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Archive for Computer Programming

So you want to be a video game programmer? – part 4 – School

Sep01

…CONTINUED from PART 3. Or start at Part 1.

There are two basic approaches: home training and school. Personally I’d recommend both.

Let’s talk school. In my day (1980s) pre-collegiate computer classes barely existed, and if they did they were mostly about Pascal programming and data-structures. They often used p-System pascal, an old-school predecessor to Java!

College Computer Science programs followed (and I imagine they still do) a traditional regimen of stuff like Algorithms, Data-structures, Architecture, Compilers, AI, Theory of Computation etc. They rarely taught or emphasized programming itself. Personally, while I have this training myself (several years at the M.I.T. AI Lab working toward my PhD) I got it long after teaching myself to program and after having 5 published video games on the market.

What I was taught at M.I.T. (1992-94) was way too theoretical to make a good starting place for a young programmer. Don’t get me wrong, I learned a tremendous amount there and it really upped my game. But it was best digested in light of several years practical experience. So I don’t personally think that traditional CS is the way to start. But if you are really serious about computers it is a very solid choice for your higher education. You just need to be ready for it.

And here is the dirty secret about the University Education system: It’s made up of classes. Yep. Your four (or more) year educational experience will just be the summation of eight semesters worth of classes, usually 4-5 per semester. The exact order of these, which topics, and how they are taught will be at the whim of all sorts of varied factors. For example: scheduling, major and general requirements, teacher sabbaticals, friends, personal choice, etc. The school itself will have broad requirements (like you must have 3 science and 2 history classes). You major/department will have more specific ones (like requires 14 classes in the major, with 7 out of the 10 “core” classes — as defined by the department). So everyone’s education is different. That can be a good thing, but it’s less coherent.

And even within a particular class type, like say: Computer Architecture, the classes vary wildly and are rarely designed to work with each other or be taken in a particular order. The school and department might have determined that it should have a Computer Architecture class, but each teacher is free (somewhat) to determine the specific content and style of his or her class. Teachers vary wildly in teaching ability. I mean WILDLY! Even at the best schools. In fact, the teaching quality at M.I.T. was considerably lower than at my undergraduate school, Haverford College. It’s not that the M.I.T. professors weren’t as smart — they were plenty brilliant — but they leaned more toward being famous researchers while Haverford selected people who excelled first and foremost at undergraduate education.

In any case, even within a particular major, say Computer Science, the slate of courses you take might not form a coherent picture. There isn’t much effort made to ensure this. It’s more like, “we need a Compilers course, who wants to teach it?” and then that professor goes off and builds their plan. I’m sure there are constraints and feedback, but it being part of a single coherent program doesn’t seem to be one of them. And teacher style so heavily influences the experience. Now, don’t get me wrong, many of these courses are really good. But they require that you, the student, do a lot of the work integrating the bigger picture. Which really, for first rate minds trying to absorb advanced modalities of thought, is totally fine. It’s just not exactly the same as learning a complex practical field like programming.

But let me speak briefly about the classic topics:

Theory of Computation – Is the cool (but highly esoteric) field of math that endeavors to prove things about what can and not be computed. It includes a lot of discussions about theoretical computers like the Turing Machine and what sorts of computational problems are equivalently complex. This is actually very useful, but only if you have already encountered practical programming tasks. Otherwise it will probably just confuse the bejesus out of you.

Compilers – Is about writing compilers, and how computational semantics are transformed. This is bordering on totally useless for the novice programmer. I myself found it fascinating, but I wrote several compilers. Again, you want to study this several years into your career.

Algorithms – Is the formal study of different methods of problem solving. This is where stuff like the difference between a bubble and an insertion sort goes. Every programmer should know the basic algorithms, but you can read a beginning book fairly early in the learning process and pickup the basics. The college version is much more rigorous. But in the early stages you can lean on libraries which encapsulate these solutions.

Data-structures – These relate closely to Algorithms, but are methods for actually storing data in computers. Different data-structures lend themselves better to different algorithms. The mistake made by a purely academic approach is in thinking that they make a lot of sense without some practical knowledge of the kind of things that you do in normal computing. Still, Algorithms and Data-structures are essential at all levels of programming beyond the totally trivial, and these are the most practical of the classic topics.

AI (Artificial Intelligence) – Can be extremely useful to the game programmer. Games, after all, need enemies that appear intelligent, and in addition have to solve all sorts of big computational problems which use AI techniques (like moving the camera around etc.). But as taught in school it’s pretty theoretical and you need at least a couple years of practical skills first.

Architecture – Is the study of computer hardware, usually micro-processors. A lot of people hate this topic, not being hardware guys. And although you can learn this anytime, you really should. It’s impossible to be a truly great programmer without knowing something about the hardware that makes it all happen. If you are into compilers, this is even more true. I personally loved these classes.

