3D visualisation facilities in CEMPS an introduction to R170...Background - some de nitions Facilities 3D visualisation facilities in CEMPS { an introduction to R170 Dr Gavin Tabor

Background - some definitions Facilities

3D visualisation facilities in CEMPS– an introduction to R170

Dr Gavin Tabor & Matt Johns

CEMPS, University of Exeter

Background - some definitions Facilities

Rendering

Process of computationally generating a 2d image from a model

Various methods: largely based on some variant of ray tracing.Surface may be complicated or simple

Result is a 2d image representing the view of the scene from thecamera location.

Background - some definitions Facilities

Examples

Software for rendering from 3d scene : 3DS Max, Blender

Background - some definitions Facilities

Stereoscopic Visualisation

L+R eyes see slightly different views of the same scene – depthperceptionL+R images seen by eyes – illusion of depth

Render (or film) scene from two camera locations – projectdifferent images to each eye.

A number of possible projection techniques :

Anaglyph – different colour images/glasses (red/cyan)

Passive – polarised light

Active – LC shutter glasses

Headsets

Background - some definitions Facilities

Background - some definitions Facilities

R170/R169

Visualisation suite – developed 2008/9 as part of Harrisonrefurbishment :

• 50 seat theatre with stereoscopic (passive polarising)projection system

• Visualisation lab with 3d-screen computers, rendering array

Content generated :

• “Real world” film sequences (hired camera)

• Computer generated from CAD modelling

• Scientific visualisation – directly (ParaView) or indirectly(VRML and 3DS Max)

Background - some definitions Facilities

Examples of use

3d Showreel – developed by Matt Johns (now PhD in CEMPS)

Several 3rd/4th year visualisation projects in Engineering(2011/12)

3D Content Wiki :http://empslocal.ex.ac.uk/3dwiki/Main/Home