From 009a1b0b1a638aaf4532601709013baf6c54d85e Mon Sep 17 00:00:00 2001
From: Gabriel Kaszewski <gabrielkaszewski@gmail.com>
Date: Thu, 23 Apr 2026 13:24:06 +0200
Subject: [PATCH] gravity

---
 app/about/page.tsx            |   2 +-
 app/layout.tsx                |   2 +
 app/page.tsx                  |   2 +-
 components/gravity-toggle.tsx |  36 ++++++
 lib/gravity-engine.ts         | 223 ++++++++++++++++++++++++++++++++++
 5 files changed, 263 insertions(+), 2 deletions(-)
 create mode 100644 components/gravity-toggle.tsx
 create mode 100644 lib/gravity-engine.ts

diff --git a/app/about/page.tsx b/app/about/page.tsx
index 3e65f09..49dc026 100644
--- a/app/about/page.tsx
+++ b/app/about/page.tsx
@@ -67,7 +67,7 @@ const AboutPage = () => {
   const age = calculateAge("2002-02-27");
 
   return (
-    <div className="flex w-full flex-col items-center gap-8 p-4 pt-24 text-white">
+    <div className="flex w-full flex-col items-center gap-8 p-4 pt-24 text-white gravity-body">
       <div className="flex flex-col items-center justify-center gap-2 p-4 backdrop-blur-sm glass-effect glossy-effect bottom gloss-highlight rounded-lg shadow-lg">
         <Image
           src="/images/ja.avif"
diff --git a/app/layout.tsx b/app/layout.tsx
index 9fb03b5..c1af468 100644
--- a/app/layout.tsx
+++ b/app/layout.tsx
@@ -3,6 +3,7 @@ import { Geist, Geist_Mono } from "next/font/google";
 import "./globals.css";
 import Navbar from "@/components/navbar";
 import Footer from "@/components/footer";
+import GravityToggle from "@/components/gravity-toggle";
 
 const geistSans = Geist({
   variable: "--font-geist-sans",
@@ -98,6 +99,7 @@ export default function RootLayout({
 
         <Navbar />
         {children}
+        <GravityToggle />
         <Footer />
       </body>
     </html>
diff --git a/app/page.tsx b/app/page.tsx
index 5458528..b17f598 100644
--- a/app/page.tsx
+++ b/app/page.tsx
@@ -7,7 +7,7 @@ import { skills, jobs } from "@/lib/data";
 
