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                    Jason Doucette / Xona Games
                     
                    hometown – Yarmouth, NS, Canada
                    residence – Seattle, WA, USA
                    university – Acadia University
                    college – COGS
                    contact – (other methods)
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                        tech – Project/Games · Graphics Tech · Artificial Intelligence · World Records/Number Theory
                    personal – Home · Resume · Transcripts · Contact
                    twin – Matthew Doucette of Xona Games
                    old – Petzold's Programming Windows 5th ed Errata · Domain Hacks · Wallpapers



                    Computer Graphics

                    Back to Main Resume Page

                    The following graphic samples are all software, programmed in MS-DOS. They all run real-time, even on a 486/66Mhz class machine (on which most of these were programmed). Each real time computer graphic engine is similar to those required for interactive video games and simulation software. None of the following effects are created via 3D graphic accelerators. Each of these effects is 100% responsible for the display of every individual pixel, manually computed by CPU directly from my software. Also, none of the programs use a graphics API (such as DirectX or OpenGL) which would perform most of the calculations for you. Any 3D program uses the basic 3D formula for converting a 3D point into a 2D screen position which I developed myself in grade VIII without the aid of textbooks or any other graphic / art sources. All the effects included tweaked VGA modes, hi-color modes, and other video card tricks are 100% software.

                    All code is original and self-taught. Pictures are shrunk down from the actual screen shots. All effects, including hi-color effects, run under standard VGA. Some run under any non-standard Mode-X resolution (up to 360x480, 376x564, and 640x400).

                    It should be noted that standard VGA does not have a hi-color mode. In its standard mode 13h, the screen has a resolution of 320x200. The pixels have an anisotropic ratio of 6:5. It has a maximum of 256 colors on the screen at any given time. It only has one frame buffer, which implies a 64,000-byte memory copy from a virtual screen buffer for each frame.

                    In the non-standard Mode-X modes, there are several screen resolutions available. The initial problem is to tweak the registers in an unpublished, non-standard way to achieve these modes. They also have a 256 color limit. Their pixel aspect ratios vary with the modes (320x240 has perfectly square pixels, where as most of the other resolutions do not). If the screen buffer is sufficiently small (131,072 bytes or less), Mode-X offers more than a single screen buffer. However, unlike mode 13h, is it non-linear. It exists in four planes, in which each plane accesses one fourth of the screen. Each plane skips three intermediate screen pixels, making it very difficult for drawing procedures - even for a virtual screen buffer copy, which is necessary for modes with only one screen buffer.

                    The knowledge and wisdom gained from my extensive experience in programming these software engines can be used for the implementation of such engines in the current release of 2D systems, such as PDA devices and the Game Boy Advance (GBA). If you have an interest in any of my technologies, please contact me at .

                    WIRE MESH
                    Wire Mesh 3D Glasses
                    Wire Frame Space Shuttle Wire Frame 3D Glasses
                    Download 3dglasses.zip (56KB)
                    Anti-Aliased Lines
                    Anti-Aliased Lines
                    Download antialiasing.zip (20KB)


                    POLYGON
                    Polygon Tunnel
                    Polygon Tunnel
                    Download polygontunnel.zip (14KB)
                    Light-Source w/ Shadow 3D Parameterization
                    Light-Source Polygon Shadow
                    Download lightsourceshadow.zip (17KB)
                    3D Parameterization
                    Download 3dparameterization.zip (297KB)


                    TEXTURE MAPPING
                    Texture Mapping Texture Mapping
                    w/ Color Quantized Fade
                    Texture Mapping
                    Download texturemapping.zip (23KB)
                    Texture Mapping w/ Color Quantized Fade
                    Download texturemappingfade.zip (79KB)
                    Texture Mapped Tunnel Rotation, Scaling, Mip-Mapping
                    Texture Mapped Tunnel
                    Download texturedtunnel.zip (24KB)
                    Rotation/Scaling/Mip-mapping
                    Download rotation.zip (396KB)


                    GOURAUD, PERSPECTIVE, PHONG
                    Gouraud Shading
                    Gouraud Shading Gouraud Shading
                    Download gouraudshading.zip (62KB)
                    Environment Mapping Phong Shading
                    Environment Mapping

                    Environment Mapping

                    Environment Mapping
                    Download environmentmapping.zip (127KB)
                    Phong Shading

                    Phong Shading

                    Phong Shading
                    Download phongshading.zip (46KB)
                    Gouraud Texture Perspective Texture
                    Gouraud Texture Perspective Texture
                    Download perspectivetexture.zip (44KB)


                    BLUR MOTION
                    Polygon Blur Gouraud Texture Blur
                    Polygon Blur Gouraud Texture Blur
                    Download gouraudtextureblur.zip (254KB)


                    PHYSICS SIMULATIONS
                    Spring Theory Gravity Simulation
                    Spring Theory
                    Spring Theory
                    (on my Projects/Games page)
                    Gravity Simulation
                    Gravity Simulation
                    (on my Projects/Games page)
                    Anit-Gravity Arkanoid Physics
                    Anti-Gravity Simulation
                    Anti-Gravity Simulation
                    (on my Projects/Games page)
                    Arkanoid Physics Engine
                    Arkanoid '97
                    (on my Projects/Games page)
                    Road Simulation
                    Road Simulation
                    Road Engine for Full Tilt
                    (on my Projects/Games page)


                    MISCELLANEOUS
                    Voxel Terrain Technology (Height Mapped Engine)
                    Photo-Realistic Height Mapped Terrain
                    Voxel Terrain Engine
                    (on my Projects/Games page)
                    Bump Mapped Shading Vector Balls / Compiled Sprites
                    Bump Mapped Shading
                    Download bumpshading3.zip (19KB)
                    Vector Balls
                    Download vectorballs.zip (155KB)
                    Maze Generator / Solver
                    Maze Generation     Maze Solver
                    Download mazegeneration.zip (35KB)


                    DEMO GRAPHIC EFFECTS
                    Spinning Copper Bars Bitmap Plasma Distortion
                    Spinning Copper Bars
                    Download copperbars.zip (18KB)
                    Wavy Bitmap
                    Download bitmapdistortion.zip (73KB)
                    Color Wheel / Fake 12-Bit Color Wave Interference




                    Download 12bitcolor.zip (15KB)
                    Wave Interference
                    Download waveinterference.zip (36KB)
                    Mandelbrot Set 3D Sierpinski Triangle /
                    Sierpinski Gasket
                    Mandelbrot Set
                    Mandelbrot Set Images
                    (on my Wallpapers page)
                    3D Sierpinski Triangle / Sierpinski Gasket
                    Liquid Motion Fire
                    Liquid Motion
                    Download liquidmotion.zip (21KB)
                    Fire
                    Download fire.zip (28KB)

                    Some of these graphic engines have been used in projects I have on display in my Projects/Games page.

                    My brother, Matthew Doucette, also has a page which showcases his talents in Real Time DOS Graphics. He also has a page that displays his Real Time 3Dfx Graphics.

                     
                    86,906 visitors since May 13th, 1999
                    2,057,931 total page views since May 13th, 1999
                    Jason Allen Doucette / Xona Games

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