-
Notifications
You must be signed in to change notification settings - Fork 1
/
ROTATE.TXT
558 lines (487 loc) · 8.73 KB
/
ROTATE.TXT
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
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
NAM Rotate
*Given the angle in ROTANG*
*(in DEGREES)
*Rotate the damned thing
DOROT LDA #7
JSR [PAGEIN]
LDA <ERCOLR
JSR CLS
LDX $FFA0
STX $FFA8
LDX $FFA2
STX $FFAA
LDX #$2021
STX $FFAC
LDX #$2223
STX $FFAE
LDD ROTANG
JSR SINE
LDD ROTANG
JSR COSINE
*Find it's width*
LDD <OH2
SUBD <OH1
ADDD #1
BITB #1 an odd value.
BNE G@ for screen
ADDD #1 centering
G@ PSHS D
*Find it's length*
CLRA
LDB <OV2
SUBB <OV1
BITB #1
BNE G@
ADDD #1
G@ PSHS D
*Calc it's upper LEFT* H *
LDD 2,S
LSRA
RORB
STD RGH
COMA
COMB
ADDD #1
STD UPH
*Calc it's UPPER left* V *
LDD ,S
LSRA
RORB
STD RGV
COMA
COMB
ADDD #1
STD UPV
STD CV
A@ LDX UPH
STX CH
LDU 2,S
LEAU -1,U
B@ LDX CH
LDY CV
JSR RPOINT
CMPB <ERCOLR
BEQ JHG
JSR ROTPOS
JSR RSET
INX
JSR RSET
JHG LDX CH
INX
STX CH
LEAU -1,U
CMPU #0
BNE B@
LDX CV
INX
STX CV
LDX ,S
DEX
STX ,S
BNE A@
LEAS 4,S
CLR $FF91
LDA #7
JSR [PAGEIN]
JSR FNDLM3
*RESTRICT IT!!*
LDA LMV2
SUBA LMV1
INCA
CMPA #131
BLO Z@
LDA LMV1
ADDA #125
STA LMV2
Z@
LDD LMH2
SUBD LMH1
ADDD #1
CMPD #265
BLO Z@
LDD LMH1
ADDD #260
STD LMH2
Z@
*BLOCK MOVE THE DAMNED THING*
*FIND HEIGHT*
LDA LMV2
SUBA LMV1
INCA
PSHS A
*FIND WIDTH IN BYTES*
LDD LMH1
LSRA
RORB
PSHS D
LDD LMH2
LSRA
RORB
SUBD ,S++
ADDD #1
PSHS D
LDA #160
LDB LMV1
MUL
ADDD #$8000
TFR D,U
LDD LMH1
LSRA
RORB
LEAU D,U
LDB #1
LDX #$8000
A@ LDY ,S
PSHS U,X
B@ LDA ,U+
STB $FF91
STA ,X+
CLR $FF91
LEAY -1,Y
BNE B@
PULS X,U
LEAX 160,X
LEAU 160,U
DEC 2,S
BNE A@
LEAS 3,S
LDY #44
LDA LMH1+1
LSRA
BCC G@
LEAY 1,Y
G@ STY <OH1
LDA #24
STA <OV1
LDD LMH2
SUBD LMH1
ADDD <OH1
STD <OH2
LDA LMV2
SUBA LMV1
ADDA #24
STA <OV2
LDB #%11111111
LDA <OH1+1
LSRA
BCC A@
LDB #%00001111
A@ STB <OXL
LDB #%11110000
LDA <OH2+1
LSRA
BCC A@
LDB #%11111111
A@ STB <OXR
LDD <OH1
LSRA
RORB
PSHS D
LDD <OH2
LSRA
RORB
SUBD ,S++
SUBD #1
STB <OXSZE
LDA LMV2
SUBA LMV1
INCA
STA <OYSZE
CLRA
JSR [PAGEIN]
CLR <WPAGE
JSR [MOVE9]
JMP [MENU]
*Rotate a position*
*ENTER with X=x pos, Y=y pos
*EXIT with X=new pos, Y=new pos
* Note that the coords are SIGNED around the rotation point!!!
ROTPOS PSHS U,D
BSR ROTPO1
PULS U,D,PC
ROTPO1 PSHS X,Y
*Do: X'=X*COS(angle)+Y*SIN(angle)
LDU COSVAL
STU <LMH2
LDU #LMH2
STX <LMH1
LDX #LMH1
JSR MUL16X
LDD PRDUCT
PSHS D
LDY 4,S
STY <LMH1
LDY SINVAL
STY <LMH2
JSR MUL16X
LDD PRDUCT
ADDD ,S++
STD <BH2
*Now, do:
*Y'=Y*COS(angle)-X*SIN(angle)
LDY ,S
STY <LMH1
LDY SINVAL
STY <LMH2
JSR MUL16X
LDY PRDUCT
PSHS Y
LDY COSVAL
STY <LMH2
LDY 4,S
STY <LMH1
JSR MUL16X
LDD PRDUCT
SUBD ,S++
STD 2,S
LDX <BH2
STX ,S
PULS X,Y,PC
MUL16X CLR ,-S
LDD ,X
BPL H@
COMA
COMB
ADDD #1
COM ,S
H@ LSLB
ROLA
TST ,S+
BEQ J@
COMA
COMB
ADDD #1
J@ STD ,X
*MUL16S*
*Signed 16 bit multiply
*Multiply ,X times ,U
*Answer is output in PRDUCT (32 bits!)
