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Maths of 3D Graphics

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  • 17-04-2003 8:47am
    #1
    Syth
    Registered Users Posts: 1,865 ✭✭✭


    I'm wondering does anybody know any sites are anything that would explain how to programme 3D graphics? I'm interested in how to make 3D graphics from the ground up, the bare bones of 3D graphics.
    For example, if I have a way to store the co-ordinates of a 3D shape, how can I project it onto the 2D surface of the screen. How do I rotate that shape? How do I hide things that are behind other things?
    Can anyone help?


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    #2
    satchmo
    Registered Users Posts: 1,481 ✭✭✭satchmo


    have a look at the text files at programmersheaven.com, there a couple of good tutorials there on what you're looking for - try the ones that have been rated before the others. Also have a look at the gamedev.net 'Articles & Resources' there's some good stuff there. Basically learn everything you can about vectors & matrices, and take it from there...


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    #3
    Enygma
    Closed Accounts Posts: 1,651 ✭✭✭Enygma


    The stuff at http://nehe.gamedev.net is GOLD.

    Not that I'm great at this stuff but I was able to follow those tutorials.


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    #4
    satchmo
    Registered Users Posts: 1,481 ✭✭✭satchmo


    NeHe has some really great tutorials alright, but they don't really cover much 3d theory, which is what you're after from the sound of it. Actually, if you have access to a college library then it should have 'Interactive Computer Graphics: A top-down approach with OpenGL' by Edward Angel - a great book which covers both pure 3d theory as well as OpenGL, and does both very well to boot.


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    #5
    Magic Monkey
    Registered Users Posts: 1,068 ✭✭✭Magic Monkey


    Redbook - OpenGL Bible


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    #6
    phaxx
    Registered Users Posts: 1,842 ✭✭✭phaxx


    http://www.virtually.at/hugi/

    The diskmag Hugi has articles covering a lot of things about graphics, beginner OpenGL tutorials and so on.


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    #7
    sobriquet
    Closed Accounts Posts: 413 ✭✭sobriquet


    There are only a few areas of math that are necessary for basic 3D graphics. Vectors, Matrices, Linear Transformations (and Transformations with Matrices), and Projections. After that it's algorithms and data structures you'll need, like Z-Sorting for ascertaining what's in front of and behind a given vertex, etc.

    I found this very helpful for almost all the above (the maths anyway) when I started out: 3DMath.txt. Then get a hold of some decent code to hack, to see how it works, maybe like this Cube. (It's in Java, btw.)

    If I were you, I'd leave 3D alone for a wee while, and get some 2D graphics working first. Do a rotating square, then extrude into 3d.

    Have fun.

    Chris.


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