Add a_tension_span

1 files changed, 61 insertions, 0 deletions

diff --git a/2026/games_submissions/crm148/vec2.js b/2026/games_submissions/crm148/vec2.js
new file mode 100644
index 0000000..230dad9
--- /dev/null
+++ b/2026/games_submissions/crm148/vec2.js
@@ -0,0 +1,61 @@
+
+export default class Vec2 {
+    constructor(x, y) {
+        this.x = x;
+        this.y = y;
+    }
+
+    static zero() {
+        return new Vec2(0, 0);
+    }
+
+    static fromHeading(radians) {
+        return new Vec2(Math.cos(radians), Math.sin(radians));
+    }
+
+    static fromHeadingLength(radians, length) {
+        return Vec2.fromHeading(radians).scale(length);
+    }
+
+    length() {
+        return Math.sqrt(Math.pow(this.x, 2) + Math.pow(this.y, 2));
+    }
+
+    heading() {
+        return Math.atan2(this.y, this.x);
+    }
+
+    scale(factor) {
+        this.x *= factor;
+        this.y *= factor;
+        return this;
+    }
+
+    scaled(factor) {
+        return new Vec2(this.x * factor, this.y * factor);
+    }
+
+    ofLength(newLength) {
+        return this.normalized().scale(newLength);
+    }
+
+    add(v2) {
+        return new Vec2(this.x + v2.x, this.y + v2.y);
+    }
+
+    sub(v2) {
+        return new Vec2(this.x - v2.x, this.y - v2.y);
+    }
+
+    normalize() {
+        var len = this.length();
+        this.x = this.x / len;
+        this.y = this.y / len;
+        return this;
+    }
+
+    normalized() {
+        var len = this.length();
+        return new Vec2(this.x / len, this.y / len);
+    }
+}