delta time!

main.odin

@@ -11,6 +11,8 @@ Game :: struct {
 	render:      ^sdl3.Renderer,
 	units:       [dynamic]Unit,
 	player:      Unit,
+	time:        u64,
+	delta:       f32,
 	input_state: map[sdl3.Scancode]bool,
 }
 
@@ -30,10 +32,16 @@ main :: proc() {
 	append(&units, Unit{faction = Faction.Allied, position = Position{x = 500, y = 500}, hp = 100})
 	append(&units, Unit{faction = Faction.Enemy, position = Position{x = 700, y = 700}, hp = 100})
 	input_state := make(map[sdl3.Scancode]bool)
+
+	time := sdl3.GetTicksNS()
+
+
 	game := Game {
 		render = render,
 		units = units,
 		player = Unit{faction = Faction.Player, position = Position{x = 255, y = 255}, hp = 100},
+		time = time,
+		delta = 0.0,
 		input_state = input_state,
 	}
 
@@ -65,4 +73,9 @@ RenderGame :: proc(game: ^Game) {
 	RenderUnit(game.player, game)
 
 	sdl3.RenderPresent(game.render)
+
+	new_time := sdl3.GetTicksNS()
+	delta_ns := new_time - game.time
+	game.time = new_time
+	game.delta = f32(delta_ns) / f32(sdl3.NS_PER_SECOND)
 }