258|竞彩

                              Jason Doucette / Xona Games
                               
                              hometown – Yarmouth, NS, Canada
                              residence – Seattle, WA, USA
                              university – Acadia University
                              college – COGS
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                                  tech – Project/Games · Graphics Tech · Artificial Intelligence · World Records/Number Theory
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                              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
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                              Jason Allen Doucette / Xona Games

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