Home » Archimedes archive » Archimedes World » AW-1995-02-Disc1.adf » Disk1Feb95 » !AWFeb95/Goodies/DrawBasic/!DrawBasic/Library/Surface
!AWFeb95/Goodies/DrawBasic/!DrawBasic/Library/Surface
This website contains an archive of files for the Acorn Electron, BBC Micro, Acorn Archimedes, Commodore 16 and Commodore 64 computers, which Dominic Ford has rescued from his private collection of floppy disks and cassettes.
Some of these files were originally commercial releases in the 1980s and 1990s, but they are now widely available online. I assume that copyright over them is no longer being asserted. If you own the copyright and would like files to be removed, please contact me.
Tape/disk: | Home » Archimedes archive » Archimedes World » AW-1995-02-Disc1.adf » Disk1Feb95 |
Filename: | !AWFeb95/Goodies/DrawBasic/!DrawBasic/Library/Surface |
Read OK: | ✔ |
File size: | 0377 bytes |
Load address: | 0000 |
Exec address: | 0000 |
Duplicates
There are 5 duplicate copies of this file in the archive:
- Archimedes archive » Archimedes World » AW-1995-03-Disc1.adf » Disk1Mar95 » !AWMar95/Goodies/DrawBasic/Surface
- Archimedes archive » Archimedes World » AW-1995-04-Disc1.adf » Disk1Apr95 » !AWApr95/Goodies/Draw/Surface
- Archimedes archive » Archimedes World » AW-1995-01-Disc1.adf » Disk1Jan95 » !AWJan95/Goodies/DrawBasic/!DrawBasic/Library/Surface
- Archimedes archive » Archimedes World » AW-1994-12-Disc1.adf » Disk1Dec94 » !AWDec94/Goodies/DrawBasic/!DrawBasic/Library/TestProgs/Surface
- Archimedes archive » Archimedes World » AW-1995-05-Disc1.adf » AWMay95_1 » InTheMag/DrawBasic/Surface
- Archimedes archive » Archimedes World » AW-1995-02-Disc1.adf » Disk1Feb95 » !AWFeb95/Goodies/DrawBasic/!DrawBasic/Library/Surface
File contents
REM ------------------------------------- REM REM See "Micro Computers in Geometry" REM by Adrian Oldnow REM publisher Ellis Horwood Ltd REM REM page 176-178 REM REM -------------------------------------- REM For greater resolution increase value of n n=20 DIM y(n),Y(n),x(n),X(n),z(n),Z(n) �Fill(�Cream) : �Origin(8.5,6) FOR j=0 TO n x=-PI+2*j*PI/n FOR i=0 TO n y=-PI+2*i*PI/n IF j=0 THEN z(i)=FNz(x,y) x(i)=FNProjectX(x,y,z(i)) y(i)=FNProjectY(x,y,z(i)) ELSE x(i)=X(i) : y(i)=Y(i) : z(i)=Z(i) Z(i)=FNz(x,y) X(i)=FNProjectX(x,y,Z(i)) Y(i)=FNProjectY(x,y,Z(i)) ENDIF NEXT IF j<>0 �Patch NEXT �Quit DEF �Patch FOR i=0 TO n-1 �PathBegin(path) �Move(x(i),y(i)) �Draw(x(i+1),y(i+1)) �Draw(X(i+1),Y(i+1)) �Draw(X(i),Y(i)) �CloseWithLine �PathEnd NEXT ENDPROC DEF FNProjectX(x,y,z)=1.75*(y-x/2) DEF FNProjectY(x,y,z)=1.75*(z-x/2) DEF FNz(x,y)=SIN((x*x+y*y)/2)
00000000 52 45 4d 20 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d |REM ------------| 00000010 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d |----------------| 00000020 2d 2d 2d 2d 2d 2d 2d 2d 2d 0a 52 45 4d 20 0a 52 |---------.REM .R| 00000030 45 4d 20 53 65 65 20 22 4d 69 63 72 6f 20 43 6f |EM See "Micro Co| 00000040 6d 70 75 74 65 72 73 20 69 6e 20 47 65 6f 6d 65 |mputers in Geome| 00000050 74 72 79 22 0a 52 45 4d 20 62 79 20 41 64 72 69 |try".REM by Adri| 00000060 61 6e 20 4f 6c 64 6e 6f 77 0a 52 45 4d 20 70 75 |an Oldnow.REM pu| 00000070 62 6c 69 73 68 65 72 20 45 6c 6c 69 73 20 48 6f |blisher Ellis Ho| 00000080 72 77 6f 6f 64 20 4c 74 64 0a 52 45 4d 0a 52 45 |rwood Ltd.REM.RE| 00000090 4d 20 70 61 67 65 20 31 37 36 2d 31 37 38 0a 52 |M page 176-178.R| 000000a0 45 4d 0a 52 45 4d 20 2d 2d 2d 2d 2d 2d 