Checkpoint

1 files changed, 17 insertions, 0 deletions

diff --git a/composeApp/src/commonMain/kotlin/coffee/liz/ecs/TickedSystem.kt b/composeApp/src/commonMain/kotlin/coffee/liz/ecs/TickedSystem.kt
new file mode 100644
index 0000000..f512ca7
--- /dev/null
+++ b/composeApp/src/commonMain/kotlin/coffee/liz/ecs/TickedSystem.kt
@@ -0,0 +1,17 @@
+package coffee.liz.ecs
+
+import kotlin.time.Duration
+
+abstract class TickedSystem<Outside>(
+    protected val tickRate: Duration,
+    private var lastTick: Duration = Duration.ZERO
+): System<Outside> {
+    abstract fun update(world: World<Outside>, state: Outside, ticks: Int)
+
+    override fun update(world: World<Outside>, state: Outside, deltaTime: Duration) {
+        val ticks = ((deltaTime - lastTick) / tickRate).toInt()
+        lastTick = if (ticks == 0) (lastTick + deltaTime).also {
+            update(world, state, ticks)
+        } else Duration.ZERO
+    }
+}
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