self.alive = True
+        self.pain = False
+        self.ray_cast_value = False
+        self.player_search_trigger = False
+        
+    def update(self):
+        self.check_animation_time()
+        self.get_sprite()
+        self.run_logic()
+        if DEBUG_MODE:
+            self.draw_ray_cast()
+            
+    def check_wall(self, x, y):
+        return (x, y) not in self.game.map.world_map
+    
+    def check_collision(self, dx, dy):
+        if self.check_wall(int(self.x + dx * self.size), int(self.y)):
+            self.x += dx
+        if self.check_wall(int(self.x), int(self.y + dy * self.size)):
+            self.y += dy
+            
+    def movement(self):
+        next_pos = self.game.pathfinding.get_path(self.map_pos, self.game.player.map_pos)
+        next_x, next_y = next_pos
+        if DEBUG_MODE:
+            pg.draw.rect(self.game.screen, 'blue', (100 * next_x, 100 * next_y, 100, 100))
+        if next_pos not in self.game.object_handler.npc_positions:
+            angle = math.atan2(next_y + 0.5 - self.y, next_x + 0.5 - self.x)
+            dx = math.cos(angle) * self.speed
+            dy = math.sin(angle) * self.speed
+            self.check_collision(dx, dy)
+            
+    def attack(self):
+        if self.animation_trigger:
+            pass
+        
+    def run_logic(self):
+        if self.alive:
+            self.ray_cast_value = self.ray_cast_player_npc()
+            self.animate(self.idle_images)
+            if self.ray_cast_value:
+                self.player_search_trigger = True
+                
+                if self.dist < self.attack_dist:
+                    self.animate(self.attack_images)
+                    self.attack()
+                else:
+                    self.animate(self.walk_images)
+                    self.movement()
+            elif self.player_search_trigger:
+                self.animate(self.walk_images)
+                self.movement()
+            
+    @property
+    def map_pos(self):
+        return int(self.x), int(self.y)
+    
+    def ray_cast_player_npc(self):
+        if self.game.player.map_pos == self.map_pos:
+            return True
+        
+        wall_dist_v, wall_dist_h = 0, 0
+        player_dist_v, player_dist_h = 0, 0
+        
+        ox, oy = self.game.player.pos
+        x_map, y_map = self.game.player.map_pos
+        
+        ray_angle = self.theta
+        sin_a = math.sin(ray_angle)
+        cos_a = math.cos(ray_angle)
+        
+        # horizontal
+        y_horz, dy = (y_map + 1, 1) if sin_a > 0 else (y_map - 1e-6, -1)
+        
+        depth_horz = (y_horz - oy) / sin_a
+        x_horz = ox + depth_horz * cos_a
+        
+        delta_depth = dy / sin_a
+        dx = delta_depth * cos_a
+        
+        for i in range(MAX_DEPTH):
+            tile_horz = int(x_horz), int(y_horz)
+            if tile_horz == self.map_pos:
+                player_dist_h = depth_horz
+                break
+            if tile_horz in self.game.map.world_map:
+                wall_dist_h = depth_horz
+                break
+            x_horz += dx
+            y_horz += dy
+            depth_horz += delta_depth
+        
+        # verticals
+        x_vert, dx = (x_map + 1, 1) if cos_a > 0 else (x_map - 1e-6, -1)
+        
+        depth_vert = (x_vert - ox) / cos_a
+        y_vert = oy + depth_vert * sin_a
+        
+        delta_depth = dx / cos_a
+        dy = delta_depth * sin_a
+        
+        for i in range(MAX_DEPTH):
+            tile_vert = int(x_vert), int(y_vert)
+            if tile_vert == self.map_pos:
+                player_dist_v = depth_vert
+                break
+            if tile_vert in self.game.map.world_map:
+                wall_dist_v = depth_vert
+                break
+            x_vert += dx
+            y_vert += dy
+            depth_vert += delta_depth
+            
+        player_dist = max(player_dist_v, player_dist_h)
+        wall_dist = max(wall_dist_v, wall_dist_h)
+        
+        if 0 < player_dist < wall_dist or not wall_dist:
+            return True
+        return False
+    
+    def draw_ray_cast(self):
+        pg.draw.circle(self.game.screen, 'red', (100 * self.x, 100 * self.y), 15)
+        if self.ray_cast_player_npc():
+            pg.draw.line(self.game.screen, 'orange', (100 * self.game.player.x, 100 * self.game.player.y),
+                        (100 * self.x, 100 * self.y), 2)