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

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One-dimensional Perlin noise 208 OPENGL 230–1 Origin, defi nition of 227 OSC (open sound control) 379 Oscillation 214–16 Overloading 419 P3D 230–1 PApplet 423 Particle system 427 Pass by reference 135 Pass by value 113 Passing parameters 111 Pde fi le 20 , 128 , 131 Perlin noise 207–10 PFont.list( ) 308 Physics 101 , 79–81 PI, defi nition of 211 Pixel point 270 Pixels 3 , 260–2 color transparency 14–15 custom color ranges 15–16 graph paper 3–4 grayscale color 10–12 PImage object 265–6 pixel group processing 267–70 RGB color 12–14 simple shapes 5–9 Play( ) function 279 , 380 , 384 , 387 Pointillism 270–1 Polar coordinates 212 to Cartesian 213 Polymorphism 416–18 PopMatrix( ) function 241 , 243 , 244 , 245 , 246 , 249 Port numbers 354 Present mode 19 Primitive data types 113 , 253 Primitive shapes 5 Primitive values 47 Println 193–4 Println( ) function 22 PrintMatrix( ) function 241 Probability review 204–5 event probability, in code 205–7 Procedures see Functions Processing fi lter 256–7 Processing graphics 253 Processing library 350 Processing software 17 application of 18–20 coding 20–3 , 26–8 errors 23–4 Index 451 play button 26 publishing, as Java applet 28–9 reference 24–6 sketchbook 20 ProSVG 400 Pseudocode 168 Pseudo-random numbers 203 Public/private classes, in Java 423 Publishing, as Java applet 28–9 Pushing and popping, matrix 240–7 PushMatrix( ) function 241 , 243 , 244 , 245 , 246 , 248 Puttin ’ on the Ritz 182–8 Quad( ) 8 , 9 QuickTime libraries 273 QuickTime movies 401–3 Radians, defi nition of 210–11 Radians( ) function 211 Raindrops 178–82 Random numbers 203–4 distribution 204 Random( ) function 55 , 56 , 57 , 66 , 115 , 203 Randomizer( ) function 113 Read( ) function 275 ReadRawSource( ) function 340 ReadString( ) function 355 ReadStringUntil( ) function 364 Really Simple Syndication (RSS) 344 Recorded video 279–81 Rect( ) function 24 , 87 , 104 , 227 , 230 , 429 Rectangle class 429–32 Recursion 216–20 Reference, in processing 24–6 RequestWeather( ) function 336 Reserved words 22 RestoreMatrix( ) 243 Return statement 115 Return type 114–17 Reverse( ) function 157 RGB color 12–14 Rollover( ) function 154 , 330 Rotate( ) function 210 , 235 , 236 , 238 , 256 RotateZ( ) function 242 , 244 Rotation, around axes 237–40 Sandbox 298 , 352 SaveData( ) function 331 SaveFrame( ) 400–1 SaveMatrix( ) 243 SaveString( ) function 331 , 332 Scale 240
452 Index Scribbler mirror 286–7 Search( ) function 350 , 351 SearchEvent( ) 350 Serial communication 368 with handshaking 371–2 with strings 372–4 SerialEvent( ) function 370 Server: creation 354–7 for multi-user communication 362–5 ServerEvent( ) function 355 SetRate( ) function 387 Setters 408 Setup( ) functions 32–4 , 38 , 75 , 93 , 103 , 105 , 123 , 150 , 182 , 183 , 242 , 255 , 307 SetVolume( ) function 386 Shapes 413–16 Shorten( ) function 157 Simple background removal 293–4 Simple color tracking 290–1 Simple modularity 106–8 Simple rotation 235–7 Simple shapes 5–9 SimpleML library 197 , 339 , 340–2 SimplePostScript 400 Sin( ) function 213 Sine 212 , 213 , 216 Size( ) function 21 , 229 , 230 , 231 Sketchbook 20 Sketches 18 , 20 SketchName.exe 396 Smooth( ) function 27 Socket connection 354 Software mirrors 281–7 Sohcahtoa 212 Solar system, processing 247 object-oriented 248–9 Sonia library 379 , 380–1 Sonia.stop( ) function 381 Sort( ) function 157 Sound 379 libraries for 380–1 LiveInput 388–90 playback 381–6 volume, pitch, and pan control 386–8 thresholding 390–3 Sound events, with Sonia 392–3 Source directory 396 Spatial convolution 268 Splice( ) function 157 Split( ) function 325 , 326 Stand-alone applications 395–7 Start( ) function 183 State variable 78 Static functions 389 Strings 303–6 manipulation 323–4 serial communication with 372–4 Stripe object 154–5 Stroke( ) function 10 , 11 , 24 , 195 Subroutines see Functions Subset( ) function 157 Substring( ) function 323 , 324 , 334 Super( ) 412 , 414 SVG (Scalable Vector Graphics) 400 Synchronous vs. asynchronous requests 353–4 System variables 54–5 Tangent 212 Telnet client 357 Text 303 analysis 338–9 animation 309–12 character by character, displaying 315–21 displaying 306–9 mosaic 312–14 parsing 333–8 rotating 314–15 strings 303–6 Text fi les, reading and writing of 327–33 creating objects 329 loading and saving data 331–3 Text( ) function 316 TextAlign( ) function 309 TextFont( ) function 308 TextLeading( ) function 311 TextMode( ) function 311 TextSize( ) function 311 TextWidth( ) 310 , 311 , 316 Th estring.length( ) 324 “ Th ing ” class, error messages of 442 Th ird party library 197 Th reshold fi lter 265 Timer 176–8 Tint( ) function 256 , 257 , 264–5 ToUpperCase( ) function 323 Transformation matrix 241 Translate( ) function 227 , 228 , 229 , 230 , 236 , 244 , 256 Translation and rotation, in3D 225 custom 3D shapes 233–5 diff erent axes, of rotation 237–40 OPENGL 230–1 P3D 230–1 pushing and popping 240–7 scale 240 simple rotation 235–7
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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
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21 Exporting “ Wait a minute. I t
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Th is code can be inserted anywhere
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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 466 and 467: Index AIFF (Audio Interchange File
Page 468 and 469: Fill( ) function 10 , 11 , 256 , 30
Page 472: solar system, processing 247-9 vert
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