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Prologue

Prologue. A: Hola! Want to know about ‘ConMan’, the new interactive tool?? B: Thanks , I had enough of this already. I came across enough cool ones in Dr. North’s class! A: Not the traditional , cumbersome, hard to manage, limited usage ones that can’t encapsulate all possible cases.

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Prologue

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  1. Prologue A:Hola! Want to know about ‘ConMan’, the new interactive tool?? B:Thanks, I had enough of this already. I came across enough cool ones in Dr. North’s class! A:Not the traditional, cumbersome, hard to manage, limited usageones that can’tencapsulateall possible cases. B:Stop it! I love Dr.North. A: I thought you were interested in a more dynamic, user- initiated, flexile interface… B: Hmmph, you WIN!!!

  2. ConMan A Visual Programming Language for Interactive Graphics Paul E. Haeberli , Silicon Graphics, Inc. A presentation by Ajay Jampani

  3. Motivation: why yet one morevis tool?? • Static user-interface reflects developer's vision • Non-user friendly at times • Users match a given toolkit to a particular task. • E.g. UNIX pipe: ls || pg, an IPC • Synergy: 2+2=5 rule in Sys Anal & Des • Same rule extended to visual tools. • User can use combinations to solve problems that the designers didn't envision

  4. Introduction ConMan?? Huh? CONnection MANager:A High-level Visual Language (run on IRIS) A Graphical facility for connecting visually-oriented tools KEY: Disintegration into modular components, (a)   Combined selectively depending on desired function Flexible, easy to develop (b)  Users dynamically build, modify graphical applications Encourages exploration, acts as “pseudo-developer” (c)Uses a Data Flow Metaphor

  5. Example • Separate interaction frame per component • Extending: Connect interaction frames of the applications • Connection as easy as directing I/p and o/p s

  6. Mechanics Basic unit: Component ( with code written in C lang.) (a) Developer concentrates more on a single unit More efficient! (b) They can be combined to give better results Better component Œ effective applications! ConMan: Basically a user ‘process’ running under window mgr Message Passing used to communicate

  7. Why Visual Programming? Visual Programming • Describes any sys that lets user specify a prog using a 2D notation (representation) • Easy to use and manipulate • User has more freedom • Effective Tailor made applications in less time • Easy to undo/redo, effects rendered instantly

  8. An Example- AVS Why AVS (Advanced Visualization System)?  Tools like AVS use a visual programming approach based on Haeberli's ConMan, enabling people to link together various components to build powerful scientific / technical visual applications without going through the process of learning Some practical uses:  Facilitates analysis and treatment of prostate cancer; can simulate placement of seeds within the patient's anatomy and vis results  Data processing and Vis Networks etc

  9. Features Features: Provides traditional plots and graphs, 3D interactive rendering and volume visualization, simple interfaces Wide usage: Most Common application areas, wide range of functions supported (simple SQL to very complex db ops) Interoperability: Huge repository of user-contributed modules, various formats, Cross-pf visualization, Application deployment with no recompiling and no changes to app code;

  10. Sample AVS screenshots

  11. Advantages • Wraps most frequently used vis techniques in intuitive, easy-to-learn "viewers"   • Explore data immediately: no programming experience • Scales to very large data and very complex systems 0.5m modules/application Yet easy: Visual programming environment • Visual environment reduces error rate on user’s part • More interactive and modular applications

  12. Disadvantages • Assumes user can handle tools provided to him effectively Inherent weaknesses of user reflected in his work • Difficult to build large scalable systems •  But again, such tradeoff (Expressive Vs. Ready-made) benefits only some users, while others are left unsatisfied

  13. HCI Metrics • User Retention:   • Learning Curve:  • User Satisfaction:  • User Performance:   • Error Recovery:  

  14. QUESTIONS? COMMENTS?? Call Toll Free 1-800-CALLAJAY

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