Checkpoint

1 files changed, 28 insertions, 0 deletions

diff --git a/composeApp/src/commonMain/kotlin/coffee/liz/ecs/physics/CollisionTick.kt b/composeApp/src/commonMain/kotlin/coffee/liz/ecs/physics/CollisionTick.kt
new file mode 100644
index 0000000..bc34ac1
--- /dev/null
+++ b/composeApp/src/commonMain/kotlin/coffee/liz/ecs/physics/CollisionTick.kt
@@ -0,0 +1,28 @@
+package coffee.liz.ecs.physics
+
+import coffee.liz.ecs.Rect
+import coffee.liz.ecs.World
+
+internal class CollisionTick<Outside>(
+    private val collisionResolver: CollisionResolver<Outside>
+) {
+    fun runTick(world: World<Outside>) {
+        // Eh, fast enough for now. Don't need to do any fancy collision detection. There's always later to improve if
+        // it's that bad.
+        world.query(Collidable::class, Position::class).forEach { a ->
+            world.query(Collidable::class, Position::class).forEach { b ->
+                val aHitBoxes = a.get(Position::class).let { pos -> a.get(Collidable::class).hitboxes.map {
+                    Rect(pos.vec2, it.dimensions)
+                }}
+                val bHitBoxes = b.get(Position::class).let { pos -> b.get(Collidable::class).hitboxes.map {
+                    Rect(pos.vec2, it.dimensions)
+                }}
+
+                val collisionDetected = aHitBoxes.any { a -> bHitBoxes.any { b -> a.overlaps(b) } }
+                if (collisionDetected) {
+                    collisionResolver.resolveCollision(world, a, b)
+                }
+            }
+        }
+    }
+}
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