Learning Processing: A Beginner's Guide to Programming Images ...

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Index AIFF (Audio Interchange File Format) 380 , 382 Algorithms 165 Act II, getting ready for 188–9 catcher, 168–70 from ideas to parts 167–8 intersection 170–5 project 189 puttin ’ on the Ritz 182–8 raindrops 178–82 timer 176–8 Alpha transparency 14 Angles 210–11 Animation: with image 255–6 of text 309–12 API (Application Programming Interface) 349 Append( ) function 157 , 158 Apple Computers 273 Applets 20 Arc( ) 8 , 9 Arduino web sites 369 Arguments 25 , 108–13 ArrayList 426–9 ArrayOfInts 145 Arrays 141 concepts 144–5 declaration and creation of 145–6 of images 258–9 initialization 146–7 interactive objects 154–7 of objects 152–4 operations 144 , 147–9 processing’s array functions 157–9 snake 150–2 Zoogs in 159–60 ASCII (American Standard Code for Information Interchange) code 364 , 370 Asterisk 363 Asynchronous requests 339–42 vs. synchronous requests 353–4 Audacity 382 Available( ) function 275 , 355 Background removal 292–4 Background( ) function 11 , 36 , 195 BeginRecord( ) function 398 BeginShape( ) function 231 , 233 Bit 10 BlobDetection 298 Blobs 298 Block of code 32 Boolean expressions 61 Boolean variables 71–4 Bouncing ball 74–8 Box( ) function 235 Brightness mirror 284–6 Brightness( ) function 288 Broadcasting 360–2 Bubble class constructor 329 Bug 191 Built-in libraries 196 Byte 10 Callback function 276 , 340 Capture constructor 275 Capture object 274–5 CaptureEvent( ) function 276 , 340 , 355 Cartesian coordinates 212 Casting 57 , 427 Catcher 168–70 Caught( ) function 185 “ CENTER ” mode 6 , 7 Change( ) function 331 Characters 47 CharAt( ) function 304 , 316 , 323 Charcount 313 Clapper 390 Class 122 , 407 Class JavaExample 423 Class name 125 Client: creation 358–9 multi-user communication 366–7 Codec 402 Coding, in processing 20–3 Color selector 13 Color transparency 14–15 ColorMode( ) function 15 , 257 Compilation 26 Computer vision 287–91 libraries 297–8 Concat( ) function 157 Index 447
448 Index Concatenation 258 , 306 , 324 Conditionals: boolean expressions 61 boolean variables 71–4 bouncing ball 74–8 description 65–7 if, else, else if 62–4 logical operators 67–9 multiple rollovers 69–70 physics 101 , 79–81 Constrain( ) function 65 , 66 , 89 Constructor 125 arguments 131–4 Contains( ) function 429 , 430 Contributed libraries 196–8 Control structure 84 Convolution( ) function 269 Copy( ) 292 , 304 “ CORNER ” mode 6 , 7 Cos( ) function 213 Cosine 212 , 213 CreateFont( ) function 308 CreateImage( ) function 255 Curve vertex 233 Curve( ) 8 , 9 Custom color ranges 15–16 Dampening eff ect 80 Data 125 types 47 Data input 323 asynchronous requests 339–42 sandbox 352 splitting and joining 324–7 string manipulation 323–4 text analysis 338–9 text fi les, reading and writing 327–33 text parsing 333–8 XML 342–6 XML library, processing 346–9 Yahoo API 349–52 Data streams 353 broadcasting 360–2 client creation 358–9 multi-user communication 362 client 366–7 server 362–5 server and client 368 serial communication 368–71 with handshaking 371–2 with strings 372–4 server creation 354–7 synchronous vs. asynchronous request 353–4 Debugging 191 human being, involvement of 191 println( ) 193–4 simplify 192–3 taking a break 191 Decimal numbers 47 Delimiter 325 Descartes, René 212 Display( ) function 107 , 108 , 155 , 193 , 230 , 245 Displaying text 306–9 , 315–21 Dist( ) function 116 , 117 , 172 Do-while loop 85 Doorbell 382 with Minim 385–6 with Sonia 382–4 Dot syntax 195 , 127 Double-buff ering process 36 Double-threshold algorithm 391 Draw( ) function 32–4 , 36 , 37 , 38 , 72 , 75 , 90 , 93 , 94 , 96 , 103 , 105 , 107 , 110 , 114 , 123 , 179 , 183 , 227 , 255 , 307 , 310 Draw( ) loop 51 , 150 , 275 DrawBlackCircle( ) function 105 , 109 DrawCircle( ) 218 DrawSpaceShip( ) function 104 DrawZoog( ) function 118 Duration( ) function 281 Eclipse 434 , 435 Ellipse 5 with variables 55 Ellipse( ) function 24 , 109 , 227 , 230 Encapsulation 407–40 EndRaw( ) function 399 EndRecord( ) function 398 , 399 EndShape( ) function 231 , 233 Equals( ) function 305 , 323 Error 23–4 exception handling, in Java 432–3 messages 437–44 Exit conditions 88–90 Expand( ) function 157 Export Application 395–6 Exporting 395 high-resolution PDFs 397–400 images/saveFrame( ) 400–1 MovieMaker 401–3 stand-alone applications 395–7 web applets 395 Extends PApplet 423 Factorial 217 Fil( ) function 104
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Learning Processing A Beginner’s
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Learning Processing A Beginner’s
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Contents Acknowledgments vii Introd
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Acknowledgments In the fall of 2001
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Introduction What is this book? Th
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Introduction xi While both of these
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Introduction xiii Th e book is desi
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Introduction xv Th is book’s web
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Introductory Exercise: Write instru
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Lesson One The Beginning 1 Pixels 2
