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      Jason Doucette / Xona Games
       
      hometown – Yarmouth, NS, Canada
      residence – Seattle, WA, USA
      university – Acadia University
      college – COGS
      contact – (other methods)
          social networks
          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 The initial problem is to tweak the registers in an unpublished, non-standard way to achieve these modes.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.

       
      86,414 visitors since May 13th, 1999
      2,041,750 total page views since May 13th, 1999
      Jason Allen Doucette / Xona Games
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