1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
|
PACKET at plot DEFINES (* at plot *)
(* Datum : 14:05:86 *)
begin plot, (* Geaendert: 30.05:86 *)
end plot, (* Autoren : BJ & CW *)
clear, (* MPG Bielefeld *)
pen,
background,
foreground,
thickness,
linetype,
move,
draw,
bar, circle,
drawing area,
range, set range:
LET max x = 719,
max y = 347,
x pixel = 720,
y pixel = 348,
x cm = 24.5,
y cm = 18.5;
INT VAR thick :: 0, (* Normale Linien *)
ltype :: 1,
x max :: max x, (* Zeichenfenster *)
y max :: max y,
x min :: 0,
y min :: 0,
old x :: 0,
old y :: 0;
ROW 5 ROW 4 INT CONST nibble :: ROW 5 ROW 4 INT: (* Bitmuster fuer Linien*)
(ROW 4 INT : ( 4369, 4369, 4369, 4369), (* durchgezogen *)
ROW 4 INT : ( 17, 17, 17, 17), (* gepunktet *)
ROW 4 INT : ( 4369, 0, 4369, 0), (* kurz gestrichelt *)
ROW 4 INT : ( 4369, 4369, 0, 0), (* lang gestrichelt *)
ROW 4 INT : ( 4369, 4369, 4096, 1)); (* gestrichpunktet *)
PROC begin plot:
INT VAR return;
REP (* Fehler? Ab und zu versagt der *)
control (-5,512+0,0,return); (* Graphik-Aufruf !!!!!! *)
UNTIL return <> -1 PER;
IF return <> 0
THEN errorstop ("Graphik nicht ansprechbar")
FI
END PROC begin plot;
PROC end plot:
INT VAR return;
pause;
control (-5,2,0,return);
END PROC end plot;
PROC clear:
begin plot
END PROC clear;
PROC pen (INT CONST backgr, foregr, thickn, linety):
INT VAR dummy;
background (backgr, dummy);
thickness (thickn, dummy);
linetype (linety, dummy);
foreground (foregr, dummy)
END PROC pen;
PROC background (INT CONST desired, INT VAR realized):
realized := 0
END PROC background;
PROC foreground (INT CONST desired, INT VAR realized):
IF desired < 2 OR desired = 5 (* 0 = loeschen, 1 = setzen, 5 = schwarz *)
THEN realized := desired
ELSE realized := 1
FI;
IF realized = 0
THEN INT VAR return;
control ( -9,0,0,return);
control (-10,0,0,return)
ELSE linetype (ltype,return) (* Alten Typ wiederherstellen *)
FI
END PROC foreground;
PROC linetype (INT CONST desired, INT VAR realized):
IF desired > 5
THEN realized := 1
ELSE realized := desired
FI;
INT VAR return;
ltype := realized;
control ( -9,nibble [realized][2], nibble [realized][1], return);
control (-10,nibble [realized][4], nibble [realized][3], return);
IF realized = 1
THEN control (-11,0,0,return)
ELSE control (-11,1,0,return)
FI
END PROC linetype;
PROC thickness (INT CONST desired, INT VAR realized):
thick := int ( real (desired) / 200.0 * (* Angabe in 1/10 mm *)
real (x pixel) / x cm); (* Unrechnung in X Punkte *)
realized := thick * 2 + 1 (* Rueckgabe in Punkten *)
END PROC thickness;
PROC move (INT CONST x,y):
old x := x; (* Kein direktes move, da clipping ! *)
old y := y
END PROC move;
PROC draw (INT CONST x,y):
draw (old x,old y,x,y);
END PROC draw;
PROC draw (INT CONST x0,y0,x1,y1):
IF thick = 0
THEN line (x0,y0,x1,y1)
ELSE draw thick line (x0,y0,x1,y1)
FI;
move (x1,y1)
END PROC draw;
PROC draw thick line (INT CONST x1,y1,x2,y2):
INT VAR x0 :: x1,
y0 :: y1,
x :: x2,
y :: y2;
swap if neccessary;
REAL VAR xr0 :: real(x0), (* Unwandlung in *)
yr0 :: real(y0) / (x cm * real(y pixel)) * (* 1:1-Koordinaten*)
(y cm * real(x pixel)),
xr1 :: real(x),
yr1 :: real(y) / (x cm * real(y pixel)) *
(y cm * real(x pixel));
INT VAR line counter;
control(-11,1,0,line counter);
IF is vertical line
THEN draw vertical line
ELSE draw line
FI;
move(x1,y1).
swap if neccessary:
IF x < x0 OR (x = x0 AND y < y0)
THEN INT VAR dummy :: x0;
x0 := x;
x := dummy;
dummy := y0;
y0 := y;
y := dummy
FI.
