Manual Reference Pages - dl_symbol (3)
NAME
dl_symbol(3f) - [M_slices] routine to plot characters and symbols (LICENSE:PD)
CONTENTS
Synopsis
Description
SYNOPSIS
SUBROUTINE DL_SYMBOL(X,Y,S,T,A,NN,IS)
DESCRIPTION
DL_SYMBOL plots an ASCII string in a CHARACTER array. Each character (or string of characters) can be imagined as a square box with the origin at the lower left corner. The routine determines the initial position of the lower left of the first character than plots each character relative to this position. As each character is plotted the "current position" is moved to the right (along the string baseline) a fixed amount S. When the string centering option is selected, the length of the plotted string is determined and, based on the character height, the lower left corner is computed from the input (x,y) position. The special plot symbols (ASCII 0-31) are always centered about the current position.Routine to plot characters and symbols
X,Y string position. If x>998 or y>998 then plotting of the string is continued from the last DL_SYMBOL(3f) call S height of the string to be printed T character variable containing the ascii text to be plotted A angle at which the string is to be plotted counter-clockwise from x axis N number of characters to use from T note: plotting will terminate if an ASCII zero is encountered at any other position than the first character.If N<0, a plot(x,y,2) will be executed prior to plotting the first character and ABS(N) characters will be plotted.
For N<2, the plot pen is left at the 1st character origin point; otherwise it is at the end of the last plotted vector in the last plotted character.
IS centering option flag. = -3 end coordinates of string (if it were to be plotted will be returned in x,y where the input (x,y) are the lower left corner of string. This permits computation of the plotted length. However, no plotting is done and the last position variables are not changed. = -2 end coordinates of string are returned in x,y. Initial (x,y) to be lower left corner of plotted string. String is plotted. = -1 (x,y) to be lower left corner of plotted string (x and y not altered) String is plotted. = 0 (x,y) to be center of plotted string (x and y not altered) String is plotted. = 1 (x,y) to be lower right corner of plotted string (x and y not altered) String is plotted.
| dl_symbol (3) | March 11, 2021 |