MUL16S PSHS X,D,Y,U
CLR ,-S neg flag
LDD ,X
BPL A@
COM ,S
COMA
COMB
ADDD #1
STD ,X
A@
LDD ,U
BPL A@
COM ,S
COMA
COMB
ADDD #1
STD ,U
A@
LDY #PRDUCT
CLR ,Y
CLR 1,Y
CLR 2,Y
CLR 3,Y
LDA 1,X
LDB 1,U
MUL
STD 2,Y
LDA ,X
LDB 1,U
MUL
ADDD 1,Y
STD 1,Y
BVC A@
INC ,Y
A@
LDA ,U
LDB 1,X
MUL
ADDD 1,Y
STD 1,Y
BVC A@
INC ,Y
A@
LDA ,U
LDB ,X
MUL
ADDD ,Y
STD ,Y
LDA ,S+
BEQ R@
*Negate the answer*
COM ,Y
COM 1,Y
COM 2,Y
COM 3,Y
INC 3,Y
BVC R@
INC 2,Y
BVC R@
INC 1,Y
BVC R@
INC ,Y
R@ PULS X,D,Y,U,PC
SINVAL FDB 0
COSVAL FDB 0
*SINE*
*Enter w/ D=angle (0-359)
*Exit w/ SINVAL=the 16 bit signed sine value
SINE LDY #SINVAL
ENTSIN CMPD #90
BLO Q1
CMPD #180
BLO Q2
CMPD #270
BLO Q3
*Q4*
PSHS D
LDD #360
SUBD ,S++
BSR LOOKUP
COMA
COMB
ADDD #1
STD ,Y
RTS
Q3 SUBD #180
BSR LOOKUP
COMA
COMB
ADDD #1
STD ,Y
RTS
Q2 PSHS D
LDD #180
SUBD ,S++
BSR LOOKUP
STD ,Y
RTS
Q1 BSR LOOKUP
STD ,Y
RTS
COSINE LDY #COSVAL
ADDD #90
CMPD #360
LBLO ENTSIN
SUBD #360
JMP ENTSIN
LOOKUP LSLB
ROLA
LDX #ANGLES
LDD D,X
RTS
ANGLE
ROTANG FDB 15
*RPOINT*
*Rotation PPOINT*
*Uses signed coords, with center (0,0) at 160,96 (_ normal coords)
*Enter w/ X=x pos, Y=y pos
*Exit w/ B=color
RPOINT PSHS X,Y,U,A
BSR RPOIN1
PULS X,Y,U,A,PC
RPOIN1
LDA #1
STA $FF91
CMPX #0
BNE J@
LDA <OH1+1
LSRA
LBCS PPB
J@ CMPX UPH
LBLT PPB
CMPX RGH
LBGT PPB
CMPY UPV
LBLT PPB
CMPY RGV
LBGT PPB
EXG X,D
SUBD UPH
EXG X,D
TFR Y,D
SUBD UPV
CMPD #191
LBHI PPB
CMPX #319
LBHI PPB
LDA #160
MUL
ADDD #$8000
TFR D,U
TFR X,D
PSHS B
LSRA
RORB
LEAU D,U
LSR ,S+
BCC G@
LDB ,U
ANDB #15
RTS
G@ LDB ,U
LSRB
LSRB
LSRB
LSRB
RTS
PPB LDB <ERCOLR
RTS
*RSET*
*Rotation PSET*
*Uses signed coords, with 0,0
*being the exact center of the
*screen 160,96
*Enter: X=x coord, Y=y coord
* B=color to set to
RSET PSHS X,D,Y,U
BSR RSET1
PULS X,D,Y,U,PC
RSET1
CLR $FF91
PSHS B
LSLB
LSLB
LSLB
LSLB
ORB ,S
STB ,S
TFR X,D
ADDD #160
CMPD #319
LBHI INVAL
PSHS D
TFR Y,D
ADDD #96
CMPD #191
LBHI INVAL2
LDA #160
MUL
ADDD #$8000
TFR D,U
LDD ,S
LSRA
RORB
LEAU D,U
LDB #%11110000
LSR 1,S
BCC T@
LDB #%00001111
T@ LEAS 2,S
TFR B,A
COMA
ANDA ,U
ANDB ,S+
PSHS A
ORB ,S+
STB ,U
RTS
INVAL2 LEAS 2,S
INVAL LEAS 1,S
RTS
UPH RMB 2
UPV RMB 2
RGH RMB 2
RGV RMB 2
CH RMB 2
CV RMB 2
PRDUCT BSZ 4
END