eecs 110 projects 1&2

EECS 110Projects 1&2

Ionut Trestian

Northwestern University

Option #1, vPool

Table

Cue (optional)

Cue ball

Billiard Ball (at least 2)

Hole (optional)

Option #1: virtual pool

VPython?Easily installable for windows…

Not (really) installable for the Mac

A simple example

from visual import *

c = cylinder()

What's visual?

What's c?

www.vpython.org


from visual import *

floor = box( pos=(0,0,0), length=4, height=0.5, width=4, color=color.blue)

ball = sphere( pos=(0,4,0), radius=1, color=color.red)

ball.velocity = vector(0,-1,0)dt = 0.01

while True: rate(100) ball.pos = ball.pos + ball.velocity*dt

if ball.y < ball.radius: ball.velocity.y = -ball.velocity.y else: ball.velocity.y = ball.velocity.y - 9.8*dt

How many classes?

How many objects?

data members?

What's the if/else

doing?


Phunky Fisicks is welcome!

Collisions with walls?

Collisions with other pool balls?

Pockets?


To start, just design your table, try to construct a scene which consists of the following objects:

- table – made of walls, box objects- holes (optional) – use sphere objects- cueBall – another sphere-cue (optional) – cylinder object- billiard balls (at least 2) – sphere objects- you also should take a look at label objects to display game texts

After you place all the objects you should have something similar to …


Your main game loop should basically consist of:

while gameOver == False: m = scene.mouse.getclick() #click event – cue hit # get mouse position and give the cue ball a direction # based on that

# perform movement of the cue ball as shown before # handle collisions between different balls and # between balls and walls

# check if game is over – when all balls have # been put in


Directing the cue ball:

temp = scene.mouse.project(normal=(0,1,0), point=(0,-side,0))

this gets a vector with the projection of the mouse on the pool table.

if temp: # temp is None if no intersection with pool table cueBall.p = norm(temp – cueBall.pos)

The cue ball direction is now given by the vector that results from the difference of the point where we clicked projected on the pool table and the actual position of the cue ball

So clicking in front of the cue ball will make it go into that direction.


Moving the cue ball:

dt = 0.5t = 0.0while dt > 0.1: sleep(.01) t = t + dt dt = dt-dt/200.0 cueBall.pos = cueBall.pos + (cueBall.p/cueBall.mass)*dt

We basically start with a bigger movement increment (0.5), move the ball in the direction we computed with the specific increment.

Each time decrease the increment to account for drop in velocity. Stop at some point (0.1)


Handling collisions:

With walls:

if not (side > cueBall.x > -side): cueBall.p.x = -cueBall.p.x if not (side > cueBall.z > -side): cueBall.p.z = -cueBall.p.z

When hitting wall, change directions


When is a ball in?

if math.sqrt(math.pow(abs(ball1.x-hole1.x),2) + math.pow(abs(ball1.z-hole1.z),2)) <= hole1.radius*2: ballin = 1 ball1.visible = 0 ball1.y = 50

Holes are just spheres so we determine intersection between ball and hole same way as for different balls.

When ball is in we do a few things: Signal that a ball has been put in (might be useful later)Make the specific ball invisibleMove it out of the way


Handling the game logic?

• Need a way to keep track of players taking turns. • Suggestion: use a simple variable for that which changes after every hit (take into account if balls have been sunk or not)

• Players need to be aware of the game flow, so show labels that display which player has turn, when the game was won and by whom

• The game is finished when all the balls are in, that is when all the balls are invisible. You can use that for check.

Project #2: text clouds

tag cloud


text cloud

Summary of the words in a body of text, sized and painted according to their frequency.

Demos:http://www.cs.hmc.edu/~hadas/textclouds/ orhttp://blue.cs.northwestern.edu/~ionut/index.html on:

http://www.gutenberg.org/files/74/74-h/74-h.htmhttp://www.gutenberg.org/files/76/76-h/76-h.htm

http://www.cs.hmc.edu/~hadas/textclouds/

Text-cloud historyhttp://chir.ag/phernalia/preztags/


From text…

… to cloud

1. Start with entered webpage (URL)

2. Read in text

3. Create list of words out of text

4. "Clean" the words

5. "Stem" the words

6. Count the words

7. Return a string with frequencies

8. Add advanced features…

Text Clouds, an example

http://cs.northwestern.edu/~akuzma/classes/EECS110-s09/projects/project2/page1.html

Spamming spammers spammed spam. Spam spam spam! I love spam! Page 2

ignore this link for now

['spamming', 'spammers', spammed', 'spam', 'spam', 'spam', 'spam','love', 'spam', 'page', '2']

['spamming', 'spammers', spammed', 'spam.', 'spam', 'spam', 'spam!','I', 'love', 'spam!', 'page', '2']

['spam', 'spam', spam', 'spam', 'spam', 'spam', 'spam','love', 'spam', 'page', '2']


An Approach

Develop the basic application the usual way (IDLE)

Once you have everything working, transfer your .py files to your webspace. Set up the HTML wrapper files & go!

Use our code to read HTML, but don't bother writing it yet…

Personalize! The project has a number of references…

Once you have things working, try writing HTML/searching beyond depth 1/etc (NEXT SLIDE)

Project #2: searching beyond depth 1

def mtcURL(url):

toVisit[url] = 0 #toVisit is a dictionary

visited[url] = 1 #visited is a dictionary

returnText = ''

while len(toVisit) != 0:

[url, depth] = toVisit.popitem()

[textSite, listUrls] = getHTML(url)

An Approach (1/2)

Project #2: searching beyond depth 1

…

for urlItem in listUrls:

if visited.has_key(urlItem) == False \

and depth < DEPTH:

visited[urlItem] = 1

toVisit[urlItem] = depth + 1

wordList = textSite.split()

…

An Approach (2/2)

Questions?

eecs 110 projects 1&2

Documents