void usertopix
(x_in, y_in, z_in, x_inch, y_inch) |
SVC.C |
Level
3 |

float
x_in, y_in, z_in |
The input coordinates in user units. The z_in value
is ignored in 2-D plots. |

int
*x_pix, *y_pix |
The returned pair in GraphiC pixel space. |

usertopix() takes an x, y pair (2-D plots) or
an x, y, z triplet (3-D plots) in your user units
and returns the pixel
values in the 2-D GraphiC pixel space. The function works for linear, log, and polar plots. For the latter, x is the input
radial coordinate, and y is the input angular coordinate. The
returned coordinates are in x,y space.
If the plot is rotated, the returned |