freenukum 0.3.5

A clone of the 1991 DOS game Duke Nukem 1
Documentation 
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use crate::{
    actor::{
        ActParameters, ActorCreateInterface, ActorData, ActorInterface,
        ActorType, RenderParameters,
    },
    level::{solids::LevelSolids, tiles::LevelTiles},
    Result, NUMBER_100, NUMBER_1000, NUMBER_10000, NUMBER_200,
    NUMBER_2000, NUMBER_500, NUMBER_5000, NUMBER_BONUS_1_LEFT,
    NUMBER_BONUS_1_RIGHT, NUMBER_BONUS_2_LEFT, NUMBER_BONUS_2_RIGHT,
    NUMBER_BONUS_3_LEFT, NUMBER_BONUS_3_RIGHT, NUMBER_BONUS_4_LEFT,
    NUMBER_BONUS_4_RIGHT, NUMBER_BONUS_5_LEFT, NUMBER_BONUS_5_RIGHT,
    NUMBER_BONUS_6_LEFT, NUMBER_BONUS_6_RIGHT, NUMBER_BONUS_7_LEFT,
    NUMBER_BONUS_7_RIGHT, TILE_HEIGHT, TILE_WIDTH,
};

#[derive(Debug)]
pub(crate) struct Specific {
    tile: usize,
    countdown: usize,
}

impl ActorCreateInterface for Specific {
    fn create(
        general: &mut ActorData,
        _solids: &mut LevelSolids,
        _tiles: &mut LevelTiles,
    ) -> Specific {
        general.is_in_foreground = true;
        general.position.resize(TILE_WIDTH, TILE_HEIGHT);
        general.acts_while_invisible = true;

        let tile = match general.actor_type {
            ActorType::Score100 => NUMBER_100,
            ActorType::Score200 => NUMBER_200,
            ActorType::Score500 => NUMBER_500,
            ActorType::Score1000 => NUMBER_1000,
            ActorType::Score2000 => NUMBER_2000,
            ActorType::Score5000 => NUMBER_5000,
            ActorType::Score10000 => NUMBER_10000,
            ActorType::ScoreBonus1Left => NUMBER_BONUS_1_LEFT,
            ActorType::ScoreBonus1Right => NUMBER_BONUS_1_RIGHT,
            ActorType::ScoreBonus2Left => NUMBER_BONUS_2_LEFT,
            ActorType::ScoreBonus2Right => NUMBER_BONUS_2_RIGHT,
            ActorType::ScoreBonus3Left => NUMBER_BONUS_3_LEFT,
            ActorType::ScoreBonus3Right => NUMBER_BONUS_3_RIGHT,
            ActorType::ScoreBonus4Left => NUMBER_BONUS_4_LEFT,
            ActorType::ScoreBonus4Right => NUMBER_BONUS_4_RIGHT,
            ActorType::ScoreBonus5Left => NUMBER_BONUS_5_LEFT,
            ActorType::ScoreBonus5Right => NUMBER_BONUS_5_RIGHT,
            ActorType::ScoreBonus6Left => NUMBER_BONUS_6_LEFT,
            ActorType::ScoreBonus6Right => NUMBER_BONUS_6_RIGHT,
            ActorType::ScoreBonus7Left => NUMBER_BONUS_7_LEFT,
            ActorType::ScoreBonus7Right => NUMBER_BONUS_7_RIGHT,
            _ => {
                unreachable!(
                    "Actor type {:?} added as an score \
                    which is not a score id",
                    general.actor_type
                );
            }
        };

        Specific {
            tile,
            countdown: 40,
        }
    }
}

impl ActorInterface for Specific {
    fn act(&mut self, p: ActParameters) {
        self.countdown -= 1;
        p.general.position.y -= 1;
        if self.countdown == 0
            || p.general.position.y() == -(TILE_HEIGHT as i32)
        {
            p.general.is_alive = false;
        }
    }

    fn render(&mut self, p: RenderParameters) -> Result<()> {
        p.renderer
            .place_tile(self.tile, p.general.position.top_left())?;
        Ok(())
    }
}