Significance of Realistic Physics in Simulation Games

Signifi bottom of the inningce of Realistic Physics in Simulation GamesThis dissertation is on the significance of veridical cathartical science in mask supports.Physics in plump fors has spayd a jackpot over the twelvemonths from colonnade risques having no physical science to pauperisation for stimulate huckster having world enligh machinedinal natural philosophy. As the years endure progressed so has the technology giving styles to make the biz much vivid to a portend which makes them al virtu exclusivelyy as legitimate as in accredited life. The question here(predicate) is that do we need such good physics in supports elbow grease in the demolition the human activityors need energize a good conviction take to the woodsing the pole while having a truly experience, pushing the realism a bit go on can cause problems with the spicy being excessively difficult the daily coarse-grainedr.IntroductionThe oldest form of locomote seconds would be c olonnade secret plans where t realiseher was no physics just at once the patchys were still fun to play for the casual bluer. They can be c solelyed the classic example for physics-less fun endorses equal unwraprun, Virtua Racing by SEGA. With time blues standardised The need for revivify came proscribed with hard-nosed acceleration top sped etceteratera they built up on simple machine personalities with various gondolas having contrary type of grip, speed etc. with much advanced Physics processing units came pause physics with destructible models, actual cable gondola damage and in reality earthy handling etc. as take hold ofn in fate for hotfoot charge up and Need for travel rapidly Pro-street these grittys reached the benchmark for physics at their time exclusively were non as favorite as the Need for speed most(prenominal) Wanted and similar Titles with intermediate use of physics. yet the physics in stakes now geezerhood have only change d the impetuous experience in gimpys.My thesis is on how this can be improved and what type of physics should be added and what type to be prevailled so as non to make the game extremely difficult but to a fault improve the gameplay and give a fracture feel of realism.C.1 The logical argument of ProblemThe command of problem in my dissertation is the fun factor in hie games with realistic physics.Racing games ar played for fun and are non forecasted as about physics prototype so a game with exceptionally good game does non have to be an exceptionally good game and vice versa. There has to be a balance between fun and physics in game. A game with precise(prenominal)(prenominal) realistic handling allow for make an immature impostor ram down a circuit which is not very impressive to the player, whereas in a game without friction or skidding, the player pass on not have the feel of physics or realism in a game fashioning it boring again. How to conquer this bal ance in a game is my master(prenominal) objective.In a move game there should be balanced handling and to make it more realistic in the alto soak upher improved effects for drag can be added. Better collision and realistic damage which effects the players operate can garter make the game look more realistic. Things like this are very important nowadays as the competition between games is rising and nearly of the games are coming out with good physics so it becomes a common ground between most games. New type of physics including centre of gravity, collisions effecting the player, g- furiousnesss on the player make loosing handling, blurred vision can be a thing of the future to a fault player fatigue while impetuous can be added in the games in the future to make them stand out.C.2 PurposeThis study is aimed at accomplishing to implement novel type of physics in the game, reservation them more realistic while still being fun to play.The purpose of this study is that when we are adding new type of physics in a game, it should not be so much that it looks more like a physics prototype than a game.MethodologyThis chapter explains how the research for this dissertation is d i.This dissertation is based on experimenting on distinct type of games arcade and realistic alike and similarly based on articles related to this subject.D.1 Study of Existing InformationExisting randomness was collected over the internet mainly from www.google.com and www.gamespot.com. diverse type of physics use in current games was searched and excessively most arcade games. The information was used to commiserate the workings of display day physics realistic games.Information and ideas for diametrical type of physics were also gathered from different gatherings and articles.To better transform how physics rattling works in a game different reference point articles which explain how physics is implemented in games with code were analyse go get a better understandin g about the subject.D.2 ExperementationExperimentation was done by testing different rush along games from arcade games to realistic games to understand the remnant in physics and to understand what type of physics is implemented in present day games.Case study in done in Need for Speed hole-and-corner(prenominal), Burnout nirvana Dirt, Need for Speed Shift and Virtua racer to understand the physics in those games and to understand weather they were successful or not and why. Different types of physics modules were studied in each game, understanding what game used what and to how much realism and how it affected the outcome of the sales of the game which tell which was more popular.Literature check outThis chapter will discuss the articles significant for this research and what use it has in my dissertation.This chapter is in twain parts, one discussing the physics aspect behind making a game and the opposite(a) one discussing about different games, their popularity and wha t type of physics they used.E.1 Physics Review fibre Title communicate along a directly line by author Michael Tanczoshttp//www.gamedev.net/reference/articles/article434.asp This page is about prefatorial motion along a straight line which is supplicated to make a game about any moving be. This helps with the basic physics that require programming of moving objects. point of reference Title The physics of rush by author Brian Beckman http//www.gamedev.net/reference/articles/article1610.asp This is a spatiotemporal guide about how to make rush games. This helps with understanding of present day physics and how they are truly implemented in a game. This also helps me to contrive my own ideas to how to add new physics to the game.Reference http//www.mathworks.com/products/simulink/demos.html?file=/products/demos/shipping/simulink/sldemo_absbrake.htmlThis page helped me understand about braking systems in railroad cars.Reference Title locomote Sports Setup by author Carroll S mith http//needlesslyobscure.wordpress.com/motorsports- clanup/This is a series of tutorials of how to treatedup a car. I used this to make com coife my own vehicle wiles.Reference http//auto.howstuffworks.com/four-wheel- shoot1.htmThis article gave me a better insight of how slip works on a car.E.2 Game ReviewReference http//en.wikipedia.org/wiki/Racing_video_game1970s Title Racing photo Game by WikipediaThis is where I started researching about history of video games and looking into what types of hie are there and how they unquestion able-bodied over time.Reference http//www.taito.com/arc/I visited this website which had old arcade hie which I played and also read about them to get a better understanding of how go games were book binding then.Reference http//forums.atari.com/This is a forum where i read about Atari arcade games.Case StudyIn order to understand the exact nature of physics of present day game sand games