XYZ Format: Allows the input of XYZ or XY curves into
SolidMesh. The format for the files is simply an ascii file that contains
any number of curves. Each curve is defined by an integer number of points
in the curve, followed by each point on a separate line:
| XYZ: | XY: |
| NumPointsInCurve | NumPointsInCurve |
| P1.x P1.y P1.z | P1.x P1.y |
| P2.x P2.y P2.z | P2.x P2.y |
| P3.x P3.y P3.z | P3.x P3.y |
| . | . |
| . | . |
| . | . |
| PN.x PN.y PN.z | PN.x PN.y |
| NumPointsInCurve | NumPointsInCurve |
| P1.x P1.y P1.z | P1.x P1.y |
| P2.x P2.y P2.z | P2.x P2.y |
| P3.x P3.y P3.z | P3.x P3.y |
| . | . |
| . | . |
| . | . |
| PN.x PN.y PN.z | PN.x PN.y PN.z |
| . | . |
| . | . |
| . | . |