Scene bundle

The scene bundle provides information on how the light travels through the atmosphere. That is, whether there is a fog or haze-like presence in the atmosphere to effect the way light is reflected by the 3-D graphics. Fog and haze make light seem whiter, and pollution makes light seem yellow or gray.

The scene bundle provides information on the camera that includes specifications for the camera position, angle, height, and projection alogorithm in use to project the 3-D points of the graphic to the 2-D scene.

Projection is the means by which the information in the scene is organized and projected as an image onto the scene. The camera provides a parallel and a perspective camera projection. Both methods project fully-focused 3-D graphics to the 2-D scene.

• Perspective projection works like a real-world camera to make objects closer to the viewpoint appear larger than objects farther away.
• Parallel projection makes all objects appear the same size regardless of where they are with respect to the viewpoint.