book

Make: Getting Started with Processing, 2nd Edition

by Casey Reas, Ben Fry

September 2015

Beginner

238 pages

4h 2m

English

Make: Community

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Preface
How This Book Is OrganizedWho This Book Is ForConventions Used in This BookUsing Code ExamplesSafari® Books OnlineHow to Contact UsAcknowledgments
1. Hello
Sketching and PrototypingFlexibilityGiantsFamily TreeJoin In
2. Starting to Code
Your First ProgramExample 2-1: Draw an EllipseExample 2-2: Make CirclesShowSave and NewShareExamples and Reference
3. Draw
The Display WindowExample 3-1: Draw a WindowExample 3-2: Draw a PointBasic ShapesExample 3-3: Draw a LineExample 3-4: Draw Basic ShapesExample 3-5: Draw a RectangleExample 3-6: Draw an EllipseExample 3-7: Draw Part of an EllipseExample 3-8: Draw with DegreesDrawing OrderExample 3-9: Control Your Drawing OrderExample 3-10: Put It in ReverseShape PropertiesExample 3-11: Set Stroke WeightExample 3-12: Set Stroke CapsExample 3-13: Set Stroke JoinsDrawing ModesExample 3-14: On the CornerColorExample 3-15: Paint with GraysExample 3-16: Control Fill and StrokeExample 3-17: Draw with ColorExample 3-18: Set TransparencyCustom ShapesExample 3-19: Draw an ArrowExample 3-20: Close the GapExample 3-21: Create Some CreaturesCommentsRobot 1: Draw
4. Variables
First VariablesExample 4-1: Reuse the Same ValuesExample 4-2: Change ValuesMaking VariablesProcessing VariablesExample 4-3: Adjust the Size, See What FollowsA Little MathExample 4-4: Basic ArithmeticRepetitionExample 4-5: Do the Same Thing Over and OverExample 4-6: Use a for LoopExample 4-7: Flex Your for Loop’s MusclesExample 4-8: Fanning Out the LinesExample 4-9: Kinking the LinesExample 4-10: Embed One for Loop in AnotherExample 4-11: Rows and ColumnsExample 4-12: Pins and LinesExample 4-13: Halftone DotsRobot 2: Variables
5. Response
Once and ForeverExample 5-1: The draw() FunctionExample 5-2: The setup() FunctionExample 5-3: Global VariableFollowExample 5-4: Track the MouseExample 5-5: The Dot Follows YouExample 5-6: Draw ContinuouslyExample 5-7: Set Line ThicknessExample 5-8: Easing Does ItExample 5-9: Smooth Lines with EasingClickExample 5-10: Click the MouseExample 5-11: Detect When Not ClickedExample 5-12: Multiple Mouse ButtonsLocationExample 5-13: Find the CursorExample 5-14: The Bounds of a CircleExample 5-15: The Bounds of a RectangleTypeExample 5-16: Tap a KeyExample 5-17: Draw Some LettersExample 5-18: Check for Specific KeysExample 5-19: Move with Arrow KeysMapExample 5-20: Map Values to a RangeExample 5-21: Map with the map() FunctionRobot 3: Response
6. Translate, Rotate, Scale
TranslateExample 6-1: Translating LocationExample 6-2: Multiple TranslationsRotateExample 6-3: Corner RotationExample 6-4: Center RotationExample 6-5: Translation, then RotationExample 6-6: Rotation, Then TranslationExample 6-7: An Articulating ArmScaleExample 6-8: ScalingExample 6-9: Keeping Strokes ConsistentPush and PopExample 6-10: Isolating TransformationsRobot 4: Translate, Rotate, Scale
7. Media
ImagesExample 7-1: Load an ImageExample 7-2: Load More ImagesExample 7-3: Mousing Around with ImagesExample 7-4: Transparency with a GIFExample 7-5: Transparency with a PNGFontsExample 7-6: Drawing with FontsExample 7-7: Draw Text in a BoxExample 7-8: Store Text in a StringShapesExample 7-9: Draw with ShapesExample 7-10: Scaling ShapesExample 7-11: Creating a New ShapeRobot 5: Media
8. Motion
FramesExample 8-1: See the Frame RateExample 8-2: Set the Frame RateSpeed and DirectionExample 8-3: Move a ShapeExample 8-4: Wrap AroundExample 8-5: Bounce Off the WallTweeningExample 8-6: Calculate Tween PositionsRandomExample 8-7: Generate Random ValuesExample 8-8: Draw RandomlyExample 8-9: Move Shapes RandomlyTimersExample 8-10: Time PassesExample 8-11: Triggering Timed EventsCircularExample 8-12: Sine Wave ValuesExample 8-13: Sine Wave MovementExample 8-14: Circular MotionExample 8-15: SpiralsRobot 6: Motion
9. Functions
Function BasicsExample 9-1: Roll the DiceExample 9-2: Another Way to RollMake a FunctionExample 9-3: Draw the OwlExample 9-4: Two’s CompanyExample 9-5: An Owl FunctionExample 9-6: Increasing the Surplus PopulationExample 9-7: Owls of Different SizesReturn ValuesExample 9-8: Return a ValueRobot 7: Functions

10. Objects
Fields and MethodsDefine a ClassCreate ObjectsExample 10-1: Make an ObjectExample 10-2: Make Multiple ObjectsTabsRobot 8: Objects
11. Arrays
From Variables to ArraysExample 11-1: Many VariablesExample 11-2: Too Many VariablesExample 11-3: Arrays, Not VariablesMake an ArrayExample 11-4: Declare and Assign an ArrayExample 11-5: Compact Array AssignmentExample 11-6: Assigning to an Array in One GoExample 11-7: Revisiting the First ExampleRepetition and ArraysExample 11-8: Filling an Array in a for LoopExample 11-9: Track Mouse MovementsArrays of ObjectsExample 11-10: Managing Many ObjectsExample 11-11: A New Way to Manage ObjectsExample 11-12: Sequences of ImagesRobot 9: Arrays
12. Data
Data SummaryTablesExample 12-1: Read the TableExample 12-2: Draw the TableExample 12-3: 29,740 CitiesJSONExample 12-4: Read a JSON FileExample 12-5: Visualize Data from a JSON FileNetwork Data and APIsExample 12-6: Parsing the Weather DataExample 12-7: Chaining MethodsRobot 10: Data
13. Extend
SoundExample 13-1: Play a SampleExample 13-2: Listen to a MicrophoneExample 13-3: Create a Sine WaveImage and PDF ExportExample 13-4: Saving ImagesExample 13-5: Draw to a PDFHello, ArduinoExample 13-6: Read a SensorExample 13-7: Read Data from the Serial PortExample 13-8: Visualizing the Data StreamExample 13-9: Another Way to Look at the Data
A. Coding Tips
Functions and ParametersColor CodingCommentsUppercase and LowercaseStyleConsoleOne Step at a Time
B. Data Types
C. Order of Operations
D. Variable Scope
Index

Content preview from Make: Getting Started with Processing, 2nd Edition

Chapter 8. Motion

Like a flip book, animation on screen is created by drawing an image, then drawing a slightly different image, then another, and so on. The illusion of fluid motion is created by persistence of vision. When a set of similar images is presented at a fast enough rate, our brains translate these images into motion.

Frames

To create smooth motion, Processing tries to run the code inside draw() at 60 frames each second. A frame is one trip through the draw() and the frame rate is how many frames are drawn each second. Therefore, a program that draws 60 frames each second means the program runs the entire code inside draw() 60 times each second.

Example 8-1: See the Frame Rate

To confirm the frame rate, run this program and watch ...

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