Home » Archimedes archive » Acorn User » AU 1997-05 B.adf » Features » 3D/!Read1st
3D/!Read1st
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 » Acorn User » AU 1997-05 B.adf » Features |
| Filename: | 3D/!Read1st |
| Read OK: | ✔ |
| File size: | 0FF8 bytes |
| Load address: | 0000 |
| Exec address: | 0000 |
File contents
************************************** **** ACORN USER 3-D Games Articles *** ************************************** PLEASE READ THIS FILE BEFORE USING ANY OF THE SOURCE CODE OR PROGRAMS ON THIS DISK. Contents: 1. "What's on this disk?" 2. "Note to STRONGARM users" 3. "Screen mode problems" 4. "The new office level" 5. "Contacting me and OTHER ISSUES" ************************************** 1. "What's on this disk?" ************************************** PLEASE DEARCHIVE all the files before use. You will find the application !AUA_Ray: A very simple, one frame, rendering ray caster. The source code is fully commented, though PLEASE contact me about ANYTHING you do not understand (a lot probably!) If you aren't in the mood for some code reading, double-click on the application, enter the X Y and Viewing angle coordinates (without commas in between, then enter any number apart from zero) and watch it generate a view. It uses the world and graphics files inside the directory (shift Double-Click on it to open, or run the program once). It also takes a screenshot of the result, and stores that inside also. The source compiled with Easy C/C++, but it has not been compiled with Acorn C or GNU C. I believe that it may compile, but with warnings. Two warnings come up with Easy C. These relate to storage of char * pointers in a long[] array. This will be remedied in future (decent!) versions of the engine. The program may take a long time on slower machines. Again this is because the program is not optimized and in the future look-up tables will be loaded in from file and not generated on the fly. It should function on almost all machines, though at this early stage I haven't bothered to write memory requirements as the engine will soon be changed a great deal. Just ensure that the Next bar in the Memory Manager is up as high it will go on 2 Meg machines. It should easily go with less than 640k available. But who can be sure? In the office directory is a new graphic file, please see 4. for more details. ************************************** 2. "Note to STRONGARM users" ************************************** StrongARM RISC PC owners may (like myself) find the program to crash with either a floating point error or some sort of instruction abort. This is nothing to do with the program, but some sort of irregularity in the StrongARM architecture which isn't spotted by the compiler. A patch is available from ART, it can be found on one of the Clan Acorn membership discs and most likely from their web site: http://www.acorn.co.uk/ ************************************** 3. "Screen mode problems" ************************************** The !AUA_Ray application uses mode 13 to generate its view. On RISC PC machines (and some of those with RISC OS 3 or later) this screen mode is "letter-boxed". This can be corrected by changing the mode definition file on your computer. The changes made are specific to your own monitor, so it is best to either: 1) Contact your dealer 2) Contact someone who knows their Acorns! 3) Contact me for advice. Note that the engine will still WORK, albeit a little "squished"! ************************************** 4. "The new office level" ************************************** The new officewall file differs to the old style walls file, in the way that it uses half as many walls. If you look carefully though, you can see that each wall comes in two versions, one darker than the other. This is a sort of cheat shading technique (employed by Wolfenstein also!) which gives the illusion of shading which really there isn't. ************************************** 5. "Contacting me and other issues" ************************************** Many of you may be slightly put off by the mathematical nature of the source code on the cover disc. There are many ways around this: 1) Ignore it, watch the progress of the engine and understand the bits you want to. 2) Just design your own levels and graphics 3) CONTACT me at AUThreeD@aol.com, or snail-mail Acorn User and they can pass your request on.
