DOVE
Shuen-Huei Guan, Sheng-Yao Cho,
Yu-Te Shen, Ping-Chun Kuo
Final Project of Virtual Reality
Computer Science and Information Engineering
National Taiwan University
June, 2003
Dove?!
• Dove is
.
• Dove is Our Virtual Experience.
• Dove is Dove Simulation.
Introduction
• A simulation of pigeons on the square.


Flying in the sky.
Looking for food.
• Feed interactively by a tracker.
• Display by Vision Station.
How to make Dove
•
•
•
•
Understand more about pigeons.
Analyze behaviors of pigeons.
Find the model to do simulation.
Do programming.
DV clip
Pigeons Behaviors
Pigeons Behaviors
Eating
Don’t know where food is
Know where food is
Approach to people/doves
Approach to food
Grouping behavior
To leader
當跟屁蟲
Lovable dove
idle
Slowly wandering
cleaning
Feather-cleaning
Pigeons Behaviors cont.
Approach
In air
On the ground
I am in the air
I am on the ground
I am in the air
Fly + land
fly
near
far
middle
hungry
Fast approach
Not hungry
Slow approach
hungry
Takeoff + fly + land
Takeoff + fly + land
Not hungry
Fast approach
I am on the ground
Takeoff + fly
Related Works
• Animating bird flight using aerodynamics.
• Realistic Modeling of Bird Animations.
• Stanley and Stella in: Breaking the Ice.
Flocking
• Flocking simulates movements of
autonomous characters.
Character {
mass
position
orientation
velocity
max speed
max force
}
[scalar]
[vector]
[N basis vectors]
[vector]
[scalar]
[scalar]
Flocking cont.
• The behavior of an autonomous character
can be better understood by dividing it into
several layers.
Action Selection: strategy, goals, planning
Steering: path determination
Locomotion: animation, articulation
Flocking of Pigeons
Action Selection (strategy, goal, planning)
(behavior/desire :
1.root for food 2.wander 3.defense or offense)
Steering (path determination)
(individual dove’s movement : following, avoiding…)
Locomotion (animation, articulation)
(animation : walking, flying…)
Demo Program: Boids
• Separation
• Alignment
• Cohesion
What has done
• Reference: flocking, pigeon’s animation.
• Movie:


DV in Chiang Kai-Shek Memorial Hall.
Discovery & National Geometry in NTU Lib.
• Pigeon 3D model & animation.
• Pigeons’ behaviors.
• Demo program.
What has not done
•
•
•
•
Animation set for pigeons.
Vision station & tracker.
We need cute children involved.
Sound & graphical effects.
Members
•
•
•
•
Shuen-Huei Guan（官順暉）
Sheng-Yao Cho（卓聖堯）
Yu-Te Shen（沈育德）
Ping-Chun Kuo（郭秉鈞）
Special Thanks
• Wei-Chih Liao（廖偉智）
Reference
• Jia-Chi Wu and Zoran Popvic, Realistic Modeling of Bird
Animations, SIGGRAPH 2003.
• Balajee Ramakrishnananda and Kok Cheong Wong,
Animating bird flight using aerodynamics, The Visual
Computer, 1999.
• Celine Loscos, Franco Tecchia, and Yiorgos
Chrysanthou, Real-Time Shadows for Animated Crowds
in Virtual Cities, ACM Symposium on Virtual Reality
Software & Technology, 2001.
• Craig Reynolds, http://www.red3d.com.