From b746738c5c97e692d5993f680c674b4f5a42ca1f Mon Sep 17 00:00:00 2001
From: Andrei Alexeyev <akari@taisei-project.org>
Date: Sat, 24 Sep 2022 02:22:40 +0200
Subject: [PATCH] common_tasks: add common_rotate_velocity

---
 src/common_tasks.c           | 11 +++++++++++
 src/common_tasks.h           | 10 ++++++++++
 src/stages/stage2/timeline.c | 13 +------------
 3 files changed, 22 insertions(+), 12 deletions(-)

diff --git a/src/common_tasks.c b/src/common_tasks.c
index ffcef5e5..896291d3 100644
--- a/src/common_tasks.c
+++ b/src/common_tasks.c
@@ -370,3 +370,14 @@ DEFINE_EXTERN_TASK(common_easing_animate_vec4) {
 		glm_vec4_add(from, d, *ARGS.value);
 	}
 }
+
+void common_rotate_velocity(MoveParams *move, real angle, int duration) {
+	cmplx r = cdir(angle / duration);
+	move->retention *= r;
+	WAIT(duration);
+	move->retention /= r;
+}
+
+DEFINE_EXTERN_TASK(common_rotate_velocity) {
+	common_rotate_velocity(ARGS.move, ARGS.angle, ARGS.duration);
+}
diff --git a/src/common_tasks.h b/src/common_tasks.h
index f613b5a5..808158c1 100644
--- a/src/common_tasks.h
+++ b/src/common_tasks.h
@@ -90,6 +90,7 @@ INLINE Rect viewport_bounds(double margin) {
 }
 
 cmplx common_wander(cmplx origin, double dist, Rect bounds);
+void common_rotate_velocity(MoveParams *move, real angle, int duration);
 
 DECLARE_EXTERN_TASK(
 	common_set_bitflags,
@@ -143,3 +144,12 @@ DECLARE_EXTERN_TASK(
 		glm_ease_t ease;
 	}
 );
+
+DECLARE_EXTERN_TASK(
+	common_rotate_velocity,
+	{
+		MoveParams *move;
+		real angle;
+		int duration;
+	}
+);
diff --git a/src/stages/stage2/timeline.c b/src/stages/stage2/timeline.c
index ee0a9e56..8aabc467 100644
--- a/src/stages/stage2/timeline.c
+++ b/src/stages/stage2/timeline.c
@@ -343,20 +343,9 @@ TASK(aimshot_fairy, { BoxedEnemy e; MoveParams move_enter; MoveParams move_exit;
 	e->move = ARGS.move_exit;
 }
 
-TASK(rotate_velocity, {
-	MoveParams *move;
-	real angle;
-	int duration;
-}) {
-	cmplx r = cdir(ARGS.angle / ARGS.duration);
-	ARGS.move->retention *= r;
-	WAIT(ARGS.duration);
-	ARGS.move->retention /= r;
-}
-
 static void set_turning_motion(Enemy *e, cmplx v, real turn_angle, int turn_delay, int turn_duration) {
 	e->move = move_linear(v);
-	INVOKE_SUBTASK_DELAYED(turn_delay, rotate_velocity,
+	INVOKE_SUBTASK_DELAYED(turn_delay, common_rotate_velocity,
 		.move = &e->move,
 		.angle = turn_angle,
 		.duration = turn_duration