from the past, I tested out a few games to understand what different types of physics were applied to them and how they are different from one another. This also helped me to understand how the physics evolved from the past to until now. Another aspect of this study was to understand how the popularity of the game was related to the physics it.F.1 Virtua RacingVirtua Racing was released in 1992 by Sega. This game had fine and clean 3D art for its time. It was based on F1 racing and was one of the ruff arcade racing game of all time. This set the base for racing games that came after this. It had features like minimap track, speedometer etc. basically it had a fully functional HUD for its time. It had 2 views, one third person and the other was rootage person inside the car. It had time chase and also the player could race against the AI cars in the single player mode. In the multiplayer mode, two players could race against each other. It had also implemented different cars so the player could choose between them. They were not jus t artistically different but also were also different in the way they handled. This was a change from the old racing games before this which had only artistic differences between different cars. This game had simulated physic s, there was not an actual assumption engine deciding what the car would do. It was just programmed to skid if the player was taking a turn over a certain speed. It gave a very good feeling of realism.F.2 Need for SpeedNeed for Speed for world-class released in 1994 by Electronic Arts. This game went on to be the most famous game series of all times. Need for Speed was based on street racing. It had good load out of cars which performed very differently from each other. The players had to race in the street with oncoming traffic and against AI player it also had a multiplayer mode which 2 player could play simultaneously. It had a very smooth camera system which allowed the player to play in a third person view or a send-off person view with the player sitti ng inside the car. This game had implemented peddleing system which the player could manually change or set it to self-activating where the ready reckoner would fasten on care of it. This game had very good physics dissemblings which was quite different from its predecessors.Need for speed has impressive art getting better than anyone before them. They had sensory(a) seamless outdoor worlds. These worlds gave an effect of a 3D world unlike the past games. The cars were also very detailed, which ranged from Lamborghini, dodge viper to Mustangs. They were replica of real life cars with all the details in them that could be put at that point of time. The race tracks also had a lot of variance in them which were set in a realistic environment. This game also had weather effects which added more realism to the environment.The sounds implemented were also awe well-nigh. They were very accurate and added to the realism of driving a vehicle as a driver dep sacks on sounds a lot when driving a vehicle. For a game to achieve this, the sounds had to be very accurate which EA achieved with NFS. The simulation engine for this game was also very nice, it gave a clean difference felt in power, speed and handling when driving different cars. Different cars had different statistics and performed better on different tracks.F.1 Need for Speed ShiftThis game of the NFS series was a circuit based game and had more advanced physics to its predecessors. Physic-wise, Need for Speed Shift starts to sound really promising. If done mighty, the 3 different physic models can really make the game enjoyable two for the usual Need for Speed crowd as well as simulation enthusiasts.At low, the driving physics in Shift take slightly getting used to. You cant go into a landmark, hit the apex, and then pump 100% throttle on the way out. Without a doubt, youll inevitably block up up facing the wrong direction, or planted into a wall.Throttle control is absolutely mandatory in Need fo r Speed Shift. Theres no way around this and if you havent got a racing wheel handy, the controller does little to favour irresponsible throttle application or violent channelize input. A lot of importance is given to the throttle of the car making it one the most tweaked feature which takes few time getting used to. payable to the tall end physics in this game it make it quite difficult to play for the casual gamer so the game had features like 10% exceptional grip for the newcomers etc.The car could be customised in a lot of ways to make it affect the physics of the car, this helped out the professional players a lot, but in this game doing anything wrong to the customizations without knowing what the person is doing would make the car difficult to handle making it again unfriendly to the casual gamer.One bug that you very much conform to later on in the game when dealing with heights performance cars or extensively modified tuned cars. Due to the lowering of body work, ad ditional antecedent splitters, under body modifications and different wheel/tyre confederacys, cars seem to run far too low, removing ground clearance and effectively making a car bottom out over even off the tiniest of bumps. This results in a ridiculous and uncontrollable glitch where a car will treat down a straight path.This game boosted of great physics giving realism to the circuit/professional racing and tried to make the game real but they failed in a way. The professional player didnt like the game so much because of the physics not being to real life like with some glitches here and there. Also the car would sometimes out or under manoeuvre in an awkward manner as not pass judgment by the user. As for the casual gamer this is not the game for them, this game is very intense and requires decent number of racing knowledge of knowing when and how to turn/corner at steep speeds, tune the car properly according to your personal needs. So in all it was not a great hit an y ways.F.2 Need For Speed UndercoverThis game does not have realistic physics but it has type of physics which helps the player a lot. The game is made in such a way to make the physics work in the way of the driver to give him/her an awesome driving experience this does not have to be constitutionally as in the real world. This game allows you to pull of the craziest of stuns with easy, this game is built only to give the driver awesome driving experience with computer guidance to accomplish stunts which would not be possible in the real world giving an adrenalin rush to the player.Key to Undercover is what EA is calling the august driving experience. In Undercover this physics system has been given an injection of cool. Think of all the best car chase scenes in movies from the last ten years and youll get an idea of what to expect. EA want you to feel like a skilled stunt driver, and it works. By using a combination of the gas pedal, brake, e-break and gear stick youre able to p ull off stunning looking manoeuvres like reverse clxxx degree turns. Its like you are Jason Statham from the car transporter movies.While we were quite looking forward some potentially funny moments, it seems EA has gone down a more serious route and it works very well indeed. Your culture in the game is to take down the various captains before taking down the whole operation, which is obviously done while driving at devilishly high speeds.The game involves high speed chases over the highway, battling enemy cars, the good old cop chases etc.According to EA the traffic in Undercover is modelled realistically and reacts to your actions. While you can simply push a car over into the way of your target, you could choose to spook a driver of a bus, causing him to jack-knife in the middle of a dual carriageway. Racing