doukutsu-rs/src/npc/santa.rs

use ggez::GameResult;

use crate::npc::NPC;
use crate::shared_game_state::SharedGameState;
use crate::player::Player;
use num_traits::abs;
use crate::common::Direction;

impl NPC {
    pub(crate) fn tick_n040_santa(&mut self, state: &mut SharedGameState, players: [&mut Player; 2]) -> GameResult {
        match self.action_num {
            0 | 1 =>{
                if self.action_num == 0 {
                    self.action_num = 1;
                    self.anim_num = 0;
                    self.anim_counter = 0;
                }

                if state.game_rng.range(0..120) == 0 {
                    self.action_num = 2;
                    self.action_counter = 0;
                    self.anim_num = 1;
                }

                let player = self.get_closest_player_mut(players);
                if abs(self.x - player.x) < 32 * 0x200
                    && self.y - 32 * 0x200 < player.y && self.y + 16 * 0x200 > player.y {
                    self.direction = if self.x > player.x {
                        Direction::Left
                    } else {
                        Direction::Right
                    };
                }
            }
            2 => {
                self.action_counter += 1;
                if self.action_counter > 8 {
                    self.action_num = 1;
                    self.anim_num = 0;
                }
            }
            3 | 4 => {
                if self.action_num == 3 {
                    self.action_num = 4;
                    self.anim_num =2;
                    self.anim_counter = 0;
                }

                self.anim_counter += 1;
                if self.anim_counter > 4 {
                    self.anim_counter = 0;
                    self.anim_num += 1;

                    if self.anim_num > 5 {
                        self.anim_num = 2;
                    }
                }

                self.x += self.direction.vector_x() * 0x200;
            }
            5 => {
                self.anim_num = 6;
            }
            _ => {}
        }

        let dir_offset = if self.direction == Direction::Left { 0 } else { 7 };

        self.anim_rect = state.constants.npc.n040_santa[self.anim_num as usize + dir_offset];

        Ok(())
    }
}