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- use ggez;
- use ggez::event;
- use ggez::graphics;
- use ggez::nalgebra as na;
- use ggez::timer::check_update_time;
- use ggez::{Context, GameResult};
- use std::env;
- use std::path;
-
- const TARGET_ANIMATION_FPS: u32 = 10;
-
- struct SpriteInfo {
- relative_start_y: f32,
- relative_tile_width: f32,
- relative_tile_height: f32,
- tile_count: u16,
- current_frame: u16,
- }
-
- impl SpriteInfo {
- pub fn new(
- relative_start_y: f32,
- relative_tile_width: f32,
- relative_tile_height: f32,
- tile_count: u16,
- ) -> Self {
- Self {
- relative_start_y,
- relative_tile_width,
- relative_tile_height,
- tile_count,
- current_frame: 0,
- }
- }
-
- pub fn from_type(
- type_: &SpriteType,
- sprite_sheet_width: f32,
- sprite_sheet_height: f32,
- ) -> Self {
- let (start_y, tile_width, tile_height, tile_count) = match type_ {
- SpriteType::WalkingSoldier => (0.0, 24.0, 24.0, 7),
- SpriteType::JumpingSoldier => (24.0, 24.0, 24.0, 2),
- };
-
- Self {
- relative_start_y: start_y / sprite_sheet_height,
- relative_tile_width: tile_width / sprite_sheet_width,
- relative_tile_height: tile_height / sprite_sheet_height,
- tile_count,
- current_frame: 0,
- }
- }
- }
-
- enum SpriteType {
- WalkingSoldier,
- JumpingSoldier,
- }
-
- fn sprite_batch_part_from_sprite_info(sprite_info: &SpriteInfo) -> graphics::DrawParam {
- let src = graphics::Rect::new(
- sprite_info.current_frame as f32 * sprite_info.relative_tile_width,
- sprite_info.relative_start_y,
- sprite_info.relative_tile_width,
- sprite_info.relative_tile_height,
- );
- graphics::DrawParam::new().src(src)
- }
-
- struct SceneItem {
- sprite_info: SpriteInfo,
- position: na::Point2<f32>,
- }
-
- impl SceneItem {
- pub fn new(
- sprite_type: SpriteType,
- position: na::Point2<f32>,
- sprite_sheet_width: f32,
- sprite_sheet_height: f32,
- ) -> Self {
- Self {
- sprite_info: SpriteInfo::from_type(
- &sprite_type,
- sprite_sheet_width,
- sprite_sheet_height,
- ),
- position,
- }
- }
-
- pub fn tick_frame(&mut self) {
- self.sprite_info.current_frame += 1;
- if self.sprite_info.current_frame >= self.sprite_info.tile_count {
- self.sprite_info.current_frame = 0;
- }
- }
- }
-
- enum Message {}
-
- struct MainState {
- scene_items_sprite_batch: graphics::spritebatch::SpriteBatch,
- scene_items: Vec<SceneItem>,
- }
-
- impl MainState {
- fn new(ctx: &mut Context) -> GameResult<MainState> {
- let image = graphics::Image::new(ctx, "/test.png").unwrap();
- let batch = graphics::spritebatch::SpriteBatch::new(image);
-
- let mut scene_items = vec![];
- for x in 0..1 {
- for y in 0..4 {
- let sprite_type = if y % 2 == 0 {
- SpriteType::WalkingSoldier
- } else {
- SpriteType::JumpingSoldier
- };
-
- scene_items.push(SceneItem::new(
- sprite_type,
- na::Point2::new(x as f32 * 24.0, y as f32 * 24.0),
- 168.0,
- 48.0,
- ));
- }
- }
-
- let s = MainState {
- scene_items_sprite_batch: batch,
- scene_items,
- };
- Ok(s)
- }
- }
-
- impl event::EventHandler for MainState {
- fn update(&mut self, ctx: &mut Context) -> GameResult {
- while check_update_time(ctx, TARGET_ANIMATION_FPS) {
- for scene_item in self.scene_items.iter_mut() {
- scene_item.tick_frame();
- }
- }
-
- Ok(())
- }
-
- fn draw(&mut self, ctx: &mut Context) -> GameResult {
- graphics::clear(ctx, graphics::BLACK);
-
- for scene_item in self.scene_items.iter() {
- let sprite_batch_part = sprite_batch_part_from_sprite_info(&scene_item.sprite_info)
- .dest(scene_item.position.clone());
- self.scene_items_sprite_batch.add(sprite_batch_part);
- }
- graphics::draw(
- ctx,
- &self.scene_items_sprite_batch,
- graphics::DrawParam::new().dest(na::Point2::new(0.0, 0.0)),
- )?;
-
- self.scene_items_sprite_batch.clear();
- graphics::present(ctx)?;
-
- println!("FPS: {}", ggez::timer::fps(ctx));
- Ok(())
- }
- }
- // TODO: spite i par objet, fabrication des sprite_info qu'une fois; channel pour modifs des objets ds update
- pub fn main() -> GameResult {
- let resource_dir = if let Ok(manifest_dir) = env::var("CARGO_MANIFEST_DIR") {
- let mut path = path::PathBuf::from(manifest_dir);
- path.push("resources");
- path
- } else {
- path::PathBuf::from("./resources")
- };
-
- let cb = ggez::ContextBuilder::new("oc", "bux")
- .add_resource_path(resource_dir)
- .window_mode(ggez::conf::WindowMode::default().dimensions(800.0, 600.0));
- let (ctx, event_loop) = &mut cb.build()?;
-
- let state = &mut MainState::new(ctx)?;
- event::run(ctx, event_loop, state)
- }
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