generated from tipragot/rust
Add a renderer system with temp assets #60
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//! All functions related to the rendering of the map.
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use bevy::prelude::*;
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use super::Tile;
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use crate::map::TilePosition;
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/// A plugin to render the map.
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pub struct RendererPlugin;
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impl Plugin for RendererPlugin {
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fn build(&self, app: &mut App) {
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app.add_systems(Startup, setup_camera).add_systems(
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Update,
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render_map.run_if(in_state(crate::CurrentScene::Game)),
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);
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}
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}
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/// Sets up the camera.
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fn setup_camera(mut commands: Commands) {
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commands.spawn(Camera2dBundle::default());
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}
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impl Tile {
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/// Returns the texture handle of the tile.
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pub fn get_texture(&self, asset_server: &AssetServer) -> Handle<Image> {
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match self {
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Tile::Grass => asset_server.load("tiles/grass.png"),
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Tile::Forest => asset_server.load("tiles/forest.png"),
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Tile::Hill => asset_server.load("tiles/hill.png"),
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}
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}
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}
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/// Renders the map.
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fn render_map(
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query: Query<(Entity, &TilePosition, &Tile), Changed<Tile>>,
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mut commands: Commands,
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asset_server: Res<AssetServer>,
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) {
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for (entity, position, tile) in query.iter() {
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let pixel_position_ratio = position.to_pixel_coordinates();
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let pixel_position = (50. * pixel_position_ratio.x, pixel_position_ratio.y * 30.);
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commands.entity(entity).insert(SpriteBundle {
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transform: Transform::from_translation(Vec3 {
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x: pixel_position.0,
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y: pixel_position.1,
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z: 0.,
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}),
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texture: tile.get_texture(&*asset_server),
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..default()
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});
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}
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}
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