Scale

Scale by Denis Grutze.

Paramenters for the scale() function are values specified as decimal percentages. For example, the method call scale(2.0) will increase the dimension of the shape by 200 percent. Objects always scale from the origin.

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float a = 0.0;
float s = 0.0;

void setup() {
  size(640, 360);
  noStroke();
  rectMode(CENTER);
  frameRate(30);
}

void draw() {
  
  background(102);
  
  a = a + 0.04;
  s = cos(a)*2;
  
  translate(width/2, height/2);
  scale(s); 
  fill(51);
  rect(0, 0, 50, 50); 
  
  translate(75, 0);
  fill(255);
  scale(s);
  rect(0, 0, 50, 50);       
}

Functions Used

fill()

Sets the color used to fill shapes

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size()

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

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rectMode()

Modifies the location from which rectangles are drawn by changing the way in which parameters given to rect() are intepreted

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scale()

Increases or decreases the size of a shape by expanding and contracting vertices

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setup()

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

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cos()

Calculates the cosine of an angle

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rect()

Draws a rectangle to the screen

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frameRate

The system variable frameRate contains the approximate frame rate of a running sketch

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translate()

Specifies an amount to displace objects within the display window

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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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noStroke()

Disables drawing the stroke (outline)

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background()

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

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