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Ray-casting algorithm: Difference between revisions
m
→{{header|ANSI Standard BASIC}}
Line 328:
1110 LET index=MOD(n, k)
1120 LET nextindex=MOD(n+1, k)
1130
1140 LET send(1,x)=p1(index,x)
1150 LET send(2,x)=p1(nextindex,x)
Line 334:
1170 LET send(2,y)=p1(nextindex,y)
1180 IF p1(index,y)<=p2(y) THEN
1190
1200
1210 LET wn=wn+1
1220 END IF
1230
1240 ELSE
1250
1260
1270 LET wn=wn-1
1280
1290
1300
1310 NEXT n
1320 LET inpolygon = wn
Line 370:
1530 ! printouts
1540 FOR z=1 TO 4
1550
1560
1570
1580 PRINT "(5,5) ";TAB(12);
1590 MAT READ type
Line 403:
1860 PRINT
1870 CASE 2
1880
1890 PRINT "(5,5) ";TAB(12);
1900 MAT READ type
Line 412:
1950 DATA 5,8
1960 IF NOT inpolygon(hole,Type)<>0 AND inpolygon(square,Type)<>0 THEN PRINT "in" ELSE PRINT "out"
1970
1980 MAT READ type
1990 DATA -10,5
2000 IF NOT inpolygon(hole,Type)<>0 AND inpolygon(square,Type)<>0 THEN PRINT "in" ELSE PRINT "out"
2010
2020 MAT READ type
2030 DATA 0,5
2040 IF NOT inpolygon(hole,Type)<>0 AND inpolygon(square,Type)<>0 THEN PRINT "in" ELSE PRINT "out"
2050
2060 MAT READ type
2070 DATA 10,5
2080 IF NOT inpolygon(hole,Type)<>0 AND inpolygon(square,Type)<>0 THEN PRINT "in" ELSE PRINT "out"
2090
2100 MAT READ type
2110 DATA 8,5
2120 IF NOT inpolygon(hole,Type)<>0 AND inpolygon(square,Type)<>0 THEN PRINT "in" ELSE PRINT "out"
2130
2140 MAT READ type
2150 DATA 10,10
Line 434:
2170 PRINT
2180 CASE 3
2190
2200 PRINT "(5,5) ";TAB(12);
2210 MAT READ type
2220 DATA 5,5
2230 IF inpolygon(strange,Type)<>0 THEN PRINT "in" ELSE PRINT "out"
2240
2250 MAT READ type
2260 DATA 5,8
Line 447:
2300 DATA -10,5
2310 IF inpolygon(strange,Type)<>0 THEN PRINT "in" ELSE PRINT "out"
2320
2330 MAT READ type
2340 DATA 0,5
2350 IF inpolygon(strange,Type)<>0 THEN PRINT "in" ELSE PRINT "out"
2360
2370 MAT READ type
2380 DATA 10,5
2390 IF inpolygon(strange,Type)<>0 THEN PRINT "in" ELSE PRINT "out"
2400
2410 MAT READ type
2420 DATA 8,5
Line 470:
2530 DATA 5,5
2540 IF inpolygon(exagon,Type)<>0 THEN PRINT "in" ELSE PRINT "out"
2550
2560 MAT READ type
2570 DATA 5,8
Line 478:
2610 DATA -10,5
2620 IF inpolygon(exagon,Type)<>0 THEN PRINT "in" ELSE PRINT "out"
2630
2640 MAT READ type
2650 DATA 0,5
Line 486:
2690 DATA 10,5
2700 IF inpolygon(exagon,Type)<>0 THEN PRINT "in" ELSE PRINT "out"
2710
2720 MAT READ type
2730 DATA 8,5
Line 497:
2800 END SELECT
2810 NEXT z
2820 END
</lang>
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