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1 Pixels “ A journey of a thousan
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1.2 Simple Shapes Pixels 5 Th e vas
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0 1 2 3 4 5 6 7 8 9 fi g. 1.9 top l
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1.3 Pixels 9 Exercise 1-3: Reverse
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Example 1-2: noFill ( ) background(
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fi g. 1.19 Pixels 13 Exercise 1-5:
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colorMode(RGB,100); Pixels 15 Th e
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2 2.1 Processing “ Computers in t
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fi g. 2.2 Once you have opened the
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Let’s write a fi rst example ( se
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Line 9 fi g. 2.6 Processing is case
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fi g. 2.7 Processing 25 Processing
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Example 2-1: Zoog again size(200,20
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Processing 29 To see the applet wor
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3 3.1 Interaction “ Always rememb
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Let’s look at what will surely be
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3.3 Variation with the Mouse Intera
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Draw Zoog's eyes fill(0); ellipse(8
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3.4 Mouse Clicks and Key Presses In
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Draw Zoog's eyes fill(mo useX,0,mou
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Lesson Two Everything You Need to K
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4 4.1 Variables “ All of the book
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4.2 Variable Declaration and Initia
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A variable can also be initialized
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x = 5; x = a + b; x = y - 10 * 20;
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void draw() { // Draw the backgroun
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4.6 Random: Variety is the spice of
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4.7 Example 4-7: Filling variables
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5 5.1 Conditionals Conditionals 59
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Finally, for testing multiple condi
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Conditionals 63 It is worth pointin
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Conditionals 65 Getting into the ha
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Our fi rst instinct might be to wri
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5.5 Multiple Rollovers Conditionals
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Conditionals 71 We can then check t
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5.7 Conditionals 73 Exercise 5-8: E
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Reversing the Polarity of a Number
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One way to solve this problem is to
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Display the square fill(0); noStrok
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6 Loops “ Repetition is the reali
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Loops 83 (see Chapter 5). However,
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while (y < 100) { // Loop! } 3. Wha
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while (x < = endLegs) { line(x,y,x,
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Th e same exact loop can be program
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Loops 91 Th is was a nice simplifi
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6.6 Loop Inside the Main Loop Loops
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6.7 float distance = abs(mouseX - i
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Draw Zoog's legs stroke(0); line(x-
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Lesson Three Organization 7 Functio
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7 7.1 Functions “ When it’s all
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7.2 “ User Defi ned ” Functions
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Example 5-6: Bouncing ball // Decla
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7.5 Functions 107 Exercise 7-3: Tak
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Functions 109 It should be fairly a
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int globalX = 0; int globalY = 100;
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void setup() { println( "a"); funct
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If we did not include a return stat
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7.8 Zoog Reorganization Zoog is now
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void draw() { } background(0); // D
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8 8.1 Objects “ No object is so b
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Setup: Draw: Initialize car color.
