Reference
Shortcuts
Data
Composite
- Array
An array is a list of data
- ArrayList
An ArrayList stores a variable number of objects
- FloatDict
A simple table class to use a String as a lookup for a float value
- FloatList
Helper class for a list of floats
- HashMap
A HashMap stores a collection of objects, each referenced by a key
- IntDict
A simple class to use a String as a lookup for an int value
- IntList
Helper class for a list of ints
- JSONArray
A JSONArray is an ordered sequence of values
- JSONObject
A JSONObject is an unordered collection of name/value pairs
- Object
Objects are instances of classes
- String
A string is a sequence of characters
- StringDict
A simple class to use a String as a lookup for an String value
- StringList
Helper class for a list of Strings
- Table
Generic class for handling tabular data, typically from a CSV, TSV, or other sort of spreadsheet file
- TableRow
Represents a single row of data values, stored in columns, from a Table
- XML
This is the base class used for the Processing XML library, representing a single node of an XML tree
Array Functions
- append()
Expands an array by one element and adds data to the new position
- arrayCopy()
Copies an array (or part of an array) to another array
- concat()
Concatenates two arrays
- expand()
Increases the size of an array
- reverse()
Reverses the order of an array
- shorten()
Decreases an array by one element and returns the shortened array
- sort()
Sorts an array of numbers from smallest to largest and puts an array of words in alphabetical order
- splice()
Inserts a value or array of values into an existing array
- subset()
Extracts an array of elements from an existing array
Conversion
- binary()
Converts an int, byte, char, or color to a String containing the equivalent binary notation
- boolean()
Converts an int or String to its boolean representation
- byte()
Converts any value of a primitive data type (boolean, byte, char, color, double, float, int, or long) to its byte representation
- char()
Converts any value of a primitive data type (boolean, byte, char, color, double, float, int, or long) to its numeric character representation
- float()
Converts an int or String to its floating point representation
- hex()
Converts a byte, char, int, or color to a String containing the equivalent hexadecimal notation
- int()
Converts any value of a primitive data type (boolean, byte, char, color, float, int, or long) or String to its integer representation
- str()
Converts a value of a primitive data type (boolean, byte, char, int, or float) to its String representation
- unbinary()
Converts a String representation of a binary number to its equivalent integer value
- unhex()
Converts a String representation of a hexadecimal number to its equivalent integer value
Primitive
- boolean
Datatype for the Boolean values true and false
- byte
Datatype for bytes, 8 bits of information storing numerical values from 127 to -128
- char
Datatype for characters, typographic symbols such as A, d, and $
- color
Datatype for storing color values
- double
Datatype for floating-point numbers larger than those that can be stored in a float
- int
Datatype for integers, numbers without a decimal point
- long
Datatype for large integers
- float
Data type for floating-point numbers, e.g. numbers that have a decimal point
String Functions
- join()
Combines an array of Strings into one String, each separated by the character(s) used for the separator parameter
- matchAll()
This function is used to apply a regular expression to a piece of text
- match()
The function is used to apply a regular expression to a piece of text, and return matching groups (elements found inside parentheses) as a String array
- nf()
Utility function for formatting numbers into strings
- nfc()
Utility function for formatting numbers into strings and placing appropriate commas to mark units of 1000
- nfp()
Utility function for formatting numbers into strings
- nfs()
Utility function for formatting numbers into strings
- splitTokens()
The splitTokens() function splits a String at one or many character "tokens"
- split()
The split() function breaks a string into pieces using a character or string as the divider
- trim()
Removes whitespace characters from the beginning and end of a String
Input
Files
- BufferedReader
A BufferedReader object is used to read files line-by-line as individual String objects
- createInput()
This is a function for advanced programmers to open a Java InputStream
- createReader()
Creates a BufferedReader object that can be used to read files line-by-line as individual String objects
- launch()
Attempts to open an application or file using your platform's launcher
- loadBytes()
Reads the contents of a file or url and places it in a byte array
- loadJSONArray()
Takes a String, parses its contents, and returns a JSONArray
- loadJSONObject()
Loads a JSON from the data folder or a URL, and returns a JSONObject
- loadStrings()
Reads the contents of a file or url and creates a String array of its individual lines
