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Added 'Snowflakes' sample

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Joshua Bell 2017-08-27 18:47:08 -07:00
parent 05b7bbca87
commit d76e0c2d73
2 changed files with 36 additions and 0 deletions
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index.html
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@ -98,6 +98,7 @@ By <a href="mailto:inexorabletash@gmail.com">Joshua Bell</a>
<option value="sample.loresdrawing">&nbsp; Graphics Drawing (Gregg Buntin)</option>
<option value="sample.calculatedimage">&nbsp; Calculated Image (Gregg Buntin)</option>
<option value="sample.xmastree">&nbsp; Christmas Tree (Gregg Buntin and Rich Orde)</option>
<option value="sample.snowflakes">&nbsp; Snowflakes (Kevin Riordan)</option>
<option disabled>____________________________________________</option>
<option disabled>Other</option>

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samples/sample.snowflakes.txt Normal file
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100 REM *****************************************************************
110 REM * *
120 REM * SNOWFLAKE *
130 REM * A GRAPHICS NONSENSE FOR APPLE II *
140 REM * KEVIN RIORDAN 1985 *
150 REM * *
160 REM *****************************************************************
170 :
180 REM THIS PROGRAM DRAWS SUCCESSIVE AND INCREASINGLY
190 REM INTRICATE SYMMETRICAL DESIGNS ON THE HIRES
200 REM SCREEN.
210 REM SINCE IT RUNS IN AN ETERNAL LOOP, THE ONLY
220 REM WAY TO STOP IT IS TO RESET OR POWER OFF -
230 REM BUT IT'S VERY RESTFUL TO STARE AT!
240 :
250 X=3:S=140:T=95:HGR2:HCOLOR=2
260 FORY=0TOINT((X-2)/2):GOSUB280:GOSUB410
270 HGR2:NEXT:X=X+1:GOTO260
280 A1=2*(22/7)/X:A2=A1*(Y+1)
290 C=1/SIN((22/7)*(Y+1)/X)
300 D=X:E=Y+1
310 D=D-INT(D/E)*E:IFABS(D)>0.5THENF=E:E=D:D=F:GOTO310
320 E=INT(E+0.5):D=X/E
330 IFD-INT(D/2)*2>0.5THENC=C+COS((22/7)*E/(2*X))
340 G=X+0.5:K=D-0.5
350 FORL=1TOINT(G):M=0:N=0:R=(L-1)*A1
360 FORQ=1TOINT(K):M=M+COS(R)/C:N=N+SIN(R)/C
370 U=140+INT(95*M+0.5):V=95+INT(95*N+0.5)
380 HPLOT S,T TO U,V:S=U:T=V:R=R+A2:NEXT
390 U=140:V=95:HPLOT S,T TO U,V
400 S=140:T=95:NEXT:RETURN
410 FORJ=1TO1000:NEXT:RETURN