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EECS 110: Lec 16: Projects. Aleksandar Kuzmanovic Northwestern University. http://networks.cs.northwestern.edu/EECS110-s14/. the view from here…. The Rest of the Class…. Fri., 5/30 – project recitations by TAs (10am). Fri., 5/30 – project recitations (Wilkinson Lab) (1-3pm).

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EECS 110: Lec 16: Projects

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EECS 110: Lec 16: Projects

Aleksandar Kuzmanovic

Northwestern University

http://networks.cs.northwestern.edu/EECS110-s14/


the view from here…

The Rest of the Class…

Fri., 5/30 –project recitations by TAs (10am)

Fri., 5/30 –project recitations (Wilkinson Lab) (1-3pm)

Sun., 6/1 –Interim milestones due (11:59pm)

Mon., 6/2 –review for Final Exam

Tue., 6/3 –project recitations (Wilkinson Lab) (9-12)

Wed., 6/4 –Final Exam

Fri., 6/6 –Final exam solutions (10am)

Sun., 6/8 –Final projects due (11:59pm)


EECS 110 today…

Today in EECS 110

  • All about the EECS 110 projects!

vPoolText Clouds pyRobot picobot

ningxia2015@u.northwestern.edu

ArindamPaul2012@u.northwestern.edu


Final projects

open-ended

Final assignment

comprehensive

more choice…

Working solo or duo is OK

Pairs need to share the work equally and together


Option #1, vPool

Cue ball

Table

Billiard Ball (at least 2)

Cue (optional)

Hole (optional)


Option #1: virtual pool

Easily installable for windows…

VPython?

Not (really) installable for the Mac

www.vpython.org

A simple example

from visual import *

c = cylinder()

What's visual?

What's c?


Option #1: virtual pool

How many classes?

How many objects?

data members?

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

whileTrue:

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

What's the if/else doing?


Option #1: virtual pool

Phunky Fisicks is welcome!

Collisions with walls?

Collisions with other pool balls?

Pockets?


Option #1: virtual pool

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 …


Option #1: virtual pool


Option #1: virtual pool

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


Option #1: virtual pool

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.


Option #1: virtual pool

Moving the cue ball:

dt = 0.5

t = 0.0

while 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)


Option #1: virtual pool

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


Option #1: virtual pool

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 invisible

Move it out of the way


Option #1: virtual pool

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


Project #2: text clouds

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/ or

http://blue.cs.northwestern.edu/~ionut/index.html on:

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

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


Text-cloud history

http://chir.ag/phernalia/preztags/


Project #2: text clouds

From text…

  • Start with entered webpage (URL)

  • Read in text

  • Create list of words out of text

  • "Clean" the words

  • "Stem" the words

  • Count the words

  • Return a string with frequencies

  • Add advanced features…

… to cloud


Text Clouds, an example

http://networks.cs.northwestern.edu/EECS110-s14/projects/

project2/page1.htm

ignore this link for now

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

['spamming', 'spammers', spammed', 'spam.', 'spam', 'spam', 'spam!',

'I', 'love', 'spam!', 'page', '2']

['spamming', 'spammers', spammed', 'spam', 'spam', 'spam', 'spam',

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

['spam', 'spam', spam', 'spam', 'spam', 'spam', 'spam',

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


Project #2: text clouds

An Approach

Develop the basic application the usual way (IDLE)

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

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

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

Personalize! The project has a number of references…


Project #2: searching beyond depth 1

An Approach (1/2)

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)


Project #2: searching beyond depth 1

An Approach (2/2)

for urlItem in listUrls:

if visited.has_key(urlItem) == False \

and depth < DEPTH:

visited[urlItem] = 1

toVisit[urlItem] = depth + 1

wordList = textSite.split()


pyRobot option #3

Pt A

2d Roomba simulator

Goal: get from Pt A to Pt B

Pt B


pyRobot option #3

IMPORTANT:

ROBOT CAN START ANYWHERE!

Pt A

Pt B

IMPORTANT:

GOAL CAN BE ANYWHERE


Project #3: pyRobot

whileTrue:

SENSE

[x,y,thd], bump = self.getData()


Project #3: pyRobot

Robot control continuously runsthree things:

whileTrue:

SENSE

PLAN

[x,y,thd], bump = self.getData()

if bump[0] == Trueor bump[1] == True:

print'BUMP!',

print' [Left bump sensor:', bump[0], '] ',

print' [Right bump sensor:', bump[1], '] '

robotTask = STOP

STOP is one of the robot's states. Every 40th of a second, the robot runs through this loop, sets the robot's state and sets the velocities accordingly. Don't sleep!


Project #3: pyRobot

Robot control continuously runsthree things:

whileTrue:

SENSE

PLAN

ACT

[x,y,thd], bump = self.getData()

if bump[0] == Trueor bump[1] == True:

print('BUMP!’)

print(' [Left bump sensor:', bump[0], '] ‘)

print(' [Right bump sensor:', bump[1], '] ’)

robotTask = STOP

STOP is one of the robot's states. Every 40th of a second, the robot runs through this loop, sets the robot's state and sets the velocities accordingly. Don't sleep!

if robotTask == STOP:

self.setVels(0,0)

robotTask = KBD


Project #3: pyRobot

BASIC ROBOT COMMANDS:

STOP:

self.setVels(0,0)

GO FORWARD:

self.setVels(FV,0)

GO BACKWARD:

self.setVels(-FV,0)

GO CLOCKWISE:

self.setVels(0,RV)

GO COUNTERCLOCKWISE:

self.setVels(0,-RV)


Project #3: pyRobot

To make the robot go forward a set amount use

The max forward velocity: FV

Example...