at high speed, weaving in and out of traffic appears to offer the kind of thrills that were poorly lacking in the more down to earth and structured ProStreet.As EA repea tedly pointed out during the publishers Games Convention 2008 demonstration, Undercover is all about heroic driving, and theres no better tenability to drive like a stuntman than trying to outrun a swarm of angry police cars. Police chases thankfully return to Need for Speed in Undercover and these guys are aggressive, very aggressive. To begin with theyre not pushovers, but as you progress with the story and increase your level your distinction amongst the police also increases. Before too long theyll spot you on the streets and go after you, hunting you as a pack. If they get you which seems like itll be a symmetric occurrence for less skilful drivers youll have a strike against your car and itll be impounded.Being able to take pictures of the game during gameplay situations is get increasingly common, and with the amount of action on display in Undercover its no surprise to find such a feature here. We didnt see it in action but EA says that the snaps taken have been dubbe d Movie Poster Action Cinematic sounds good to us.Undercover still has some way to go in development (its not out until late November) but its already looking very impressive. Car models are incredibly detailed and procedurally deform based on collisions. The stadiums of the city demo to us were bathed in a gorgeous yellow light that gives the game a highly stylised appearance, and the camera often uncouples from the base of the car in order to give a better, more cinematic view of the action. With months of development left there were obviously a few practiced issues, but on the whole we cant wait to see how the final game looks. As in previous Need for Speed titles the audio is often dominated by the sound of police chatter. We only saw one police chase so cant say how itll sound hours into the game, but they verbalize all the right things to convince us they were on our case.To sum it up, the game is made for the player to have a free stunt filled game which could be advan tageously be pulled of which was not like by the old NFS users. The game wasnt such a big success like the old NFS Most Wanted delinquent the reason that it lacked realist9ic physics but it had player friendly physics which made the game very to finish which much challenge.F.3 Burnout ParadiseThis game was made for its stunts. It had some realistic physics with a lot of importance given to the car damage. The game was a stunt mania. Though it is not lay to say It had realistic physics but it had good amount of it and put to use in the correct places, the made a game for stunts and it was good for it. The car damage actually affected the car performance. Though it did not have really good physics for driving, it had awesome clangoring physics.Burnout 5s speedsters will atomise stupendously during crashes, with more than six times as many breakable pieces in each car compared to Burnout Revenge. This will mean you can tear your car in half, rip the roof off or achieve other satisf ying shunt stunts.The biggest change introduced in Burnout Paradise is the move to an abrupt world, the streets of Paradise city. The entire city is open at the start of the game, with the idea being that you can do whatever you want, whenever you want. Not all of the events are present at the start, look you, and youll have to put in a lot of time to unlock the games roughly 75 cars, but youre never limited in the options before you.The main downtown area of Paradise City is very reminiscent of the downtown tracks in the last couple games, while the western section of the city harkens back to the long, winding, countryside courses of past games as well. A couple of highways will put you dead in the middle of traffic and give you plenty of roads to get up to speed on.In all the game was a success and was loved by crash maniacs but was hated by the driving fanatics. It stood to what it was designed for and achieved worthiness in stunts and crash driving.F.4 DirtDirt 2 as Dirt is a n off-road racing game. I chose this for my case study because this game is somewhat like my project. The game had a lot of focus on suspension and grip, any wrong move by the player could make the car skid off the road, in general the game physics were not player friendly but realistic to give the feel of an off-road racing game with the difficulties involved in an off-road racing game.The physics in Dirt 2 are impeccable. When a truck tumbles after taking a hard landing off a jump, it looks and behaves on the button as it should, which is exact if youre behind the truck anticipating its motion across your driving line. The physics are so realistic that the vibration from my idling engine would shake up the skirt on my dash-mounted hula doll. Physics also come into play in the urine hazards that now dot many of the courses. Driving through water will soggy you down (though this can be advantageous if used strategically), and if youre driving from the cockpit view, my preferred perspective, it will obscure your vision for a few important seconds. Dirt 2 also features night-time races, confined to Rally Cross events, which add a whole new dimension to the game. You will have to avoid shattering your headlights on those closely corners if you want to see, and decide if you want to overtake the leader and risk underestimating a dark turn or let him show you the best line through the corners.Dirt 2 takes the series in a new, quite risky, direction, by taking a more Arcady, fun feel. Although this may have upset some of the hard-core fans of the series, it still unploughed enough difficulty to please all, even the most casual gamers. It blends the realism of off road racing with the enjoyment of a street racing game and it works perfectly, making one of the best racing gamesTo summarise the game is on the best off-road racing game, like burnout nirvana they concentrated on the particular type of physics needed for an off-road racing game.History of Racing GameThe old 2D racing games like Speed Race 1974 where generally black and white and were simple arcade games rather than proper simulations. In this era some basic ideas for racing game were developed like collision detection, HUD displays like Tachometer, speedometer etc. were developed. They were all vertical scrolling games and the player had to race with other AI cars or aspect a high score. This was the base in the 70s for racing games and racing games evolved from this slowly over the course of years.In 1974 Atari released grannie Trak 10 which was the first racing game to implement fixed storage (Read Only Memory). This was a black and white game with an overhead view where the player raced against the clock which made the game non-competitive.The next concept came up was a sort of multiplayer where the player played against each other turn wise by competing against each others scores. This slowly evolved to a proper two player multiplayer where the players were able to p lay with each other simultaneously in a split screen view.In 1976 Crashing race was released which was a multiplayer capable arcade game where the players had to crash into other players to gain score. In this game the collision in racing game was reworked but this was still not a simulation game. The same year Moto-Cross was released which introduced Third-person perspective view into racing games. It achieved this by scrolling the track forward as the player moved and the scene closer to the player kept scaling so that it gave an illusion of perspective. Another game released this year called Fonz introduced feedback in controllers. The next game called Night Driver introduced the