00000000 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a |****************| * 00000020 2a 2a 2a 2a 2a 2a 0a 2a 2a 2a 2a 20 41 43 4f 52 |******.**** ACOR| 00000030 4e 20 55 53 45 52 20 33 2d 44 20 47 61 6d 65 73 |N USER 3-D Games| 00000040 20 41 72 74 69 63 6c 65 73 20 2a 2a 2a 0a 2a 2a | Articles ***.**| 00000050 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a |****************| * 00000070 2a 2a 2a 2a 0a 50 4c 45 41 53 45 20 52 45 41 44 |****.PLEASE READ| 00000080 20 54 48 49 53 20 46 49 4c 45 20 42 45 46 4f 52 | THIS FILE BEFOR| 00000090 45 20 55 53 49 4e 47 20 41 4e 59 0a 4f 46 20 54 |E USING ANY.OF T| 000000a0 48 45 20 53 4f 55 52 43 45 20 43 4f 44 45 20 4f |HE SOURCE CODE O| 000000b0 52 20 50 52 4f 47 52 41 4d 53 20 4f 4e 20 54 48 |R PROGRAMS ON TH| 000000c0 49 53 0a 44 49 53 4b 2e 0a 0a 43 6f 6e 74 65 6e |IS.DISK...Conten| 000000d0 74 73 3a 0a 0a 31 2e 20 22 57 68 61 74 27 73 20 |ts:..1. "What's | 000000e0 6f 6e 20 74 68 69 73 20 64 69 73 6b 3f 22 0a 32 |on this disk?".2| 000000f0 2e 20 22 4e 6f 74 65 20 74 6f 20 53 54 52 4f 4e |. "Note to STRON| 00000100 47 41 52 4d 20 75 73 65 72 73 22 0a 33 2e 20 22 |GARM users".3. "| 00000110 53 63 72 65 65 6e 20 6d 6f 64 65 20 70 72 6f 62 |Screen mode prob| 00000120 6c 65 6d 73 22 0a 34 2e 20 22 54 68 65 20 6e 65 |lems".4. "The ne| 00000130 77 20 6f 66 66 69 63 65 20 6c 65 76 65 6c 22 0a |w office level".| 00000140 35 2e 20 22 43 6f 6e 74 61 63 74 69 6e 67 20 6d |5. "Contacting m| 00000150 65 20 61 6e 64 20 4f 54 48 45 52 20 49 53 53 55 |e and OTHER ISSU| 00000160 45 53 22 0a 0a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a |ES"..***********| 00000170 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a |****************| 00000180 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 0a 31 2e 20 22 |***********.1. "| 00000190 57 68 61 74 27 73 20 6f 6e 20 74 68 69 73 20 64 |What's on this d| 000001a0 69 73 6b 3f 22 0a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a |isk?".**********| 000001b0 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a |****************| 000001c0 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 0a 0a 50 4c |************..PL| 000001d0 45 41 53 45 20 44 45 41 52 43 48 49 56 45 20 61 |EASE DEARCHIVE a| 000001e0 6c 6c 20 74 68 65 20 66 69 6c 65 73 20 62 65 66 |ll the files bef| 000001f0 6f 72 65 20 75 73 65 2e 0a 0a 59 6f 75 20 77 69 |ore use...You wi| 00000200 6c 6c 20 66 69 6e 64 20 74 68 65 20 61 70 70 6c |ll find the appl| 00000210 69 63 61 74 69 6f 6e 20 21 41 55 41 5f 52 61 79 |ication !AUA_Ray| 00000220 3a 20 41 20 76 65 72 79 20 73 69 6d 70 6c 65 2c |: A very simple,| 00000230 20 6f 6e 65 20 66 72 61 6d 65 2c 20 72 65 6e 64 | one frame, rend| 00000240 65 72 69 6e 67 0a 72 61 79 20 63 61 73 74 