3D Engine II

April 21, 2023 1computer graphics -dpi

In this presentation

What is a 3D Engine?Well –known 3D Engine.An introduction to OpenGL Comparing 3D Engines.

April 21, 2023 2computer graphics -dpi

What is a 3D Engine?

A 3d engine is a whole of structures,

functions and algorithms used to

visualize, after many calculations and

transformations, 3d objects on a 2d

screen.

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The main sections of a 3d engine are :

1-The acquisition of the object‘s data in structures.

2-The transformations to position the objects in the world. (modeling and viewing transformations)

3-Rendering the scene on the 2d screen .

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BACK FACE CULLING

PROJECTION TRANSFORMATION

VIEWPORT TRANSFORMATION (OpenGL has

two main buffers)

The COLOR BUFFER (that can be single or double)

The DEPTH BUFFER.

Rendering the scene on the 2d screen

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Modeling of 3D image

PERSPECTIVELIGHTINGDEPTH OF FIELDANTI-ALIASINGFADEDBUMP MAPPINGREFLECTION MAPPINGBLUR MOTION

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Other well- known 3D engines

Open GLDirect 3DBlenderOgre 3dSpace crystalLuxolgy modoMaxon cinemaNewtek lighwaveSoftimage XSI foundation

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OpenGL

OpenGL is a library that lets us interface with the graphics hardware

It has a series of functions to draw points, lines and polygons, and it carries out all the calculations necessary for the illumination, shading and transformation of the vertices

It allows us to create a window independent of the platform used (Windows or Linux)

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OpenGL

The OpenGL Architecture Review Board (ARB), was an independent consortium formed in 1992

ARB-approved OpenGL specifications and source code are available to licensed hardware platform vendors. End users, independent software vendors, and others writing code based on the OpenGL API are free from licensing requirements

High Visual Quality and PerformanceApril 21, 2023 9computer graphics -dpi

OpenGL

Developer-Driven Advantages Industry standardStableReliable and portableEvolvingScalableEasy to useWell-documented

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OpenGL

Available EverywhereArchitected for Flexibility and Differentiation:

Extensions

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OpenGL

The structure of OpenGL program is divided into different sections: Init function: used to boot OpenGL and to init the

modeling, viewing and projection matrices Resize function: called every time the user starts the

program or changes the output-window resolution Keyboard function: called every time the user presses

a key Drawing function: clears all the buffers (color and

depth). Main Cycle: an infinite loop, which calls all our

functions every frame

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Comparing Auto desk3ds

max 9

Auto deskMaya

complete 8.5

Blender 3D 2.45

LuxolgyModo 301

MaxonCinema4

DR 10.1

NewtekLightwave 9.3

Softimage XSI

Foundation 6.2

Annual subscription

YesYesNoneNoneNoneNoneNone

PlatformsWinWin-linuxWin-linuxWinWinWinWin-linux

TrialYesYesNoYesYesYesYes

Languages

FR EN

ENA lots but EN isbest

EN JPCZ EN FR GE IT

PL SP JP

EN JPEN JP

InterfaceCAD style, Cleanand

powerful

flexible andpowerful,

butnot

intuitive!

Fastworkflow,

can bemore

intuitive

Excellent! Clean andintuitive

A bit old, texts

interface.

Logical texts

and cleaninterface!

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ComparingAuto desk3ds

max 9

Auto desk

Mayacomplet

e 8.5

Blender 3D 2.45

LuxolgyModo

301

MaxonCinema4

DR 10.1

NewtekLightwa

ve 9.3

Softimage XSI

Foundation 6.2

Technologies

Core

OldOldOld / Re-new

ModernOld / Re-new

Old / Re-new

Modern

Company support for

single users

Low / Good

GoodCommunities

Very good

Very good

Very good

Very good

Documentations

GoodExcellent

GoodVery good

Very good

Excellent

Very good

April 21, 2023 14computer graphics -dpi

ComparingAuto desk3ds

max 9

Auto deskMaya

complete 8.5

Blender 3D 2.45

LuxolgyModo 301

MaxonCinema

4DR 10.1

NewtekLightwave 9.3

Softimage XSIFoundation 6.2

Rendering

Internal,Mental

Ray

Internal,Mental

Ray

Internal

InternalInternalInternalMentalray

QualityExcellent

Excellent

GoodExcellent

Excellent

GoodExcellent

Modeling

Excellent

Very good

GoodVery good

Very good

Excellent

Excellent

Modifiers

Excellent

Very good

GoodVery good

GoodGoodVery good

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