The surface of the 3D surface plot is illuminated in areas so that you can better see surface features. You can change the brightness of the surface, and the number and position of up to three surface lights.
You can change the surface brightness on a 3D surface plot.
Use the 3D Graph Tools toolbar to rotate the lights on a 3D surface plot.
Toolbar item | Action |
---|---|
Rotate the lights clockwise or counterclockwise about the x-axis. | |
Rotate the lights clockwise or counterclockwise about the y-axis. | |
Rotate the lights clockwise or counterclockwise about the z-axis. | |
Return the lights to their original positions. Also returns other surface lighting options, except brightness, to their original settings. |
The relative position is the position of the light relative to the center of the graph space.
The x-, y-, and z- coordinates for the positions of lights on a 3D surface plot are expressed relative to the center of the data region, which is coordinate 0 0 0. Coordinate units are designed to be consistent between x, y, and z, and are thus not related to the data measurement units.
The coordinates for these positions are:
Light | X | Y | Z |
---|---|---|---|
1 | 0 | 1 | 1 |
2 | 0 | 0 | -1 |
Light 1 is in the center of the graph space with respect to the x-axis (x = 0), but one unit in the positive direction with respect to both the y- and z-axes (y = 1 and z = 1). This gives it the appearance of being above and somewhat behind and to the right of the graph.
Light 2 is directly below the graph space, centered with respect to the x- and y-axes (x = 0 and y = 0), but one unit in the negative z direction (z = -1).
The coordinates for these positions are:
Light | X | Y | Z |
---|---|---|---|
1 | 0 | 0 | 1 |
2 | 0 | 0 | -1 |
The coordinates for these positions are:
Light | X | Y | Z |
---|---|---|---|
1 | 0 | 0 | 2 |
2 | 0 | 0 | -1 |