What types of lights are supported in Babylon.js?

Babylon.js - Interview Questions

1. HemisphericLight : Represents a light source positioned infinitely far away, simulating a distant hemisphere of light. It's commonly used to simulate ambient lighting.

var hemisphericLight = new BABYLON.HemisphericLight("hemisphericLight", new BABYLON.Vector3(0, 1, 0), scene);?

2. DirectionalLight : Represents a light source with parallel rays, similar to sunlight. It provides directional illumination across the entire scene.

var directionalLight = new BABYLON.DirectionalLight("directionalLight", new BABYLON.Vector3(0, -1, 0), scene);?

3. PointLight : Represents a light source emanating from a specific point in space in all directions. It is often used to simulate point sources like light bulbs.

var pointLight = new BABYLON.PointLight("pointLight", new BABYLON.Vector3(0, 5, 0), scene);?

4. SpotLight : Represents a light source with a cone-shaped beam. It is useful for simulating focused light, such as a flashlight or a spotlight on a stage.

var spotLight = new BABYLON.SpotLight("spotLight", new BABYLON.Vector3(0, 5, 0), new BABYLON.Vector3(0, -1, 0), Math.PI / 4, 2, scene);?

5. AreaLight : Represents a light source with a rectangular or disc-shaped shape. It is useful for simulating larger light sources and creating soft shadows.

var areaLight = new BABYLON.AreaLight("areaLight", new BABYLON.Vector3(0, 5, 0), new BABYLON.Vector3(0, -1, 0), Math.PI / 2, 2, scene);?

6. Scene Lights : Lights can also be added directly to the scene without specific types, allowing for more custom lighting scenarios.

Example of Using Lights :

// Create a directional light
var directionalLight = new BABYLON.DirectionalLight("directionalLight", new BABYLON.Vector3(0, -1, 0), scene);
directionalLight.intensity = 0.7; // Set light intensity

// Create a point light
var pointLight = new BABYLON.PointLight("pointLight", new BABYLON.Vector3(0, 5, 0), scene);
pointLight.diffuse = new BABYLON.Color3(1, 0, 0); // Set light color

// Create a spot light
var spotLight = new BABYLON.SpotLight("spotLight", new BABYLON.Vector3(0, 5, 0), new BABYLON.Vector3(0, -1, 0), Math.PI / 4, 2, scene);?

In this example, different types of lights are created and customized. They can be positioned, oriented, and adjusted to achieve the desired lighting effects in the scene. Light properties, such as intensity, color, and range, can be modified to control their impact on the overall visual presentation.