Anonymous user
Ray-casting algorithm: Difference between revisions
→{{header|ANSI Standard BASIC}}
(Add rust langage) |
|||
Line 313:
Point(8.0,5.0): TRUE
Point(10.0,10.0): FALSE</pre>
=={{header|ANSI BASIC}}==
Translated from FreeASIC:
<lang ANSI Standard BASIC>1000 PUBLIC NUMERIC x,y
1010 LET x=1
1020 LET y=2
1030 !
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)))
1050 !
1060 FUNCTION inpolygon(p1(,),p2())
1070 LET k=UBOUND(p1,1)+1
1080 DIM send (1 TO 2,2)
1090 LET wn=0
1100 FOR n=1 TO UBOUND(p1,1)
1110 LET index=MOD(n, k)
1120 LET nextindex=MOD(n+1, k)
1130 If nextindex=0 Then LET nextindex=1
1140 LET send(1,x)=p1(index,x)
1150 LET send(2,x)=p1(nextindex,x)
1160 LET send(1,y)=p1(index,y)
1170 LET send(2,y)=p1(nextindex,y)
1180 IF p1(index,y)<=p2(y) THEN
1190 If p1(nextindex,y)>p2(y) Then
1200 If isleft2(send,p2)>=0 Then !'=
1210 LET wn=wn+1
1220 END IF
1230 End If
1240 ELSE
1250 If p1(nextindex,y)<=p2(y) Then
1260 If isleft2(send,p2)<=0 Then !'=
1270 LET wn=wn-1
1280 End If
1290 End If
1300 End If
1310 NEXT n
1320 LET inpolygon = wn
1330 END FUNCTION
1340 !
1350 DIM type(1 TO 2)
1360 !
1370 DIM square(4,2)
1380 MAT READ square
1390 DATA 0,0,10,0,10,10,0,10
1400 !
1410 DIM hole(4,2)
1420 MAT READ hole
1430 DATA 2.5,2.5,7.5,2.5,7.5,7.5,2.5,7.5
1440 !
1450 DIM strange(8,2)
1460 MAT READ strange
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
1480 !
1490 DIM exagon(6,2)
1500 MAT READ exagon
1510 DATA 3,0,7,0,10,5,7,10,3,10,0,5
1520 !
1530 ! printouts
1540 FOR z=1 TO 4
1550 Select Case z
1560 Case 1
1570 Print "squared"
1580 PRINT "(5,5) ";TAB(12);
1590 MAT READ type
1600 DATA 5,5
1610 IF inpolygon(square,type) <> 0 THEN PRINT "in" ELSE PRINT "out"
1620 MAT READ type
1630 DATA 5,8
1640 PRINT "(5,8) ";TAB(12);
1650 IF inpolygon(square,type) <> 0 THEN PRINT "in" ELSE PRINT "out"
1660 PRINT "(-10,5) ";TAB(12);
1670 MAT READ type
1680 DATA -10,5
1690 IF inpolygon(square,type) <> 0 THEN PRINT "in" ELSE PRINT "out"
1700 Print "(0,5) ";Tab(12);
1710 MAT READ type
1720 DATA 0,5
1730 IF inpolygon(square,type) <> 0 THEN PRINT "in" ELSE PRINT "out"
1740 Print "(10,5) ";Tab(12);
1750 MAT READ type
1760 DATA 10,5
1770 IF inpolygon(square,type) <> 0 THEN PRINT "in" ELSE PRINT "out"
1780 PRINT "(8,5) ";TAB(12);
1790 MAT READ type
1800 DATA 8,5
1810 IF inpolygon(square,Type) <> 0 THEN PRINT "in" ELSE PRINT "out"
1820 PRINT "(10,10) ";TAB(12);
1830 MAT READ type
1840 DATA 10,10
1850 IF inpolygon(square,Type) <> 0 THEN PRINT "in" ELSE PRINT "out"
1860 PRINT
1870 CASE 2
1880 Print "squared hole"
1890 PRINT "(5,5) ";TAB(12);
1900 MAT READ type
1910 DATA 5,5