- loadTable()
Reads the contents of a file or URL and creates a Table object with its values
- loadXML()
Reads the contents of a file or URL and creates an XML object with its values
- parseJSONArray()
Takes a String, parses its contents, and returns a JSONArray
- parseJSONObject()
Takes a String, parses its contents, and returns a JSONObject
- parseXML()
Converts String content to an XML object
- selectFolder()
Opens a platform-specific file chooser dialog to select a folder
- selectInput()
Open a platform-specific file chooser dialog to select a file for input
Time & Date
- day()
Returns the current day as a value from 1 to 31
- hour()
Returns the current hour as a value from 0 to 23
- minute()
Returns the current minute as a value from 0 to 59
- month()
Returns the current month as a value from 1 to 12
- second()
Returns the current second as a value from 0 to 59
- year()
Returns the current year as an integer (2003, 2004, 2005, etc)
- millis()
Returns the number of milliseconds (thousandths of a second) since the sketch started
Keyboard
- key
The system variable that always contains the value of the most recent key on the keyboard that was used (either pressed or released)
- keyCode
Used to detect special keys such as the UP, DOWN, LEFT, RIGHT arrow keys and ALT, CONTROL, SHIFT
- keyPressed
The boolean system variable that is true if any key is pressed and false if no keys are pressed
- keyPressed()
Called once every time a key is pressed
- keyReleased()
Called once every time a key is released
- keyTyped()
Called once every time a key is pressed, but action keys such as Ctrl, Shift, and Alt are ignored
Mouse
- mouseButton
Shows which mouse button is pressed
- mouseClicked()
Called once after a mouse button has been pressed and then released
- mouseDragged()
Called once every time the mouse moves and a mouse button is pressed
- mouseMoved()
Called every time the mouse moves and a mouse button is not pressed
- mousePressed
Variable storing if a mouse button is pressed
- mousePressed()
Called once after every time a mouse button is pressed
- mouseReleased()
Called every time a mouse button is released
- mouseX
The system variable that always contains the current horizontal coordinate of the mouse
- mouseWheel()
The code within the mouseWheel() event function is run when the mouse wheel is moved
- mouseY
The system variable that always contains the current vertical coordinate of the mouse
- pmouseX
The system variable that always contains the horizontal position of the mouse in the frame previous to the current frame
- pmouseY
The system variable that always contains the vertical position of the mouse in the frame previous to the current frame
Constants
- HALF_PI
HALF_PI is a mathematical constant with the value 1.57079632679489661923
- PI
PI is a mathematical constant with the value 3.14159265358979323846
- QUARTER_PI
QUARTER_PI is a mathematical constant with the value 0.7853982
- TAU
An alias for TWO_PI
- TWO_PI
TWO_PI is a mathematical constant with the value 6.28318530717958647693
Typography
- PFont
Grayscale bitmap font class used by Processing
Loading & Displaying
- createFont()
Dynamically converts a font to the format used by Processing
- loadFont()
Loads a font into a variable of type PFont
- textFont()
Sets the current font that will be drawn with the text() function
- text()
Draws text to the screen
Attributes
- textAlign()
Sets the current alignment for drawing text
- textLeading()
Sets the spacing between lines of text in units of pixels
- textMode()
Sets the way text draws to the screen
- textSize()
Sets the current font size
- textWidth()
Calculates and returns the width of any character or text string
Metrics
- textAscent()
Returns ascent of the current font at its current size
- textDescent()
Returns descent of the current font at its current size
Rendering
- PGraphics
Main graphics and rendering context, as well as the base API implementation for processing "core"
- blendMode()
Blends the pixels in the display window according to a defined mode
- clip()
Limits the rendering to the boundaries of a rectangle defined by the parameters
- createGraphics()
Creates and returns a new PGraphics object of the types P2D or P3D
- hint()
This function is used to enable or disable special features that control how graphics are drawn
- noClip()
Disables the clipping previously started by the clip() function
Shaders
- PShader
This class encapsulates a GLSL shader program, including a vertex and a fragment shader
- loadShader()
Loads a shader into the PShader object
- resetShader()
Restores the default shaders
- shader()
Applies the shader specified by the parameters
Image
- PImage
Datatype for storing images
- createImage()
Creates a new PImage (the datatype for storing images)
Pixels
- blend()
Copies a pixel or rectangle of pixels using different blending modes
- copy()
Copies the entire image
- filter()
Converts the image to grayscale or black and white
- get()
Reads the color of any pixel or grabs a rectangle of pixels
