Merge pull request #22 from Ewpratten/levels

Add POC level system [wip]

game/assets/levels/level_0/colliders.json

@@ -0,0 +1,32 @@
+[
+    {
+        "x": 322,
+        "y": 926,
+        "width": 610,
+        "height": 73
+    },
+    {
+        "x": 852,
+        "y": 882,
+        "width": 81,
+        "height": 178
+    },
+    {
+        "x": 852,
+        "y": 882,
+        "width": 258,
+        "height": 33
+    },
+    {
+        "x": 1599,
+        "y": 699,
+        "width": 918,
+        "height": 63
+    },
+    {
+        "x": 2733,
+        "y": 789,
+        "width": 108,
+        "height": 211
+    }
+]

game/assets/levels/levels.json

@@ -0,0 +1,3 @@
+[
+    "level_0"
+]

game/src/character/collisions.rs

@@ -2,11 +2,17 @@ use std::ops::Mul;
 
 use raylib::math::{Rectangle, Vector2};
 
+use crate::scenes::ingame_scene::world::WORLD_LEVEL_X_OFFSET;
+
 use super::{CharacterState, MainCharacter};
 
 pub const GRAVITY_PPS: f32 = 2.0;
 
-pub fn modify_player_based_on_forces(player: &mut MainCharacter) -> Result<(), ()> {
+pub fn modify_player_based_on_forces(
+    player: &mut MainCharacter,
+    colliders: &Vec<Rectangle>,
+    level_height_offset: f32,
+) -> Result<(), ()> {
     // Modify the player's velocity by the forces
     player.movement_force += player.base_velocity;
     player.velocity = player.movement_force;
@@ -14,7 +20,7 @@ pub fn modify_player_based_on_forces(player: &mut MainCharacter) -> Result<(), (
     // Predict the player's position next frame
     let predicted_player_position = player.position + player.velocity;
 
-    // Calculate a bounding rect around the player
+    // Calculate a bounding rect around the player both now, and one frame in the future
     let player_rect = Rectangle::new(
         predicted_player_position.x - (player.size.x / 2.0),
         predicted_player_position.y - (player.size.x / 2.0),
@@ -25,10 +31,24 @@ pub fn modify_player_based_on_forces(player: &mut MainCharacter) -> Result<(), (
     // Calculate a generic "floor" to always collide with
     let floor_rect = Rectangle::new(f32::MIN, 0.0, f32::MAX, 1.0);
 
+    // Check collision conditions
+    let check_player_colliding_with_floor = || floor_rect.check_collision_recs(&player_rect);
+    let check_player_colliding_with_floor_next_frame =
+        || player_rect.y + player_rect.height > floor_rect.y;
+    let check_player_colliding_with_colliders = || {
+        colliders.iter().any(|rect| {
+            let mut translated_rect = rect.clone();
+            translated_rect.y += level_height_offset;
+            translated_rect.x += WORLD_LEVEL_X_OFFSET;
+            translated_rect.check_collision_recs(&player_rect)
+        })
+    };
+
     // If the player is colliding, only apply the x force
-    if (floor_rect.check_collision_recs(&player_rect)
+    if (check_player_colliding_with_floor()
-        || player_rect.y + player_rect.height > floor_rect.y)
+        || check_player_colliding_with_floor_next_frame()
-        && player.velocity.y > 0.0
+        || check_player_colliding_with_colliders())
+        && player.velocity.y != 0.0
     {
         player.velocity.y = 0.0;
 
@@ -36,11 +56,17 @@ pub fn modify_player_based_on_forces(player: &mut MainCharacter) -> Result<(), (
         if player.current_state == CharacterState::Jumping
             || player.current_state == CharacterState::Dashing
         {
-            player.update_player(Some(CharacterState::Running));
+            player.update_player(
+                Some(CharacterState::Running),
+                colliders,
+                level_height_offset,
+            );
             return Ok(());
         }
     }
 
+    // Check sideways collisions
+
     // Finally apply the velocity to the player
     player.position += player.velocity;
 

game/src/character/mod.rs

@@ -2,7 +2,10 @@ pub mod collisions;
 pub mod render;
 
 use chrono::{DateTime, Utc};
-use raylib::{math::Vector2, texture::Texture2D};
+use raylib::{
+    math::{Rectangle, Vector2},
+    texture::Texture2D,
+};
 
 use crate::utilities::anim_render::AnimatedSpriteSheet;
 
@@ -48,7 +51,12 @@ impl MainCharacter {
         }
     }
 
-    pub fn update_player(&mut self, state: Option<CharacterState>) {
+    pub fn update_player(
+        &mut self,
+        state: Option<CharacterState>,
+        colliders: &Vec<Rectangle>,
+        level_height_offset: f32,
+    ) {
         if let Some(state) = state {
             // Update the internal state
             if state != self.current_state {
@@ -65,6 +73,6 @@ impl MainCharacter {
         }
 
