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EEL 5771-001 Introduction to Computer Graphics

Explore line drawing algorithms, circle and ellipse raster algorithms, pixel addressing techniques for different shapes, and area fill methods. Learn about OpenGL area fill, vertex arrays, and pixel array primitives. Discover character handling with bitmap and stroke characters.

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EEL 5771-001 Introduction to Computer Graphics

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  1. EEL 5771-001 Introduction to Computer Graphics PPT2: Graphics Output Primitives PPT and video are due : no later than September 13, 5:00 PM Submit to: lpiegl@gmail.com This template file is just an outline of the presentation that you need to complete. Additional pages will be necessary to fully explore the topic above. Each page should contain adequate text as well as illustrations. You are free to use all publicly available information (text as well as graphics) as long as the sources are properly acknowledged.

  2. Team members’ contributions Member [name]: Member [name]: Member [name]: Member [name]:

  3. Coordinate Frames Content outline: • Coordinate frames, screen coordinates • Graphics programing: points and lines

  4. Line Drawing Algorithms Content outline: • Line drawing principles • The math behind a simple line drawing algorithm

  5. Line Drawing Algorithms Content outline: • The digital differential analyzer (DDA) algorithm • The principle and pseudo-code

  6. Line Drawing Algorithms Content outline: • Bresenham’s algorithm • The principle • The math • The pseudo-code • Detailed example

  7. Line Drawing Algorithms Content outline: • Pixel addressing • General addressing, addressing for x/y increment

  8. Line Drawing Algorithms: Order Dependence Content outline: • The problem of order dependence • Possible solutions

  9. Line Drawing Algorithms Content outline: • The problem of clipping • Side and bottom clipping

  10. Line Drawing Algorithms Content outline: • The problem of intensity as the function of the slope • Potential solutions

  11. Circle Algorithms Content outline: • Circle algorithms via polygonal approximation • Circle algorithms via implicit functions

  12. Circle Algorithms Content outline: • Circle raster (integer) algorithms • Extension of Bresenham’s line algorithm • The math • The code • Worked example

  13. Ellipse Algorithms Content outline: • Ellipse raster (integer) algorithms • Extension of Bresenham’s line algorithm • The math • The code • Worked example

  14. Pixel Addressing Content outline: • Pixel addressing for lines • Mathematical vs. raster lines

  15. Pixel Addressing Content outline: • Pixel addressing for rectangles • Graphics convention in rectangle drawing

  16. Pixel Addressing Content outline: • Pixel addressing for circles/ellipses • Graphics convention in circle drawing

  17. Area Fill Methods Content outline: • Concave and convex polygons • Polygon split

  18. Area Fill Methods Content outline: • Area fill with Boolean operation • Data structure for polygonal objects

  19. Plane Equations Content outline: • General implicit form • Three-point form • Fitting to a random data set via the eingen-vector method

  20. OpenGL Area Fill Content outline: • Polygons, triangles, strips • Quads and quad strips

  21. Vertex Arrays Content outline: • Data structure for vertex arrays • Sample code for polygonal objects

  22. Pixel Array Primitives Content outline: • Bitmaps and pixmaps • Storage in hardware

  23. Pixel Array Primitives Content outline: • Bit-shape representations • Code segment for storage and application

  24. Pixel Array Primitives Content outline: • Pixel drawing • Double buffering • Buffers for stereo imaging

  25. Character Handling Content outline: • Bitmap characters • Stroke characters

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