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SI23Introduction to Computer

Graphics

SI23Introduction to Computer

Graphics

School of ComputingKen Brodlie

Semester 2 2002-2003

Lecture 1 - Introduction

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Course ObjectivesCourse Objectives

On completion of this module, students should be able to:

Appreciate applications and benefits of computer graphics

Understand an overall architecture for computer graphics systems

Create interactive graphics applications

Understand the basic principles of image display, animation and colour

Understand the role of graphics within web technologies

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Why should we study Graphics?

Why should we study Graphics?

Many of the leading scientists through the ages have been ‘visual thinkers’…

– Leonardo da Vinci– Einstein– Clerk Maxwell– Faraday

… often at the expense of verbal skills

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Napoleon’s ArmyNapoleon’s Army

Minard’s classical visualization – 1869

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English Translation!English Translation!

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London Underground MapLondon Underground Map

LondonUndergroundMap of Harry Beck (1933)

www.thetube.com

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Want to know more?Want to know more?

Excellent web site on classical visualizations:– Michael Friendly, University of York,

Toronto– http://www.math.yorku.ca/SCS/

Gallery/ historical.html

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Course OutlineCourse Outline

Course overview and some applications

Image creation, manipulation and display

Colour

URLGIMP

colour

ImageDisplay

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Course OutlineCourse Outline

ImageDisplay

URLGIMP

colour

Vector graphics– Line drawing– Area filling

Graphical interaction

SVGViewer

2D vectorgraphics

URLlines.,areas

graphicsalgorithms

interaction

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Course OutlineCourse Outline

ImageDisplay

URLGIMP

colour

2D vectorgraphics

URL SVGViewer

lines,areas

graphicsalgorithms

interaction

3D graphics– Modelling– Rendering

(viewing and shading)

VRMLviewer

viewing, shading

3DGraphics

URL

surfaces

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Course OutlineCourse Outline

ImageDisplay

URLGIMP

colour

2D vectorgraphics

URL SVGViewer

lines,areas

graphicsalgorithms

interaction

VRMLviewer

3DGraphics

URL

surfaces

viewing, shading

GraphicsProgramming

OpenGLAPI

animation

Graphics programming

– Using OpenGL with C, C++

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The ToolsThe Tools

GIMP– Image creation,

manipulation and display

– Available on SoC linux

– Versions for linux and windows

– www.gimp.org

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The ToolsThe Tools SVG

– Scalable Vector Graphics

– 2D schematic graphics

– Batik viewer on linux

– Adobe plug-in for Windows

Try this

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The ToolsThe Tools

VRML– 3D Web graphics– Vrmlview on linux– Cortona plug-in

on Windows

Try this

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The ToolsThe Tools

OpenGL– Graphics

programming API– www.opengl.org

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ApplicationsApplications

Molecular chemistry

The sugar binding site in the LT-I toxin. This figure was created by feeding the output of Per Kraulis' program Molscript into the Raster3D rendering program.

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ApplicationsApplications

Computer Aided Design

Octagon graphics

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Applications - MeteorologyApplications - Meteorology

Pressure at levelsin atmosphere- illustrated by contour lines in aslice plane

Generated bythe Vis5D systemfrom University ofWisconsin (nowVis5d+) http://www.ssec.wisc.edu/~billh/vis5d.html

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Applications - MedicineApplications - Medicine

From scanner data, we canvisualize 3D picturesof human anatomy, usingvolume rendering

Generated by VOXELmansoftware from Universityof Hamburg

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Applications - Environmental Sciences

Applications - Environmental Sciences

Effect of global warmingover period of years

Generated by NCAR

http://www.scd.ucar.edu/vg/ResearchGallery.html

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Applications - EntertainmentApplications - Entertainment

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Outline of the CourseOutline of the Course

Lectures– Thursday 10 (LT20) ; Friday 1 (LT21)

Assessment– Examination (50%)– Coursework (50%)

» Creating images with GIMP» Creating 2D vector graphics with SVG» Creating a graphics application with OpenGL

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Keeping in TouchKeeping in Touch

E-mail– kwb@comp.leeds.ac.uk

Newsgroup for my postings:– local.modules.si23

Newsgroup for your postings:– local.modules.si23.talk

World Wide Web– http://www.csdb.leeds.ac.uk/si23/