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MIT 6 837 - A Coke’s Life

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Final Report for 6.837 Term Project A Coke’s Life 1. Abstract:The project animates what a bottle of Coke sees during its life. The Coke originally sits on a shelf in astore besides many of its siblings. It is picked up by a person, taken to the cashier to get paid for, carriedto a classroom, drunk by the person, and then thrown into a trash bin. The camera is always fixed about1 foot from the Coke, and the Coke is always centered in the view. The position and orientation of theCoke remain fixed in the view, whereas the liquid in the bottle and the objects in the background changecontinuously, through which the viewers can infer what is really happening. The main points in theanimation project: make it work, make it nice, and make it fun. The main tool we used in the projectwas Alias, an animation tool on Athena. 2. Team Members Yu Sui ( [email protected])Ruopeng Wang ([email protected])Xianfeng Zhao ([email protected]) 3. Introduction The main plot of the project, i.e., presenting a Coke’s life from its own angle of view, came from a TVadvertisement made by Cocacola. We adopted the plot in our project for the following reasons: (1) It is animation.Through the project we will be able to use and learn standard tools and techniques in modelling andanimation, and get a better understanding of the concepts we learned in 6.837 lectures. (2) It is challenging.Aside from the logical difficulty of imagining what the scene should look like, many technicaldifficulties are involved in the plot, e.g., the animation of liquid deformation. (3) It is fun.People rarely have the chance to see the world from some other’s view, the project provides people withthe opportunity and fun to view the world from a totally different angle. 4. Goals In our proposal, our plot was divided into two scenes, the supermarket scene and the classroom scene. Ineach of the scenes, the plot was further divided into several sections for animation and engineeringreasons. (1) The supermarket scene. Section 1: Camera moves from outside into the market, passes several grocery aisles, focuses on thebeverage aisles where our Coke resides. Camera moves on until the Coke is in the center of theviewport. The Coke will always be sitting in the center of our viewport thereafter. Only changes in thebackground indicate the movement of the Coke and imply what is happening.Main objects in the scene: market, shelves, merchandise on the shelves, the Coke. Section 2: A big hand rises into viewport , grabs the Coke bottle.Main objects: Shelves, Coke, hand. Section 3: The Coke is taken out of the shelf by the hand, goes down with the hand. At last what we seein the background is the legs and feet of the man. The Coke is facing up, still grabbed by the hand.Main objects: Shelf, Coke, hand, legs and feet of the person. Section 4: The man walks to the cashier’s desk. All we can see is the movement of the legs and feet ofthe person.Main objects: Shelf, Coke, hand, legs, feet of the person. Section 5: The Coke is put onto the cashier’s desk. The big hand releases the bottle, and moves out ofthe viewport (to take out money, maybe). The hand moves back in after a while with a bill, puts it on thedesk and moves out. Another hand (the cashier’s) appears, gets the bill, moves out.Main objects: Cashier’s desk, Coke. Section 6: The Coke is again grabbed by the big hand. Then the background changes. A bag appears.The Coke is taken to the open "mouth" of the bag. The hand releases. The Coke drops into the bag.Lights off.Main objects: Coke, hand, bag. Section 7: All Dark. (2) The classroom scene Section 8: Lights on. The big hand moves into the scene and grabs the Coke (inside the bag). The Cokeis taken out of the bag, put on a student desk. From the background viewer could tell it’s a classroom.Main objects: Coke, hand, desks, chairs, some very simple persons. Section 9: The Coke is grabbed by the big hand, lift up, brought near the person’s open mouth, tilted andthe liquid flows out of the bottle and into the mouth.Main objects: Coke, hand, face. Section 10: The Coke is put down on the desk. The hand releases and moves out of the viewport.Main objects: Coke, hand, desks, chairs Section 9 and Section 10 might be repeated several times until the Coke is drunk up. Section 11: Class is over. The bottle is grabbed by the big hand again, thrown into a trash bin.Main objects: Coke, hand, trash bin. In a summary, in the project we were trying to do three things: (a) model and render objects in the realworld with adequate details. (b) animate human body movements, and (c) animate the continuousdeformation of liquid.5. Achievements (1) Object modelling The Alias tool we used has very powerful object modelling capabilities. It turned out to be much easierthan we expected to construct individual object and to make it look realistic using primitives providedby Alias. The figure below shows a Tropicana box created by Alias. The figure of the Coke bottle showsanother example.However, It also turned out to be much harder than we expected to construct a scene with many objectsthat looks realistic. Although it is not hard to make each of the individual objects with fine details tolook realistic, with a large number of objects in the scene, the speed of the system is reduceddramatically. It becomes very slow to move things around in the scene, and even slower to render thescene. Consequently, when we were working on big scenes, we had to make the scene have as fewobjects as possible, and make every object in the scene a s simple as possible. The figure below shows ascene at the cashier.(2) Modelling of human bodies The first obstacle in making human bodies was making a human-like person in Alias. We were thinkingof making a very real person like those dinosaurs in Jurassic Park at first, but later we found that it wasunrealistic to achieve this effect in a such short time. So, we decided to use simple objects and curves tobuild the human instead. However, the question of how to make the human body relaistic arised. Wewent through the human models that were ever built in this class and found that people can build very"good" " funny" person by just using geomtric primitives. One day, one of us happened to watch"Dilbert" cartoon on TV, which inspired us to make a Dilbert-like person in our project. The next obstacle was to animate the "Dilbert" vividly. Alias has abundent on-line help on this part, which makes it easy to make some simple moves of an object.


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MIT 6 837 - A Coke’s Life

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