Created a nice utility library for doing animations, and used it in the ritual crafting UI.

tests/animation.cpp

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+#include <catch2/catch_test_macros.hpp>
+#include "animation.hpp"
+#include "dinkyecs.hpp"
+#include "config.hpp"
+#include <iostream>
+
+using namespace components;
+using namespace textures;
+
+TEST_CASE("animation easing tests", "[animation]") {
+  Animation anim;
+
+  anim.easing = ease::NONE;
+  float res = anim.twitching();
+  REQUIRE(res == 0.0);
+
+  anim.easing = ease::SINE;
+  anim.subframe = 1.0f;
+  res = anim.twitching();
+  REQUIRE(!std::isnan(res));
+
+  anim.easing = ease::OUT_CIRC;
+  res = anim.twitching();
+  REQUIRE(!std::isnan(res));
+
+  anim.easing = ease::OUT_BOUNCE;
+  res = anim.twitching();
+  REQUIRE(!std::isnan(res));
+
+  anim.easing = ease::IN_OUT_BACK;
+  res = anim.twitching();
+  REQUIRE(!std::isnan(res));
+
+  anim.easing = ease::FUCKFACE;
+  bool throws = false;
+  try { anim.twitching(); } catch(...) { throws = true; }
+  REQUIRE(throws);
+}
+
+
+TEST_CASE("animation utility API", "[animation]") {
+  textures::init();
+  animation::init();
+
+  auto blanket = textures::get("ritual_crafting_area");
+  auto anim = animation::load("ritual_blanket");
+
+  anim.play();
+
+  while(animation::apply(anim, blanket)) {
+    fmt::println("animation: {}", anim.subframe);
+  }
+}