3-D Visualization

Light Objects

You create a light object using the light function. Three important light object properties are

• Color -- Color of the light cast by the light object
• Style -- Either infinitely far away (the default) or local
• Position -- Direction (for infinite light sources) or the location (for local light sources)

The Color property determines the color of the directional light from the light source. The color of an object in a scene is determined by the color of the object and the light source.

The Style property determines whether the light source is a point source (Style set to local), which radiates from the specified position in all directions, or a light source placed at infinity (Style set to infinite), which shines from the direction of the specified position with parallel rays.

The Position property specifies the location of the light source in axes data units. In the case of a light source at infinity, Position specifies the direction to the light source.

Lights affect surface and patch objects that are in the same axes as the light. These objects have a number of properties that alter the way they look when illuminated by lights.

Lighting Commands

Adding Lights to a Scene

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