 export default function Home() {
   return (
-    <div className="flex flex-col items-center w-full">
+    <div className="flex flex-col items-center w-full gravity-body">
       <Hero />
       <div className="container mx-auto px-4">
         <AboutSummary />
diff --git a/components/gravity-toggle.tsx b/components/gravity-toggle.tsx
new file mode 100644
index 0000000..6940df6
--- /dev/null
+++ b/components/gravity-toggle.tsx
@@ -0,0 +1,36 @@
+"use client";
+
+import { useState, useEffect, useRef } from "react";
+import { GravityEngine } from "@/lib/gravity-engine";
+import { Magnet } from "lucide-react";
+
+export default function GravityToggle() {
+  const [isActive, setIsActive] = useState(false);
+  const engineRef = useRef<GravityEngine | null>(null);
+
+  useEffect(() => {
+    engineRef.current = new GravityEngine();
+    return () => engineRef.current?.stop();
+  }, []);
+
+  const toggleGravity = () => {
+    if (!engineRef.current) return;
+
+    if (isActive) {
+      engineRef.current.stop();
+    } else {
+      engineRef.current.start();
+    }
+    setIsActive(!isActive);
+  };
+
+  return (
+    <button
+      onClick={toggleGravity}
+      className="fixed bottom-4 right-4 p-3 bg-yellow-400 text-black rounded-full shadow-lg z-50 hover:bg-yellow-500 transition-colors"
+      title="Toggle Gravity"
+    >
+      <Magnet size={24} />
+    </button>
+  );
+}
diff --git a/lib/gravity-engine.ts b/lib/gravity-engine.ts
new file mode 100644
index 0000000..80a9625
--- /dev/null
+++ b/lib/gravity-engine.ts
@@ -0,0 +1,223 @@
+interface PhysicsBody {
+  el: HTMLElement;
+  x: number;
+  y: number;
+  vx: number;
+  vy: number;
+  isDragging: boolean;
+  startX: number;
+  startY: number;
+}
+
+export class GravityEngine {
+  private bodies: PhysicsBody[] = [];
+  private animationFrameId: number | null = null;
+  private isRunning = false;
+
+  INITIAL_FORCE = 10;
+
+  start() {
+    if (this.isRunning) return;
+    this.isRunning = true;
+
+    const containers = document.querySelectorAll(".gravity-body");
+    const targetElements: HTMLElement[] = [];
+
+    // Helper to recursively drill down to leaf nodes
+    const extractLeaves = (el: HTMLElement) => {
+      // 1. Define "solid" elements that should fall as one single piece
+      const isSolid = ["SVG", "IMG", "BUTTON", "IFRAME", "A"].includes(
+        el.tagName.toUpperCase(),
+      );
+
+      // 2. Base case: If it's solid, or has no children, it's a target
+      if (isSolid || el.children.length === 0) {
+        // Only extract elements that actually take up visual space
+        if (el.offsetWidth > 0 && el.offsetHeight > 0) {
+          targetElements.push(el);
+        }
+        return;
+      }
+
+      el.style.width = `${el.offsetWidth}px`;
+      el.style.height = `${el.offsetHeight}px`;
+
+      Array.from(el.children).forEach((child) => {
+        extractLeaves(child as HTMLElement);
+      });
+    };
+
+    containers.forEach((container) => {
+      const htmlContainer = container as HTMLElement;
+
+      // Lock the main container's dimensions
+      htmlContainer.style.width = `${htmlContainer.offsetWidth}px`;
+      htmlContainer.style.height = `${htmlContainer.offsetHeight}px`;
+
+      // Start the recursive extraction on its direct children
+      Array.from(htmlContainer.children).forEach((child) => {
+        extractLeaves(child as HTMLElement);
+      });
+    });
+
+    const initialStates = targetElements.map((el) => {
+      const rect = el.getBoundingClientRect();
+      return { el, rect };
+    });
+
+    this.bodies = initialStates.map(({ el, rect }) => {
+      // Lock dimensions so it doesn't warp when pulled out of flex/grid
+      el.style.width = `${rect.width}px`;
+      el.style.height = `${rect.height}px`;
+      el.style.margin = "0px";
+
+      // Snap to fixed positioning at its exact current visual location
+      el.style.position = "fixed";
+      el.style.left = "0px";
+      el.style.top = "0px";
+      el.style.transform = `translate(${rect.left}px, ${rect.top}px)`;
+
+      const body: PhysicsBody = {
+        el: el,
+        x: rect.left,
+        y: rect.top,
+        vx: (Math.random() - 0.5) * 8, // slight explosion outward
+        vy: (Math.random() - 0.5) * 5, // slight pop upward
+        isDragging: false,
+        startX: 0,
+        startY: 0,
+      };
+
+      this.attachMouseEvents(body);
+      return body;
+    });
+
+    this.tick();
+  }
+
+  stop() {
+    this.isRunning = false;
+    if (this.animationFrameId) cancelAnimationFrame(this.animationFrameId);
+
+    // Reset all children back to their normal document flow
+    this.bodies.forEach((body) => {
+      body.el.style.transform = "";
+      body.el.style.position = "";
+      body.el.style.left = "";
+      body.el.style.top = "";
+      body.el.style.width = "";
+      body.el.style.height = "";
+      body.el.style.margin = "";
+    });
+
+    // Reset parent containers
+    const containers = document.querySelectorAll(".gravity-body");
+    containers.forEach((container) => {
+      const htmlContainer = container as HTMLElement;
+      htmlContainer.style.width = "";
+      htmlContainer.style.height = "";
+    });
+
+    this.bodies = [];
+  }
+
+  private attachMouseEvents(body: PhysicsBody) {
+    // Prevent default drag behaviors that interfere with physics
+    body.el.ondragstart = () => false;
+
+    body.el.addEventListener("pointerdown", (e) => {
+      body.isDragging = true;
+      body.startX = e.clientX;
+      body.startY = e.clientY;
+      body.vx = 0;
+      body.vy = 0;
+      body.el.setPointerCapture(e.pointerId);
+    });
+
+    body.el.addEventListener("pointermove", (e) => {
+      if (!body.isDragging) return;
+
+      // Calculate velocity based on mouse movement for the "throw"
+      body.vx = e.movementX * 0.5;
+      body.vy = e.movementY * 0.5;
+
+      body.x += e.movementX;
+      body.y += e.movementY;
+    });
+
+    body.el.addEventListener("pointerup", (e) => {
+      body.isDragging = false;
+      body.el.releasePointerCapture(e.pointerId);
+
+      // The Drag vs. Click Resolver
+      const deltaX = Math.abs(e.clientX - body.startX);
+      const deltaY = Math.abs(e.clientY - body.startY);
+
+      // If the user moved the mouse less than 5px, treat it as a click
+      if (deltaX > 5 || deltaY > 5) {
+        // It was a drag. Prevent links from firing.
+        e.preventDefault();
+        e.stopPropagation();
+      }
+    });
+
+    // Catch clicks at the capture phase to stop them if we were dragging
+    body.el.addEventListener(
+      "click",
+      (e) => {
+        const deltaX = Math.abs(e.clientX - body.startX);
+        const deltaY = Math.abs(e.clientY - body.startY);
+        if (deltaX > 5 || deltaY > 5) {
+          e.preventDefault();
+          e.stopPropagation();
+        }
+      },
+      true,
+    );
+  }
+
+  private tick = () => {
+    if (!this.isRunning) return;
+
+    const gravity = 0.5;
+    const bounce = -0.7;
+    const floorY = window.innerHeight;
+
+    this.bodies.forEach((body) => {
+      if (body.isDragging) {
+        // Only update visually while dragging, physics are paused
+        body.el.style.position = "fixed";
+        body.el.style.left = "0px";
+        body.el.style.top = "0px";
+        body.el.style.transform = `translate(${body.x}px, ${body.y}px)`;
+        return;
+      }
+
+      // Apply Gravity
+      body.vy += gravity;
+      body.x += body.vx;
+      body.y += body.vy;
+
+      // Apply Air Friction
+      body.vx *= 0.99;
+      body.vy *= 0.99;
+
+      const rect = body.el.getBoundingClientRect();
+
+      // Floor Collision
+      if (body.y + rect.height > floorY) {
+        body.y = floorY - rect.height;
+        body.vy *= bounce;
+        body.vx *= 0.9; // Ground friction
+      }
+
+      // Render Step
+      body.el.style.position = "fixed";
+      body.el.style.left = "0px";
+      body.el.style.top = "0px";
+      body.el.style.transform = `translate(${body.x}px, ${body.y}px)`;
+    });
+
+    this.animationFrameId = requestAnimationFrame(this.tick);
+  };
+}