65 72 |ering.ray caster| 00000250 2e 20 54 68 65 20 73 6f 75 72 63 65 20 63 6f 64 |. The source cod| 00000260 65 20 69 73 20 66 75 6c 6c 79 20 63 6f 6d 6d 65 |e is fully comme| 00000270 6e 74 65 64 2c 20 74 68 6f 75 67 68 20 50 4c 45 |nted, though PLE| 00000280 41 53 45 20 63 6f 6e 74 61 63 74 20 6d 65 0a 61 |ASE contact me.a| 00000290 62 6f 75 74 20 41 4e 59 54 48 49 4e 47 20 79 6f |bout ANYTHING yo| 000002a0 75 20 64 6f 20 6e 6f 74 20 75 6e 64 65 72 73 74 |u do not underst| 000002b0 61 6e 64 20 28 61 20 6c 6f 74 20 70 72 6f 62 61 |and (a lot proba| 000002c0 62 6c 79 21 29 20 49 66 20 79 6f 75 20 61 72 65 |bly!) If you are| 000002d0 6e 27 74 20 69 6e 0a 74 68 65 20 6d 6f 6f 64 20 |n't in.the mood | 000002e0 66 6f 72 20 73 6f 6d 65 20 63 6f 64 65 20 72 65 |for some code re| 000002f0 61 64 69 6e 67 2c 20 64 6f 75 62 6c 65 2d 63 6c |ading, double-cl| 00000300 69 63 6b 20 6f 6e 20 74 68 65 20 61 70 70 6c 69 |ick on the appli| 00000310 63 61 74 69 6f 6e 2c 20 65 6e 74 65 72 20 74 68 |cation, enter th| 00000320 65 0a 58 20 59 20 61 6e 64 20 56 69 65 77 69 6e |e.X Y and Viewin| 00000330 67 20 61 6e 67 6c 65 20 63 6f 6f 72 64 69 6e 61 |g angle coordina| 00000340 74 65 73 20 28 77 69 74 68 6f 75 74 20 63 6f 6d |tes (without com| 00000350 6d 61 73 20 69 6e 20 62 65 74 77 65 65 6e 2c 20 |mas in between, | 00000360 74 68 65 6e 20 65 6e 74 65 72 20 61 6e 79 0a 6e |then enter any.n| 00000370 75 6d 62 65 72 20 61 70 61 72 74 20 66 72 6f 6d |umber apart from| 00000380 20 7a 65 72 6f 29 20 61 6e 64 20 77 61 74 63 68 | zero) and watch| 00000390 20 69 74 20 67 65 6e 65 72 61 74 65 20 61 20 76 | it generate a v| 000003a0 69 65 77 2e 20 49 74 20 75 73 65 73 20 74 68 65 |iew. It uses the| 000003b0 20 77 6f 72 6c 64 20 61 6e 64 0a 67 72 61 70 68 | world and.graph| 000003c0 69 63 73 20 66 69 6c 65 73 20 69 6e 73 69 64 65 |ics files inside| 000003d0 20 74 68 65 20 64 69 72 65 63 74 6f 72 79 20 28 | the directory (| 000003e0 73 68 69 66 74 20 44 6f 75 62 6c 65 2d 43 6c 69 |shift Double-Cli| 000003f0 63 6b 20 6f 6e 20 69 74 20 74 6f 20 6f 70 65 6e |ck on it to open| 00000400 2c 20 6f 72 0a 72 75 6e 20 74 68 65 20 70 72 6f |, or.run the pro| 00000410 67 72 61 6d 20 6f 6e 63 65 29 2e 20 49 74 20 61 |gram once). It a| 00000420 6c 73 6f 20 74 61 6b 65 73 20 61 20 73 63 72 65 |lso takes a scre| 00000430 65 6e 73 68 6f 74 20 6f 66 20 74 68 65 20 72 65 |enshot of the re| 00000440 73 75 6c 74 2c 20 61 6e 64 20 73 74 6f 72 65 73 |sult, and stores| 00000450 0a 74 68 61 74 20 69 6e 73 69 64 65 20 61 6c 73 |.that inside als| 00000460 6f 2e 20 0a 0a 54 68 65 20 73 6f 75 72 63 65 20 |o. ..The source | 00000470 63 6f 6d 70 69 6c 65 64 20 77 69 74 68 20 45 61 |compiled with Ea| 00000480 73 79 20 43 2f 43 2b 2b 2c 20 62 75 74 20 69 74 |sy