is vertical line:
x = x0.
draw vertical line:
INT VAR i;
FOR i FROM - thick UPTO thick REP
INT VAR return;
control(-11, 1,line counter,return); (* Einheitliches Muster ! *)
line (xr0+real(i),yr0-real(thick),xr0+real(i),yr1+real(thick))
PER.
draw line:
REAL VAR m :: (yr1 - yr0) / (xr1 - xr0),
dx :: real(thick)/sqrt(1.0+m**2),
dy :: m * dx,
xn,
yn,
diff,
dsx :: dy,
dsy :: -dx,
x incr :: -real(sign(dsx)),
y incr :: -real(sign(dsy));
xr0 INCR -dx;
yr0 INCR -dy;
xr1 INCR dx;
yr1 INCR dy;
xn := xr0 + dsx;
yn := yr0 + dsy;
REP
control (-11, 1,line counter,return);
line(xn,yn,xr1 - xr0 + xn,yr1 - yr0 + yn);
diff := (2.0*dsy *(xn - (xr0 - dy)) - 2.0 * dsx * (yn - (yr0 + dx)))
* real(sign(m));
IF diff < 0.0
THEN xn INCR x incr
ELIF diff > 0.0
THEN yn INCR y incr
ELSE xn INCR x incr;
yn INCR y incr
FI
UNTIL int(xn - xr0 + dy) = 0 AND int(yn - yr0 - dx) = 0 PER
END PROC draw thick line;
PROC line (REAL CONST x0,y0,x1,y1): (* 1:1-Koordinaten -> Geraetek. *)
line (int(x0),int(y0 * (x cm * real(y pixel)) / (y cm * real(x pixel))),
int(x1),int(y1 * (x cm * real(y pixel)) / (y cm * real(x pixel))))
END PROC line ;
PROC line (INT CONST x0,y0,x1,y1): (* Normale Linie mit clipping *)
REAL VAR dx :: real(xmax - xmin) / 2.0,
dy :: real(ymax - ymin) / 2.0,
rx0 :: real(x0-x min) - dx,
ry0 :: real(y0-y min) - dy,
rx1 :: real(x1-x min) - dx,
ry1 :: real(y1-y min) - dy;
INT VAR cx0,
cy0,
cx1,
cy1;
calculate cells;
IF (cx0*cx1 = 1) OR (cy0 * cy1 = 1)
THEN (* Linie ausserhalb *)
ELSE do clipping
FI.
do clipping:
IF cx0 <> 0
THEN REAL VAR next x :: real(cx0) * dx;
ry0 := (ry1 - ry0) / (rx1 - rx0) * (next x - rx0) + ry0;
rx0 := next x
FI;
calculate cells;
IF cy0 <> 0
THEN REAL VAR next y :: real(cy0) * dy;
rx0 := (rx1 - rx0) / (ry1 - ry0) * (next y - ry0) + rx0;
ry0 := next y
FI;
IF cx1 <> 0
THEN next x := real(cx1) * dx;
ry1 := (ry1 - ry0) / (rx1 - rx0) * (next x - rx1) + ry1;
rx1 := next x
FI;
calculate cells;
IF cy1 <> 0
THEN next y := real(cy1) * dy;
rx1 := (rx1 - rx0) / (ry1 - ry0) * (next y - ry1) + rx1;
ry1 := next y
FI;
IF (rx1 = rx0) AND (ry1 = ry0)
THEN LEAVE line
FI;
draw std line (int (rx0+dx) + x min,int (ry0+dy) + y min,
int (rx1+dx) + x min,int (ry1+dy) + y min).