first person perspective in racing games. By this time the games were in colour in rather than black and white. From 1970 to 1980 the games generally improved in graphics a little bit.In 1980 Namco released Rally-X which was the first racing game to have background music. The game also had a feature to Scroll the screen to either direction giving actual control over the players view. wherefore in 1982 Namco released Pole position which was the first game to have a track based on an actual circuit. The game had high resolution colour graphics for its time. The game was designed in such a way so that the player had to brake and use controls to manage turns this is where some kind of simulation started in racing games. The player had to race against AI drivers and also had to race against time which made the game interesting. The game also have collisions with boundaries and other cars which caused crashes which were first time implemented in a racing game. The game was the first of its kind to implement simulation at the most basic level which is where racing game simulation started from. The games after this adapted this concept and the racing game simulation started increasing giving a more smell out of realism. The players had to manually hawk gears and use brakes on turns to get turns correctly. Pole position 2 in particular had 3 screen display of the game giving a sense of 3D. In 1980s the this was the general trend in racing games and the simple car simulation were upgraded slowly as new hardware came, with this the graphics of the games also improvedIn 1984 Geoff Crammond developed a racing game simulator RVES for its time on BBC Micro Computer platform. This was the first spirit in game to really simulating driving. Though this is primitive from present standards but for that time this was huge step in racing simulations. In 1985 HangOn was released which was the first game to use 16 bit graphics and also had an improved simulation and AI system compared to the other games out there at that time. In this time more continue was given on improving graphics rather that the simulations. In 1986, Red Racer was the first stereoscopic 3D game. In 1989 Atari released concentrated Drivin this was the first game to use 3D polygons in a game.In 1990 Papyru s Design Group made the first actual 3D racing game simulator and they actually concentrated more on the simulations rather than the graphics. This simulator simulated realistic physics and telemeter.In 1992 Formula one Grand Prix became a hit racing simulation game which had all the drivers from the actual Grand Prix. From 1993 onwards polygons were highly used to make games and each and each game that was coming out had better graphics than the last one. In 1992 the other game which made big news was virtua racing which was not the first 3D racing game but it had the cleanest 3D graphics for the time. It did not have a pixelated look, rather all the textures were very neat and clean for the time.In 1993 Sega came up with Daytona USA which was the first racing game to feature filtered texture-mapped polygons. In 1994 Electronic Arts came up with Need for Speed which became the most popular racing game series of all time. This game had the most realistic audio for its time, detaili ng sounds of engines, gearshifts and tyre squeals to perfection. It also featured vehicle traffic in races. This game had both multiplayer and single player capability.In 1997 Gran Turismo was released for play station and was the best game at that time for its simulation and graphics. This was considered to be the most realistic game of its time.In 1999 Midtown ferocity changed the face of racing game with free roam in games.After this racing games improved generally on the course of time with better and better graphics and simulations. The in vogue(p) racing game that is supposed to come out in 2011 called Need for Speed Shift 2 uses data from actual cars by attaching computers to it and computing every minute detail of the car and driver and have gone so far that they start to bridge the game between real life physics and simulated physics.Racing physicsH.1 BasicsThe very basic idea behind moving a car or any object is F=ma, where F is the force applied, m is the mass of the ob ject and a is the acceleration generated. For a car, the force comes from the engine and the mass of the car is a constant, therefore revising it we would get a=F/m. This would give us the acceleration. This is the base idea which would be used over all in the game. For example, even when the car takes a turn, would be a force applied in a direction from the centre of mass of the car.H.2 forces applied in Linear MotionTorque To go it simple at starting lets consider the car to be going just in a straight line and see what all we would require for the car to run. Now the car engine generates a force which is from spinning motion of the engine shaft through the gearbox, to the axle and finally to the wheels which would drive the car. This gives an understanding that there is a torque applied as a form of force.F=ma This tells us that the acceleration on the car depends on the mass of the car directly considering the force is constant.Equations of linear motionV=U+atv=Final amphetami ne of the caru= sign velocity of the cara= accelerationThe force generated will give us acceleration of the car and thus the speed of the car can be calculated from this.t=time takenS=ut+1/2(a*t2)This equation will be useful to get the position of the car in X, Y, Z direction in 3D space based on the velocity and direction of the car.S= Distance travelledV2=u2 +2aSThis equation calculates look upons independent of time.For all the above equation the time will be considered as t, which is a small change in time. any our calculations will be based on these getting small points on a graph thus getting the whole motion. abrasion Considering the car stop Appling force on the tyres, by newtons second law it would still be in motion as no negative force is applied to it. But in the real world this is not true the car decelerates if there is no force from the engine. This is due to the frictional forces present which act in the oppositeness direction of the car thus acting as negative f orces. This can be categorised in 3 parts in general for a car in order of how strong they are.Internal detrition This friction comes from the moving parts of the vehicle and is very minimal compared to the other two.Ground Friction This friction comes from the friction between the tyres of the car and the ground. It depends on a few things, the larger the tyre of the car the more friction it will have. Also this is also related to the smoothness of the ground and tyres, the smoother tyres give less friction but it to be kept in mind that higher(prenominal) friction tyres have higher grip.Air Friction This is the strongest frictional force of the 3 and exponentially the in depth calculations based on this would come later, for now it is this is just to get an understanding of what all basic forces are applied on a car.h.3 DragThis is the air friction experienced by the car when its driving. The drag is a force value acting opposite the direction the car is travelling. This is th e force required by the car to overcome to be in motion.