self.Velocity.Truncate( self.MaxSpeed )      # make the velocity not exceed max speed

Truncate method is defined as:

def Truncate( self, max ):
    """Truncates a vector so that its length does not exceed max"""
    if self.get_length() > max:
        self = self.normalized()
        self  = (self * max)

When self.Velocity call truncate method, its value doesn't change! WHY??????

Velocity is a Vector2D class which defines a 2d vector. It contains two values, x and y. the computing result inside the Truncate method is totally correct. However, after Velocity calling the Truncate value, Velocity doesn't change at all!

check all other similair methods!!!!!!!

It is very important to make behavior visible quickly. This will help to ajust some parameters of a man, and to better understand how pygame works. To achive that, we should:

1. Finish coding man's update function.
2. Finish coding SteeringBehavior.Calculate() and Wander() functions.
3. Finish coding GameWorld class.

When CohesionOn() is called, the whole game's FPS will sharply go down.

I finished coding the multi-threading update code, and I think it works find. The code improves FPS sufficiently.

However, every man seems to be moving more slowly.

I don't know why?

Finish Matrix related classes and some other math classes, for they are the base of a game.

The next four lines are for testing Task List features:

• @mentions, #refs, links, formatting, and tags supported
• list syntax required (any unordered or ordered list supported)
• this is a complete item
• this is an incomplete item

Here are some tasks we need to do to improve game performance and enhance software features.

Multi-threading

• Create a multi-threading class to handle multi-thread related works.
• The class should be able to define any number of threads we want to creat.
• The class should allow programmers to fork threads easily and change its status at any moment.
• The class should handle synchronization issues, and provide a method that will be called after all threads finish their jobs in a frame.
• The class should be compatable with cell-space-partition-realated classes, since that is where multi-threading strategy will be called most frequently.

Graphics User Inerface

• Create a GUI class to handle graphics user interface related works.
• The class shoule be able to draw GUI components in the screen.
• GUI should be transparent in the screen, so users can see more about the game world.
• The most important thing for GUI class is to build hospitals or other buildings in the world.
• Texture can be attached to each cell of a GUI components.

Steering Behavior

There are still many features unfinished in the steering bahavior class The following features have the highest priorities:

• Evade
• Pursuit
• Cohesion
• Seek
• Flee
• Arrive
• Alignment
• Test Evade
• Test Pursuit
• Test Cohesion
• Test Seek
• Test Flee
• Test Arrive
• Test Alignment

Man State Machines

• Create Two State Machines for a man: Position-related state machine and Health-related state machine

Position-Related State Machine includes:

• Wander State
• Pursuit State: Pursuit a target
• Evade State: Evade a pursuer
• Arrive State: Arrive at some place: such as a building or an area.
• Alignment State
• Cohesion State

Health Related State Machine includes:

• Healthy State
• Infected State: the man got infected by a virus
• Infected-Incubate State: the virus is incubating
• Infected-Onset State: the virus breaks out and attacks the man
• Infected-Curing: The infected man is under medicine care
• Dead State: The man is dead