From b48c353c145461ae45df028c59fa71ad8cac6279 Mon Sep 17 00:00:00 2001
From: Klemen Plestenjak <plestenjak.klemen@gmail.com>
Date: Fri, 29 Dec 2023 20:26:46 +0100
Subject: [PATCH] Update instead of overwrite value in easing system

---
 game/systems/s_animation.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/game/systems/s_animation.c b/game/systems/s_animation.c
index 4f83248..8579a51 100644
--- a/game/systems/s_animation.c
+++ b/game/systems/s_animation.c
@@ -66,6 +66,7 @@ void updateEasingSystem(ecs_iter_t *it) {
         easing[i].elapsed += dt;
         f32 alpha = easing[i].elapsed / easing[i].duration;
         alpha = BZ_MIN(1.0f, alpha);
+        f32 prevX = easing[i].x;
         easing[i].x = bzEase(easing[i].easingFunc, alpha);
 
         const Easing *e = &easing[i];
@@ -74,10 +75,13 @@ void updateEasingSystem(ecs_iter_t *it) {
         x = e->easeStart + e->easeTarget * x + e->easeOffset;
         // Outer
         x = e->start + e->target * x + e->offset;
+        easing->x = x;
 
         u8 *compData = ecs_get_mut_id(ECS, entity, easing[i].compID);
         compData += easing[i].memberOffset;
+        f32 *out = (f32 *) compData;
 
-        *(f32 *) compData = x;
+        *out -= prevX;
+        *out += x;
     }
 }