From e01f9779030955d828d0c7c8668651fd4686ec58 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Matt=C3=A9o=20Delabre?= <spam@delab.re>
Date: Mon, 4 May 2020 18:46:26 +0200
Subject: [PATCH] Add boids by clicking

---
 index.mjs | 22 ++++++++++++++++------
 1 file changed, 16 insertions(+), 6 deletions(-)

diff --git a/index.mjs b/index.mjs
index 882b24e..80e2ddc 100644
--- a/index.mjs
+++ b/index.mjs
@@ -37,13 +37,23 @@ window.onresize = updateSize;
 
 const activeBoids = [];
 
-for (let i = 0; i < 300; ++i)
+const addBoids = (pos, count) =>
 {
-    activeBoids.push({
-        pos: new Vector(200 + (i % 2) * (-400), 0),
-        vel: new Vector(Math.random() * 100, Math.random() * 100),
-    });
-}
+    for (let i = 0; i < count; ++i)
+    {
+        activeBoids.push({
+            pos: pos.clone(),
+            vel: new Vector(Math.random(), Math.random()),
+        });
+    }
+};
+
+boidsCanvas.onclick = ev =>
+{
+    const pos = new Vector(ev.offsetX, ev.offsetY);
+    pos.sub(center);
+    addBoids(pos, 50);
+};
 
 let paused = false;
 let lastTime = null;