         // Update the player based on the new velocity
-        modify_player_based_on_forces(self).unwrap();
+        modify_player_based_on_forces(self, colliders, level_height_offset).unwrap();
     }
 }

game/src/scenes/ingame_scene/level/loader.rs

@@ -0,0 +1,53 @@
+use raylib::{RaylibHandle, RaylibThread};
+
+use crate::{
+    utilities::datastore::{load_texture_from_internal_data, ResourceLoadError},
+    StaticGameData,
+};
+
+use super::Level;
+
+pub fn load_all_levels(
+    raylib_handle: &mut RaylibHandle,
+    thread: &RaylibThread,
+) -> Result<Vec<Level>, ResourceLoadError> {
+    // Get a listing of all levels we have
+    let level_names: Vec<String> = serde_json::from_str(
+        &String::from_utf8(
+            StaticGameData::get("levels/levels.json")
+                .expect("Could not load levels.json")
+                .data
+                .into(),
+        )
+        .unwrap(),
+    )?;
+
+    // Build a level list
+    let mut levels = Vec::new();
+
+    for level_name in &level_names {
+        levels.push(Level {
+            name: level_name.to_string(),
+            background_tex: load_texture_from_internal_data(
+                raylib_handle,
+                thread,
+                &format!("levels/{}/background.png", level_name),
+            )?,
+            platform_tex: load_texture_from_internal_data(
+                raylib_handle,
+                thread,
+                &format!("levels/{}/platforms.png", level_name),
+            )?,
+            colliders: serde_json::from_str(
+                &String::from_utf8(
+                    StaticGameData::get(&format!("levels/{}/colliders.json", level_name))
+                        .unwrap()
+                        .data
+                        .into(),
+                )
+                .unwrap(),
+            )?,
+        });
+    }
+    Ok(levels)
+}

game/src/scenes/ingame_scene/level/mod.rs

@@ -0,0 +1,11 @@
+use raylib::{math::Rectangle, texture::Texture2D};
+
+pub mod loader;
+
+#[derive(Debug)]
+pub struct Level {
+    pub name: String,
+    pub background_tex: Texture2D,
+    pub platform_tex: Texture2D,
+    pub colliders: Vec<Rectangle>
+}

game/src/scenes/ingame_scene/mod.rs

@@ -1,25 +1,41 @@
 use dirty_fsm::{Action, ActionFlag};
 use raylib::prelude::*;
 
-use crate::{character::{CharacterState, MainCharacter}, context::GameContext, utilities::{render_layer::{FrameUpdate, ScreenSpaceRender, WorldSpaceRender}, world_paint_texture::WorldPaintTexture}};
+use crate::{
+    character::{CharacterState, MainCharacter},
+    context::GameContext,
+    utilities::{
+        render_layer::{FrameUpdate, ScreenSpaceRender, WorldSpaceRender},
+        world_paint_texture::WorldPaintTexture,
+    },
+};
+
+use self::level::Level;
 
 use super::{Scenes, ScreenError};
 use tracing::{debug, trace};
 
 mod hud;
+pub mod level;
 mod update;
-mod world;
+pub mod world;
 
 #[derive(Debug)]
 pub struct InGameScreen {
     camera: Camera2D,
     player: MainCharacter,
-    world_background: WorldPaintTexture
+    world_background: WorldPaintTexture,
+    levels: Vec<Level>,
+    current_level_idx: usize,
 }
 
 impl InGameScreen {
     /// Construct a new `InGameScreen`
-    pub fn new(player_sprite_sheet: Texture2D, background_texture: Texture2D) -> Self {
+    pub fn new(
+        player_sprite_sheet: Texture2D,
+        background_texture: Texture2D,
+        levels: Vec<Level>,
+    ) -> Self {
         Self {
             camera: Camera2D {
                 offset: Vector2::zero(),
@@ -27,8 +43,10 @@ impl InGameScreen {
                 rotation: 0.0,
                 zoom: 1.0,
             },
-            player: MainCharacter::new(Vector2::new(0.0, -80.0), player_sprite_sheet),
+            player: MainCharacter::new(Vector2::new(0.0, -85.0), player_sprite_sheet),
-            world_background: WorldPaintTexture::new(background_texture)
+            world_background: WorldPaintTexture::new(background_texture),
+            levels,
+            current_level_idx: 0,
         }
     }
 }
@@ -43,7 +61,12 @@ impl Action<Scenes, ScreenError, GameContext> for InGameScreen {
         debug!("Running InGameScreen for the first time");
 
         // Set the player to running
-        self.player.update_player(Some(CharacterState::Running));
+        let cur_level = self.levels.get(self.current_level_idx).unwrap();
+        self.player.update_player(
+            Some(CharacterState::Running),
+            &cur_level.colliders,
+            -cur_level.platform_tex.height as f32,
+        );
 