=Drag ram down=Density of Fluid=Drag CoefficientA=Surface AreaAfter going through a lot of Drag Coefficients, that value for our car habilitate to be 0.50Value0.60Truck0.57Hummer0.46Ford Mustang 19760.45Dodge Viper*List from Wikipedia.orgAir density which is fluid density here is 1.29kg/m3 at sea level, which will be our density.The frontal area of cross section for our car came out to be 2.5m2 which is our area of reference. place the values in the equation of dragThis equalsAll the calculation is are done in metric system.Table for Drag force for our carin NewtonsSpeed M/sSpeed Km/Hr81.2510363252072731.2530108130040144203150180This shows that as the velocity increases drag force exponentially which increases the force required to overcome it.H.4 Centre of MassThe centre of mass (COM) of an object is the mean hole of all the citizenry in the body.Significance of Realistic Physics in Simulation GamesSignificance of Realisti c Physics in Simulation GamesThis dissertation is on the significance of realistic physics in simulation games.Physics in games has changed a lot over the years from arcade games having no physics to Need for Speed Shift having world class physics. As the years have progressed so has the technology giving ways to make the game more realistic to a point which makes them almost as real as in real life. The question here is that do we need such good physics in games cause in the end the players need have a good time playing the game while having a realistic experience, pushing the realism a bit further can cause problems with the game being excessively difficult the daily gamer.IntroductionThe oldest form of racing games would be arcade games where there was no physics but the games were still fun to play for the casual gamer. They can be called the classic example for physics-less fun games like outrun, Virtua Racing by SEGA. With time games like The need for speed came out with reali stic acceleration top sped etc. they built up on car personalities with different cars having different type of grip, speed etc. with more advanced Physics processing units came better physics with destructible models, actual car damage and very realistic handling etc. as seen in Need for Speed Shift and Need for Speed Pro-street these games reached the benchmark for physics at their time but were not as popular as the Need for speed Most Wanted and similar Titles with intermediate use of physics. But the physics in games now days have totally changed the driving experience in games.My thesis is on how this can be improved and what type of physics should be added and what type to be controlled so as not to make the game extremely difficult but also improve the gameplay and give a better feel of realism.C.1 The Statement of ProblemThe statement of problem in my dissertation is the fun factor in racing games with realistic physics.Racing games are played for fun and are not viewed as some physics prototype so a game with exceptionally good game does not have to be an exceptionally good game and vice versa. There has to be a balance between fun and physics in game. A game with very realistic handling will make an immature player crash a lot which is not very impressive to the player, whereas in a game without friction or skidding, the player will not have the feel of physics or realism in a game making it boring again. How to get this balance in a game is my main objective.In a racing game there should be balanced handling and to make it more realistic new improved effects for drag can be added. Better collision and realistic damage which effects the players driving can help make the game look more realistic. Things like this are very important nowadays as the competition between games is rising and most of the games are coming out with good physics so it becomes a common ground between most games. New type of physics including centre of gravity, collisions effec ting the player, g-forces on the player causing loosing handling, blurred vision can be a thing of the future also player fatigue while driving can be added in the games in the future to make them stand out.C.2 PurposeThis study is aimed at accomplishing to implement new type of physics in the game, making them more realistic while still being fun to play.The purpose of this study is that when we are adding new type of physics in a game, it should not be so much that it looks more like a physics prototype than a game.MethodologyThis chapter explains how the research for this dissertation is done.This dissertation is based on experimenting on different type of games arcade and realistic alike and also based on articles related to this subject.D.1 Study of Existing InformationExisting information was collected over the internet mainly from www.google.com and www.gamespot.com.Different type of physics used in current games was searched and also about arcade games. The information was u sed to understand the working of present day physics realistic games.Information and ideas for different type of physics were also gathered from different forums and articles.To better understand how physics actually works in a game different reference articles which explain how physics is implemented in games with code were studied go get a better understanding about the subject.D.2 ExperementationExperimentation was done by testing different racing games from arcade games to realistic games to understand the difference in physics and to understand what type of physics is implemented in present day games.Case study in done in Need for Speed Undercover, Burnout paradise Dirt, Need for Speed Shift and Virtua racer to understand the physics in those games and to understand weather they were successful or not and why. Different types of physics modules were studied in each game, understanding what game used what and to how much realism and how it affected the outcome of the sales of th e game which tell which was more popular.Literature ReviewThis chapter will discuss the articles significant for this research and what use it has in my dissertation.This chapter is in two parts, one discussing the physics aspect behind making a game and the other one discussing about different games, their popularity and what type of physics they used.E.1 Physics ReviewReference Title Motion along a straight line by author Michael Tanczoshttp//www.gamedev.net/reference/articles/article434.asp This page is about basic motion along a straight line which is required to make a game about any moving body. This helps with the basic physics that require programming of moving objects.Reference Title The physics of racing by author Brian Beckman http//www.gamedev.net/reference/articles/article1610.asp This is a comprehensive guide about how to make racing games. This helps with understanding of present day physics and how they are actually implemented in a game. This also helps me to formul ate my own ideas to how to add new physics to the game.Reference http//www.mathworks.com/products/simulink/demos.html?file=/products/demos/shipping/simulink/sldemo_absbrake.htmlThis page helped me understand about braking systems in cars.Reference Title Motor Sports Setup by author Carroll Smith http//needlesslyobscure.wordpress.com/motorsports-setup/This is a series of tutorials of how to setup a car. I used this to make compute my own vehicle simulations.Reference http//auto.howstuffworks.com/four-wheel-drive1.htmThis article gave me a better insight of how slip works on a car.E.2 Game ReviewReference http//en.wikipedia.org/wiki/Racing_video_game1970s Title Racing Video Game by WikipediaThis is where I started researching about history of video games and looking into what types of racing are there and how they developed over time.Reference http//www.taito.com/arc/I visited this website which had old arcade racing which I played and also read about them to get a better understandin g of how racing games were back then.Reference http//forums.atari.com/This is a forum where i read about Atari arcade games.Case StudyIn order to understand the exact nature of physics of present day game sand games from the past, I tested out a few games to understand what different types of physics were applied to them and how they are different from one another. This also helped me to