This website uses cookies to ensure you have the best experience. Learn more

Unity 3d Physics Engine Essay

1659 words - 7 pages

The Physics Engine of Unity 3D

What is Unity 3D 3

What is a Physics Engine 3

Physical variables 4
rigid bodies 5
collision detection 6
joints 7
cloth & hair 9
ragdolls 10

Nvidia PhysX 10
Sources 12

What is Unity 3D?

Unity 3D is a multiplatform game engine. With Unity3D you are able to develop games for PC, Web, Xbox360, Playstation3, Wii and all mobile devices (e.g. iOS, Android and Windows Phone 8).
The Unity Game Engine is used by a lot of developers because it has a lot of features and it is
pretty easy to handle.
Unity 3D is downloadable for free but can be upgraded to Unity Pro which ...view middle of the document...

 More broadly, it is the general analysis of nature, conducted in order to understand how the universe behaves."

The Physics is roughly subdivided into the following parts:


- mechanics
- thermodynamics
- acoustics
- optics
- electrodynamics
- atom & nuclear physics
- relativistic mechanics
- quantum mechanics

Obviously not all parts that are mentioned here are actually used or needed for the physics engine of a computer game. If for example the law of thermodynamics would be used in computer games most of the laser weapons would not be possible because of the heat they would produce.
The quantum mechanics, atom & nuclear physics and the electrodynamics are also generally not used in computer games.
The relativistic mechanics are normally also not used in computer games. If you would use them, it would last way too long to travel from point to point in a space simulation for example.

Optical Effects in a game are normally calculated from the graphics engine and are not part of the physics.

The acoustics or the "game sound" are generally calculated from the game engine itself and are also not part of the physics engine.

So the last part that is left is the mechanics. If we talk about a physics engine we generally refer to the mechanics.

Physical variables

In a modern physics engine the following physical variables are integrated:

- Force
- Momentum
- moment of torque
- angular momentum
- Place
- Velocity
- angular Velocity
- center of gravity

All of these physical variables are saved for every ingame asset and build the base for simulations.

The most important task for a physics engine is the equation of motion. It defines in which place an object is in a specific time.
Every physics engine is of course different in its features and ways to calculate everything, but however there are some basic techniques, that every physics engine can handle.
These are:

- rigid bodies
- collision detection
- joints
- cloth & hair
- ragdolls

rigid bodies

rigid bodies are for example:

- cuboids
- spheres
- polygon nets
- etc.

Every Element, that is important for the physics engine is built out of a rigid body. Like I mentioned before, every element that is used to build the game world has its own physical variables (e.g. force, place or velocity) saved.

collision detection

Collision detection starts to take place when at least two rigid bodies begin to overlap.
If the physics engine would scan the original rigid bodies, it would take way too much computing time to calculate how the objects interact with each other. Therefore the physics engine simplifies the geometry of a rigid body in different ways.

1. Axis aligned bounding box

This is the easiest and fastest but also imprecise method to simplify the rigid bodies. A cuboid, parallel to the world axis is placed around the object. For the collision detection only the cuboid is calculated.

2....

Other Essays Like Unity 3d Physics Engine

The Versatility And Flexibility Of OLED's

1014 words - 5 pages In April 1, 2002, organic light emitting diodes gain rise in the scientific community with their published, more practical form at Ames Laboratory. “Scientists at the U.S. Department of Energy's Ames Laboratory, in collaboration with scientists at the University of Michigan, Ann Arbor, have developed and demonstrated a novel, fluorescence-based chemical sensor that is more compact, versatile and less expensive than existing technology of its

Comparing The Moral Virtues Of Antony And Julian The Apostate

1103 words - 5 pages Roman emperor Julian the Apostate and Christian leader Antony both exhibited many qualities of character during their existence. Both of them led very distinctive lives although shared several ethical values. Book 25 of “The Later Roman Empire” and the book “Early Christian Lives” show concrete evidence of this. In the following essay, I will argue how both leaders’ lives were devoted to their religious beliefs and their mutual cardinal virtues

Living In A Cashless Society

1637 words - 7 pages Money in a traditional sense no longer exists. Money is becoming much of a concept than a physical material, and most ordinary bitter have not see the reality of the switch. People today are using credit and debit cards on a regular basis and in everyday situations such as meal purchased at fast food, highway tolls, clothing, groceries, gas stations, etc. all of these means of systems could be regarded as a cashless society or world. The question

The French And Indian War: The "Real" First World War

1955 words - 8 pages The Seven Years War, or more commonly referred to as “The French and Indian War”, has been called the true First World War. In this book The French and Indian War: Deciding the Fate of North America, the author and historian Walter R. Borneman paints a detailed and elaborate picture that justifies the claim of it being the first true war of global proportions. If ever there truly was a climax to the never ending feud of the European powers

Is The Use Of Animals In Medical Research A Necessary Measure?

