Prologue
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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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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 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!!!


Prologue

ConMan

A Visual Programming Language

for

Interactive Graphics

Paul E. Haeberli , Silicon Graphics, Inc.

A presentation by Ajay Jampani


Prologue

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


Introduction

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


Example

Example

  • Separate interaction frame per component

  • Extending: Connect interaction frames of the applications

  • Connection as easy as directing I/p and o/p s


Mechanics

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 Πeffective applications!

ConMan: Basically a user ‘process’ running under window mgr

Message Passing used to communicate


Why visual programming

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


An example avs

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


Features

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;


Sample avs screenshots

Sample AVS screenshots


Advantages

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


Disadvantages

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


Hci metrics

HCI Metrics

  • User Retention:  

  • Learning Curve: 

  • User Satisfaction: 

  • User Performance:  

  • Error Recovery:  


Questions comments

QUESTIONS? COMMENTS??

Call Toll Free 1-800-CALLAJAY


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