DiRT - Dust in Real-Time: The Specification Process

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DiRT - Dust in Real-Time The Specification
Process

• Marcos C. Bagby,
• Ryan A. Romero,
• Brett L. Sulprizio, Hiroko Uda,
• Joseph R. Jaquish, Frederick C. Harris, Jr.

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Introduction

• Overall Goal
• Desert Research Institute
• Immersive Visualization Lab.
• Desert Terrain

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Introduction

• Short Term Goal
• Therefore, we need to simulate/model Dust
• Realistic
• Videos
• Real time simulation might be difficult.

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Introduction

• This project is an ongoing research project that
  could not be completed in 1 semester.
• In Senior Projects the students use a streamlined
  software engineering process to design and
  implement their projects.

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Requirements Specification

• Two Types
• Functional
• Non-Functional

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Requirements Specification

• Functional
• R01 1 DiRT shall use volumetric fog extensions.
• R02 1 DiRT shall simulate dust dissipation.
• R03 1 DiRT simulates wind patterns.
• R04 3 DiRT shall check to see if current
  computer hardware can run the simulation.
• R05 2 DiRT shall display the current frame
  rate.
• R06 1 DiRT shall allow the user to start the
  simulation.
• R07 1 DiRT shall allow the user to stop the
  simulation at any time.
• R08 1 DiRT shall display the methods of dust
  simulation.
• R09 3 DiRT shall allow the user to change the
  terrain.
• R10 1 DiRT shall allow the user to change the
  point of view.
• R11 3 DiRT shall enable the user to customize
  the lighting.

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Requirements Specification

• Functional
• R12 1 DiRT shall support a free form camera.
• R13 1 DiRT shall support a first person pilot
  camera view.
• R14 3 DiRT shall allow the user to load terrain
  maps.
• R15 2 DiRT enables the user to change the
  screen resolution.
• R16 2 DiRT shall enable the user to switch from
  pilot view to free camera perspective.
• R17 1 DiRT shall use the keyboard to control
  vehicle movement.
• R18 1 DiRT shall enable the pilot to fly/drive
  the vehicle.
• R19 2 DiRT shall enable the user to change the
  model used for the vehicle.
• R20 3 DiRT shall enable the user to toggle the
  terrain to on, off, wire-frame, smooth, and
  smooth wire-frame.
• R21 3 DiRT shall enable the user to change the
  speed of the simulation (slow down or speed up).

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Requirements Specification

• Non-Functional
• T01 DiRT will be able to run all dust methods in
  real-time.
• T02 DiRT will ask a user to choose a displaying
  method from the three
• 1. Volumetric fog dust
• 2. Diffuse reflection dust.
• 3. Particle system.
• T03 DiRT shall be implemented with OpenGL and Qt.
• T04 DiRT shall be a cross-platformapplication.
• T05 DiRT shall be written in C.

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Use Case Modeling

• To better understand the functionality of DiRT,
  the system has been divided into use cases.
• This figure presents the interaction of the user
  with DiRT

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Use Case Modeling

• As part of the process the team constructed a use
  case / requirement traceability matrix.
• This partial matrix shows how the use cases and
  requirements interact.

Use Case Use Case Use Case Use Case Use Case Use Case Use Case Use Case
01 02 03 04 05 06 07 08
R06 X
R07 X
R08 X
R09 X
R10 X
R11
R12 X
R13 X
R14 X
R15 X
R16 X
R17 X
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Architectural Design

• The system architecture is divided into various
  subsystems.

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Architectural Design

• The structure of DiRT was done using an object
  oriented approach.
• As such there were several charts and diagrams
  built to clarify the design.
• The first was a class diagram.

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Class Diagram (partial)
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System Activity Chart

• The second was a system activity chart which is
  shown here

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Current Status

• Terrain Input
• video

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Current Status

• A lot of work has continued on this portion
  because of the importance to the whole system
• We have a paper going out tomorrow describing a
  new algorithm for triangle decimation that
  increases performance dramatically here
• This is important because the data sets are
  HUGE!!!

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Future Work

• Other Preliminary Work
• Data Selection
• Back to DiRT
• Three Methods
• Volumetric Fog
• Diffuse Reflection
• Particle Systems
• Probably not effective due to the processing
  power needed.
• Video Example

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Thank You
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