1513 words - 7 pages Throughout history, animals have been used in experiments to test product safety and obtain medical knowledge that benefits both humans and animals alike. Every year there are numerous medical breakthroughs, such as medications and surgical instruments, which are tested on animals to insure their safety before they are deemed acceptable for human use. Even though the results of the experiments saved millions of human lives, they are also

Education And The Evolving Job Market

2363 words - 10 pages The lives of students today are changing. They are preparing for lives and jobs that have never before existed. If teachers hope to have a significant and worthwhile impact on these quickly changing lives, they must change the way they think, prepare, and instruct our future generations. Children cannot afford to have teachers who remain stagnant in their methods and ideals. Students crave instructors that are willing to allow them to tap

Young And Relentless

1737 words - 7 pages There are numerous influences that can be responsible of teenager’s behaviors and attitude as they develop. One factor that is important to these behaviors is parental figures being over involved or uninvolved in their children’s lives. Many of these effects include illegal substance abuse, rising sexual activity, underage alcohol consumption, and tobacco use. Studies show parental participation plays a key role in the characteristics developed

The Natural Law Theory

1231 words - 5 pages Obeying by the natural law theory is the only true and moral way to live life; especially a life lived in God’s image. God’s presence is a guiding factor to obtaining a moral and virtuous life, which can only be obtained by following the natural law theory. God created a set of laws as a supreme guide for humans to live life, like any law these laws were created to ensure wellbeing for everyone. The laws he created are the civil law, the natural

Resolved: Presidential Signing Statements Threaten To Undermine The Rule Of Law And The Separation Of Powers

1811 words - 8 pages The subject of signing statements has created much debate among the houses of Congress, government officials, and the public alike. These signing statements fall under the categories of constitutional and legislative history signing statements. Constitutional signing statements are those in which the president deems certain provisions of the legislation as unconstitutional, therefore they should not be enforced (Bradley & Posner, 2006

Oppressive Systems Of Government In Egypt And Animal Farm

1529 words - 7 pages As in Egypt, Orwell demonstrates through his allegorical novel “Animal Farm” that leaders are able to establish and maintain power over a people, and in turn create an oppressive and corrupt government system. Orwell shows the significant difference in the education and levels of knowledge in the animals, and how the government takes advantage of this difference. The split between the levels of intelligence is portrayed in the first chapter when

The Pathway To Psychosis

1415 words - 6 pages “How all occasions do inform against me” is a line from act IIII, scene IIII of William Shakespeare’s Hamlet. This line, spoken by Hamlet, expresses his emotional state as he is currently overwhelmed by the death of his father, the king of Denmark, and the situation surrounding it. After Hamlet learns of his father’s death he finds out that his mother has married Claudius, Hamlet’s uncle. On top of all of that, Hamlet soon after

Related Papers

The Physics Engine Of Unity 3 D

1656 words - 7 pages The Physics Engine of Unity 3D What is Unity 3D 3 What is a Physics Engine 3 Physical variables 4 rigid bodies 5 collision detection 6 joints 7 cloth & hair 9 ragdolls 10 Nvidia PhysX 10 Sources 12 What is Unity 3D? Unity 3D is a multiplatform game engine. With Unity3D you are able to develop games for PC, Web

Game Engines: Mobile Platforms And Choosing The Right Engine For Your Project

3273 words - 14 pages , animation, physics, and networking, and usually includes a tool chain and content pipeline“. Game engines are powerful sets of tools congregated into one (hopefully) easy-to- use interface that allows the skilled user to make interactive software and applications. It is up to the developer(s) to find an engine that is capable of the project that is being envisioned. Is the project 2d or 3d? Will it require the use of particle effects

Electric Blender Essay

4066 words - 17 pages detection, dynamics engine, and programmable logic. It also allows the creation of stand-alone, real-time applications ranging from architectural visualization to video game construction. A fully-integrated node-based compositor within the rendering pipeline [edit] User interface Blender has had a reputation as being difficult to learn for users accustomed to other 3D graphics software. Nearly every function has a direct keyboard shortcut and there

The Separation Of Capital Ownership And Control

1577 words - 7 pages The argument of whether the separation of capital ownership and control is an efficient form of organization has constantly been a controversial issue. The criticism whether the controllers’ act is in the best interest of the owners’ wills never end as long as hired managers operate management. As the number of public companies has been increasing over the course of this century, meanwhile the American style of contact based corporation has