Initial commit

.gitignore

@@ -0,0 +1,2 @@
+/target
+**/*.rs.bk

Cargo.toml

@@ -0,0 +1,13 @@
+[package]
+name = "hellorust"
+version = "0.1.0"
+authors = ["Tyrel Souza <923113+tyrelsouza@users.noreply.github.com>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+rltk = { git = "https://github.com/thebracket/rltk_rs" }
+specs = "0.15.0"
+specs-derive = "0.4.0"
+

resources/backing.fs

@@ -0,0 +1,12 @@
+#version 330 core
+out vec4 FragColor;
+
+in vec2 TexCoords;
+
+uniform sampler2D screenTexture;
+
+void main()
+{
+    vec3 col = texture(screenTexture, TexCoords).rgb;
+    FragColor = vec4(col, 1.0);
+}

resources/backing.vs

@@ -0,0 +1,11 @@
+#version 330 core
+layout (location = 0) in vec2 aPos;
+layout (location = 1) in vec2 aTexCoords;
+
+out vec2 TexCoords;
+
+void main()
+{
+    TexCoords = aTexCoords;
+    gl_Position = vec4(aPos.x, aPos.y, 0.0, 1.0);
+}

resources/console_no_bg.fs

@@ -0,0 +1,17 @@
+#version 330 core
+out vec4 FragColor;
+
+in vec3 ourColor;
+in vec2 TexCoord;
+in vec3 ourBackground;
+
+// texture sampler
+uniform sampler2D texture1;
+
+void main()
+{
+    vec4 original = texture(texture1, TexCoord);
+    if (original.r < 0.1f || original.g < 0.1f || original.b < 0.1f) discard;
+    vec4 fg = original * vec4(ourColor, 1.f);
+	FragColor = fg;
+}

resources/console_no_bg.vs

@@ -0,0 +1,17 @@
+#version 330 core
+layout (location = 0) in vec3 aPos;
+layout (location = 1) in vec3 aColor;
+layout (location = 2) in vec3 bColor;
+layout (location = 3) in vec2 aTexCoord;
+
+out vec3 ourColor;
+out vec3 ourBackground;
+out vec2 TexCoord;
+
+void main()
+{
+	gl_Position = vec4(aPos, 1.0);
+	ourColor = aColor;
+	ourBackground = bColor;
+	TexCoord = vec2(aTexCoord.x, aTexCoord.y);
+}

resources/console_with_bg.fs

@@ -0,0 +1,16 @@
+#version 330 core
+out vec4 FragColor;
+
+in vec3 ourColor;
+in vec2 TexCoord;
+in vec3 ourBackground;
+
+// texture sampler
+uniform sampler2D texture1;
+
+void main()
+{
+    vec4 original = texture(texture1, TexCoord);
+    vec4 fg = original.r > 0.1f || original.g > 0.1f || original.b > 0.1f ? original * vec4(ourColor, 1.f) : vec4(ourBackground, 1.f);
+	FragColor = fg;
+}

resources/console_with_bg.vs

@@ -0,0 +1,17 @@
+#version 330 core
+layout (location = 0) in vec3 aPos;
+layout (location = 1) in vec3 aColor;
+layout (location = 2) in vec3 bColor;
+layout (location = 3) in vec2 aTexCoord;
+
+out vec3 ourColor;
+out vec3 ourBackground;
+out vec2 TexCoord;
+
+void main()
+{
+	gl_Position = vec4(aPos, 1.0);
+	ourColor = aColor;
+	ourBackground = bColor;
+	TexCoord = vec2(aTexCoord.x, aTexCoord.y);
+}

resources/scanlines.fs

@@ -0,0 +1,26 @@
+#version 330 core
+out vec4 FragColor;
+
+in vec2 TexCoords;
+
+uniform sampler2D screenTexture;
+uniform vec3 screenSize;
+uniform bool screenBurn;
+
+void main()
+{
+    vec3 col = texture(screenTexture, TexCoords).rgb;
+    float scanLine = mod(gl_FragCoord.y, 2.0) * 0.25;
+    vec3 scanColor = col.rgb - scanLine;
+
+    if (col.r < 0.1f && col.g < 0.1f && col.b < 0.1f) {
+        if (screenBurn) {
+            float dist = (1.0 - distance(vec2(gl_FragCoord.x / screenSize.x, gl_FragCoord.y / screenSize.y), vec2(0.5,0.5))) * 0.2;
+            FragColor = vec4(0.0, dist, dist, 1.0);
+        } else {
+            FragColor = vec4(0.0, 0.0, 0.0, 1.0);
+        }
+    } else {
+        FragColor = vec4(scanColor, 1.0);
+    }
+}

resources/scanlines.vs

@@ -0,0 +1,11 @@
+#version 330 core
+layout (location = 0) in vec2 aPos;
+layout (location = 1) in vec2 aTexCoords;
+
+out vec2 TexCoords;
+
+void main()
+{
+    TexCoords = aTexCoords;
+    gl_Position = vec4(aPos.x, aPos.y, 0.0, 1.0);
+}

