Merge pull request #1 from pranansh-s/pranansh-s-basic-physics-engine

Create Basic-Physics-Engine.md

Projects/3-Advanced/Basic-Physics-Engine.md

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+# Basic-Physics-Engine
+
+**Tier:** 3-Advanced
+
+Today's games have amazing physics engine that might have someday made you curious as to *the behind the scenes*. It's suprisingly not that hard to make.
+So today you can try to make one of your own in a language of your own choice. The goal of this project is to create a ragbody physics engine using a concept called Verlet Integration.
+
+This concept utilizes the basic properties of vectors in physics to make ragdoll physics which u can use to make strings and cloths in your own games.
+
+**The above project may seem hard but i encourage you to explore the topic and try to build something basic from the same**
+
+## User Stories
+
+-   [ ] User can add point objects that will be affected by physical mechanics (gravity, velocity, air resistance etc).
+-   [ ] User can connect point objects with inextensible strings that restrict their positions
+-   [ ] User can add forces to those point objects
+-   [ ] User can start and stop simulations
+
+## Bonus features
+
+-   [ ] User can restrict position of points
+-   [ ] User can control set of points with his/her keyboard
+
+## Useful links and resources
+
+- [Verlet Integration](https://en.wikipedia.org/wiki/Verlet_integration)
+
+## Example projects
+
+- [Verlet Physics Engine](https://github.com/pranansh-s/Verlet-Integration-using-SDL)
+- [PhysicsJS](https://github.com/search?q=physics)