add subprojects

1 files changed, 51 insertions, 0 deletions

diff --git a/centipede/js/game/object.js b/centipede/js/game/object.js
new file mode 100644
index 0000000..1e22ec6
--- /dev/null
+++ b/centipede/js/game/object.js
@@ -0,0 +1,51 @@
+game.Object = (object) => {
+  object.dx = object.dx ?? 0;
+  object.dy = object.dy ?? 0;
+  object.rot = object.rot ?? 0;
+  object.drot = object.drot ?? 0;
+  object.alive = object.alive ?? true;
+
+  object.poisonedTimer = object.poisonedTimer ?? 4000;
+  object.poisoned = false;
+  object.elapsedPoisonedTimer = 0;
+  object.poison = () => {
+    object.poisoned = true;
+    object.elapsedPoisonedTimer = 0;
+  }
+
+  object.intersects = (other) => {
+    if (object.x + object.width <= other.x) {
+      return false;
+    }
+    if (object.x >= other.x + other.width) {
+      return false;
+    }
+    if (object.y + object.height <= other.y) {
+      return false;
+    }
+    if (object.y >= other.y + other.height) {
+      return false;
+    }
+    return true;
+  }
+
+  object.update = (elapsedTime) => {
+    if (object.poisoned && object.y >= game.height - object.height) {
+      object.elapsedPoisonedTimer += elapsedTime;
+      if (object.elapsedPoisonedTimer > object.poisonedTimer) {
+        object.poisoned = false;
+        object.elapsedPoisonedTimer = 0;
+      }
+    }
+
+    object.x += (object.poisoned ? 0 : object.dx)*elapsedTime;
+    object.y += (object.poisoned ? 0.2 : object.dy)*elapsedTime;
+    object.rot += object.drot*elapsedTime;
+  };
+
+  object.draw = (elapsedTime) => {
+    object.sprite.draw(elapsedTime, object);
+  };
+
+  return object;
+};