- loadPixels()
Loads the pixel data for the display window into the pixels[] array
- mask()
Masks part of an image with another image as an alpha channel
- pixels[]
Array containing the values for all the pixels in the display window
- set()
Writes a color to any pixel or writes an image into another
- updatePixels()
Updates the display window with the data in the pixels[] array
Loading & Displaying
- imageMode()
Modifies the location from which images draw
- image()
Displays images to the screen
- loadImage()
Loads an image into a variable of type PImage
- noTint()
Removes the current fill value for displaying images and reverts to displaying images with their original hues
- requestImage()
Loads images on a separate thread so that your sketch does not freeze while images load during setup()
- tint()
Sets the fill value for displaying images
Textures
- textureMode()
Sets the coordinate space for texture mapping
- textureWrap()
Defines if textures repeat or draw once within a texture map
- texture()
Sets a texture to be applied to vertex points
Shape
- PShape
Datatype for storing shapes
- createShape()
The createShape() function is used to define a new shape
- loadShape()
Loads geometry into a variable of type PShape
2d primitives
- arc()
Draws an arc in the display window
- circle()
Draws a circle to the screen
- ellipse()
Draws an ellipse (oval) in the display window
- line()
Draws a line (a direct path between two points) to the screen
- point()
Draws a point, a coordinate in space at the dimension of one pixel
- quad()
A quad is a quadrilateral, a four sided polygon
- rect()
Draws a rectangle to the screen
- square()
Draws a square to the screen
- triangle()
A triangle is a plane created by connecting three points
Vertex
- beginContour()
Begins recording vertices for the shape
- beginShape()
Using the beginShape() and endShape() functions allow creating more complex forms
- bezierVertex()
Specifies vertex coordinates for Bezier curves
- curveVertex()
Specifies vertex coordinates for curves
- endContour()
Stops recording vertices for the shape
- endShape()
the companion to beginShape() and may only be called after beginShape()
- quadraticVertex()
Specifies vertex coordinates for quadratic Bezier curves
- vertex()
All shapes are constructed by connecting a series of vertices
Curves
- bezierDetail()
Sets the resolution at which Bézier curves display
- bezierPoint()
Evaluates the Bezier at point t for points a, b, c, d
- bezierTangent()
Calculates the tangent of a point on a Bézier curve
- bezier()
Draws a Bézier curve on the screen
- curveDetail()
Sets the resolution at which curves display
- curvePoint()
Evaluates the curve at point t for points a, b, c, d
- curveTangent()
Calculates the tangent of a point on a curve
- curveTightness()
Modifies the quality of forms created with curve() and curveVertex()
- curve()
Draws a curved line on the screen
3D Primitives
- box()
A box is an extruded rectangle
- sphereDetail()
Controls the detail used to render a sphere by adjusting the number of vertices of the sphere mesh
- sphere()
A sphere is a hollow ball made from tessellated triangles
Attributes
- ellipseMode()
The origin of the ellipse is modified by the ellipseMode() function
- rectMode()
Modifies the location from which rectangles draw
- strokeCap()
Sets the style for rendering line endings
- strokeJoin()
Sets the style of the joints which connect line segments
- strokeWeight()
Sets the width of the stroke used for lines, points, and the border around shapes
Loading & Displaying
- shapeMode()
Modifies the location from which shapes draw
- shape()
Displays shapes to the screen
Math
- PVector
A class to describe a two or three dimensional vector
Trigonometry
- acos()
The inverse of cos(), returns the arc cosine of a value
- asin()
The inverse of sin(), returns the arc sine of a value
- atan2()
Calculates the angle (in radians) from a specified point to the coordinate origin as measured from the positive x-axis
- atan()
The inverse of tan(), returns the arc tangent of a value
- cos()
Calculates the cosine of an angle
- degrees()
Converts a radian measurement to its corresponding value in degrees
- radians()
Converts a degree measurement to its corresponding value in radians
- sin()
Calculates the sine of an angle
- tan()
Calculates the ratio of the sine and cosine of an angle
Calculation
- abs()
Calculates the absolute value (magnitude) of a number
- ceil()
Calculates the closest int value that is greater than or equal to the value of the parameter
- constrain()
Constrains a value to not exceed a maximum and minimum value
- dist()
Calculates the distance between two points
- exp()
Returns Euler's number e (2.71828...) raised to the power of the value parameter
- floor()
Calculates the closest int value that is less than or equal to the value of the parameter
- lerp()
Calculates a number between two numbers at a specific increment
- log()
Calculates the natural logarithm (the base-e logarithm) of a number
- mag()
Calculates the magnitude (or length) of a vector
