All of the original features now work: simple, flipped, scaled, toggled, looped and stationary is replaced by ease2::scale_only.

animate2.cpp

@@ -35,6 +35,8 @@ namespace animate2 {
   // need one for each kind of thing to animate
   // NOTE: possibly find a way to only run apply on frame change?
   void Animate2::apply(sf::Sprite& sprite) {
+    dbc::check(!$transform.simple, "can't call ::apply() on a simple animation, only ::motion()");
+
     dbc::check($sequence.current < $frame_rects.size(), "current frame past $frame_rects");
     // NOTE: pos is not updated yet
     auto& rect = $frame_rects.at($sequence.current);
@@ -76,8 +78,15 @@ namespace animate2 {
   void Animate2::motion(sf::Sprite& sprite, sf::Vector2f pos, sf::Vector2f scale) {
     $transform.lerp($sequence, pos, scale);
 
+    if($transform.flipped) {
+      scale.x *= -1;
+    }
+
     sprite.setPosition(pos);
-    sprite.setScale(scale);
+
+    if($transform.scaled) {
+      sprite.setScale(scale);
+    }
   }
 
   std::pair<int, double> Animate2::commit() {