184 lines
6.2 KiB
Plaintext
184 lines
6.2 KiB
Plaintext
1000 PUBLIC NUMERIC x,y
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1010 LET x=1
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1020 LET y=2
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1030 !
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1040 DEF isLeft2(L(,),p()) = -SGN( (L(1,x)-L(2,x))*(p(y)-L(2,y)) - (p(x)-L(2,x))*(L(1,y)-L(2,y)))
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1050 !
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1060 FUNCTION inpolygon(p1(,),p2())
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1070 LET k=UBOUND(p1,1)+1
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1080 DIM send (1 TO 2,2)
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1090 LET wn=0
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1100 FOR n=1 TO UBOUND(p1,1)
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1110 LET index=MOD(n, k)
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1120 LET nextindex=MOD(n+1, k)
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1130 IF nextindex=0 THEN LET nextindex=1
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1140 LET send(1,x)=p1(index,x)
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1150 LET send(2,x)=p1(nextindex,x)
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1160 LET send(1,y)=p1(index,y)
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1170 LET send(2,y)=p1(nextindex,y)
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1180 IF p1(index,y)<=p2(y) THEN
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1190 IF p1(nextindex,y)>p2(y) THEN
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1200 IF isleft2(send,p2)>=0 THEN !'=
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1210 LET wn=wn+1
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1220 END IF
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1230 END IF
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1240 ELSE
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1250 IF p1(nextindex,y)<=p2(y) THEN
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1260 IF isleft2(send,p2)<=0 THEN !'=
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1270 LET wn=wn-1
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1280 END IF
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1290 END IF
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1300 END IF
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1310 NEXT n
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1320 LET inpolygon = wn
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1330 END FUNCTION
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1340 !
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1350 DIM type(1 TO 2)
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1360 !
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1370 DIM square(4,2)
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1380 MAT READ square
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1390 DATA 0,0,10,0,10,10,0,10
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1400 !
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1410 DIM hole(4,2)
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1420 MAT READ hole
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1430 DATA 2.5,2.5,7.5,2.5,7.5,7.5,2.5,7.5
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1440 !
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1450 DIM strange(8,2)
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1460 MAT READ strange
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1470 DATA 0,0,2.5,2.5,0,10,2.5,7.5,7.5,7.5,10,10,10,0,2.5,2.5
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1480 !
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1490 DIM exagon(6,2)
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1500 MAT READ exagon
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1510 DATA 3,0,7,0,10,5,7,10,3,10,0,5
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1520 !
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1530 ! printouts
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1540 FOR z=1 TO 4
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1550 SELECT CASE z
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1560 CASE 1
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1570 PRINT "squared"
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1580 PRINT "(5,5) ";TAB(12);
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1590 MAT READ type
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1600 DATA 5,5
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1610 IF inpolygon(square,type) <> 0 THEN PRINT "in" ELSE PRINT "out"
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1620 MAT READ type
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1630 DATA 5,8
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1640 PRINT "(5,8) ";TAB(12);
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1650 IF inpolygon(square,type) <> 0 THEN PRINT "in" ELSE PRINT "out"
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1660 PRINT "(-10,5) ";TAB(12);
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1670 MAT READ type
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1680 DATA -10,5
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1690 IF inpolygon(square,type) <> 0 THEN PRINT "in" ELSE PRINT "out"
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1700 Print "(0,5) ";Tab(12);
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1710 MAT READ type
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1720 DATA 0,5
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1730 IF inpolygon(square,type) <> 0 THEN PRINT "in" ELSE PRINT "out"
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1740 Print "(10,5) ";Tab(12);
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1750 MAT READ type
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1760 DATA 10,5
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1770 IF inpolygon(square,type) <> 0 THEN PRINT "in" ELSE PRINT "out"
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1780 PRINT "(8,5) ";TAB(12);
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1790 MAT READ type
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1800 DATA 8,5
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1810 IF inpolygon(square,Type) <> 0 THEN PRINT "in" ELSE PRINT "out"
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1820 PRINT "(10,10) ";TAB(12);
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1830 MAT READ type
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1840 DATA 10,10
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1850 IF inpolygon(square,Type) <> 0 THEN PRINT "in" ELSE PRINT "out"
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1860 PRINT
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1870 CASE 2
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1880 PRINT "squared hole"
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1890 PRINT "(5,5) ";TAB(12);
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1900 MAT READ type
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1910 DATA 5,5
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1920 IF NOT inpolygon(hole,Type)<>0 AND inpolygon(square,Type)<>0 THEN PRINT "in" ELSE PRINT "out"
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1930 Print "(5,8) ";Tab(12);
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1940 MAT READ type
