Lights

Lights

Heaps supports real-time lighting. There are currently two types of lights supported, directional and point lights.

Enabling Lights

In order for lights to be enabled on your objects, you need to specifcy it on an object's material. You do so as follows:

myLitMesh.material.mainPass.enableLights = true;

Point Lights

Point lights are lights that are part of the environment, have a specific color and position and illuminate any materials (light enabled materials that is) around it.

To create a point light you do the following:

//Create the point light by passing it our 3d scene
var myPointLight = new h3d.scene.PointLight(s3d);
//Set the position on the light
myPointLight.x = 10;
myPointLight.y = 10;
myPointLight.z = 50;
//Set the color on the light
myPointLight.color.setColor(0xffffff);

Direction Lights

Directional lights are lights that affect every object with a light enabled material in your scene and like their name implies, emit in a specific direction. They have no position. They are comparable to the light from a source like the Sun.

The following is an example of how to create a directional light

//Create the directional light by giving it a Vector indicating the direction in which it illuminates and a reference to our 3d scene
var directionalLight = new h3d.scene.DirLight(new h3d.Vector(0.2, 0.3, -1), s3d);
//Set the color on the directional light
directionalLight.color.set(0.1, 0.1, 0.1);

Specular Lighting

Both directional and point lights support specular lighting. You can enable specular lighting on your lights with the following:

myDirectionalOrPointLight.enableSpecular = true;

Ambient lighting

Ambient lighting is a color that illuminates the entire scene with no specific direction.

You can set up ambient lighting as follows

//Set the color on the ambient light object
s3d.lightSystem.ambientLight.set(0, 0, 0);

See Also

Shadows.