C/C++, but it| 00000490 20 68 61 73 20 6e 6f 74 20 62 65 65 6e 20 63 6f | has not been co| 000004a0 6d 70 69 6c 65 64 20 77 69 74 68 0a 41 63 6f 72 |mpiled with.Acor| 000004b0 6e 20 43 20 6f 72 20 47 4e 55 20 43 2e 20 49 20 |n C or GNU C. I | 000004c0 62 65 6c 69 65 76 65 20 74 68 61 74 20 69 74 20 |believe that it | 000004d0 6d 61 79 20 63 6f 6d 70 69 6c 65 2c 20 62 75 74 |may compile, but| 000004e0 20 77 69 74 68 20 77 61 72 6e 69 6e 67 73 2e 20 | with warnings. | 000004f0 54 77 6f 0a 77 61 72 6e 69 6e 67 73 20 63 6f 6d |Two.warnings com| 00000500 65 20 75 70 20 77 69 74 68 20 45 61 73 79 20 43 |e up with Easy C| 00000510 2e 20 54 68 65 73 65 20 72 65 6c 61 74 65 20 74 |. These relate t| 00000520 6f 20 73 74 6f 72 61 67 65 20 6f 66 20 63 68 61 |o storage of cha| 00000530 72 20 2a 20 70 6f 69 6e 74 65 72 73 0a 69 6e 20 |r * pointers.in | 00000540 61 20 6c 6f 6e 67 5b 5d 20 61 72 72 61 79 2e 20 |a long[] array. | 00000550 54 68 69 73 20 77 69 6c 6c 20 62 65 20 72 65 6d |This will be rem| 00000560 65 64 69 65 64 20 69 6e 20 66 75 74 75 72 65 20 |edied in future | 00000570 28 64 65 63 65 6e 74 21 29 20 76 65 72 73 69 6f |(decent!) versio| 00000580 6e 73 20 6f 66 0a 74 68 65 20 65 6e 67 69 6e 65 |ns of.the engine| 00000590 2e 20 0a 0a 54 68 65 20 70 72 6f 67 72 61 6d 20 |. ..The program | 000005a0 6d 61 79 20 74 61 6b 65 20 61 20 6c 6f 6e 67 20 |may take a long | 000005b0 74 69 6d 65 20 6f 6e 20 73 6c 6f 77 65 72 20 6d |time on slower m| 000005c0 61 63 68 69 6e 65 73 2e 20 41 67 61 69 6e 20 74 |achines. Again t| 000005d0 68 69 73 20 69 73 20 62 65 63 61 75 73 65 0a 74 |his is because.t| 000005e0 68 65 20 70 72 6f 67 72 61 6d 20 69 73 20 6e 6f |he program is no| 000005f0 74 20 6f 70 74 69 6d 69 7a 65 64 20 61 6e 64 20 |t optimized and | 00000600 69 6e 20 74 68 65 20 66 75 74 75 72 65 20 6c 6f |in the future lo| 00000610 6f 6b 2d 75 70 20 74 61 62 6c 65 73 20 77 69 6c |ok-up tables wil| 00000620 6c 20 62 65 0a 6c 6f 61 64 65 64 20 69 6e 20 66 |l be.loaded in f| 00000630 72 6f 6d 20 66 69 6c 65 20 61 6e 64 20 6e 6f 74 |rom file and not| 00000640 20 67 65 6e 65 72 61 74 65 64 20 6f 6e 20 74 68 | generated on th| 00000650 65 20 66 6c 79 2e 20 49 74 20 73 68 6f 75 6c 64 |e fly. It should| 00000660 20 66 75 6e 63 74 69 6f 6e 20 6f 6e 0a 61 6c 6d | function on.alm| 00000670 6f 73 74 20 61 6c 6c 20 6d 61 63 68 69 6e 65 73 |ost all machines| 00000680 2c 20 74 68 6f 75 67 68 20 61 74 20 74 68 69 73 |, though at this| 00000690 20 65 61 72 6c 79 20 73 74 61 67 65 20 49 20 68 | early stage I h| 000006a0 61 76 65 6e 27 74 20 62 6f 74 68 65 72 65 64 20 |aven't bothered | 000006b0 74 6f 20 77 72 69 74 65 0a 6d 65 6d 6f 72 79 20 |to write.memory | 000006c0 72 65 71 75 69 72 65 6d 65 6e 74 73 20 61 73 20 |requirements as | 