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1950 DATA 5,8
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1960 IF NOT inpolygon(hole,Type)<>0 AND inpolygon(square,Type)<>0 THEN PRINT "in" ELSE PRINT "out"
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1970 PRINT "(-10,5) ";TAB(12);
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1980 MAT READ type
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1990 DATA -10,5
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2000 IF NOT inpolygon(hole,Type)<>0 AND inpolygon(square,Type)<>0 THEN PRINT "in" ELSE PRINT "out"
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2010 PRINT "(0,5) ";TAB(12);
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2020 MAT READ type
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2030 DATA 0,5
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2040 IF NOT inpolygon(hole,Type)<>0 AND inpolygon(square,Type)<>0 THEN PRINT "in" ELSE PRINT "out"
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2050 PRINT "(10,5) ";TAB(12);
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2060 MAT READ type
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2070 DATA 10,5
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2080 IF NOT inpolygon(hole,Type)<>0 AND inpolygon(square,Type)<>0 THEN PRINT "in" ELSE PRINT "out"
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2090 PRINT "(8,5) ";TAB(12);
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2100 MAT READ type
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2110 DATA 8,5
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2120 IF NOT inpolygon(hole,Type)<>0 AND inpolygon(square,Type)<>0 THEN PRINT "in" ELSE PRINT "out"
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2130 PRINT "(10,10) ";TAB(12);
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2140 MAT READ type
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2150 DATA 10,10
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2160 IF NOT inpolygon(hole,Type)<>0 AND inpolygon(square,Type)<>0 THEN PRINT "in" ELSE PRINT "out"
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2170 PRINT
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2180 CASE 3
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2190 PRINT "strange"
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2200 PRINT "(5,5) ";TAB(12);
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2210 MAT READ type
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2220 DATA 5,5
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2230 IF inpolygon(strange,Type)<>0 THEN PRINT "in" ELSE PRINT "out"
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2240 PRINT "(5,8) ";TAB(12);
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2250 MAT READ type
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2260 DATA 5,8
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2270 IF inpolygon(strange,Type)<>0 THEN PRINT "in" ELSE PRINT "out"
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2280 PRINT "(-10,5) ";TAB(12);
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2290 MAT READ type
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2300 DATA -10,5
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2310 IF inpolygon(strange,Type)<>0 THEN PRINT "in" ELSE PRINT "out"
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2320 PRINT "(0,5) ";TAB(12);
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2330 MAT READ type
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2340 DATA 0,5
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2350 IF inpolygon(strange,Type)<>0 THEN PRINT "in" ELSE PRINT "out"
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2360 PRINT "(10,5) ";TAB(12);
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2370 MAT READ type
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2380 DATA 10,5
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2390 IF inpolygon(strange,Type)<>0 THEN PRINT "in" ELSE PRINT "out"
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2400 PRINT "(8,5) ";TAB(12);
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2410 MAT READ type
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2420 DATA 8,5
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2430 IF inpolygon(strange,Type)<>0 THEN PRINT "in" ELSE PRINT "out"
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2440 PRINT "(10,10) ";TAB(12);
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2450 MAT READ type
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2460 DATA 10,10
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2470 IF inpolygon(strange,Type)<>0 THEN PRINT "in" ELSE PRINT "out"
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2480 PRINT
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2490 CASE 4
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2500 PRINT "exagon"
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2510 PRINT "(5,5) ";TAB(12);
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2520 MAT READ type
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2530 DATA 5,5
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2540 IF inpolygon(exagon,Type)<>0 THEN PRINT "in" ELSE PRINT "out"
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2550 PRINT "(5,8) ";TAB(12);
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2560 MAT READ type
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2570 DATA 5,8
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2580 IF inpolygon(exagon,Type)<>0 THEN PRINT "in" ELSE PRINT "out"
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2590 PRINT "(-10,5) ";TAB(12);
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2600 MAT READ type
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2610 DATA -10,5
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2620 IF inpolygon(exagon,Type)<>0 THEN PRINT "in" ELSE PRINT "out"
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2630 PRINT "(0,5) ";TAB(12);
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2640 MAT READ type
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2650 DATA 0,5
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2660 IF inpolygon(exagon,Type)<>0 THEN PRINT "in" ELSE PRINT "out"
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2670 PRINT "(10,5) ";TAB(12);
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2680 MAT READ type
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2690 DATA 10,5
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2700 IF inpolygon(exagon,Type)<>0 THEN PRINT "in" ELSE PRINT "out"
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2710 PRINT "(8,5) ";TAB(12);
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2720 MAT READ type
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2730 DATA 8,5
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2740 IF inpolygon(exagon,Type)<>0 THEN PRINT "in" ELSE PRINT "out"
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2750 PRINT "(10,10) ";TAB(12);
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2760 MAT READ type
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2770 DATA 10,10
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2780 IF inpolygon(exagon,Type)<>0 THEN PRINT "in" ELSE PRINT "out"
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2790 PRINT
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2800 END SELECT
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2810 NEXT z
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2820 END
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