From 0750aef98086f85591afbcdc68eaabb60ea4dbd3 Mon Sep 17 00:00:00 2001
From: Trevor Boddy <bboddyy@gmail.com>
Date: Fri, 23 Sep 2022 10:49:04 -0400
Subject: [PATCH] boss movement

---
 src/stage.h | 49 ++++++++++++++++++++++++++++++++++++++-----------
 1 file changed, 38 insertions(+), 11 deletions(-)

diff --git a/src/stage.h b/src/stage.h
index 7b59aca..badc131 100644
--- a/src/stage.h
+++ b/src/stage.h
@@ -229,6 +229,40 @@ static void waveBig4(bool right, bool second){
 
 // bosses
 
+#define BOSS_MOD_Y FIX16(16)
+#define BOSS_MOD_X FIX16(64)
+fix16 bossLimitY, bossLimitH, bossLimitX, bossLimitW;
+
+static void bossIntro(s16 i){
+	if(enemies[i].clock > 0 && enemies[i].clock % 30 == 0){
+		enemies[i].speed = fix16Sub(enemies[i].speed, FIX16(0.25));
+		if(enemies[i].speed <= 0){
+			bossLimitY = fix16Sub(enemies[i].pos.y, BOSS_MOD_Y);
+			bossLimitH = fix16Add(enemies[i].pos.y, BOSS_MOD_Y);
+			bossLimitX = fix16Sub(enemies[i].pos.x, BOSS_MOD_X);
+			bossLimitW = fix16Add(enemies[i].pos.x, BOSS_MOD_X);
+			enemies[i].speed = FIX16(0.4);
+			enemies[i].angle = 32;
+			enemies[i].bools[0] = TRUE;
+			enemies[i].clock = -1;
+		}
+		updateEnemyVel(i);
+	}
+}
+
+static void bossMove(s16 i){
+	if(enemies[i].pos.x > bossLimitW || enemies[i].pos.x < bossLimitX){
+		enemies[i].pos.x = enemies[i].pos.x > bossLimitW ? bossLimitW : bossLimitX;
+		enemies[i].angle = 512 - enemies[i].angle;
+		updateEnemyVel(i);
+	}
+	if(enemies[i].pos.y > bossLimitH || enemies[i].pos.y < bossLimitY){
+		enemies[i].pos.y = enemies[i].pos.y > bossLimitH ? bossLimitH : bossLimitY;
+		enemies[i].angle = 1024 - enemies[i].angle;
+		updateEnemyVel(i);
+	}
+}
+
 static void waveMidboss1(){
 	struct enemySpawner spawner = {
 		.angle = 256,
@@ -242,6 +276,8 @@ static void waveMidboss1(){
 	void updater(s16 i){
 		if(enemies[i].bools[0]){
 
+			bossMove(i);
+
 			// ring
 			if(enemies[i].clock % 90 == 0){
 				struct bulletSpawner spawner = {
@@ -249,7 +285,7 @@ static void waveMidboss1(){
 					.y = enemies[i].pos.y,
 					.image = &bigBullet,
 					.big = TRUE,
-					.speed = FIX16(1),
+					.speed = FIX16(1.25),
 					.angle = 80 + random() % 32,
 					.light = TRUE
 				};
@@ -274,16 +310,7 @@ static void waveMidboss1(){
 				spawnBullet(spawner, EMPTY);
 			}
 
-
-		} else if(!enemies[i].bools[0] && enemies[i].clock > 0 && enemies[i].clock % 30 == 0) {
-			enemies[i].speed = fix16Sub(enemies[i].speed, FIX16(0.25));
-			if(enemies[i].speed <= 0){
-				enemies[i].speed = 0;
-				enemies[i].bools[0] = TRUE;
-				enemies[i].clock = -1;
-			}
-			updateEnemyVel(i);
-		}
+		} else bossIntro(i);
 	}
 	spawnEnemy(spawner, updater, EMPTY);
 }