I also want to mention the subject of Programming Languages. Most schools rightfully view the choice of specific programming language as fairly “academic” (or not actually). In the above classes advanced CS guys learn that all normal computer languages are “Turing Complete” and therefore equivalent to each other. Any program in one could be converted to a program in another by automated means (this is what compilers do). Languages all have the same basic features. And if it’s missing one you can write the feature within itself. So who cares which one you use?

This makes a certain academic sense, but in practice, the choice of programming language is vital. And the budding programmer should be introduced to a wide variety of them at a steady yet-not-overwhelming pace so that they learn the fundamentals common to all and do not become one of those lame-ass programmers who are afraid to learn a new programming language. I can be programming in any new language in one day, proficient in a week, expert in a month, master in six. It’s just not that hard.

Schools often have a particular language that they favor. These days it might be Java. In my era it was either Pascal or C. For many schools it’s still probably C/C++. At M.I.T. it was Scheme/Common Lisp! But often professors are also free to just teach a class in a different language. I had an undergraduate AI class all in Prolog. For the gifted student this is a good thing, having a whole class in a new language, as it’s a decent enough emersion to actually learn a new mode of thought (the Prolog class substantially improved my programming even though I’ve not used Prolog since). But also some professors will try the new language for each assignment approach, which is retarded, as there isn’t enough time or depth to master anything, and so the whole assignment becomes about learning the minimum information needed to get it done. The net net is that there is rarely a coherent plan to get you programming and then to have you learn a wide range of practical languages. In said plan, you might start learning with an easier interpreted language like Python, then be taught to master four or five others that are both practical and varied (say C/C++, Java, Javascript, at least one assembly, a “fancy” or two like Ruby/LISP/Scheme/Prolog/Smalltalk etc.) That doesn’t usually happen. You might get lots of Java and a smattering of 10 others.

College professors also don’t usually think that classes that directly and specifically teach programming languages and practical programming are very cool. There is no research or terribly theoretical aspect to them. I.e. the subject isn’t very academic. They are rarely themselves very good programmers (if they were, they’d be off working for Google or whatnot 🙂 but seriously the personality type for “programmer” and “professor” are different — albeit both bookish). This leads to professors rarely adding this kind of class to the curriculum unless someone makes them.

_

Having heard about all these more practical Gaming majors that colleges now have, but which I know nothing about (they didn’t exist 20 years ago), I asked a friend of mine who just finished her CS degree yesterday! Lauren is a fellow blogger, programmer, WOW fan, and budding game designer-programmer. Big congratulations! Her comments:

Having just completed my degree yesterday, I can confirm that not as much has changed in Computer Science education as one might expect, especially given the exponential growth of the field. Aside from the specific languages taught, which for me was mainly Java instead of Pascal, the curriculum is much the same. The breadth of languages taught is still very much dependent on what you choose to seek out yourself; were it not for honors opportunities or research, I never would have become as familiar as I am with functional programming or the MVC architecture.

After the first two years, programming takes a back seat to theory; upper division classes, while useful and offering a degree of specialization, can be light on actual coding. There are still opportunities to improve your skills, though. Project classes, at least at my school, offer a chance to really show your programming chops, so to speak; with the exception of one I personally considered, all required the completion of extensive coding projects in ten weeks or less to the exclusion of lecture material.

The biggest factor that affected the quality and extent of the education I received was the professors. Sometimes, you will get a truly horrible lecturer, someone who isn’t fair or just doesn’t care. For me, this happened more often than not. The best advice I can give is: Be able to teach yourself. To be honest, I didn’t bother attending classes where the professor was incapable of teaching — I don’t want to waste my time. I went home and read the textbook, or taught myself using tutorials or information online.

“Bad” classes will happen, and the most important thing I learned in college, or even before, is that you need to take active control over your education. Even if the teacher sucks, you can’t blame a failing grade on him; you have the power to learn the material and should do so to the best of your ability. This isn’t to say that poor professor performance doesn’t raise my hackles (it does, a lot), just that self-directed learning is a necessity for succeeding as a student and a programmer, especially since the number of future employers that will accept “The teacher sucked!” as an excuse for a failing grade must be pretty small.

Even if you’re taking the so-called “structured” or “formal” education path, no one will hold your hand. You need to look out for yourself, and find opportunities to broaden your knowledge. I learned firsthand that often these opportunities will not be supplied to you, or even pointed out. You need to be responsible for your own education, especially at large universities. Self-directed study and college are not mutually exclusive.