calculate cells:
cx0 := 0;
cy0 := 0;
cx1 := 0;
cy1 := 0;
IF abs(rx0) > dx
THEN cx0 := sign(rx0)
FI;
IF abs(rx1) > dx
THEN cx1 := sign(rx1)
FI;
IF abs(ry0) > dy
THEN cy0 := sign(ry0)
FI;
IF abs(ry1) > dy
THEN cy1 := sign(ry1)
FI
END PROC line;
PROC draw std line (INT CONST x0,y0,x1,y1): (* Terminallinie ziehen *)
INT VAR return;
control(-7,x0,max y - y0,return); (* move *)
control(-6,x1,max y - y1,return) (* draw *)
END PROC draw std line;
PROC drawing area (REAL VAR x c, y c, INT VAR x pix, y pix):
x pix := x pixel;
y pix := y pixel;
x c := x cm;
y c := y cm
END PROC drawing area;
PROC range (INT CONST hmin,hmax,vmin,vmax): (* Zeichenflaeche setzen *)
x min := max (0, min (max x,h min));
x max := max (0, min (max x,h max));
y min := max (0, min (max y,v min));
y max := max (0, min (max y,v max))
END PROC range;
PROC set range ( INT CONST hmin, hmax, vmin, vmax):
range( hmin, hmax, vmin, vmax )
ENDPROC set range;
(* Textausgabe von C. Indenbirken *)
(* Erweitert um stufenlose Rotierbarkeit der Zeichen *)
LET ZEICHENSATZ = ROW 255 TEXT;
ZEICHENSATZ VAR zeichen;
INT CONST char x :: 6, char y :: 10;
zeichensatz ("ZEICHENSATZ");
PROC zeichensatz (TEXT CONST name):
IF exists (name)
THEN BOUND ZEICHENSATZ VAR new zeichen :: old (name);
zeichen := new zeichen;
ELSE errorstop ("Der Zeichensatz """ + name + """ existiert nicht") FI
END PROC zeichensatz;
PROC draw char (INT CONST char no,REAL CONST x, y,REAL CONST x size,
y size, direction):
TEXT CONST character :: zeichen [char no];
INT VAR n :: 1, x0, y0, x1, y1;
INT CONST len :: length (character);
REAL CONST sindir :: sind(direction),
cosdir :: cosd(direction);
WHILE n < len
REP value (character, n, x0, y0, x1, y1);
REAL VAR xr0 :: real(x0),
yr0 :: real(y0),
xr1 :: real(x1),
yr1 :: real(y1);
transform (xr0, yr0, x, y, x size, y size, sindir,cosdir);
transform (xr1, yr1, x, y, x size, y size, sindir,cosdir);
draw (int(xr0),int(yr0 * (x cm * real(y pixel)) /
(y cm * real(x pixel))),
int(xr1),int(yr1 * (x cm * real(y pixel)) /
(y cm * real(x pixel))));
n INCR 4
PER .
END PROC draw char;
PROC value (TEXT CONST char, INT CONST n, INT VAR x0, y0, x1, y1):
x0 := val (code (char SUB n)); y0 := val (code (char SUB n+1));
x1 := val (code (char SUB n+2)); y1 := val (code (char SUB n+3));
END PROC value;
INT PROC val (INT CONST n):
IF n > 127
THEN -256 OR n
ELSE n FI
END PROC val;
PROC transform (REAL VAR x, y,REAL CONST x0, y0,REAL CONST x size, y size,
sindir,cosdir):
REAL CONST old x :: x, old y :: y;
REAL CONST dx :: x size / real(char x) * old x * cosdir -
y size / real(char y) * old y * sindir,
dy :: y size / real(char y) * old y * cosdir +
x size / real(char x) * old x * sindir;
x := x0 + dx;
y := y0 + dy
END PROC transform;
PROC draw text (REAL CONST x pos, y pos,TEXT CONST msg, REAL CONST angle,
REAL CONST height, width):
INT VAR i;
REAL VAR x :: x pos, y :: y pos,
x step :: cosd (angle)*width,
y step :: sind (angle)*width;
FOR i FROM 1 UPTO length (msg)
REP IF control char
THEN execute control char
ELSE execute normal char FI
PER .
control char:
akt char < ""32"" .
execute control char:
SELECT code (akt char) OF
CASE 1: home
CASE 2: right
CASE 3: up
CASE 7: out (""7"")
CASE 8: left
CASE 10: down
CASE 13: return
ENDSELECT .
home:
x := x pos;
y := y pos .
right:
x INCR x step; y INCR y step .
up:
x INCR y step; y INCR x step .
left:
x DECR x step; y DECR y step .
down:
x DECR y step; y DECR x step .
return:
x := x pos .
execute normal char:
draw char (code (akt char), x, y, height, width,
angle);
x INCR x step;
y INCR y step .
akt char:
msg SUB i .
END PROC draw text;
PROC draw (TEXT CONST msg):
draw (msg,0.0,5.0,5.0)
END PROC draw;
PROC draw (TEXT CONST msg,REAL CONST angle,REAL CONST heigth,width):
REAL CONST xr :: real(old x),
yr :: real(old y) / (x cm * real(y pixel)) *
(y cm * real(x pixel));
draw text (xr,yr,msg,angle,heigth * real(x pixel) / x cm / 10.0,
width * real(x pixel) / x cm / 10.0)
(* heigth mm --> x punkte *)
END PROC draw;
PROC draw (TEXT CONST msg , REAL CONST winkel, INT CONST hoehe, breite):
draw ( msg, winkel, real(hoehe), real(breite) )
ENDPROC draw;
PROC bar ( INT CONST xmin, ymin, xmax, ymax, pattern ) :
(* zur Zeit leer *)
ENDPROC bar;
PROC circle ( INT CONST x,y, rad, REAL CONST from, to, INT CONST pattern):
(* zur Zeit leer *)
ENDPROC circle;
END PACKET at plot
|
