initial commit

general/components.odin

@@ -0,0 +1,7 @@
+package main
+
+import rl "vendor:raylib"
+
+Transform :: struct {
+	position: rl.Vector2,
+}

general/ecs/ecs.odin

@@ -0,0 +1,35 @@
+package ecs
+
+import "core:fmt"
+
+startup_systems: [dynamic]proc()
+update_systems: [dynamic]proc()
+fixed_update_systems: [dynamic]proc()
+
+
+App :: struct {}
+
+Component :: union {
+	Transform,
+}
+
+Transform :: struct {}
+
+STARTUP :: 0
+UPDATE :: 1
+FIXED_UPDATE :: 2
+
+add_system :: proc(schedule: int, system: proc()) {
+	switch schedule {
+	case 0:
+		append(&startup_systems, system)
+	case 1:
+		append(&update_systems, system)
+	case 2:
+		append(&fixed_update_systems, system)
+	}
+}
+
+ping :: proc() {
+
+}

general/entities.odin

@@ -0,0 +1,19 @@
+package main
+
+import rl "vendor:raylib"
+
+Entity :: union {
+	Player,
+	Enemy,
+}
+
+Player :: struct {
+	transform: Transform,
+	sprite:    rl.Texture2D,
+	camera:    rl.Camera2D,
+}
+
+Enemy :: struct {
+	transform: Transform,
+	sprite:    rl.Texture2D,
+}

general/main.odin

@@ -0,0 +1,100 @@
+package main
+
+import "core:fmt"
+import "ecs"
+import rl "vendor:raylib"
+
+World :: struct {
+	entities: map[rl.Vector2]Entity,
+}
+
+world: World
+player: Player
+enemy: Enemy
+camera: rl.Camera2D
+CELL_SIZE :: 20
+
+main :: proc() {
+	ecs.ping()
+	fmt.println("hello world")
+	rl.InitWindow(800, 600, "grimm gameplay prototype")
+	defer rl.CloseWindow()
+
+	player = Player {
+		transform = Transform{position = {4, 8}},
+		camera = rl.Camera2D{target = {0, 0}, zoom = 1.5},
+	}
+	world.entities[player.transform.position] = player
+	enemy = Enemy {
+		transform = Transform{position = {8, 8}},
+	}
+	world.entities[enemy.transform.position] = enemy
+
+	for !rl.WindowShouldClose() {
+		update()
+		rl.BeginDrawing()
+		rl.ClearBackground(rl.PURPLE)
+		rl.BeginMode2D(player.camera)
+		draw()
+		rl.EndMode2D()
+		rl.EndDrawing()
+	}
+}
+
+update :: proc() {
+	if rl.IsKeyPressed(rl.KeyboardKey.W) {
+		move(&player.transform, 0, -1)
+	}
+	if rl.IsKeyPressed(rl.KeyboardKey.A) {
+		move(&player.transform, -1, 0)
+	}
+	if rl.IsKeyPressed(rl.KeyboardKey.S) {
+		move(&player.transform, 0, 1)
+	}
+	if rl.IsKeyPressed(rl.KeyboardKey.D) {
+		move(&player.transform, 1, 0)
+	}
+
+	if rl.IsKeyPressed(rl.KeyboardKey.SPACE) {
+		move(&enemy.transform, 1, 0)
+	}
+
+}
+
+draw :: proc() {
+	rl.DrawRectangle(
+		i32(player.transform.position.x * CELL_SIZE),
+		i32(player.transform.position.y * CELL_SIZE),
+		CELL_SIZE,
+		CELL_SIZE,
+		rl.WHITE,
+	)
+	rl.DrawRectangle(
+		i32(enemy.transform.position.x * CELL_SIZE),
+		i32(enemy.transform.position.y * CELL_SIZE),
+		CELL_SIZE,
+		CELL_SIZE,
+		rl.BLUE,
+	)
+
+
+	for x in 0 ..< 26 {
+		for y in 0 ..< 26 {
+			rl.DrawRectangleLines(
+				i32(x) * CELL_SIZE,
+				i32(y) * CELL_SIZE,
+				CELL_SIZE,
+				CELL_SIZE,
+				rl.BLANK,
+			)
+		}
+	}
+
+	if rl.IsMouseButtonDown(rl.MouseButton.LEFT) {
+		pos := rl.GetScreenToWorld2D(rl.GetMousePosition(), player.camera)
+		pos_x := int(pos.x / CELL_SIZE) * CELL_SIZE
+		pos_y := int(pos.y / CELL_SIZE) * CELL_SIZE
+		shoot({f32(pos_x), f32(pos_y)}, player.transform)
+	}
+
+}

general/systems.odin

@@ -0,0 +1,33 @@
+package main
+
+import rl "vendor:raylib"
+
+move :: proc(t: ^Transform, x, y: f32) {
+	next_position := Transform {
+		position = {t.position.x + x, t.position.y + y},
+	}
+	if e, occupied := world.entities[next_position.position]; !occupied {
+		delete_key(&world.entities, t.position)
+		defer world.entities[t.position] = e
+		t.position = next_position.position
+	}
+}
+
+shoot :: proc(pos: rl.Vector2, t: Transform) {
+	pos_centered := center_to_grid(pos)
+	t_centered := center_to_grid(t.position)
+	rl.DrawLine(
+		i32(t.position.x) * CELL_SIZE + (CELL_SIZE / 2),
+		i32(t.position.y) * CELL_SIZE + (CELL_SIZE / 2),
+		i32(pos_centered.x),
+		i32(pos_centered.y),
+		rl.WHITE,
+	)
+}
+
+center_to_grid :: proc(pos: rl.Vector2) -> rl.Vector2 {
+	pos_x, pos_y: f32
+	pos_x = pos.x + CELL_SIZE / 2
+	pos_y = pos.y + CELL_SIZE / 2
+	return rl.Vector2{pos_x, pos_y}
+}