In that spirit, in addition to my CS degree, I also took a Concentration in Game Culture and Design. This was an interdisciplinary program in conjunction with the art school which, did add a nice game “focus” to my studies. I think these types of programs can be helpful, though to say this improved my coding skills would be more than a stretch. Mostly, it gave me a bit more insight into the game pipeline, and the scale of the work that goes into making a game. I’ve gained some skills which I otherwise wouldn’t have been exposed to; for instance, I’m now comfortable finding my way around game design docs and I’ve had practice giving pitches.

While not a value traditionally espoused as part of a CS education, some gaming or art courses can help your creativity. I can’t speak for the more technical games programs out there, I think there is merit in learning a bit about the industry even prior to leaving school.

This fresher opinion confirmed my belief that no school can be as rigorous as GOOD self training like I gave myself, and under no circumstances should you want until you’re 18 (unless you already are!).
The basic message: Start as early as you can, preferable at age 8-12.

Given that college is roughly age 18-22, and adds a lot of value an education begun at home, it can actually dovetail perfectly with said self education. This will be the topic of a later post in this series.

CONTINUED HERE with The Method!

_

Parts of this series are: [Why, The Specs, Getting Started, School, Method]

Read more from guest blogger Lauren here.

If you liked this post, follow me at:

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or win Crash & Jak giveaways!

Latest hot post: War Stories: Crash Bandicoot

Related posts:

  1. So you want to be a video game programmer? – part 2 – Specs
  2. So you want to be a video game programmer? – part 3 – Getting Started
  3. So you want to be a video game programmer? – part 1 – Why
  4. Making Crash Bandicoot – GOOL – part 9
  5. Crash Bandicoot – Teaching an Old Dog New Bits – part 2
By: agavin
Comments (36)
Posted in: Games, Technology
Tagged as: Algorithm, Andy Gavin, Artificial intelligence, Colleges and Universities, Computer architecture, Computer Programming, Computer science, Crash Bandicoot, Data structure, Doctor of Philosophy, Education, Haverford College, Machine learning, Programming, pt_career_advice, Student, Teacher, Theoretical, Video Game Programming

So you want to be a video game programmer? – part 3 – Getting Started

Aug30

…CONTINUED from PART 2. Or start at Part 1.

Some kid is always asking me, “I love video games, how do I learn to program them?”

First of all, a warning. Reaching the skill level to be a professional video games programmer takes years. There are no shortcuts. You can not possibly go from nothing to professional grade skills in less than perhaps 2-3 years — and for that you’d have to be an uber-genius — usually it takes 5-10.

The good news is that you can start very young (8-10 — I started at 10) and you can do it on your own with common equipment and readily available information.

There are two basic approaches: home training and school. And while I personally recommend both, I’m going to use this post to give my own “origin story.” In followups we can apply these lessons to the present (programming itself hasn’t changed all that much in 30 years — there are just more libraries).

[ BTW, if you’re new to the blog and wondering who the hell I am in this context, click ]

Rewind to 1979. Some of my favorite things in the world were Dungeons and Dragons and arcade games. I was really too young to actually play D&D accurately, but I loved reading the books and modules (besides my regular diet of fantasy novels). I went to the Apple Store (not actually owned by Apple or nearly as glamourous as they are today — in fact, the owner resembled Gandalf) and saw the game Akalabeth running on an Apple II (not a + or an e, but an old school II). Boy did that set me to dreaming!

Then in 1980 my science teacher brought into class a Heathkit H8 her husband built (yes built). This early computer ran a lousy version of BASIC and possesed the world’s worst storage device: the audio tape drive. Actually punch cards were worse, but with the tape drive, saving your program bordered on impossible (at least for the sharing audio tapes with the rest of the class) and so you had to type it in repeatedly. We were given a single mimeographed sheet of paper with the BASIC commands. I read this a couple times and then wrote out longhand the first draft of a text-based RPG where you wandered around and fought orcs and trolls for gold and tretchure (this is how I spelled treasure at 10). During lunch I typed in and debugged the game, editing my paper copy as needed. I used my friends as beta-testers. It may seem overly ambitious to try and recreate D&D as one’s first program, but it illustrates the programmer principle of: program what you love.

Then my best friend got himself a brand new Apple II+ (just released). This was a slick update of the Apple II. It had a whole 48k, came with BASIC, and was often (but not always) accompanied by a 143k floppy disk drive! Low low price of $900 just for the floppy drive! In any case, the II+ was so much more awesome than the Heathkit. It even had graphics!

So I began pestering my father for an Apple. This took 9-10 months of continuous harassment — the machine was expensive — and all sorts of creative techniques to convince him. I offered to mow the lawn for free. I explained how various accounting software would make balancing his checkbook a breeze, etc. Once I was victorious (Jan 1981) we got the accounting software, but he never used it, leaving me to my own devices on the machine. And I think I kept getting paid for the lawn. Still, this episode illustrates another important programmer principle: persistence.

