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World Wind is a collection of components that interactively display 3D geographic information within Java applications or applets.

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The view package contains implementations, and support for implementations of the
{@link gov.nasa.worldwind.View} interface.  It contains 2 inner packages that implement
specific view models, {@link gov.nasa.worldwind.view.orbit}, and {@link gov.nasa.worldwind.view.firstperson}.

The {@link gov.nasa.worldwind.View} interface is based on the premise that a view's position and orientation can be
defined as Position(latitude, longitude, elevation), heading, pitch, and roll.  The {@link gov.nasa.worldwind.view.ViewUtil}
class provides utility methods for:

    
        Constructing modelview matrices for use in OpenGL from this basic geocentric position/orientation.
    
    
        Constructing OpenGL projection matrices from a frustum.
    
    
        Computing position, heading, pitch, roll values from modelview matrices.
    


A {@link gov.nasa.worldwind.View} has a reference to a {@link gov.nasa.worldwind.globes.Globe}, that it gleens from the
    {@link gov.nasa.worldwind.render.DrawContext} passed to it in its {@link gov.nasa.worldwind.View#apply} method.
    A single {@link gov.nasa.worldwind.View} instance may not be used simultaneously on {@link gov.nasa.worldwind.Model}s
    with different {@link gov.nasa.worldwind.globes.Globe}s.