1 files changed, 41 insertions, 3 deletions
diff --git a/include/llmr/util/animation.hpp b/include/llmr/util/animation.hpp
index 4095fcba1e..2024fb8753 100644
--- a/include/llmr/util/animation.hpp
+++ b/include/llmr/util/animation.hpp
@@ -2,6 +2,7 @@
 #define LLMR_UTIL_ANIMATION
 
 #include <llmr/util/noncopyable.hpp>
+#include <llmr/platform/platform.hpp>
 
 namespace llmr {
 namespace util {
@@ -12,14 +13,51 @@ public:
         running,
         complete
     };
+    animation(double duration)
+        : start(platform::time()),
+          duration(duration) {}
 
-    animation(double from, double to, double &value, double duration);
+    double progress() const {
+        return (platform::time() - start) / duration;
+    }
+
+    virtual state update() const = 0;
+    virtual ~animation();
+
+protected:
+    const double start, duration;
+};
+
+class ease_animation : public animation {
+public:
+    ease_animation(double from, double to, double& value, double duration);
     state update() const;
 
 private:
-    const double start, duration;
     const double from, to;
-    double &value;
+    double& value;
+};
+
+template <typename T>
+class timeout : public animation {
+public:
+    timeout(T final_value, T& value, double duration)
+        : animation(duration),
+          final_value(final_value),
+          value(value) {}
+
+    state update() const {
+        if (progress() >= 1) {
+            value = final_value;
+            return complete;
+        } else {
+            return running;
+        }
+    }
+
+private:
+    const T final_value;
+    T& value;
 };
 
 }