After the Apple arrived, I spent nearly all of my free time (perhaps 6-8 hours a day) on the thing for years. This is essential. You must offer up blood onto the alter of the programming gods. Principle: sacrifice. I used this time in many ways. I played a lot of games. I used every piece of software. I taught myself to program. I hacked. Principle: market research. But I couldn’t afford as many games as I wanted and in those early years the available library was small, so I was always trying to make my own.

I wrote totally lame versions of nearly every arcade game ever made. In BASIC at first (we’ll get to the issue of environment later). I would generally spend a day or three banging these out until they were marginally playable and then move on to new projects. Lesson here: practice. I chose more and more ambitious games and would use each one to teach me something new. I did this in incremental steps, mostly 1-2 day projects. By way of example, I might upgrade something or I might add a load/save system (requiring learning about I/O). My early games didn’t have much in the way of collision, later ones did. I started with text, then moved up to lores graphics, then highres, then shape tables, then bits of assembly language subroutines for blitting. Principle here: baby steps.

Baby steps are incredibly important. You can’t learn everything there is to know in computers in one shot. Each little area takes multiple projects and days — at least — to learn and master. Take file I/O. I’m sure I got something up and going the first day or two back in the early 80s when I decided to add a load/save system, but I was still learning about file I/O 25 years later on Jak 3 (of course then I was inventing new ways of doing stream I/O, but it was learning nonetheless). Your first pass might work, but often you barely understand any of the principles involved.

You have to start simple, build up blocks, and go from there. That’s why interpreted languages and text programs are a good way to begin. You need to learn about variables, scope, and flow of control before you can jump into 3D graphics. And forget about complex unforgiving environments like C/C++ or assembly to begin with. Those come later and are just one more thing to spend a series of baby steps on. Just learning about makefiles or projects and compile options could stop a novice dead. So don’t — yet. Each task (and thing to learn) should be broken into some chunk that only takes a couple days at most to digest — or at least make some headway on. This leads to a virtuous feedback loop of progress and learning.

I kept writing those lame little games for about 3 years (100s of them). Of all my friends with computers (we all programmed in that era because computers didn’t do much if you didn’t program) my games were the coolest. I used them to invent all sorts of excuses to develop new skills. I wanted to learn about interpreters so I made an engine to allow the creation of text adventure games using a custom scripting language. Once I got this going I upgraded it to graphic adventures, which proved to be a perfect excuse to implement an idea I had seen in the Sierra games where line drawing and fill commands were used to compress images to a fraction of their raw size. On the Apple II a raw graphics screen was 8k. So a floppy only fit 17. A normal compressor (ancestor of zip) might squeeze this to 3-4k but that is still only 30-35 images. This “save the drawing commands” style made them a fraction of that. But for it to work I not only had to create the “renderer” (including an assembly fill routine) but I also a whole “paint program” to allow the recording/creation of these proprietary images.

However, each of these sub-steps resulted in satisfying progress on its own. Principle: chunking. For example that fill routine. It took several days, and my mastery of recursion in assembly wasn’t the best so it left little corners unfilled, but it was cool in of itself. My first fill routine (in BASIC) took 5 minutes to do a fill, and the assembly one only a second or two. Plus, I was to keep using it in all sorts of programs for years (with improvements). Principle: reuse. Building on the tools you make is essential to programming.

In 1982, I met Jason Rubin. He also programmed. He was an amazing (by the standards of the time and our age) artist and his games LOOKED REALLY COOL. But they crashed a lot. Mine rarely did. From the beginning I hated crashing. Still can’t tolerate it. I have trouble leaving the keyboard if a crash bug is still outstanding. Principle: perfectionism. My programs also did much cooler “programming” stuff. They just didn’t look cool. When we combined our talents, things really took off! Our games now looked cool AND ran decently. Impressive stuff. Lesson: partnership. Not everyone can be good at every aspect of computers. Nor even of programming itself.

CONTINUED with Part 4 – School!

_

Parts of this series are: [Why, The Specs, Getting Started, School, Method]

If you liked this post, follow me at:

My novels: The Darkening Dream and Untimed
or the
video game post depot
or win Crash & Jak giveaways!

Latest hot post: War Stories: Crash Bandicoot

Related posts:

  1. So you want to be a video game programmer? – part 2 – Specs
  2. So you want to be a video game programmer? – part 1 – Why
  3. How do I get a job designing video games?
  4. Matsuhisa – Where it all started
  5. Making Crash Bandicoot – GOOL – part 9
By: agavin
Comments (27)
Posted in: Games, Technology
Tagged as: Andy Gavin, Apple, Apple II, Apple II series, Apple Store, BASIC, Computer Programming, Dungeons & Dragons, Floppy disk, Game programming, Heathkit, Origins, Programming, pt_career_advice, Steve Jobs
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