The setRed() function in p5.js is used to set the red color value in RGB color mode. It sets the first value of RGB format.
Syntax:
setRed(red)
Parameters: The function accepts single parameter as mentioned above and described below:
- red: This parameter stores the new red value.
Below programs illustrate the setRed() function in p5.js:
Example- 1: This example uses setRed() function to set red value of RGB color format.
/* declare a variable to  store the value of color*/let backgroundColor;   function setup() {     /* initialise the variable      with RGB color format*/    backgroundColor = color(0, 50, 150); }   function draw() {     // Create Canvas of a given size       createCanvas(500, 500);       // Use of setRed function     backgroundColor.setRed(       0 + 128 * cos(millis() / 1000));       /* Pass the initialized       variable to background function*/    background(backgroundColor);       // Set text size     textSize(30);       // Set text color     fill("white");       // set text     text("GeeksForGeeks", 125, 125);   } |
Output:
Example-2: This example uses setRed() function to set red value of RGB color format.
/* declare a variable to store the value of color*/let backgroundColor;   function setup() {     /* initialise the variable     with RGB color format*/    backgroundColor = color(0, 0, 0); }   function draw() {     // Create Canvas of a given size       createCanvas(540, 500);       /* Use of setRed function     and initialise it to maximum*/    backgroundColor.setRed(255);       /* Pass the initialised     variable to background function*/    background(backgroundColor);       // Set text size     textSize(30);       // Set text color     fill("white");       // set text     text("GeeksForGeeks\n ", 135, 125);     text(       "A Computer Science Portal For Geeks",       10, 155);   } |
Output:
Reference:https://p5js.org/reference/#/p5.Color/setRed
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