2d 2d 2d |EM.REM ---------| 000000b0 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d |----------------| 000000c0 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 0a 52 45 |-------------.RE| 000000d0 4d 20 46 6f 72 20 67 72 65 61 74 65 72 20 72 65 |M For greater re| 000000e0 73 6f 6c 75 74 69 6f 6e 20 69 6e 63 72 65 61 73 |solution increas| 000000f0 65 20 76 61 6c 75 65 20 6f 66 20 6e 0a 0a 6e 3d |e value of n..n=| 00000100 32 30 0a 44 49 4d 20 79 28 6e 29 2c 59 28 6e 29 |20.DIM y(n),Y(n)| 00000110 2c 78 28 6e 29 2c 58 28 6e 29 2c 7a 28 6e 29 2c |,x(n),X(n),z(n),| 00000120 5a 28 6e 29 0a a0 46 69 6c 6c 28 bb 43 72 65 61 |Z(n)..Fill(.Crea| 00000130 6d 29 20 3a 20 a0 4f 72 69 67 69 6e 28 38 2e 35 |m) : .Origin(8.5| 00000140 2c 36 29 0a 0a 46 4f 52 20 6a 3d 30 20 54 4f 20 |,6)..FOR j=0 TO | 00000150 6e 0a 20 78 3d 2d 50 49 2b 32 2a 6a 2a 50 49 2f |n. x=-PI+2*j*PI/| 00000160 6e 0a 20 46 4f 52 20 69 3d 30 20 54 4f 20 6e 0a |n. FOR i=0 TO n.| 00000170 20 79 3d 2d 50 49 2b 32 2a 69 2a 50 49 2f 6e 0a | y=-PI+2*i*PI/n.| 00000180 20 49 46 20 6a 3d 30 20 54 48 45 4e 0a 20 20 7a | IF j=0 THEN. z| 00000190 28 69 29 3d 46 4e 7a 28 78 2c 79 29 0a 20 20 78 |(i)=FNz(x,y). x| 000001a0 28 69 29 3d 46 4e 50 72 6f 6a 65 63 74 58 28 78 |(i)=FNProjectX(x| 000001b0 2c 79 2c 7a 28 69 29 29 0a 20 20 79 28 69 29 3d |,y,z(i)). y(i)=| 000001c0 46 4e 50 72 6f 6a 65 63 74 59 28 78 2c 79 2c 7a |FNProjectY(x,y,z| 000001d0 28 69 29 29 0a 20 0a 20 45 4c 53 45 0a 20 20 78 |(i)). . ELSE. x| 000001e0 28 69 29 3d 58 28 69 29 20 3a 20 79 28 69 29 3d |(i)=X(i) : y(i)=| 000001f0 59 28 69 29 20 3a 20 7a 28 69 29 3d 5a 28 69 29 |Y(i) : z(i)=Z(i)| 00000200 0a 20 20 5a 28 69 29 3d 46 4e 7a 28 78 2c 79 29 |. Z(i)=FNz(x,y)| 00000210 0a 20 20 58 28 69 29 3d 46 4e 50 72 6f 6a 65 63 |. X(i)=FNProjec| 00000220 74 58 28 78 2c 79 2c 5a 28 69 29 29 0a 20 20 59 |tX(x,y,Z(i)). Y| 00000230 28 69 29 3d 46 4e 50 72 6f 6a 65 63 74 59 28 78 |(i)=FNProjectY(x| 00000240 2c 79 2c 5a 28 69 29 29 0a 20 45 4e 44 49 46 0a |,y,Z(i)). ENDIF.| 00000250 20 4e 45 58 54 0a 20 49 46 20 6a 3c 3e 30 20 a0 | NEXT. IF j<>0 .| 00000260 50 61 74 63 68 0a 20 4e 45 58 54 0a 20 0a a0 51 |Patch. NEXT. ..Q| 00000270 75 69 74 0a 0a 44 45 46 20 a0 50 61 74 63 68 0a |uit..DEF .Patch.| 00000280 46 4f 52 20 69 3d 30 20 54 4f 20 6e 2d 31 0a a0 |FOR i=0 TO n-1..| 00000290 50 61 74 68 42 65 67 69 6e 28 70 61 74 68 29 0a |PathBegin(path).| 000002a0 a0 4d 6f 76 65 28 78 28 69 29 2c 79 28 69 29 29 |.Move(x(i),y(i))| 000002b0 0a a0 44 72 61 77 28 78 28 69 2b 31 29 2c 79 28 |..Draw(x(i+1),y(| 000002c0 69 2b 31 29 29 0a a0 44 72 61 77 28 58 28 69 2b |i+1))..Draw(X(i+| 000002d0 31 29 2c 59 28 69 2b 31 29 29 0a a0 44 72 61 77 |1),Y(i+1))..Draw| 000002e0 28 58 28 69 29 2c 59 28 69 29 29 0a a0 43 6c 6f |(X(i),Y(i))..Clo| 000002f0 73 65 57 69 74 68 4c 69 6e 65 0a a0 50 61 74 68 |seWithLine..Path| 00000300 45 6e 64 0a 4e 45 58 54 0a 45 4e 44 50 52 4f 43 |End.NEXT.ENDPROC| 00000310 0a 0a 0a 44 45 46 20 46 4e 50 72 6f 6a 65 63 74 |...DEF FNProject| 00000320 58 28 78 2c 79 2c 7a 29 3d 31 2e 37 35 2a 28 79 |X(x,y,z)=1.75*(y| 00000330 2d 78 2f 32 29 0a 44 45 46 20 46 4e 50 72 6f 6a |-x/2).DEF FNProj| 00000340 65 63 74 59 28 78 2c 79 2c 7a 29 3d 31 2e 37 35 |ectY(x,y,z)=1.75| 00000350 2a 28 7a 2d 78 2f 32 29 0a 0a 44 45 46 20 46 4e |*(z-x/2)..DEF FN| 00000360 7a 28 78 2c 79 29 3d 53 49 4e 28 28 78 2a 78 2b |z(x,y)=SIN((x*x+| 00000370 79 2a 79 29 2f 32 29 |y*y)/2)| 00000377