spawn an entity, no movement yet

constants.odin

@@ -8,3 +8,6 @@ TILE_SIZE :: 32
 MAP_WIDTH :: 80
 MAP_HEIGHT :: 60
 
+MAX_ENTITIES :: 256
+INVALID_ENTITY :: Entity(0)
+

entity.odin

@@ -0,0 +1,54 @@
+package main
+
+import rl "vendor:raylib"
+
+Entity :: distinct u32
+
+Entity_World :: struct {
+	count:       int,
+	active:      [MAX_ENTITIES]bool,
+	position:    [MAX_ENTITIES]Tile_Coord,
+	color:       [MAX_ENTITIES]rl.Color,
+	is_colonist: [MAX_ENTITIES]bool,
+}
+
+entity_world_init :: proc() -> Entity_World {
+	return Entity_World{}
+}
+
+entity_spawn_colonist :: proc(ew: ^Entity_World, pos: Tile_Coord) -> Entity {
+	for i in 0 ..< MAX_ENTITIES {
+		if !ew.active[i] {
+			ew.active[i] = true
+			ew.position[i] = pos
+			ew.color[i] = {80, 140, 220, 225}
+			ew.is_colonist[i] = true
+			ew.count += 1
+			return Entity(u32(i + 1))
+		}
+	}
+
+	return INVALID_ENTITY
+}
+
+entity_index :: proc(e: Entity) -> int {
+	return int(u32(e) - 1)
+}
+
+entity_draw :: proc(ew: ^Entity_World, camera: ^Camera2D) {
+	for i in 0 ..< MAX_ENTITIES {
+		if !ew.active[i] || !ew.is_colonist[i] {
+			continue
+		}
+
+		pos := ew.position[i]
+		wx := f32(pos.x * TILE_SIZE) + f32(TILE_SIZE) * 0.5
+		wy := f32(pos.y * TILE_SIZE) + f32(TILE_SIZE) * 0.5
+		sx, sy := world_to_screen(camera, wx, wy)
+		radius := f32(TILE_SIZE) * 0.3 * camera.zoom
+
+		rl.DrawCircle(i32(sx), i32(sy), radius, ew.color[i])
+		rl.DrawCircleLines(i32(sx), i32(sy), radius, rl.WHITE)
+	}
+}
+

game.odin

@@ -9,6 +9,7 @@ Game :: struct {
 	tilemap:   Tilemap,
 	camera:    Camera2D,
 	selection: Selection,
+	world:     World,
 }
 
 Camera2D :: struct {
@@ -34,6 +35,9 @@ game_init :: proc() -> Game {
 	}
 	g.tilemap = tilemap_init()
 	g.camera = camera_init()
+	g.world = world_init()
+	center := Tile_Coord{MAP_WIDTH / 2, MAP_HEIGHT / 2}
+	entity_spawn_colonist(&g.world.entities, center)
 	return g
 }
 
@@ -116,6 +120,8 @@ game_draw :: proc(g: ^Game) {
 	tilemap_draw(&g.tilemap, &g.camera)
 	tilemap_draw_selection(&g.tilemap, &g.camera, &g.selection)
 
+	world_draw(&g.world, &g.camera)
+
 	if g.selection.active {
 		rl.DrawText(
 			rl.TextFormat("Selection: (%i,%i)", g.selection.tile.x, g.selection.tile.y),

world.odin

@@ -0,0 +1,16 @@
+package main
+
+World :: struct {
+	entities: Entity_World,
+}
+
+world_init :: proc() -> World {
+	w := World{}
+	w.entities = entity_world_init()
+	return w
+}
+
+world_draw :: proc(w: ^World, camera: ^Camera2D) {
+	entity_draw(&w.entities, camera)
+}
+