Create Image.

Create Image.

The createImage() function provides a fresh buffer of pixels to play with. This example creates an image gradient.

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PImage img;

void setup() {
  size(640, 360);  
  img = createImage(230, 230, ARGB);
  for(int i = 0; i < img.pixels.length; i++) {
    float a = map(i, 0, img.pixels.length, 255, 0);
    img.pixels[i] = color(0, 153, 204, a); 
  }
}

void draw() {
  background(0);
  image(img, 90, 80);
  image(img, mouseX-img.width/2, mouseY-img.height/2);
}

Functions Used

size()

Defines the dimension of the display window width and height in units of pixels

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map()

Re-maps a number from one range to another

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setup()

The setup() function is run once, when the program starts

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color()

Creates colors for storing in variables of the color datatype

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draw()

Called directly after setup(), the draw() function continuously executes the lines of code contained inside its block until the program is stopped or noLoop() is called

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for

Controls a sequence of repetitions

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createImage()

Creates a new PImage (the datatype for storing images)

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image()

The image() function draws an image to the display window

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background()

The background() function sets the color used for the background of the Processing window

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