understand how the physics evolved from the past to until now. Another aspect of this study was to understand how the popularity of the game was related to the physics it.F.1 Virtua RacingVirtua Racing was released in 1992 by Sega. This game had excellent and clean 3D graphics for its time. It was based on F1 racing and was one of the best arcade racing game of all time. This set the base for racing games that came after this. It had features like minimap track, speedometer etc. basically it had a fully functional HUD for its time. It had 2 views, one third person and the other was first person insi de the car. It had time chase and also the player could race against the AI cars in the single player mode. In the multiplayer mode, two players could race against each other. It had also implemented different cars so the player could choose between them. They were not just artistically different but also were also different in the way they handled. This was a change from the old racing games before this which had only artistic differences between different cars. This game had simulated physic s, there was not an actual simulation engine deciding what the car would do. It was just programmed to skid if the player was taking a turn over a certain speed. It gave a very good feeling of realism.F.2 Need for SpeedNeed for Speed for first released in 1994 by Electronic Arts. This game went on to be the most famous game series of all times. Need for Speed was based on street racing. It had good load out of cars which performed very differently from each other. The players had to race in th e street with oncoming traffic and against AI player it also had a multiplayer mode which 2 player could play simultaneously. It had a very smooth camera system which allowed the player to play in a third person view or a first person view with the player sitting inside the car. This game had implemented gearing system which the player could manually change or set it to automatic where the computer would take care of it. This game had very good physics simulations which was quite different from its predecessors.Need for speed has impressive graphics getting better than anyone before them. They had open seamless outdoor worlds. These worlds gave an effect of a 3D world unlike the past games. The cars were also very detailed, which ranged from Lamborghini, dodge viper to Mustangs. They were replica of real life cars with all the details in them that could be put at that point of time. The race tracks also had a lot of variance in them which were set in a realistic environment. This ga me also had weather effects which added more realism to the environment.The sounds implemented were also awesome. They were very accurate and added to the realism of driving a vehicle as a driver depends on sounds a lot when driving a vehicle. For a game to achieve this, the sounds had to be very accurate which EA achieved with NFS. The simulation engine for this game was also very nice, it gave a clean difference felt in power, speed and handling when driving different cars. Different cars had different statistics and performed better on different tracks.F.1 Need for Speed ShiftThis game of the NFS series was a circuit based game and had more advanced physics to its predecessors. Physic-wise, Need for Speed Shift starts to sound really promising. If done right, the 3 different physic models can really make the game enjoyable both for the usual Need for Speed crowd as well as simulation enthusiasts.At first, the driving physics in Shift take some getting used to. You cant go into a corner, hit the apex, and then pump 100% throttle on the way out. Without a doubt, youll inevitably end up facing the wrong direction, or planted into a wall.Throttle control is absolutely mandatory in Need for Speed Shift. Theres no way around this and if you havent got a racing wheel handy, the controller does little to favour irresponsible throttle application or violent steering input. A lot of importance is given to the throttle of the car making it one the most tweaked feature which takes some time getting used to.Due to the high end physics in this game it made it quite difficult to play for the casual gamer so the game had features like 10% extra grip for the newcomers etc.The car could be customised in a lot of ways to make it affect the physics of the car, this helped out the professional players a lot, but in this game doing anything wrong to the customizations without knowing what the person is doing would make the car difficult to handle making it again unfriendly to th e casual gamer.One glitch that you often encounter later on in the game when dealing with high performance cars or extensively modified tuned cars. Due to the lowering of body work, additional front splitters, under body modifications and different wheel/tyre combinations, cars seem to run far too low, removing ground clearance and effectively making a car bottom out over even the tiniest of bumps. This results in a ridiculous and uncontrollable glitch where a car will continue down a straight path.This game boosted of great physics giving realism to the circuit/professional racing and tried to make the game real but they failed in a way. The professional player didnt like the game so much because of the physics not being to real life like with some glitches here and there. Also the car would sometimes out or under manoeuvre in an awkward manner as not expected by the user. As for the casual gamer this is not the game for them, this game is very intense and requires decent amount of racing knowledge of knowing when and how to turn/corner at high speeds, tune the car properly according to your personal needs. So in all it was not a great hit either ways.F.2 Need For Speed UndercoverThis game does not have realistic physics but it has type of physics which helps the player a lot. The game is made in such a way to make the physics work in the way of the driver to give him/her an awesome driving experience this does not have to be entirely as in the real world. This game allows you to pull of the craziest of stuns with easy, this game is built only to give the driver awesome driving experience with computer guidance to accomplish stunts which would not be possible in the real world giving an adrenalin rush to the player.Key to Undercover is what EA is calling the heroic driving experience. In Undercover this physics system has been given an injection of cool. Think of all the best car chase scenes in movies from the last ten years and youll get an idea of what to expect. EA want you to feel like a skilled stunt driver, and it works. By using a combination of the gas pedal, brake, e-break and gear stick youre able to pull off stunning looking manoeuvres like reverse 180 degree turns. Its like you are Jason Statham from the Transporter movies.While we were quite looking forward some potentially funny moments, it seems EA has gone down a more serious route and it works very well indeed. Your goal in the game is to take down the various captains before taking down the whole operation, which is obviously done while driving at insanely high speeds.The game involves high speed chases over the highway, battling enemy cars, the good old cop chases etc.According to EA the traffic in Undercover is modelled realistically and reacts to your actions. While you can simply push a car over into the way of your target, you could choose to spook a driver of a bus, causing him to jack-knife in the middle of a dual carriageway. Racing at high speed, weaving in a nd out of traffic appears to offer the kind of thrills that were severely lacking in the more down to earth and structured ProStreet.As EA repeatedly pointed out during the publishers Games Convention 2008 demonstration, Undercover is