src/main.rs

@@ -0,0 +1,205 @@
+rltk::add_wasm_support!();
+use rltk::{Console, GameState, Rltk, Tile, VirtualKeyCode, RGB};
+use specs::prelude::*;
+use std::any::TypeId;
+use std::cmp::{max, min};
+
+#[macro_use]
+extern crate specs_derive;
+
+struct State {
+    ecs: World,
+}
+impl GameState for State {
+    fn tick(&mut self, ctx: &mut Rltk) {
+        ctx.cls();
+
+        player_input(self, ctx);
+        self.run_systems();
+
+        let map = self.ecs.fetch::<Vec<TileType>>();
+        draw_map(&map, ctx);
+
+        let positions = self.ecs.read_storage::<Position>();
+        let renderables = self.ecs.read_storage::<Renderable>();
+
+        for (pos, render) in (&positions, &renderables).join() {
+            ctx.set(pos.x, pos.y, render.fg, render.bg, render.glyph);
+        }
+    }
+}
+
+struct LeftWalker {}
+impl<'a> System<'a> for LeftWalker {
+    type SystemData = (ReadStorage<'a, LeftMover>, WriteStorage<'a, Position>);
+    fn run(&mut self, (lefty, mut pos): Self::SystemData) {
+        for (_lefty, mut pos) in (&lefty, &mut pos).join() {
+            pos.x -= 1;
+            if pos.x < 0 {
+                pos.x = 79;
+            }
+        }
+    }
+}
+#[derive(Component, Debug)]
+struct Player {}
+
+#[derive(Component)]
+struct LeftMover {}
+
+#[derive(Component)]
+struct Position {
+    x: i32,
+    y: i32,
+}
+
+#[derive(Component)]
+struct Renderable {
+    glyph: u8,
+    fg: RGB,
+    bg: RGB,
+}
+
+#[derive(PartialEq, Copy, Clone)]
+enum TileType {
+    Wall,
+    Floor,
+}
+
+impl State {
+    fn run_systems(&mut self) {
+        let mut lw = LeftWalker {};
+        lw.run_now(&self.ecs);
+        self.ecs.maintain();
+    }
+}
+
+fn try_move_player(delta_x: i32, delta_y: i32, ecs: &mut World) {
+    let mut positions = ecs.write_storage::<Position>();
+    let mut players = ecs.write_storage::<Player>();
+    let map = ecs.fetch::<Vec<TileType>>();
+
+    for (_player, mut pos) in (&mut players, &mut positions).join() {
+        let destination_idx = xy_idx(pos.x + delta_x, pos.y + delta_y);
+        if map[destination_idx] != TileType::Wall {
+            pos.x = min(79, max(0, pos.x + delta_x));
+            pos.y = min(49, max(0, pos.y + delta_y));
+        }
+    }
+}
+
+fn player_input(gs: &mut State, ctx: &mut Rltk) {
+    // Player movement
+    match ctx.key {
+        None => {} // nothing happened
+        Some(key) => match key {
+            VirtualKeyCode::Left => try_move_player(-1, 0, &mut gs.ecs),
+            VirtualKeyCode::Right => try_move_player(1, 0, &mut gs.ecs),
+            VirtualKeyCode::Up => try_move_player(0, -1, &mut gs.ecs),
+            VirtualKeyCode::Down => try_move_player(0, 1, &mut gs.ecs),
+            _ => {}
+        },
+    }
+}
+
+pub fn xy_idx(x: i32, y: i32) -> usize {
+    (y as usize * 80) + x as usize
+}
+
+fn new_map() -> Vec<TileType> {
+    let mut map = vec![TileType::Floor; 80 * 50];
+
+    // Make the boundary walls
+    for x in 0..80 {
+        map[xy_idx(x, 0)] = TileType::Wall;
+        map[xy_idx(x, 49)] = TileType::Wall;
+    }
+    for y in 0..50 {
+        map[xy_idx(0, y)] = TileType::Wall;
+        map[xy_idx(79, y)] = TileType::Wall;
+    }
+
+    // now, randomly splat bunch of walls
+    // Obtain thread local RNG:
+
+    let mut rng = rltk::RandomNumberGenerator::new();
+    for _i in 0..400 {
+        let x = rng.roll_dice(1, 79);
+        let y = rng.roll_dice(1, 49);
+        let idx = xy_idx(x, y);
+        if idx != xy_idx(40, 25) {
+            map[idx] = TileType::Wall;
+        }
+    }
+
+    map
+}
+
+fn draw_map(map: &[TileType], ctx: &mut Rltk) {
+    let mut y = 0;
+    let mut x = 0;
+    for tile in map.iter() {
+        match tile {
+            TileType::Floor => {
+                ctx.set(
+                    x,
+                    y,
+                    RGB::from_f32(0.5, 0.5, 0.5),
+                    RGB::from_f32(0., 0., 0.),
+                    rltk::to_cp437('.'),
+                );
+            }
+            TileType::Wall => {
+                ctx.set(
+                    x,
+                    y,
+                    RGB::from_f32(0.0, 1.0, 0.0),
+                    RGB::from_f32(0., 0., 0.),
+                    rltk::to_cp437('#'),
+                );
+            }
+        }
+        x += 1;
+        if (x > 79) {
+            x = 0;
+            y += 1;
+        }
+    }
+}
+
+fn main() {
+    let context = Rltk::init_simple8x8(80, 50, "Hello Rust World", "resources");
+    let mut gs = State { ecs: World::new() };
+    gs.ecs.register::<Position>();
+    gs.ecs.register::<Renderable>();
+    gs.ecs.register::<LeftMover>();
+    gs.ecs.register::<Player>();
+
+    gs.ecs
+        .create_entity()
+        .with(Position { x: 40, y: 25 })
+        .with(Renderable {
+            glyph: rltk::to_cp437('@'),
+            fg: RGB::named(rltk::YELLOW),
+            bg: RGB::named(rltk::BLACK),
+        })
+        .with(Player {})
+        .build();
+
+    for i in 0..10 {
+        gs.ecs
+            .create_entity()
+            .with(Position { x: i * 7, y: 20 })
+            .with(Renderable {
+                glyph: rltk::to_cp437('☺'),
+                fg: RGB::named(rltk::RED),
+                bg: RGB::named(rltk::BLACK),
+            })
+            .with(LeftMover {})
+            .build();
+    }
+
+    gs.ecs.insert(new_map());
+
+    rltk::main_loop(context, gs);
+}