- map()
Re-maps a number from one range to another
- max()
Determines the largest value in a sequence of numbers
- min()
Determines the smallest value in a sequence of numbers
- norm()
Normalizes a number from another range into a value between 0 and 1
- pow()
Facilitates exponential expressions
- round()
Calculates the integer closest to the value parameter
- sq()
Squares a number (multiplies a number by itself)
- sqrt()
Calculates the square root of a number
Operators
- += (add assign)
Combines addition with assignment
- + (addition)
Adds two values or concatenates string values
- -- (decrement)
Substracts the value of an integer variable by 1
- / (divide)
Divides the value of the first parameter by the value of the second parameter
- /= (divide assign)
Combines division with assignment
- ++ (increment)
Increases the value of an integer variable by 1
- - (minus)
Subtracts one value from another and may also be used to negate a value
- % (modulo)
Calculates the remainder when one number is divided by another
- * (multiply)
Multiplies the values of the two parameters
- *= (multiply assign)
Combines multiplication with assignment
- -= (subtract assign)
Combines subtraction with assignment
Bitwise Operators
- & (bitwise AND)
Compares each corresponding bit in the binary representation of the values
- | (bitwise OR)
Compares each corresponding bit in the binary representation of the values
- << (left shift)
Shifts bits to the left
- >> (right shift)
Shifts bits to the right
Random
- noiseDetail()
Adjusts the character and level of detail produced by the Perlin noise function
- noiseSeed()
Sets the seed value for noise()
- noise()
Returns the Perlin noise value at specified coordinates
- randomGaussian()
Returns a float from a random series of numbers having a mean of 0 and standard deviation of 1
- randomSeed()
Sets the seed value for random()
- random()
Generates random numbers
Output
Files
- PrintWriter
Allows characters to print to a text-output stream
- beginRaw()
To create vectors from 3D data, use the beginRaw() and endRaw() commands
- beginRecord()
Opens a new file and all subsequent drawing functions are echoed to this file as well as the display window
- createOutput()
Similar to createInput(), this creates a Java OutputStream for a given filename or path
- createWriter()
Creates a new file in the sketch folder, and a PrintWriter object to write to it
- endRaw()
Complement to beginRaw(); they must always be used together
- endRecord()
Stops the recording process started by beginRecord() and closes the file
- saveBytes()
Opposite of loadBytes(), will write an entire array of bytes to a file
- saveJSONArray()
Writes the contents of a JSONArray object to a file
- saveJSONObject()
Writes the contents of a JSONObject object to a file
- saveStream()
Save the contents of a stream to a file in the sketch folder
- saveStrings()
Writes an array of strings to a file, one line per string
- saveTable()
Writes the contents of a Table object to a file
- saveXML()
Writes the contents of an XML object to a file
- selectOutput()
Opens a platform-specific file chooser dialog to select a file for output
Text Area
- print()
Writes to the console area of the Processing environment
- println()
Writes to the text area of the Processing environment's console
- printArray()
Writes array data to the text area of the Processing environment's console
Image
- saveFrame()
Saves a numbered sequence of images, one image each time the function is run
- save()
Saves an image from the display window
Lights Camera
Lights
- ambientLight()
Adds an ambient light
- directionalLight()
Adds a directional light
- lightFalloff()
Sets the falloff rates for point lights, spotlights, and ambient lights
- lightSpecular()
Sets the specular color for lights
- lights()
Sets the default ambient light, directional light, falloff, and specular values
- noLights()
Disable all lighting
- normal()
Sets the current normal vector
- pointLight()
Adds a point light
- spotLight()
Adds a spotlight
Material Properties
- ambient()
Sets the ambient reflectance for shapes drawn to the screen
- emissive()
Sets the emissive color of the material used for drawing shapes drawn to the screen
- shininess()
Sets the amount of gloss in the surface of shapes
- specular()
Sets the specular color of the materials used for shapes drawn to the screen, which sets the color of highlights
Camera
- beginCamera()
The beginCamera() and endCamera() functions enable advanced customization of the camera space
- camera()
Sets the position of the camera
- endCamera()
The beginCamera() and endCamera() functions enable advanced customization of the camera space
- frustum()
Sets a perspective matrix defined through the parameters
- ortho()
Sets an orthographic projection and defines a parallel clipping volume
- perspective()
Sets a perspective projection applying foreshortening, making distant objects appear smaller than closer ones
- printCamera()
Prints the current camera matrix to the Console (the text window at the bottom of Processing)