         Ok(())
     }

game/src/scenes/ingame_scene/update.rs

@@ -17,6 +17,11 @@ impl FrameUpdate for InGameScreen {
         config: &GameConfig,
     ) {
         puffin::profile_function!();
+
+        // Get the current level
+        let cur_level = self.levels.get(self.current_level_idx).unwrap();
+
+
         // Set the camera's offset based on screen size
         self.camera.offset = raylib.get_screen_size().div(Vector2::new(2.0, 1.05));
         self.camera.target = Vector2::new(self.player.position.x, self.camera.target.y);
@@ -28,16 +33,20 @@ impl FrameUpdate for InGameScreen {
             && !(self.player.current_state == CharacterState::Dashing);
 
         if is_jump {
-            self.player.update_player(Some(CharacterState::Jumping));
+            self.player.update_player(Some(CharacterState::Jumping), &cur_level.colliders,
+            -cur_level.platform_tex.height as f32,);
         } else if is_dash {
-            self.player.update_player(Some(CharacterState::Dashing));
+            self.player.update_player(Some(CharacterState::Dashing), &cur_level.colliders,
+            -cur_level.platform_tex.height as f32,);
         } else {
             if self.player.current_state != CharacterState::Jumping
                 && self.player.current_state != CharacterState::Dashing
             {
-                self.player.update_player(Some(CharacterState::Running));
+                self.player.update_player(Some(CharacterState::Running), &cur_level.colliders,
+                -cur_level.platform_tex.height as f32,);
             } else {
-                self.player.update_player(None);
+                self.player.update_player(None, &cur_level.colliders,
+                    -cur_level.platform_tex.height as f32,);
             }
         }
     }

game/src/scenes/ingame_scene/world.rs

@@ -8,6 +8,8 @@ use crate::{
 };
 use raylib::prelude::*;
 
+pub const WORLD_LEVEL_X_OFFSET: f32 = 200.0;
+
 impl WorldSpaceRender for InGameScreen {
     fn render_world_space(
         &self,
@@ -16,8 +18,14 @@ impl WorldSpaceRender for InGameScreen {
     ) {
         puffin::profile_function!();
 
+        // Get the current level
+        let cur_level = self.levels.get(self.current_level_idx).unwrap();
+
         // Render the world background
-        self.world_background.render(raylib, Vector2::new(0.0, -1080.0), &self.camera);
+        // self.world_background.render(raylib, Vector2::new(0.0, -1080.0), &self.camera);
+
+        // Render the platform layer
+        raylib.draw_texture_v(&cur_level.platform_tex, Vector2::new(WORLD_LEVEL_X_OFFSET, -cur_level.platform_tex.height as f32), Color::WHITE);
 
         // Render the floor as a line
         let screen_world_zero = raylib.get_screen_to_world2D(Vector2::zero(), self.camera);

game/src/scenes/mod.rs

@@ -1,5 +1,7 @@
 use self::{
-    fsm_error_screen::FsmErrorScreen, ingame_scene::InGameScreen, loading_screen::LoadingScreen,
+    fsm_error_screen::FsmErrorScreen,
+    ingame_scene::{level::loader::load_all_levels, InGameScreen},
+    loading_screen::LoadingScreen,
     main_menu_screen::MainMenuScreen,
 };
 use crate::{
@@ -48,6 +50,7 @@ pub fn build_screen_state_machine(
         load_texture_from_internal_data(raylib_handle, thread, "character/player_run.png").unwrap();
     let world_background =
         load_texture_from_internal_data(raylib_handle, thread, "default-texture.png").unwrap();
+    let levels = load_all_levels(raylib_handle, thread).unwrap();
 
     // Set up the state machine
     let mut machine = StateMachine::new();
@@ -57,6 +60,9 @@ pub fn build_screen_state_machine(
         LoadingScreen::new(raylib_handle, thread)?,
     )?;
     machine.add_action(Scenes::MainMenuScreen, MainMenuScreen::new())?;
-    machine.add_action(Scenes::InGameScene, InGameScreen::new(player_sprite_sheet, world_background))?;
+    machine.add_action(
+        Scenes::InGameScene,
+        InGameScreen::new(player_sprite_sheet, world_background, levels),
+    )?;
     Ok(machine)
 }

game/src/utilities/datastore.rs

@@ -14,6 +14,8 @@ pub struct StaticGameData;
 
 #[derive(Debug, Error)]
 pub enum ResourceLoadError {
+    #[error(transparent)]
+    JsonDeser(#[from] serde_json::Error),
     #[error(transparent)]
     Io(#[from] std::io::Error),
     #[error("Could not load embedded asset: {0}")]