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Atari400-800.txt
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Atari400-800.txt
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100 REM === Setup graphics and initialize some constants
110 GRAPHICS 7:SETCOLOR 1,0,14:COLOR 2
120 PI = 3.14159265359:DIM P$(10)
130 SW = 160:SH = 80:SC = SW / 1750:XF = SW / 2
140 IF SH / 1000 < SC THEN SC = SH / 1000
150 REM === Read the vector graphics from DATA and draw the picture
160 READ P$
170 IF P$ = "EOI" THEN END
180 IF P$ = "C" OR P$ = "E" THEN GOSUB 1010
190 IF P$ = "L" THEN GOSUB 1510
200 GOTO 130
1000 REM === Draw circle or ellipse
1010 READ XC,YC,XR:YR = XR: IF P$ = "E" THEN READ YR
1020 READ AS,AE
1030 XC = XC * SC:YC = YC * SC:XR = XR * SC:YR = YR * SC
1040 A2 = XR * XR:B2 = YR * YR:F2 = 4 * A2
1050 X = 0:Y = YR:SI = 2 * B2 + A2 * (1 - 2 * YR)
1060 IF B2 * X > A2 * Y THEN GOTO 1110
1070 SP = X / Y:AN = ATN (SP):DG = 90 - AN * 180 / PI: GOSUB 1190
1080 IF SI >= 0 THEN SI = SI + F2 * (1 - Y):Y = Y - 1
1090 SI = SI + B2 * (4 * X + 6)
1100 X = X + 1: GOTO 1060
1110 F2 = 4 * B2
1120 X = XR:Y = 0:SI = 2 * A2 + B2 * (1 - 2 * XR)
1130 IF A2 * Y > B2 * X THEN RETURN
1140 SP = Y / X:AN = ATN (SP):DG = AN * 180 / PI: GOSUB 1190
1150 IF SI >= 0 THEN SI = SI + F2 * (1 - X):X = X - 1
1160 SI = SI + A2 * (4 * Y + 6)
1170 Y = Y + 1: GOTO 1130
1180 REM === Plot point on arc
1190 NS = AS:NE = AE: IF AS < 0 THEN NS = AS + 360:NE = AE + 360
1200 IF DG >= AS AND DG <= AE THEN PLOT XC + X + XF,YC - Y
1210 IF 180 - DG >= AS AND 180 - DG <= AE THEN PLOT XC - X + XF,YC - Y
1220 IF DG >= NS - 180 AND DG <= NE - 180 THEN PLOT XC - X + XF,YC + Y
1230 IF 180 - DG >= NS - 180 AND 180 - DG <= NE - 180 THEN PLOT XC + X + XF,YC + Y
1240 RETURN
1500 REM === Draw a line
1510 READ X1,Y1,X2,Y2
1520 X1 = X1 * SC:Y1 = Y1 * SC:X2 = X2 * SC:Y2 = Y2 * SC
1530 PLOT X1 + XF,Y1: DRAWTO X2 + XF,Y2
1540 RETURN
5000 REM === This is the image data
5010 DATA L,-350,24,-45,0
5020 DATA L,-450,24,-89,38
5030 DATA L,-55,77,-88,499
5040 DATA L,-129,533,-365,514
5050 DATA L,-365,517,-88,560
5060 DATA L,-11,35,-48,528
5070 DATA L,23,30,-18,529
5080 DATA L,56,99,-18,530
5090 DATA L,124,111,56,99
5100 DATA L,38,24,124,111
5110 DATA L,-64,807,101,679
5120 DATA L,-140,983,101,679
5130 DATA L,-858,786,-185,998
5140 DATA L,-864,752,-197,911
5150 DATA L,-62,687,-158,892
5160 DATA L,-226,836,-138,667
5170 DATA L,-689,586,-150,645
5180 DATA L,-340,640,-689,586
5190 DATA L,-724,633,-354,685
5200 DATA L,-360,701,-724,633
5210 DATA L,-774,676,-375,747
5220 DATA L,-380,765,-774,676
5230 DATA L,-239,796,-328,776
5240 DATA L,-320,757,-230,773
5250 DATA L,-214,729,-295,713
5260 DATA L,-286,695,-206,706
5270 DATA L,-190,663,-263,652
5280 DATA L,-365,788,-367,801
5290 DATA L,-367,801,-359,789
5300 DATA L,-225,827,-226,836
5310 DATA L,-62,687,-64,807
5320 DATA C,-41,31,31,-7,94
5330 DATA C,-90,73,36,-6,87
5340 DATA C,-126,496,38,266,354
5350 DATA C,-82,526,34,261,356
5360 DATA C,32,30,9,44,175
5370 DATA C,-261,553,461,78,93
5380 DATA C,-177,151,50,6,78
5390 DATA C,-811,219,688,-19,6
5400 DATA C,-205,420,50,269,341
5410 DATA C,-190,-999,1469,259,269
5420 DATA C,-264,-1083,1539,262,271
5430 DATA C,-212,414,41,271,339
5440 DATA C,-710,226,573,-21,8
5450 DATA C,-184,148,41,8,78
5460 DATA C,-331,859,768,78,86
5470 DATA C,-49,293,495,163,188
5480 DATA C,-256,278,295,154,196
5490 DATA C,-191,874,38,261,331
5500 DATA C,-865,759,7,80,183
5510 DATA C,-849,764,24,170,246
5520 DATA C,-175,952,47,257,318
5530 DATA C,-150,659,15,-41,89
5540 DATA C,-342,659,19,-25,81
5550 DATA C,-351,657,28,263,342
5560 DATA C,-363,721,20,-26,78
5570 DATA C,-371,721,26,260,342
5580 DATA C,-384,784,20,-12,78
5590 DATA C,-267,686,34,84,155
5600 DATA C,-285,680,15,147,267
5610 DATA C,-199,683,24,254,341
5620 DATA C,-198,683,22,-19,68
5630 DATA C,-217,747,18,-16,80
5640 DATA C,-300,746,33,82,163
5650 DATA C,-317,742,15,159,255
5660 DATA C,-226,746,28,261,347
5670 DATA C,-333,807,31,80,147
5680 DATA C,-256,824,31,-6,77
5690 DATA C,772,75,53,0,360
5700 DATA L,718,64,584,32
5710 DATA L,584,32,535,188
5720 DATA E,531,390,302,197,0,360
5730 DATA C,260,298,67,40,246
5740 DATA C,806,298,67,-69,141
5750 DATA C,426,351,49,0,360
5760 DATA C,639,351,49,0,360
5770 DATA E,533,458,115,54,200,340
5780 DATA E,531,673,151,313,142,263
5790 DATA E,531,673,151,313,-82,37
5800 DATA E,419,708,109,132,104,263
5810 DATA E,644,708,109,132,-83,76
5820 DATA E,400,961,75,61,62,192
5830 DATA E,663,961,75,61,-11,118
5840 DATA L,327,976,736,976
5850 DATA EOI