1920 IF NOT inpolygon(hole,Type)<>0 AND inpolygon(square,Type)<>0 THEN PRINT "in" ELSE PRINT "out"
1930 Print "(5,8) ";Tab(12);
1940 MAT READ type
1950 DATA 5,8
1960 IF NOT inpolygon(hole,Type)<>0 AND inpolygon(square,Type)<>0 THEN PRINT "in" ELSE PRINT "out"
1970 Print "(-10,5) ";Tab(12);
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 Print "(0,5) ";Tab(12);
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 Print "(10,5) ";Tab(12);
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 Print "(8,5) ";Tab(12);
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 Print "(10,10) ";Tab(12);
2140 MAT READ type
2150 DATA 10,10
2160 IF NOT inpolygon(hole,Type)<>0 AND inpolygon(square,Type)<>0 THEN PRINT "in" ELSE PRINT "out"
2170 PRINT
2180 CASE 3
2190 Print "strange"
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 Print "(5,8) ";Tab(12);
2250 MAT READ type
2260 DATA 5,8
2270 IF inpolygon(strange,Type)<>0 THEN PRINT "in" ELSE PRINT "out"
2280 PRINT "(-10,5) ";TAB(12);
2290 MAT READ type
2300 DATA -10,5
2310 IF inpolygon(strange,Type)<>0 THEN PRINT "in" ELSE PRINT "out"
2320 Print "(0,5) ";Tab(12);
2330 MAT READ type
2340 DATA 0,5
2350 IF inpolygon(strange,Type)<>0 THEN PRINT "in" ELSE PRINT "out"
2360 Print "(10,5) ";Tab(12);
2370 MAT READ type
2380 DATA 10,5
2390 IF inpolygon(strange,Type)<>0 THEN PRINT "in" ELSE PRINT "out"
2400 Print "(8,5) ";Tab(12);
2410 MAT READ type
2420 DATA 8,5
2430 IF inpolygon(strange,Type)<>0 THEN PRINT "in" ELSE PRINT "out"
2440 PRINT "(10,10) ";TAB(12);
2450 MAT READ type
2460 DATA 10,10
2470 IF inpolygon(strange,Type)<>0 THEN PRINT "in" ELSE PRINT "out"
2480 PRINT
2490 CASE 4
2500 PRINT "exagon"
2510 PRINT "(5,5) ";TAB(12);
2520 MAT READ type
2530 DATA 5,5
2540 IF inpolygon(exagon,Type)<>0 THEN PRINT "in" ELSE PRINT "out"
2550 Print "(5,8) ";Tab(12);
2560 MAT READ type
2570 DATA 5,8
2580 IF inpolygon(exagon,Type)<>0 THEN PRINT "in" ELSE PRINT "out"
2590 PRINT "(-10,5) ";TAB(12);
2600 MAT READ type
2610 DATA -10,5
2620 IF inpolygon(exagon,Type)<>0 THEN PRINT "in" ELSE PRINT "out"
2630 Print "(0,5) ";Tab(12);
2640 MAT READ type
2650 DATA 0,5
2660 IF inpolygon(exagon,Type)<>0 THEN PRINT "in" ELSE PRINT "out"
2670 PRINT "(10,5) ";TAB(12);
2680 MAT READ type
2690 DATA 10,5
2700 IF inpolygon(exagon,Type)<>0 THEN PRINT "in" ELSE PRINT "out"
2710 Print "(8,5) ";Tab(12);
2720 MAT READ type
2730 DATA 8,5
2740 IF inpolygon(exagon,Type)<>0 THEN PRINT "in" ELSE PRINT "out"
2750 PRINT "(10,10) ";TAB(12);
2760 MAT READ type
2770 DATA 10,10
2780 IF inpolygon(exagon,Type)<>0 THEN PRINT "in" ELSE PRINT "out"
2790 PRINT
2800 END SELECT
2810 NEXT z
2820 END</lang>
=={{header|AutoHotkey}}==
| |||