Posted: Mon Feb 25, 2008 1:15 pm Post subject: Drawing a Fractal using HPGL
Code:
report zexp_fract.
***********************************************************
* Draw a little fractal using HPGL GUI, just for fun
* Pretty old stuff
*
* This is freeware. Please read the terms of use.
* Written by Urs Rohner, Rohner IT Consulting & Engineering
*
* Contact Author: Urs Rohner
*
***********************************************************
* Selection Screen
parameters:
_lim type i default '0'.
* Globals
data:
_cnt type i,
_s1 type f, _s2 type f, _s3 type f,
_a1 type f, _a2 type f, _a3 type f,
begin of _vect occurs 9841,
c(28),
end of _vect.
* P A I ( )
start-of-selection.
move:
' 0.35' to _s1, '-0.48' to _a1,
' 0.87' to _s2, '-0.21' to _a2,
' 0.39' to _s3, ' 0.10' to _a3.
_vect-c = 'PA.....,.....PD.....,.....PU'.
append _vect.
perform t using 15 30 45 '1.1' 0.
call function 'GRAPH_HPGL' tables data = _vect.
write: / 'Number of Calls', _cnt.
form t using value(x) value(y) value(l) value(a) value(d) type i.
data:
x_ type f, y_ type f, l_ type f, a_ type f, ic type i.
add 1 to _cnt.
x_ = x + cos( a ) * l.
y_ = y + sin( a ) * l.
ic = x. _vect+2(5) = ic.
ic = y. _vect+8(5) = ic.
ic = x_. _vect+15(5) = ic.
ic = y_. _vect+21(5) = ic.
append _vect.
if d lt _lim.
add 1 to d.
l_ = l * _s1. a_ = a + _a1. perform t using x_ y_ l_ a_ d.
l_ = l * _s2. a_ = a + _a2. perform t using x_ y_ l_ a_ d.
l_ = l * _s3. a_ = a + _a3. perform t using x_ y_ l_ a_ d.
endif.
endform.
zexp_fract_screenshot.gif
Description:
This screenshot was created on a 4.5B NT R/3 System
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