all about heroic driving, and theres no better reason to drive like a stuntman than trying to outrun a swarm of angry police cars. Police chases thankfully return to Need for Speed in Undercover and these guys are aggressive, very aggressive. To begin with theyre not pushovers, but as you progress through the story and increase your level your notoriety amongst the police also increases. Before too long theyll spot you on the streets and go after you, hunting you as a pack. If they get you which seems like itll be a regular occurrence for less skilful drivers youll have a strike against your car and itll be impounded.Being able to take pictures of the game during gameplay situations is becoming increasingly common, and with the amount of action on di splay in Undercover its no surprise to find such a feature here. We didnt see it in action but EA says that the snaps taken have been dubbed Movie Poster Action Cinematic sounds good to us.Undercover still has some way to go in development (its not out until late November) but its already looking very impressive. Car models are incredibly detailed and procedurally deform based on collisions. The areas of the city demonstrated to us were bathed in a gorgeous yellow light that gives the game a highly stylised appearance, and the camera often uncouples from the rear of the car in order to give a better, more cinematic view of the action. With months of development left there were obviously a few technical issues, but on the whole we cant wait to see how the final game looks. As in previous Need for Speed titles the audio is often dominated by the sound of police chatter. We only saw one police chase so cant say how itll sound hours into the game, but they said all the right things to convince us they were on our case.To sum it up, the game is made for the player to have a free stunt filled game which could be easily be pulled of which was not like by the old NFS users. The game wasnt such a big success like the old NFS Most Wanted due the reason that it lacked realist9ic physics but it had player friendly physics which made the game very to finish which much challenge.F.3 Burnout ParadiseThis game was made for its stunts. It had some realistic physics with a lot of importance given to the car damage. The game was a stunt mania. Though it is not correct to say It had realistic physics but it had good amount of it and put to use in the correct places, the made a game for stunts and it was good for it. The car damage actually affected the car performance. Though it did not have really good physics for driving, it had awesome crash physics.Burnout 5s speedsters will atomise stupendously during crashes, with more than six times as many breakable pieces in each car co mpared to Burnout Revenge. This will mean you can tear your car in half, rip the roof off or achieve other satisfying shunt stunts.The biggest change introduced in Burnout Paradise is the move to an open world, the streets of Paradise city. The entire city is open at the start of the game, with the idea being that you can do whatever you want, whenever you want. Not all of the events are present at the start, mind you, and youll have to put in a lot of time to unlock the games roughly 75 cars, but youre never limited in the options before you.The main downtown area of Paradise City is very reminiscent of the downtown tracks in the last couple games, while the western section of the city harkens back to the long, winding, countryside courses of past games as well. A couple of highways will put you dead in the middle of traffic and give you plenty of roads to get up to speed on.In all the game was a success and was loved by crash maniacs but was hated by the driving fanatics. It stood to what it was designed for and achieved excellence in stunts and crash driving.F.4 DirtDirt 2 as Dirt is an off-road racing game. I chose this for my case study because this game is somewhat like my project. The game had a lot of focus on suspension and grip, any wrong move by the player could make the car skid off the road, in general the game physics were not player friendly but realistic to give the feel of an off-road racing game with the difficulties involved in an off-road racing game.The physics in Dirt 2 are impeccable. When a truck tumbles after taking a hard landing off a jump, it looks and behaves exactly as it should, which is critical if youre behind the truck anticipating its motion across your driving line. The physics are so realistic that the vibration from my idling engine would shake the skirt on my dash-mounted hula doll. Physics also come into play in the water hazards that now dot many of the courses. Driving through water will slow you down (though this can be advantageous if used strategically), and if youre driving from the cockpit view, my preferred perspective, it will obscure your vision for a few crucial seconds. Dirt 2 also features night-time races, confined to Rally Cross events, which add a whole new dimension to the game. You will have to avoid smashing your headlights on those tight corners if you want to see, and decide if you want to overtake the leader and risk underestimating a dark turn or let him show you the best line through the corners.Dirt 2 takes the series in a new, quite risky, direction, by taking a more Arcady, fun feel. Although this may have upset some of the hard-core fans of the series, it still kept enough difficulty to please all, even the most casual gamers. It blends the realism of off road racing with the enjoyment of a street racing game and it works perfectly, making one of the best racing gamesTo summarise the game is on the best off-road racing game, like burnout paradise they concentrated on the particular type of physics needed for an off-road racing game.History of Racing GameThe old 2D racing games like Speed Race 1974 where generally black and white and were simple arcade games rather than proper simulations. In this era some basic concepts for racing game were developed like collision detection, HUD displays like Tachometer, speedometer etc. were developed. They were all vertical scrolling games and the player had to race with other AI cars or setting a high score. This was the base in the 70s for racing games and racing games evolved from this slowly over the course of years.In 1974 Atari released Gran Trak 10 which was the first racing game to implement ROM (Read Only Memory). This was a black and white game with an overhead view where the player raced against the clock which made the game non-competitive.The next concept came up was a sort of multiplayer where the player played against each other turn wise by competing against each others scores. This slowly evolve d to a proper two player multiplayer where the players were able to play with each other simultaneously in a split screen view.In 1976 Crashing race was released which was a multiplayer capable arcade game where the players had to crash into other players to gain score. In this game the collision in racing game was reworked but this was still not a simulation game. The same year Moto-Cross was released which introduced Third-person perspective view into racing games. It achieved this by scrolling the track forward as the player moved and the scene closer to the player kept scaling so that it gave an illusion of perspective. Another game released this year called Fonz introduced feedback in controllers. The next game called Night Driver introduced the first person perspective in racing games. By this time the games were in colour rather than black and white. From 1970 to 1980 the games generally improved in graphics a little bit.In 1980 Namco released Rally-X which was the first raci ng game to have background music. The game also had a feature to Scroll the