TIME_ONE_CIRCLE_OVER = RADIUS*2 / FV

if state==DO_GO_LEFT_LITTLE:

#FIGURE OUT HOW TO TRAVEL

pause_stop = time.time() + TIME_ONE_CIRCLE_OVER

State = GOING_LEFT_LITTLE

if pause_stop > time.time() and state==GOING_LEFT_LITTLE:

self.setVels(0,0) #STOP!

elif state==GOING_LEFT_LITTLE:

self.setVels(FV,0) #KEEP GOING!


Project #3: pyRobot

To rotate the robot use the Max Rotational Velocity: RV

Example...

TIME_ROTATE_90_DEGREES = 90.0 / RV

if state==DO_ROTATE_LEFT_DOWN: #c-cwise

#FIGURE OUT HOW LONG TO ROTATE

pause_stop = time.time() + TIME_ROTATE_90_DEGREES

State = ROTATING_LEFT_DOWN

if pause_stop > time.time() and state==ROTATING_LEFT_DOWN:

self.setVels(0,0) #STOP!

elif state==ROTATING_LEFT_DOWN:

self.setVels(0,-RV) #KEEP GOING!


Project #3: pyRobot

One way to traverse the space is

GO DOWN UNTIL BUMP SOMETHING,

GO RIGHT A LITTLE

GO UP UNTIL BUMP SOMETHINGGO RIGHT A LITTLE

DO THIS UNTIL HIT CORNER THEN

REVERSE....


Maps

are set at the very bottom of the main.py file:

Required

We may test on any map with rectangular objects


Project #4: Picobot Returns!


Project 4: Picobot

Basic idea: implement Picobot (the homework problem from Week 1)

Picobot is a finite-state machine!

Requirements:

Graphical output

Read Picobot program from a file*

Read maze description from a file

Track visited/unvisited squares

Prohibit illegal moves


Reading a Picobot program from a file

map3.txt contains solution to the HW0 problem

Syntax:

0 xxxx -> N 1

0 Nxxx -> S 2

0 xExx -> W 3

0 xxWx -> E 4

0 xxxS -> N 1

0 xEWx -> N 1

...


Reading a Picobot program from a file

Importing map3.txt into the program

f = open('map3.txt', 'r')

text = f.read()

L = text.split()

f.close()

for i in range(len(L)):

if L[i] == '->':

if L[i-1] == 'xxxx':

#ETC


Graphics Library

  • Graphics22.py (recommended)


Graphics Library

  • Graphics22.py (recommended)

  • You can use others as well:

    • E.g., vPython


Plotting a window

from graphics22 import *

def main():

win = GraphWin("MyWindow", 400, 400)


Plotting a yellow rectangle

from graphics22 import *

def main():

win = GraphWin("MyWindow", 400, 400)

p1 = Point(0,355)

p2 = Point(400,400)

rec1 = Rectangle(p1,p2)

rec1.setFill("yellow“)

rec1.setOutline("yellow")

rec1.draw(win)


Plotting an Exit button

#Exit button

p1 = Point(122,360)

p2 = Point(198,390)

square1 = Rectangle(p1,p2)

square1.setFill("gray")

square1.draw(win)

p = square1.getCenter()

t = Text(p, "Exit")

t.draw(win)


Accepting a mouse click

#loop

while True:

K = win.getMouse()

if K.getX() > 122 and \

K.getX() < 198 and \

K.getY() > 360 and \

K.getY() < 390:

win.close()

exit("The end“)


Accepting a mouse click

#loop

while True:

K = win.getMouse()

if K.getX() > 122 and \

K.getX() < 198 and \

K.getY() > 360 and \

K.getY() < 390:

win.close()

exit("The end“)


Example Functions

createOneRow( n )

createBoard(width, height)

done(X) #end of game: all visited in matrix X

next_state(Cstate,Icurr,Jcurr,X,STATE)

next_direction(Cstate,Icurr,Jcurr,X,DIRECTION)

main(nameOfFile)


What’s due?

Sun., 6/1 – Interim milestones due (11:59 pm)

milestone.txt

milestone.py

  • Name(s)

  • Project chosen

  • Description of User Interface

    What is your approach & plan?

  • Classes and functions with docstrings

  • 60-80+ lines of working, tested code


What’s due?

Sun., 6/8 – Final projects due (11:59 pm)

final.txt

final.py

  • Name(s)

  • Project chosen

  • Description of User Interface

    How do we run / play your project?

    What features did you implement?

    What was your approach & plan?

  • Classes and functions with docstrings

  • Working, tested code

A final milestone


This and next week

Fri., 5/30 –project recitations by TAs (10am)

Fri., 5/30 –project recitations (Wilkinson Lab) (1-3pm)

Sun., 6/1 –Interim milestones due (11:59pm)

Mon., 6/2 –review for Final Exam

Tue., 6/3 –project recitations (Wilkinson Lab) (9-12)

Wed., 6/4 –Final Exam

Fri., 6/6 –Final exam solutions (10am)

Sun., 6/8 –Final projects due (11:59pm)


Be inventive – we will reward that!

Ask TAs for help

Good luck with the projects!


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