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C Library Functions  - clear (3)

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NAME

clear(3f) - [M_pixel] clear background to current color or specified color index (LICENSE:PD)

CONTENTS

Synopsis
Description
Options
Examples
Author
License

SYNOPSIS

definition:

   subroutine clear(indx)
   integer,intent(in),optional :: indx

DESCRIPTION

Clears the screen to the current color or to color specified

OPTIONS

INDX	color index to set pixel array to. Optional

EXAMPLES

Sample program

   program demo_clear
   use :: M_pixel
   use :: M_pixel__writegif, only : writegif
   implicit none
   real,parameter :: x=400.0, y=400.0
      call prefsize(int(x), int(y)) ! set up drawing surface
      call vinit()
      call color(1)
      call linewidth(300)
      ! clear a circle and rectangle in default window and viewport
      call rect(0.0,0.0,x,y)
      call circle(x/2.0,y/2.0,x/2.0)
      ! now clear screen to current color
      call color(3)
      call clear()
      ! gif should be blank
      call writegif(’clear.3m_pixel.gif’,P_pixel,P_colormap)
      call execute_command_line(’display clear.3m_pixel.gif’)
      call vexit()
   end program demo_clear

AUTHOR

John S. Urban

LICENSE

Public Domain

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Nemo Release 3.1

clear (3)

June 29, 2025

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