From d983ef6b8d66d916ed7502cf6d35b573c5366257 Mon Sep 17 00:00:00 2001
From: Star Rauchenberger <fefferburbia@gmail.com>
Date: Mon, 5 Jul 2021 10:39:06 -0400
Subject: Added fading in/out sprites

---
 src/animation_system.cpp | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

(limited to 'src/animation_system.cpp')

diff --git a/src/animation_system.cpp b/src/animation_system.cpp
index ce5cc02..73d30d5 100644
--- a/src/animation_system.cpp
+++ b/src/animation_system.cpp
@@ -166,6 +166,25 @@ void AnimationSystem::tick(double dt) {
       }
     }
   }
+
+  fadingTimer_.accumulate(dt);
+  while (fadingTimer_.step()) {
+    for (Sprite& sprite : game_.getSprites() | game_.spriteView()) {
+      if (sprite.isAnimated) {
+        if (sprite.shouldBeFadedIn && sprite.opacity < 1.0) {
+          sprite.opacity += 0.05;
+          if (sprite.opacity > 1.0) {
+            sprite.opacity = 1.0;
+          }
+        } else if (!sprite.shouldBeFadedIn && sprite.opacity > 0.0) {
+          sprite.opacity -= 0.05;
+          if (sprite.opacity < 0.0) {
+            sprite.opacity = 0.0;
+          }
+        }
+      }
+    }
+  }
 }
 
 void AnimationSystem::setSpriteDirection(int spriteId, Direction dir) {
-- 
cgit 1.4.1