From 54b10f000bb4e7dc02338203cdf6028dbcdaea35 Mon Sep 17 00:00:00 2001
From: codegirl-007 <s.raide@gmail.com>
Date: Thu, 18 Jun 2026 01:31:06 -0700
Subject: [PATCH] add a start wave button

---
 game/commands.odin  |  3 +++
 game/constants.odin |  3 +++
 game/hud.odin       |  1 -
 game/overlay.odin   | 26 ++++++++++++++++++++++++++
 4 files changed, 32 insertions(+), 1 deletion(-)

diff --git a/game/commands.odin b/game/commands.odin
index 9869ce3..fb021e2 100644
--- a/game/commands.odin
+++ b/game/commands.odin
@@ -15,6 +15,9 @@ Command :: struct {
 }
 
 gather_commands :: proc(world: ^World) -> Command {
+	ui_cmd := overlay_ui_command(world)
+	if ui_cmd.kind != .None do return ui_cmd
+
 	if world.phase == .Build && rl.IsKeyPressed(.N) {
 		return Command{kind = .Start_Wave}
 	}
diff --git a/game/constants.odin b/game/constants.odin
index 74c7294..a433b69 100644
--- a/game/constants.odin
+++ b/game/constants.odin
@@ -26,3 +26,6 @@ OVERLAY_BAR_COLOR :: rl.Color{20, 24, 20, 200}
 OVERLAY_GOLD_COLOR :: rl.Color{255, 215, 80, 255}
 OVERLAY_TEXT_COLOR :: rl.Color{240, 240, 230, 255}
 
+OVERLAY_BUTTON_COLOR :: rl.Color{60, 120, 60, 255}
+OVERLAY_BUTTON_HOVER :: rl.Color{80, 150, 80, 255}
+
diff --git a/game/hud.odin b/game/hud.odin
index 7476307..523d04b 100644
--- a/game/hud.odin
+++ b/game/hud.odin
@@ -9,7 +9,6 @@ render_hud :: proc(world: ^World) {
 
 	switch world.phase {
 	case .Build:
-		rl.DrawText("Build - click towers, N = start wave", 10, 98, 22, rl.BLACK)
 	case .Combat:
 		rl.DrawText("Combat!", 10, 98, 22, rl.MAROON)
 	case .Game_Over:
diff --git a/game/overlay.odin b/game/overlay.odin
index 20cc9a9..dcce60f 100644
--- a/game/overlay.odin
+++ b/game/overlay.odin
@@ -18,5 +18,31 @@ render_overlay :: proc(world: ^World) {
 
 	hp := fmt.ctprintf("Health: %d", world.base_health)
 	rl.DrawText(hp, x, y, font_size, OVERLAY_TEXT_COLOR)
+
+	if world.phase == .Build {
+		btn := start_wave_button_rect()
+		mouse := rl.GetMousePosition()
+		hovered := rl.CheckCollisionPointRec(mouse, btn)
+		bg := hovered ? OVERLAY_BUTTON_HOVER : OVERLAY_BUTTON_COLOR
+		rl.DrawRectangleRec(btn, bg)
+		rl.DrawText("Start Wave", i32(btn.x) + 8, i32(btn.y) + 3, 16, OVERLAY_TEXT_COLOR)
+	}
+}
+
+start_wave_button_rect :: proc() -> rl.Rectangle {
+	return {x = f32(SCREEN_W - 120), y = 3, width = 110, height = 22}
+}
+
+overlay_ui_command :: proc(world: ^World) -> Command {
+	if world.phase != .Build do return Command{kind = .None}
+
+	mouse := rl.GetMousePosition()
+	btn := start_wave_button_rect()
+
+	if rl.CheckCollisionPointRec(mouse, btn) && rl.IsMouseButtonPressed(.LEFT) {
+		return Command{kind = .Start_Wave}
+	}
+
+	return Command{kind = .None}
 }