The ambientMaterial() function in p5.js is used to create a ambient material for a geometry with the given color. The ambient material is used to define the color that the object reflects under any light. If the ambient material is set to reflect only red and the lights reflect only blue, then the object would not reflect any light.
Syntax:
ambientMaterial( v1, [v2], [v3] )
OR
ambientMaterial( color )
Parameters: This function accept four parameters as mentioned above and described below:
- v1: It is a number which determines the gray value, or the red or hue value relative to the current color range.
- v2: It is a number which determines the green or saturation value relative to the current color range. It is an optional parameter.
- v3: It is a number which determines the blue or brightness value relative to the current color range. It is an optional parameter.
- color: It is a p5.Color or color string which defines the color of the ambient material.
The examples below illustrates the ambientMaterial() function in p5.js:
Example 1:
let newFont; let currentLightColor = "red"; let currentAmbientColor = "red"; function preload() { newFont = loadFont('fonts/Montserrat.otf'); } function setup() { createCanvas(600, 300, WEBGL); textFont(newFont, 16); // Create a selector for selecting // the ambient material color materialColorSel = createSelect(); materialColorSel.position(30, 70); materialColorSel.option('red'); materialColorSel.option('green'); materialColorSel.option('blue'); materialColorSel.changed(() => { currentLightColor = materialColorSel.value(); }); // Create a selector for selecting // the directional light color lightColorSel = createSelect(); lightColorSel.position(30, 120); lightColorSel.option('red'); lightColorSel.option('green'); lightColorSel.option('blue'); lightColorSel.changed(() => { currentAmbientColor = lightColorSel.value(); }); } function draw() { background('white'); fill('black'); text("Select an option below to set the light " + "and ambient material color", -285, -125); text("Select directional light color", -285, -100); text("Select ambient material color", -285, -50); shininess(10); noStroke(); // Set the ambient material to the selected color ambientMaterial(currentAmbientColor); // Set the directional to the selected color directionalLight(color(currentLightColor), height / 2, width / 2, -250); // Draw the sphere translate(100, 0, 0); sphere(100); translate(-100, 0, 0); } |
Output:
Example 2:
let newFont; let currentLightColor = "yellow"; let hasRed = false; let hasGreen = false; let hasBlue = false; function preload() { newFont = loadFont('fonts/Montserrat.otf'); } function setup() { createCanvas(600, 300, WEBGL); textFont(newFont, 16); // Create 3 checkboxes for mixing 3 colors redCheckbox = createCheckbox('Red', false); redCheckbox.position(30, 70); redCheckbox.changed(() => hasRed = !hasRed); greenCheckbox = createCheckbox('Green', false); greenCheckbox.position(90, 70); greenCheckbox.changed(() => hasGreen = !hasGreen); blueCheckbox = createCheckbox('Blue', false); blueCheckbox.position(170, 70); blueCheckbox.changed(() => hasBlue = !hasBlue); // Create a selector for selecting // the directional light color lightColorSel = createSelect(); lightColorSel.position(30, 120); lightColorSel.option('yellow'); lightColorSel.option('magenta'); lightColorSel.option('cyan'); lightColorSel.changed(() => { currentLightColor = lightColorSel.value(); }); } function draw() { background('white'); fill('black'); text("Select an option below to set the light " + "and ambient material color", -285, -125); text("Select directional light color", -285, -100); text("Select ambient material color", -285, -50); shininess(10); noStroke(); // Define the color based on the checkboxes let currentAmbientColor = color(hasRed ? 255 : 0, hasGreen ? 255 : 0, hasBlue ? 255 : 0); // Set the ambient material to the defined color ambientMaterial(currentAmbientColor); // Set the directional to the selected color directionalLight(color(currentLightColor), height / 2, width / 2, -250); // Draw the sphere translate(100, 0, 0); sphere(100); translate(-100, 0, 0); } |
Output:
Online editor: https://editor.p5js.org/
Environment Setup: https://www.neveropen.co.za/p5-js-soundfile-object-installation-and-methods/
Reference: https://p5js.org/reference/#/p5/ambientMaterial
Whether you’re preparing for your first job interview or aiming to upskill in this ever-evolving tech landscape, neveropen Courses are your key to success. We provide top-quality content at affordable prices, all geared towards accelerating your growth in a time-bound manner. Join the millions we’ve already empowered, and we’re here to do the same for you. Don’t miss out – check it out now!