p5.js lerpColor() Function

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The lerpColor() function is used to interpolate two colors to find a third color between them. The amount of interpolation between the two colors can be set using the amt parameters. The color interpolation depends on the current color mode.

Syntax:

lerpColor(c1, c2, amt)

Parameters: This function accepts three parameters as mentioned above and described below:

c1: It is a p5.Color which represents the first color from which the final color will be interpolated.
c2: It is a p5.Color which represents the second color to which the final color will be interpolated.
amt: It is a number between 0 and 1 which determines which color will be used more for the interpolation. A value near 0.1 would prefer the first color more and a value near 0.9 would prefer the second color for interpolation.

Return Value: It returns a p5.Color element with the interpolated color.

The example below illustrate the lerpColor() function in p5.js:

Example:

function setup() { 
  createCanvas(500, 350); 
  textSize(18); 
    
  text("From Color", 20, 20); 
  fromColor = color("red"); 
  
  text("Lerped Color", 150, 20); 
  
  text("To Color", 300, 20); 
  toColor = color("blue"); 
    
  text("Adjust this slider to change the"+ 
             " amount of lerping", 20,  200) 
  alphaSlider = createSlider(0, 100, 50); 
  alphaSlider.position(20, 220); 
  alphaSlider.style('width', '250px'); 
} 
  
function draw() { 
  lerpedColor = lerpColor(fromColor, toColor, alphaSlider.value() / 100); 
  
  fill(fromColor); 
  rect(30, 30, 50, 100); 
  
  fill(lerpedColor); 
  rect(170, 30, 50, 100); 
  
  fill(toColor); 
  rect(310, 30, 50, 100); 
} 

Output:

Online editor: https://editor.p5js.org/

Environment Setup: https://www.zambiatek.com/p5-js-soundfile-object-installation-and-methods/

Reference: https://p5js.org/reference/#/p5/lerpColor

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