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EECS 110: Lec 16: Projects

Explore the exciting world of virtual pool game design for your EECS 110 project. From setting up the table layout to directing the cue ball and handling collisions, uncover the key elements required to create an engaging gameplay experience. Dive into the strategy of moving the cue ball and master the art of handling collisions with walls and other balls. Learn how to determine when a ball enters a pocket and implement game logic to keep track of players' turns. Take your project to the next level with this comprehensive guide to building a virtual pool game.

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EECS 110: Lec 16: Projects

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  1. EECS 110: Lec 16: Projects Aleksandar Kuzmanovic Northwestern University http://networks.cs.northwestern.edu/EECS110-s18/

  2. the view from here… The Rest of the Class… Fri., 6/1 –project recitations by TAs (10am) Fri., 6/1 –project recitations (Wilkinson Lab) (1-3pm) Sun., 6/3 –Interim milestones due (11:59pm) Mon., 6/4 –review for Final Exam Tue., 6/5 –project recitations (Wilkinson Lab) (9-12) Wed., 6/6 –Final Exam Fri., 6/8 –Final exam solutions (10am) Sun., 6/10 –Final projects due (11:59pm)

  3. EECS 110 today… Today in EECS 110 • All about the EECS 110 projects! vPool Text Clouds pyRobot picobot

  4. Final projects open-ended Final assignment comprehensive more choice… Working solo or duo is OK Pairs need to share the work equally and together

  5. Option #1, vPool Cue ball Table Billiard Ball (at least 2) Cue (optional) Hole (optional)

  6. 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?

  7. 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?

  8. Option #1: virtual pool Phunky Fisicks is welcome! Collisions with walls? Collisions with other pool balls? Pockets?

  9. 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 …

  10. Option #1: virtual pool

  11. 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

  12. 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.

  13. 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)

  14. 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

  15. 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

  16. 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.

  17. Project #2: text clouds tag cloud

  18. Project #2: text clouds text cloud Summary of the words in a body of text, sized and painted according to their frequency. Demo: 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

  19. Text-cloud history http://chir.ag/phernalia/preztags/

  20. 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

  21. Text Clouds, an example http://networks.cs.northwestern.edu/EECS110-s18/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']

  22. 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…

  23. 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)

  24. 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() …

  25. pyRobot option #3 Pt A 2d Roomba simulator Goal: get from Pt A to Pt B Pt B

  26. pyRobot option #3 IMPORTANT: ROBOT CAN START ANYWHERE! Pt A Pt B IMPORTANT: GOAL CAN BE ANYWHERE

  27. Project #3: pyRobot whileTrue: SENSE [x,y,thd], bump = self.getData()

  28. 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!

  29. 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

  30. 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)

  31. 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!

  32. 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!

  33. 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....

  34. Maps are set at the very bottom of the main.py file: Required We may test on any map with rectangular objects

  35. Project #4: Picobot Returns!

  36. 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

  37. 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 ...

  38. 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

  39. Graphics Library • Graphics22.py (recommended)

  40. Graphics Library • Graphics22.py (recommended) • You can use others as well: • E.g., vPython

  41. Plotting a window from graphics22 import * def main(): win = GraphWin("MyWindow", 400, 400)

  42. 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)

  43. 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)

  44. 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“)

  45. 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“)

  46. 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)

  47. What’s due? Sun., 6/3 – 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

  48. What’s due? Sun., 6/10 – 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

  49. This and next week Fri., 6/1 –project recitations by TAs (10am) Fri., 6/1 –project recitations (Wilkinson Lab) (1-3pm) Sun., 6/3 –Interim milestones due (11:59pm) Mon., 6/4 –review for Final Exam Tue., 6/5 –project recitations (Wilkinson Lab) (9-12) Wed., 6/6 –Final Exam Fri., 6/8 –Final exam solutions (10am) Sun., 6/10 –Final projects due (11:59pm)

  50. Be inventive – we will reward that! Ask TAs for help Good luck with the projects!

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