This computer project contains information about the nature and location of 25 objects found in an ancient Chinese royal tomb. This tomb, which belonged to Lady Hao, one of the principal wives of a Shang emperor, was a pit filled with layers of objects separated by layers of packed earth. The three-dimensional model in the window on the right side of the window (the virtual tomb) shows the approximate location of these objects and provides links to more information about them. The three planes in the model represent layers of the tomb, while each object is shown as a flat image which always faces the viewer, no matter what angle it is seen from. You can use the navigation tools along the bottom of the window to move the whole set of layers and objects.

HOW TO USE THE MODEL

SELECTING OBJECTS AND DETERMINING OBJECT SIZE

To find out more about an object, move your cursor directly over it. The cursor will change into a circle of radiating lines. When this happens, click with the left mouse button. . This will cause several things to happen:

1. A picture of the object will appear in the window on the left side of the screen, along with a short paragraph about it, and a summary list of descriptive terms.
2. In the model itself a red square will appear around the object you clicked on. Within the red square there is a "scale ruler" made up of five red dashes. This ruler is important because the size of the objects has been standardized- they all appear to be about the same size in the virtual tomb, but in real life, they are not. To estimate the real size of the object, compare it to the ruler. For example, the ruler is as long as the object is on the vertical dimension, then the object is five centimeters tall. If it is only a third as long, then the object is three times as long, or fifteen centimeters.

• The top button indicates whether the object originated from the Shang Chinese culture or some other.
• The second (if it is there) indicates whether the object was used in religious rituals or was a perusal item.
• The third button indicates the dominant or most important material from which the object is made. Possible materials are Jade, Stone, Bronze or Bone.

As mentioned above, object you clicked is highlighted in red. If you click on one of the attribute buttons all objects that share that attribute will be highlighted with a transparent green square, including the primary object. For example, if an object made of jade is selected, a button marked "Jade" will appear. If you click on the "jade" button, all the objects made of jade will be highlighted.

Additionally, there are three buttons in the lower right, which are always there:

• XOR: When this button is clicked on, the model is in "EXCLUSIVE-OR" mode. In this mode, when you click an attribute button, the previous attribute button will go inactive. It guarantees that you are only looking at one attribute at a time.
• OR: When this button is clicked on, the model is in "OR" mode. In this case, when you click two or three attribute buttons in sequence, all objects that share at least one of those attributes will light up.
• AND: When this button is clicked on, the application is in "AND" mode. When you click two or three attribute buttons in sequence, the only objects that light up are the ones that share attributes for ALL of them.

The attribute buttons are toggles, meaning that you can turn them on and off by clicking them. You can do this in OR mode or AND mode to quickly make queries on groups or types of objects. 

NOTE: The three layers of the tomb are represented with a fine white mesh. You cannot select an object if this mesh is positioned between you and the object. Click on one of the objects that is covered by the mesh to see that this is so.

The image above, shows all objects that are both for personal use and made of Jade.