The noLights() function in p5.js is used to remove all lights in the sketch for the materials that would be rendered after this function. Any calls to light functions made after this would again re-enable the lights in the sketch.
Syntax:
noLights()
Parameters: This function does not accept any parameters.
Below examples illustrates the noLights() function in p5.js:
Example 1:
let newFont; let nolightsEnable = false ;
function preload() {
newFont = loadFont( 'fonts/Montserrat.otf' );
} function setup() {
createCanvas(600, 300, WEBGL);
textFont(newFont, 18);
nolightsEnableCheck = createCheckbox(
"Enable noLights" , false );
nolightsEnableCheck.position(20, 60);
// Toggle default light
nolightsEnableCheck.changed(() => {
nolightsEnable = !nolightsEnable;
});
} function draw() {
background( "green" );
text( "Click on the checkbox to toggle the "
+ "noLights() function." , -285, -125);
noStroke();
// Ambient light with red color
ambientLight( 'red' );
// First sphere in the sketch
translate(-100, 0, 0);
sphere(50);
translate(100, 0, 0);
// If checkbox is enabled
if (nolightsEnable) {
// Disable all lights after this
noLights();
text( "Lights disabled for second"
+ " sphere" , -285, 125);
}
else {
text( "Lights enabled for second"
+ " sphere" , -285, 125);
}
// Second sphere in the sketch
translate(100, 0, 0);
sphere(50);
} |
Output:
Example 2:
let newFont; let nolightsEnable = false ;
function preload() {
newFont = loadFont( 'fonts/Montserrat.otf' );
} function setup() {
createCanvas(600, 300, WEBGL);
textFont(newFont, 18);
nolightsEnableCheck = createCheckbox(
"Enable noLights" , false );
nolightsEnableCheck.position(20, 60);
// Toggle default light
nolightsEnableCheck.changed(() => {
nolightsEnable = !nolightsEnable;
});
} function draw() {
background( "green" );
text( "Click on the checkbox to toggle the"
+ " noLights() function." , -285, -125);
noStroke();
// Ambient light with red color
ambientLight( 'red' );
// First sphere in the sketch
translate(-100, 0, 0);
sphere(50);
translate(100, 0, 0);
// If checkbox is enabled
if (nolightsEnable) {
// Disable all lights after this
noLights();
text( "Red ambient light disabled for"
+ " second sphere" , -285, 125);
}
else {
text( "Red ambient light enabled for"
+ " second sphere" , -285, 125);
}
ambientLight( 'blue' );
// Second sphere in the sketch
translate(100, 0, 0);
sphere(50);
} |
Output:
Online editor: https://editor.p5js.org/
Environment Setup: https://www.geeksforgeeks.org/p5-js-soundfile-object-installation-and-methods/amp/
Reference: https://p5js.org/reference/#/p5/noLights