C Library Functions - hatchang (3)
NAME
hatchang(3f) - [M_draw:POLYGONS] Set the angle of the hatch lines. (LICENSE:PD)
CONTENTS
Synopsis
Description
Examples
SYNOPSIS
subroutine hatchang(angle)
real,intent(in) :: angle
DESCRIPTION
Set the angle of the hatch lines. The angle is in degrees. Zero degrees is on the negative X axis. Positive values are counterclockwise. The value is 0 at program initialization. The last value set is retained even if hatching is not active or is turned on and off.
EXAMPLES
Sample program:
program demo_hatchang use M_draw implicit none real :: b integer :: idum call prefsize(1000,200) call vinit(’ ’) b = 0.4 call page(-25.0 - b, 25.0 + b, -5.0 - b, 5.0 + b) call color(0) call clear() call textsize(0.6, 0.7) call font(’futura.l’) call centertext(.true.) call leftjustify() call linewidth(50) call polyhatch(.true.) call hatchpitch(1.0/2.0) ! draw circles with hatching call drawc(ang= 90.1, col=7, x=-20.0, label=’90 degrees’) call drawc(ang= 45.0, col=2, x=-10.0, label=’45 degrees’) call drawc(ang= 0.0, col=6, x= 0.0, label=’0 degrees’) call drawc(ang= -45.0, col=5, x= 10.0, label=’-45 degrees’) call drawc(ang= -90.0, col=4, x= 20.0, label=’-90 degrees’)call linewidth(130) call move2(0.0, 0.0) call draw2(-5.0, 0.0) call move2(-5.0, 0.0) call draw2(-4.4, 0.3) call move2(-5.0, 0.0) call draw2(-4.4, - 0.3) call rightjustify() call linewidth(60) call move2(-5.0,0.0) call drawstr(’0 degrees’) idum = getkey() call vexit() contains subroutine drawc(ang,col,x,label) real,intent(in) :: ang, x integer,intent(in) :: col character(len=*),intent(in) :: label real :: y y=0.0 call linewidth(90) call hatchang(ang) call color(col) call circle(X, Y, 5.0) y = -4.9 call move2(X - 4.9, Y) call color(7) call linewidth(60) call drawstr(label) end subroutine drawc
end program demo_hatchang
| Nemo Release 3.1 | hatchang (3) | February 23, 2025 |
