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

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Fill( ) function 10 , 11 , 256 , 308 Filter( ) function 266 FinishMovies( ) function 402 Flow 31–2 “ For ” loop 90–3 Fractals 217 FrameRate( ) function 40 Functionality, of objects 125 Functions 103 arguments 108–13 defi nition 105–6 passing a copy 113–14 return type 114–17 simple modularity 106–8 splitting of 103–4 user defi ned 104 Zoog reorganization 118–19 Function’s signature 419 GetChild( ) function 347 GetChildCount( ) function 347 , 348 GetChildren( ) function 347 GetContent( ) 347 GetElementArray 346 GetElementAttributeText( ) 345 GetElementText( ) function 345 GetFloatAttribute( ) 347 GetIntAttribute( ) 347 GetStringAttribute( ) 347 GetSummaries( ) 350 Getters 408 GetTotalResultsAvailable( ) 351 Global variable 93–5 Globs see Blobs Good friends 32–4 Graph paper 3–4 Graphical user interface (GUI) 71 Grayscale color 10–12 Grayscale image 221 , 222 Handshaking, serial communication with 371–2 High-resolution PDFs 397–400 Highlight( ) function 175 Home( ) function 318 HTML 333 , 335 HTMLRequest object 340 , 341 Hypertext Transfer Protocol (HTTP) 353 If, else, else if conditionals 62–4 Image( ) function 254 , 255 , 263 Imageindex 259 Images 253 adjusting brightness 264–5 animation with 255–6 array of 258–9 creative visualization 270–2 getting started 253–5 group processing 267–70 image fi ltering 256–7 pixels 260 displaying of 263 PImage object 265–6 setting of 260 , 261–2 processing of 262–4 sequence 259 swapping of 259 tint( ) 264–5 Images/saveFrame( ) 400–1 Immutable object 305 Import statements 195 , 422–3 Increment/decrement operators 91 Index variable 311 IndexOf( ) function 323 , 334 Infi nite loops 88 , 89 Inheritance 410–13 Int( ) function 57 Integration 83–5 defi nition 85 Interaction 31 fl ow 31–2 good friends 32–4 mouse, variation with 34–8 mouse clicks and key presses 38–40 Interactive strips 155–6 Interactive Zoog 40 Intersect( ) function 170 , 174 , 184 , 185 Invisible Line of Code 35–6 IsFinished( ) function 178 IsPlaying( ) function 384 JAR fi le 26 Java 421 API, exploring 423–6 code, translation 421–3 coding outside of processing 433–5 exception (error) handling 432–3 Java classes 426 ArrayList 426–9 Rectangle 429–32 wizard, revealing 421 Java 2D 230 Java byte code 26 Java Virtual Machine 26 Jiggle( ) function 414 JiggleZoog( ) function 118 JMyron 298 Index 449
450 Index Join( ) function 325 , 326 , 327 Jump( ) function 281 Key presses 38–40 KeyPressed( ) function 39 , 93 Keywords see Reserved words Length, of array 149 Length( ) function 304 , 323 , 334 Lerp( ) function 321 Lib 396 LibCV 298 Libraries: built-in libraries 196 contributed libraries 196–8 defi nition 195 Line( ) function 24 , 104 , 195 , 227 , 260 Live video 101 , 274 LiveInput 388–90 LoadFont( ) function 307 LoadImage( ) function 254 , 255 LoadPixels( ) function 261 , 263 , 304 LoadStrings( ) function 327 , 339 Local variable 93–5 “ Logical and ” 68 Logical operators 67–9 “ Logical or ” 68 Loop( ) function 114 , 279–80 Loops 83 exit conditions 88–90 “ for ” loop 90–3 global variable 93–5 iteration 83–5 local variable 93–5 loop inside the main loop 95–7 “ while ” loop 85–8 Zoog grows arms 97–9 MakeRequest( ) 345 Mandelbrot set 216 Mathematics 201 angles 210–11 event probability, in code 205–7 modulus 202–3 oscillation 214–16 Perlin noise 207–10 probability review 204–5 and programming 201–2 random numbers 203–4 recursion 216–20 trigonometry 212–14 two-dimensional arrays 220–4 Matrix, defi nition of 241 Methods see Functions Microphone, as sound sensor 388 Millis( ) function 176 Minim library 379 , 381 Mirrors 281 Modulo operator 202–3 Mosaic 312–14 Motion detection 294–7 Mouse, variation with 34–8 Mouse clicks 38–40 MouseDragged( ) function 366 MousePressed( ) function 39 , 66 , 67 , 68 , 72 , 93 , 340 Move( ) function 109 , 179 , 193 Movie object 279–81 MovieMaker 401–3 MP3 fi les 386 Multiple rollovers 69–70 Multi-user communication 362 client 366–7 server 362–5 server and client 368 MyVar, error messages of 438–9 NetEvent( ) function 340 , 341 , 345 New PImage( ) 254 Newline character 355–6 NewTab option 128 , 129 NoFill( ) function 11 , 232 Noise( ) function 208 NoLoop( ) function 114 NoSmooth( ) function 27 NoStroke( ) function 11 NullPointerException error 127 , 440–1 Object-oriented programming (OOP) 121 , 407 encapsulation 407–9 inheritance 410–13 overloading 419 polymorphism 416–18 shapes 413–16 Object-oriented Zoog 135–7 Objects 122 arrays of 152–4 constructor arguments 131–4 cookie cutter, writing 124–5 data types 135 object-oriented Zoog 135–7 with OOP 121–2 usage 122–4 details 125–7 with tab 127–31
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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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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 466 and 467: Index AIFF (Audio Interchange File
Page 470 and 471: One-dimensional Perlin noise 208 OP
Page 472: solar system, processing 247-9 vert
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