- printProjection()
Prints the current projection matrix to the Console
Coordinates
- modelX()
Returns the three-dimensional X, Y, Z position in model space
- modelY()
Returns the three-dimensional X, Y, Z position in model space
- modelZ()
Returns the three-dimensional X, Y, Z position in model space
- screenX()
Takes a three-dimensional X, Y, Z position and returns the X value for where it will appear on a (two-dimensional) screen
- screenY()
Takes a three-dimensional X, Y, Z position and returns the Y value for where it will appear on a (two-dimensional) screen
- screenZ()
Takes a three-dimensional X, Y, Z position and returns the Z value for where it will appear on a (two-dimensional) screen
Color
Creating & Reading
- alpha()
Extracts the alpha value from a color
- blue()
Extracts the blue value from a color, scaled to match current colorMode()
- brightness()
Extracts the brightness value from a color
- color()
Creates colors for storing in variables of the color datatype
- green()
Extracts the green value from a color, scaled to match current colorMode()
- hue()
Extracts the hue value from a color
- lerpColor()
Calculates a color or colors between two colors at a specific increment
- red()
Extracts the red value from a color, scaled to match current colorMode()
- saturation()
Extracts the saturation value from a color
Setting
- background()
Sets the color used for the background of the Processing window
- clear()
Clears the pixels within a buffer
- colorMode()
Changes the way Processing interprets color data
- fill()
Sets the color used to fill shapes
- noFill()
Disables filling geometry
- noStroke()
Disables drawing the stroke (outline)
- stroke()
Sets the color used to draw lines and borders around shapes
Transform
- applyMatrix()
Multiplies the current matrix by the one specified in the parameter
- popMatrix()
Pops the current transformation matrix off the matrix stack
- printMatrix()
Prints the current matrix to the Console (the text window at the bottom of Processing)
- pushMatrix()
Pushes the current transformation matrix onto the matrix stack
- resetMatrix()
Replaces the current matrix with the identity matrix
- rotateX()
Rotates a shape around the x-axis the amount specified by the angle parameter
- rotateY()
Rotates a shape around the y-axis the amount specified by the angle parameter
- rotateZ()
Rotates a shape around the z-axis the amount specified by the angle parameter
- rotate()
Rotates a shape the amount specified by the angle parameter
- scale()
Increases or decreases the size of a shape by expanding and contracting vertices
- shearX()
Shears a shape around the x-axis the amount specified by the angle parameter
- shearY()
Shears a shape around the y-axis the amount specified by the angle parameter
- translate()
Specifies an amount to displace objects within the display window
Structure
- [] (array access)
The array access operator is used to specify a location within an array
- = (assign)
Assigns a value to a variable
- catch
The catch keyword is used with try to handle exceptions
- class
Keyword used to indicate the declaration of a class
- , (comma)
Separates parameters in function calls and elements during assignment
- // (comment)
Explanatory notes embedded within the code
- {} (curly braces)
Define the beginning and end of functions blocks and statement blocks such as the for and if structures
- /** */ (doc comment)
Explanatory notes embedded within the code
- . (dot)
Provides access to an object's methods and data
- draw()
Called directly after setup() and continuously executes the lines of code contained inside its block until the program is stopped or noLoop() is called
- exit()
Quits/stops/exits the program
- extends
Allows a new class to inherit the methods and data fields (variables and constants) from an existing class
- false
Reserved word representing the logical value "false"
- final
Keyword used to state that a value, class, or method can't be changed
- implements
Implements an interface or group of interfaces
- import
The keyword import is used to load a library into a Processing sketch
- loop()
Causes Processing to continuously execute the code within draw()
- /* */ (multiline comment)
Explanatory notes embedded within the code
- new
Creates a "new" object
- noLoop()
Stops Processing from continuously executing the code within draw()
- null
Special value used to signify the target is not a valid data element
- () (parentheses)
Grouping and containing expressions and parameters
- popStyle()
Saves the current style settings and popStyle() restores the prior settings
- pop()
The pop() function restores the previous drawing style settings and transformations after push() has changed them
- private
This keyword is used to disallow other classes access to the fields and methods within a class
- public
Keyword used to provide other classes access the fields and methods within a class
- pushStyle()
Saves the current style settings and popStyle() restores the prior settings
- push()
