add World.update with Duration argument (#152)

Quillraven · Aug 30, 2024 · c370093 · c370093
1 parent 8b17bb5
commit c370093
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diff --git a/src/commonMain/kotlin/com/github/quillraven/fleks/world.kt b/src/commonMain/kotlin/com/github/quillraven/fleks/world.kt
@@ -5,6 +5,8 @@ import com.github.quillraven.fleks.collection.MutableEntityBag
 import kotlinx.serialization.Contextual
 import kotlinx.serialization.Serializable
 import kotlin.native.concurrent.ThreadLocal
+import kotlin.time.Duration
+import kotlin.time.DurationUnit
 
 /**
  * Snapshot for an [entity][Entity] that contains its [components][Component] and [tags][EntityTag].
@@ -448,6 +450,14 @@ class World internal constructor(
         }
     }
 
+    /**
+     * Updates all [enabled][IntervalSystem.enabled] [systems][IntervalSystem] of the world
+     * using the given [deltaTime].
+     */
+    fun update(deltaTime: Duration) {
+        update(deltaTime.toDouble(DurationUnit.MILLISECONDS).toFloat())
+    }
+
     /**
      * Removes all [entities][Entity] of the world and calls the
      * [onDispose][IntervalSystem.onDispose] function of each system.

diff --git a/src/commonTest/kotlin/com/github/quillraven/fleks/WorldTest.kt b/src/commonTest/kotlin/com/github/quillraven/fleks/WorldTest.kt
@@ -5,6 +5,7 @@ import com.github.quillraven.fleks.World.Companion.inject
 import com.github.quillraven.fleks.collection.compareEntity
 import com.github.quillraven.fleks.collection.compareEntityBy
 import kotlin.test.*
+import kotlin.time.Duration.Companion.milliseconds
 
 private data class WorldTestComponent(
     var x: Float = 0f,
@@ -316,6 +317,27 @@ internal class WorldTest {
         assertEquals(0, w.system<WorldTestIteratingSystem>().numCalls)
     }
 
+    @Test
+    fun updateWorldWithDurationOf1() {
+        val w = configureWorld {
+            injectables {
+                add("42")
+            }
+
+            systems {
+                add(WorldTestIntervalSystem())
+                add(WorldTestIteratingSystem())
+            }
+        }
+        w.system<WorldTestIteratingSystem>().enabled = false
+
+        w.update(1.milliseconds)
+
+        assertEquals(1f, w.deltaTime)
+        assertEquals(1, w.system<WorldTestIntervalSystem>().numCalls)
+        assertEquals(0, w.system<WorldTestIteratingSystem>().numCalls)
+    }
+
     @Test
     fun removeAllEntities() {
         val w = configureWorld {}