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Objects 125 • The Class Name—Th
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Objects 127 One other thing; with t
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fi g. 8.1 fi g. 8.2 fi g. 8.4 fi g.
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Objects 131 Nevertheless, this is q
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void draw() { } background(100); ba
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Objects 135 modular, reusable packa
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Lesson Three Project Step 1. Take y
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Lesson Four More of the Same 9 Arra
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9 Arrays “ I might repeat to myse
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Car myCar80 Car myCar81 Car myCar82
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9.3 Declaring and Creating an Array
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9.4 Initializing an Array One way t
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Example 9-5: Using a for loop to in
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Arrays 151 Now comes the hard part.
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9.7 Arrays 153 Exercise 9-7: Rewrit
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9.8 Interactive Objects Arrays 155
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Check if point is inside of Stripe
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alls[i].gravity(); balls[i].move();
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Draw Zoog's arms with a for loop fo
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Lesson Five Putting It All Together
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10 10.1 Algorithms “ Lather. Rins
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Translating the preceding algorithm
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void draw() { background(255); stro
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Example 10-2: Bouncing ball class c
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Now that the function is complete,
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10.6 // Constructor Ball(float temp
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Algorithms 177 With the above logic
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Drop() { r = 8; // All raindrops ar
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Example 10-7: Drops one at a time /
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Algorithms 183 Notice how every sin
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oolean intersecting = ball1.interse
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} void setLocation(float tempX, flo
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Algorithms 189 It is important to r
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11 Debugging “ Th e diff erence b
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Debugging 193 Once all the code is
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12 Libraries “ If truth is beauty
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or /Applications/Processing 0135/ c
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Lesson Six The World Revolves Aroun
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13 Mathematics Mathematics 201 “
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Mathematics 203 Th erefore, modulo
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Th e probability of a coin fl ippin
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13.6 Perlin Noise Mathematics 207 O
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Mathematics 209 How quickly we incr
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It is fairly intuitive for us to th
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fi g. 13.9 y-axis sine(theta) � y
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Example 13-6: Oscillation float the
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Mathematics 217 In 1975, Benoit Man
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Mathematics 219 said about recursio
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Mathematics 221 A two-dimensional a
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Example 13-10: Two-dimensional arra
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} void display() { } // FILL IN Mat
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14 14.1 Translation and Rotation (i
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Our fi rst instinct might be to add
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Example 14-3: A rectangle moving al
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When using the OPENGL mode, you mus
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Translation and Rotation (in 3D!) 2
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14.5 fill(150,150); vertex(-t, t,-t
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14.6 Example 14-5: Rectangle rotati
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fill(0,100); // Note the use of pus
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14.9 Example 14-17: Nested push and
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stroke(0); fill(175); ellipse(0,0,d
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Lesson Seven Pixels Under a Microsc
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15 Images Images 255 “ Politics w
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And yet: PImage img = loadImage( "f
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15.3 My Very First Image Processing
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Images 261 Even better, if we just
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Images 263 // Create a grayscale co
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Images 265 15.6 Intro to Image Proc
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Images 267 Since we are altering th
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15.9 More on fi lter( ): fi lter(mo
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Images 271 Example 15-13 performs a
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Example 15-14: “ Pointillism ”
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16 16.1 Video “ I have no memory.