The push() function saves the current drawing style settings and transformations, while pop() restores these settings
- redraw()
Executes the code within draw() one time
- return
Keyword used to indicate the value to return from a function
- ; (semicolon)
A statement terminator which separates elements of the program
- setLocation()
The setLocation() function defines the position of the Processing sketch in relation to the upper-left corner of the computer screen
- setResizable()
By default, Processing sketches can't be resized
- setTitle()
The setTitle() function defines the title to appear at the top of the sketch window
- setup()
The setup() function is called once when the program starts
- static
Keyword used to define a variable as a "class variable" and a method as a "class method
- super
Keyword used to reference the superclass of a subclass
- this
Refers to the current object (i
- thread()
Launch a new thread and call the specified function from that new thread
- true
Reserved word representing the logical value "true"
- try
The try keyword is used with catch to handle exceptions
- void
Keyword used to indicate that a function returns no value
Control
Conditionals
- break
Ends the execution of a structure such as switch, for, or while and jumps to the next statement after
- case
Denotes the different names to be evaluated with the parameter in the switch structure
- ?: (conditional)
A shortcut for writing an if and else structure
- continue
When run inside of a for or while, it skips the remainder of the block and starts the next iteration
- default
Keyword for defining the default condition of a switch
- else
Extends the if structure allowing the program to choose between two or more blocks of code
- if
Allows the program to make a decision about which code to execute
- switch
Works like an if else structure, but switch is more convenient when you need to select between three or more alternatives
Relational Operators
- == (equality)
Determines if two values are equivalent
- > (greater than)
Tests if the value on the left is larger than the value on the right
- >= (greater than or equal to)
Tests if the value on the left is larger than the value on the right or if the values are equivalent
- != (inequality)
Determines if one expression is not equivalent to another
- < (less than)
Tests if the value on the left is smaller than the value on the right
- <= (less than or equal to)
Tests if the value on the left is less than the value on the right or if the values are equivalent
Logical Operators
- && (logical AND)
Compares two expressions and returns true only if both evaluate to true
- ! (logical NOT)
Inverts the Boolean value of an expression
- || (logical OR)
Compares two expressions and returns true if one or both evaluate to true
Environment
- cursor()
Sets the cursor to a predefined symbol, an image, or makes it visible if already hidden
- delay()
The delay() function causes the program to halt for a specified time
- focused
Confirms if a Processing program is "focused"
- frameCount
The system variable that contains the number of frames displayed since the program started
- frameRate
The system variable that contains the approximate frame rate of the software as it executes
- frameRate()
Specifies the number of frames to be displayed every second
- fullScreen()
Opens a sketch using the full size of the computer's display
- height
System variable which stores the height of the display window
- noCursor()
Hides the cursor from view
- noSmooth()
Draws all geometry and fonts with jagged (aliased) edges and images with hard edges between the pixels when enlarged rather than interpolating pixels
- pixelDensity()
It makes it possible for Processing to render using all the pixels on high resolutions screens
- pixelHeight
The actual pixel height when using high resolution display
- pixelWidth
The actual pixel width when using high resolution display
- settings()
Used when absolutely necessary to define the parameters to size() with a variable
- size()
Defines the dimension of the display window in units of pixels
- smooth()
Draws all geometry with smooth (anti-aliased) edges
- width
System variable which stores the width of the display window
- windowMove()
The windowMove() function defines the position of the Processing sketch in relation to the upper-left corner of the computer screen
- windowMoved()
Called every time the sketch window is moved
- windowRatio()
Scale the sketch as if it fit a specific width and height
- windowResizable()
Define whether the sketch window can be resized while it's running
- windowResize()
The windowResize() function defines the size of the sketch window
- windowResized()
Called every time the sketch window is resized
- windowTitle()
The windowTitle() function defines the title to appear at the top of the sketch window
- displayWidth
Variable that stores the width of the computer screen
- displayDensity()
Returns "2" if the screen is high-density and "1" if not
- displayHeight
Variable that stores the height of the computer screen