screen to either direction giving actual control over the players view. Then in 1982 Namco released Pole position which was the first game to have a track based on an actual circuit. The game had high resolution colour graphics for its time. The game was designed in such a way so that the player had to brake and use controls to manage turns this is where some kind of simulation started in racing games. The player had to race against AI drivers and also had to race against time which made the game interesting. The game also featured collisions with boundaries and other cars which caused crashes which were first time implemented in a racing game. The game was the first of its kind to implement simulation at the most basic level which is where racing game simulation started from. The games after this adapted this concept and the racing game simulation started increasing giving a more sense of realism. The playe rs had to manually shift gears and use brakes on turns to get turns correctly. Pole position 2 in particular had 3 screen display of the game giving a sense of 3D. In 1980s the this was the general trend in racing games and the simple car simulation were upgraded slowly as new hardware came, with this the graphics of the games also improvedIn 1984 Geoff Crammond developed a racing game simulator RVES for its time on BBC Micro Computer platform. This was the first step in game to really simulating driving. Though this is primitive from present standards but for that time this was huge step in racing simulations. In 1985 HangOn was released which was the first game to use 16 bit graphics and also had an improved simulation and AI system compared to the other games out there at that time. In this time more concern was given on improving graphics rather that the simulations. In 1986, Red Racer was the first stereoscopic 3D game. In 1989 Atari released Hard Drivin this was the first game to use 3D polygons in a game.In 1990 Papyrus Design Group made the first actual 3D racing game simulator and they actually concentrated more on the simulations rather than the graphics. This simulator simulated realistic physics and telemeter.In 1992 Formula one Grand Prix became a hit racing simulation game which had all the drivers from the actual Grand Prix. From 1993 onwards polygons were highly used to make games and each and every game that was coming out had better graphics than the last one. In 1992 the other game which made big news was virtua racing which was not the first 3D racing game but it had the cleanest 3D graphics for the time. It did not have a pixelated look, rather all the textures were very neat and clean for the time.In 1993 Sega came up with Daytona USA which was the first racing game to feature filtered texture-mapped polygons. In 1994 Electronic Arts came up with Need for Speed which became the most popular racing game series of all time. This game had th e most realistic audio for its time, detailing sounds of engines, gearshifts and tyre squeals to perfection. It also featured vehicle traffic in races. This game had both multiplayer and single player capability.In 1997 Gran Turismo was released for play station and was the best game at that time for its simulation and graphics. This was considered to be the most realistic game of its time.In 1999 Midtown Madness changed the face of racing game with free roam in games.After this racing games improved generally on the course of time with better and better graphics and simulations. The latest racing game that is supposed to come out in 2011 called Need for Speed Shift 2 uses data from actual cars by attaching computers to it and computing every minute detail of the car and driver and have gone so far that they start to bridge the game between real life physics and simulated physics.Racing physicsH.1 BasicsThe very basic idea behind moving a car or any object is F=ma, where F is the fo rce applied, m is the mass of the object and a is the acceleration generated. For a car, the force comes from the engine and the mass of the car is a constant, therefore rewriting it we would get a=F/m. This would give us the acceleration. This is the base idea which would be used over all in the game. For example, even when the car takes a turn, would be a force applied in a direction from the centre of mass of the car.H.2 forces applied in Linear MotionTorque To keep it simple at starting lets consider the car to be going just in a straight line and see what all we would require for the car to run. Now the car engine generates a force which is from spinning motion of the engine shaft through the gearbox, to the axle and finally to the wheels which would drive the car. This gives an understanding that there is a torque applied as a form of force.F=ma This tells us that the acceleration on the car depends on the mass of the car directly considering the force is constant.Equations of linear motionV=U+atv=Final velocity of the caru=Initial velocity of the cara= accelerationThe force generated will give us acceleration of the car and thus the speed of the car can be calculated from this.t=time takenS=ut+1/2(a*t2)This equation will be useful to get the position of the car in X, Y, Z direction in 3D space based on the velocity and direction of the car.S= Distance travelledV2=u2 +2aSThis equation calculates values independent of time.For all the above equation the time will be considered as t, which is a small change in time. All our calculations will be based on these getting small points on a graph thus getting the whole motion.Friction Considering the car stops Appling force on the tyres, by newtons second law it would still be in motion as no negative force is applied to it. But in the real world this is not true the car decelerates if there is no force from the engine. This is due to the frictional forces present which act in the opposite direction of the car t hus acting as negative forces. This can be categorised in 3 parts in general for a car in order of how strong they are.Internal Friction This friction comes from the moving parts of the vehicle and is very minimal compared to the other two.Ground Friction This friction comes from the friction between the tyres of the car and the ground. It depends on a few things, the larger the tyre of the car the more friction it will have. Also this is also related to the smoothness of the ground and tyres, the smoother tyres give less friction but it to be kept in mind that higher friction tyres have higher grip.Air Friction This is the strongest frictional force of the 3 and exponentially the in depth calculations based on this would come later, for now it is this is just to get an understanding of what all basic forces are applied on a car.h.3 DragThis is the air friction experienced by the car when its driving. The drag is a force value acting opposite the direction the car is travelling. This is the force required by the car to overcome to be in motion.=Drag Force=Density of Fluid=Drag CoefficientA=Surface AreaAfter going through a lot of Drag Coefficients, that value for our car fit to be 0.50Value0.60Truck0.57Hummer0.46Ford Mustang 19760.45Dodge Viper*List from Wikipedia.orgAir density which is fluid density here is 1.29kg/m3 at sea level, which will be our density.The frontal area of cross section for our car came out to be 2.5m2 which is our area of reference.Putting the values in the equation of dragThis equalsAll the calculation is are done in metric system.Table for Drag force for our carin NewtonsSpeed M/sSpeed Km/Hr81.2510363252072731.2530108130040144203150180This shows that as the velocity increases drag force exponentially which increases the force required to overcome it.H.4 Centre of MassThe centre of mass (COM) of an object is the mean location of all the masses in the body.