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Video 277 Th e above line of code i
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void draw() { // Check to see if a
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16.3 Recorded Video Video 281 Displ
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16.4 Video 283 Exercise 16-3: Using
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Video 285 For every square at colum
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} } // Each rect is colored white w
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16.5 Video as Sensor, Computer Visi
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Now, we are ready to compare the co
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16.6 Video 293 Exercise 16-5: Take
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void setup() { size(320,240); video
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Example 16-13: Simple motion detect
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16.8 // Step 4, compare colors (pre
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Lesson Seven Project Develop a soft
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Lesson Eight The Outside World 17 T
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17 17.1 Text “ I could entertain
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Exercise 17-2: Loop through and pri
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17.3 Displaying Text Text 309 We wi
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println(PFont.list()); For demonstr
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X = �50 fi g. 17.4 float w = text
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Example 17-4: Text mirror import pr
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textFont(f); // Set the font transl
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Exercise 17-9: Using textWidth( ) ,
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Example 17-7: Boxes along a curve P
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Text 323 Exercise 17-10: Create a s
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18 Data Input “ A million monkeys
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Example 18-1: User input PFont f; /
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Data Input 329 Th e reverse of spli
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Example 18-2: Graphing comma separa
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Data Input 333 Th e rollover( ) fun
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18.4 diameter = diameter_; } // Tru
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} // Find the index of the end tag
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void mousePressed() { // Increment
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18.6 for (int i = 0; i < kinglear.l
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Create and make an asynchronous req
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� student � � id � 002 �
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Requests for XML data are made via
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18.8 Using the Processing XML Libra
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XMLElement diameterElement = childr
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Example 18-10: A Yahoo search impor
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However, if you request a URL on a
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19 19.1 Data Streams “ I’m mad
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import processing.net.* ; Server se
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Data Streams 361 Once the server is
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19.4 void draw() { background(255);
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Data Streams 365 must be networked
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Data Streams 367 will send X , Y co
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Data Streams 369 Here is the full S
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Here is the entire client sketch: 1
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Data Streams 373 Serial communicati
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Data Streams 375 of information, ca
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Corresponding Arduino code: int sen
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Lesson Nine Making Noise 20 Sound 2
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20 Sound “ Check. Check. Check 1.
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void setup() { Sonia.start(this); }
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void mousePressed() { // If the use
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Sound 387 check and see if a sound
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Is a point inside the doorbell (use
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Pressing the mouse stops and starts
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20.6 void draw() { background(255,1
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In code, this translates to: // If
Page 416 and 417: 21 Exporting “ Wait a minute. I t
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Page 420 and 421: void setup() { size(400, 400); begi
Page 422 and 423: Exporting 403 save( ) takes one arg
Page 424 and 425: Exporting 405 Example 21-5 records
Page 426 and 427: Lesson Ten Beyond Processing 22 Adv
Page 428 and 429: 22 Advanced Object-Oriented Program
Page 430 and 431: class Point { float x,y; Point(floa
Page 432 and 433: Advanced Object-Oriented Programmin
Page 434 and 435: Advanced Object-Oriented Programmin
Page 436 and 437: class Circle extends Shape { // inh
Page 438 and 439: for (int i = 0; i < dogs.length; i
Page 440 and 441: 22.5 Example 22-2: Polymorphism //
Page 442 and 443: 23 23.1 Java “ I l o ve c off ee,
Page 444 and 445: Java 425 instead of Processing , sp
Page 446 and 447: fi g. 23.2 Java 427 Just as with th
Page 448 and 449: Particle p = parray[i]; p.run(); p.
Page 450 and 451: Hint: Add a function that returns a
Page 452 and 453: Example 23-4: Super fancy ArrayList
Page 454 and 455: Java 435 It is sad when these error
Page 456 and 457: Th e tutorials will cover the same
Page 458 and 459: Appendix: Common Errors Appendix 43
Page 460 and 461: Error: No accessible fi eld named
Page 462 and 463: void draw() { thing.display(); } Co
Page 464 and 465: Error: Perhaps you wanted the overl
Page 468 and 469: Fill( ) function 10 , 11 , 256 , 30
Page 470 and 471: One-dimensional Perlin noise 208 OP
Page 472: solar system, processing 247-9 vert
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