**float
x, y, z** |
The coordinates of the volume value. |

**float
v** |
The volume value to be plotted at the *x*, *y*, *z*
point. |

**float
vmax** |
The maximum volume value to be expected. A point plotted with this
value of volume will result in a rectangular volume that is 1/10 the size
of each axis. This should be the same for each call to **Plot4dPnt()**.
If you wish to start a second 4-D plot, you should call **Plot4dPnt()**
with *vmax* = 0.0f to renormalize the internal scaling factors. |

**int
sym** |
The symbol to be plotted in the center
of each volume. If *sym* == -1, the symbol is suppressed. |