firework studio

Firework Studio

Computer ScienceFinal Year Project 2002/2003

Project Team ( BR1 ):

Chan Wai Wa ( Raymond )Cheng Fun Hop ( Brian )Ng Yat Wah ( Fat )

Advisor :

Dr. Michael S. Brown

Overview of Presentation

• Introduction• Design & Implementation• Results• Conclusion• Q&A

Introduction• Project background

• Originated in ancient China• Joy & happiness in celebrations

events

• Motivation• Commercial

• Design & testing efficiently

• Firework enthusiasts• Free creation

and design• Safe and legal

(in HK)

Introduction

• Description• Software for designing fireworks/

fireworks shows

• Challenges• Realistic results• Real time performance• Easy to use• Diversified design

• Architectural Overview • Design Pattern

• Model-View-Controller (MVC)− Advantage: Clarity of design, ease to growth...

System Design

Model

Controller

View

Model

Controller

View

• Components• Simulator• Viewer• Composer• Sound System

Composer

Viewer

Simulator

Sound System

Components• Simulator

• Core part • Based on Particle System• contains all calculations

• Viewer• For showing simulation

• Composer• Graphical User-Interface (GUI)

• Sound System• API for generating sound • Eg: explosion sound effect , background

music

By Newton’s 2nd law : F = ma i.e.a = F/mv(tn) = a(tn) + v(tn-1)x(tn) =v(tn) + x(tn-1)

xvf

positionvelocity

Force accumulator

Particle System

t1

t 2

t3 t4

External fo

rce

t5

t1

t 2

t3 t4

External fo

rce

t5

t1 – t4 : f1=f2=f3=t4=Gravitational force -> the velocity changes

t5 : Collision –> f5 = f4 + external forcef : for update position & velocityModified Particle SystemAssumption : No collision among firework particlesForce acting on particles : Gravitational force ONLY By Newton’s 2nd law : F = ma i.e.

a(t) = F(t)/m = constant = a

v(tn) = a + v(tn-1)v(tn) = a + v(tn-1) = a + ( a +v(tn-2) )v(tn) = a + v(tn-1) = a + ( a +v(tn-2) ) = ... = atn + v(t0)v(tn) = atn + v0 where v0 is initial velcoity

x(tn) =atn2/2 + v0tn + x(t0)

Initial position

Initial velocity v0

x0

x(tn) =atn2/2 + v0tn + x0where x0 is initial position

Constant

Advantages : •System can be updated at any timer value

preview firework at any timer value

Data structure

Design time Run time

Scene

Firework

Firework template

Emit action

Particle template

Scene

Particle Group

Particle

Explosion

- Create particles

- Make differences for a firework design

• Explosion types example

Firework Trails

Implementation

• Simulator (simulation engine)• VC++

• Viewer• OpenGL SDK

• Composer (GUI)• OpenGL User Interface (GLUI)

• Sound System • OpenAL

PerformanceConfiguration

Computer A Computer B Computer C Computer D Computer E

CPU Pentium 4 2.26 GHz

Pentium 3 1 GHz

Intel Celeron600 MHz

Pentium 3 733 MHz

Pentium 3 667 MHz

Memory 512 MB Ram 256 MB Ram 256 MB Ram 512 MB Ram 256 MB Ram

Video Card NVIDIA Geforce 2 MX/MX

400

Intel(r) 82815 Graphics

Controller

NVIDIA Geforce 2 MX/MX

400

On board S3 Graphic

Inc. ProSavage

S3 Graphic Inc.

Savage4

FPS result of different scene on each computer

A B C D E

A empty scene 86 9 60 6 5

A complex scene (texture disabled) 47 6 17 5 3

A complex scene (texture enabled) 20 3 5 2 2

A normal scene (texture disabled) 60 8 42 6 3

A normal scene (texture enabled) 39 5 28 5 3

Conclusion• Summary

• Realistic simulation • Easy to use• Real time result

• Possible Future Extensions • Ranged parameters• Movie export• Customization

Demonstration