Now have a timer for animations that does ticks with deltatime...maybe it works.

tests/animate2.cpp

@@ -51,12 +51,16 @@ Animate2 crafter() {
   return {sheet, sequence, transform};
 }
 
+void FAKE_RENDER() {
+  std::this_thread::sleep_for(Random::milliseconds(5, 32));
+}
+
 void PLAY_TEST(Animate2 &anim) {
   anim.play();
 
   while(anim.playing) {
     anim.update();
-    std::this_thread::sleep_for(Random::milliseconds(1, 100));
+    FAKE_RENDER();
   }
 
   REQUIRE(anim.playing == false);
@@ -114,6 +118,7 @@ TEST_CASE("new animation system", "[animation-new]") {
   };
 }
 
+
 TEST_CASE("confirm frame sequencing works", "[animation-new]") {
   textures::init();
   animation::init();
@@ -165,15 +170,37 @@ TEST_CASE("confirm transition changes work", "[animation-new]") {
 
   anim.play();
 
+  sf::Clock clock;
+  clock.start();
+  sf::Time start;
+  sf::Time delta;
+
+
   while(anim.playing) {
+    start = clock.getElapsedTime();
+
     anim.update();
     anim.motion(pos, scale);
     std::this_thread::sleep_for(10ms);
     fmt::println("POSITION: {},{}; SCALE: {},{}; current: {}; subframe: {}",
         pos.x, pos.y, scale.x, scale.y, anim.$sequence.current, anim.$sequence.subframe);
+
+    delta = clock.getElapsedTime() - start;
+    fmt::println("FRAME RATE {}", 1.0f / delta.asSeconds());
   }
 
   REQUIRE(anim.playing == false);
   REQUIRE(pos != sf::Vector2f{0,0});
   REQUIRE(scale != sf::Vector2f{0,0});
 }
+
+TEST_CASE("playing with delta time", "[animation-new]") {
+  animate2::Timer timer;
+
+  for(int i = 0; i < 20; i++) {
+    timer.begin();
+    FAKE_RENDER();
+    auto [tick_count, alpha] = timer.commit();
+    fmt::println("tick: {}, alpha: {}", tick_count, alpha);
+  }
+}