Processing.py Reference. Processing is not a single programming language, but an arts-centric system for learning, teaching, and making visual form with code. This Reference documents its Python Mode.

Structure

• # (comment)
• ''' ''' (multiline comment)
• () (parentheses)
• , (comma)
• . (dot)
• : (Colon)
• = (assign)
• False
• Globals
• None
• Slice
• String Formatting
• True
• [] (Index brackets)
• add_library
• class
• def
• del
• draw()
• except
• exit()
• in
• len()
• loop()
• noLoop()
• pass
• popStyle()
• pushStyle()
• range()
• redraw()
• return
• setup()
• super
• try
• {} (Curly braces)

Environment

• cursor()
• delay()
• displayHeight
• displayWidth
• focused
• frameCount
• frameRate
• frameRate()
• fullScreen()
• height
• noCursor()
• size()
• width

Data

Primitive

• Boolean
• float
• int

Composite

• Dictionary
• Object
• Tuple
• XML
• string

Conversion

• binary()
• float()
• hex()
• int()
• list()
• str()
• unbinary()
• unhex()

Dictionary Methods

• .items()
• .iteritems()
• .keys()
• .update()
• .values()

List Methods

• .append()
• .extend()
• .index()
• .insert()
• .pop()
• .remove()
• .reverse()
• .sort()

String Methods

• .find()
• .join()
• .lower()
• .replace()
• .split()
• .startswith()
• .strip()
• .upper()

List Functions

• reversed()
• sorted()

String Functions

• match()
• matchAll()
• nf()
• nfc()
• nfp()
• nfs()

Control

Relational Operators

• != (inequality)
• < (less than)
• <= (less than or equal to)
• == (equality)
• > (greater than)
• >= (greater than or equal to)

Iteration

• for
• while

Conditionals

• Conditional Expressions
• break
• continue
• else
• if

Logical Operators

• && (logical AND)
• not (logical NOT)
• or (logical OR)

Shape

• createShape()

2D Primitives

• arc()
• circle()
• ellipse()
• line()
• point()
• quad()
• rect()
• square()
• triangle()

Curves

• bezier()
• bezierDetail()
• bezierPoint()
• bezierTangent()
• curve()
• curveDetail()
• curvePoint()
• curveTangent()
• curveTightness()

3D Primitives

• box()
• sphere()
• sphereDetail()

Attributes

• ellipseMode()
• noSmooth()
• rectMode()
• smooth()
• strokeCap()
• strokeJoin()
• strokeWeight()

Vertex

• beginContour()
• beginShape()
• bezierVertex()
• curveVertex()
• endContour()
• endShape()
• quadraticVertex()
• texture()
• textureMode()
• vertex()

Loading & Displaying

• loadShape()
• shape()
• shapeMode()

Input

Mouse

• mouseButton
• mouseClicked()
• mouseDragged()
• mouseMoved()
• mousePressed
• mousePressed()
• mouseReleased()
• mouseWheel()
• mouseX
• mouseY
• pmouseX
• pmouseY

Keyboard

• key
• keyCode
• keyPressed
• keyPressed()
• keyReleased()
• keyTyped()

Files

• createReader()
• loadBytes()
• loadStrings()
• loadXML()
• parseXML()
• selectFolder()
• selectInput()

Time & Date

• day()
• hour()
• millis()
• minute()
• month()
• second()
• year()

Output

Text Area

• print()
• println()

Image

• save()
• saveFrame()

Files

• beginRaw()
• createWriter()
• endRaw()
• saveBytes()
• saveStrings()
• saveXML()
• selectOutput()

Transform

• applyMatrix()
• popMatrix()
• printMatrix()
• pushMatrix()
• resetMatrix()
• rotate()
• rotateX()
• rotateY()
• rotateZ()
• scale()
• shearX()
• shearY()
• translate()

Lights, Camera

Lights

• ambientLight()
• directionalLight()
• lightFalloff()
• lightSpecular()
• lights()
• noLights()
• normal()
• pointLight()
• spotLight()

Camera

• beginCamera()
• camera()
• endCamera()
• frustum()
• ortho()
• perspective()
• printCamera()
• printProjection()

Coordinates

• modelX()
• modelY()
• modelZ()
• screenX()
• screenY()
• screenZ()

Material Properties

• ambient()
• emissive()
• shininess()
• specular()

Color

Setting

• background()
• clear()
• colorMode()
• fill()
• noFill()
• noStroke()
• stroke()

Creating & Reading

• alpha()
• blendColor()
• blue()
• brightness()
• color()
• green()
• hue()
• lerpColor()
• red()
• saturation()

Image

• PImage
• createImage()

Loading & Displaying

• image()
• imageMode()
• loadImage()
• noTint()
• requestImage()
• tint()

Textures

• textureWrap()

Pixels

• blend()
• copy()
• filter()
• get()
• loadPixels()
• pixels
• set()
• updatePixels()

Rendering

• PGraphics
• blendMode()
• clip()
• createGraphics()
• hint()
• noClip()

Shaders

• PShader
• loadShader()
• resetShader()
• shader()

Typography

• PFont

Loading & Displaying

• createFont()
• loadFont()
• text()
• textFont()

Attributes

• textAlign()
• textLeading()
• textMode()
• textSize()
• textWidth()

Metrics

• textAscent()
• textDescent()

Math

PVector

• PVector

Operators

• % (modulo)
• * (multiply)
• *= (multiply assign)
• + (addition)
• += (add assign)
• - (minus)
• -= (subtract assign)
• / (divide)
• /= (divide assign)

Bitwise Operators

• & (bitwise AND)
• << (left shift)
• >> (right shift)
• | (bitwise OR)

Calculation

• abs()
• ceil()
• constrain()
• dist()
• exp()
• floor()
• lerp()
• log()
• mag()
• map()
• max()
• min()
• norm()
• pow()
• round()
• sq()
• sqrt()

Trigonometry

• acos()
• asin()
• atan()
• atan2()
• cos()
• degrees()
• radians()
• sin()
• tan()

Random

• noise()
• noiseDetail()
• noiseSeed()
• random()
• randomGaussian()
• randomSeed()

Constants

• HALF_PI (1.57079...)
• PI (3.14159...)
• QUARTER_PI (0.78539...)
• TAU (6.28318...)
• TWO_PI (6.28318...)