000006d0 74 68 65 20 65 6e 67 69 6e 65 20 77 69 6c 6c 20 |the engine will | 000006e0 73 6f 6f 6e 20 62 65 20 63 68 61 6e 67 65 64 20 |soon be changed | 000006f0 61 20 67 72 65 61 74 20 64 65 61 6c 2e 20 4a 75 |a great deal. Ju| 00000700 73 74 0a 65 6e 73 75 72 65 20 74 68 61 74 20 74 |st.ensure that t| 00000710 68 65 20 4e 65 78 74 20 62 61 72 20 69 6e 20 74 |he Next bar in t| 00000720 68 65 20 4d 65 6d 6f 72 79 20 4d 61 6e 61 67 65 |he Memory Manage| 00000730 72 20 69 73 20 75 70 20 61 73 20 68 69 67 68 20 |r is up as high | 00000740 69 74 20 77 69 6c 6c 20 67 6f 20 6f 6e 0a 32 20 |it will go on.2 | 00000750 4d 65 67 20 6d 61 63 68 69 6e 65 73 2e 20 49 74 |Meg machines. It| 00000760 20 73 68 6f 75 6c 64 20 65 61 73 69 6c 79 20 67 | should easily g| 00000770 6f 20 77 69 74 68 20 6c 65 73 73 20 74 68 61 6e |o with less than| 00000780 20 36 34 30 6b 20 61 76 61 69 6c 61 62 6c 65 2e | 640k available.| 00000790 20 42 75 74 20 77 68 6f 0a 63 61 6e 20 62 65 20 | But who.can be | 000007a0 73 75 72 65 3f 0a 0a 49 6e 20 74 68 65 20 6f 66 |sure?..In the of| 000007b0 66 69 63 65 20 64 69 72 65 63 74 6f 72 79 20 69 |fice directory i| 000007c0 73 20 61 20 6e 65 77 20 67 72 61 70 68 69 63 20 |s a new graphic | 000007d0 66 69 6c 65 2c 20 70 6c 65 61 73 65 20 73 65 65 |file, please see| 000007e0 20 34 2e 20 66 6f 72 20 6d 6f 72 65 0a 64 65 74 | 4. for more.det| 000007f0 61 69 6c 73 2e 0a 0a 2a 2a 2a 2a 2a 2a 2a 2a 2a |ails...*********| 00000800 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a |****************| 00000810 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 0a 32 2e |*************.2.| 00000820 20 22 4e 6f 74 65 20 74 6f 20 53 54 52 4f 4e 47 | "Note to STRONG| 00000830 41 52 4d 20 75 73 65 72 73 22 0a 2a 2a 2a 2a 2a |ARM users".*****| 00000840 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a |****************| * 00000860 2a 0a 0a 53 74 72 6f 6e 67 41 52 4d 20 52 49 53 |*..StrongARM RIS| 00000870 43 20 50 43 20 6f 77 6e 65 72 73 20 6d 61 79 20 |C PC owners may | 00000880 28 6c 69 6b 65 20 6d 79 73 65 6c 66 29 20 66 69 |(like myself) fi| 00000890 6e 64 20 74 68 65 20 70 72 6f 67 72 61 6d 20 74 |nd the program t| 000008a0 6f 20 63 72 61 73 68 20 77 69 74 68 0a 65 69 74 |o crash with.eit| 000008b0 68 65 72 20 61 20 66 6c 6f 61 74 69 6e 67 20 70 |her a floating p| 000008c0 6f 69 6e 74 20 65 72 72 6f 72 20 6f 72 20 73 6f |oint error or so| 000008d0 6d 65 20 73 6f 72 74 20 6f 66 20 69 6e 73 74 72 |me sort of instr| 000008e0 75 63 74 69 6f 6e 20 61 62 6f 72 74 2e 20 54 68 |uction abort. Th| 000008f0 69 73 20 69 73 0a 6e 6f 74 68 69 6e 67 20 74 6f |is is.nothing to| 00000900 20 64 6f 20 77 69 74 68 20 74 68 65 20 70 72 6f | do with the pro| 00000910 67 72 61 6d 2c 20 62 75 74 20 73 6f 6d 65 20 73 |gram, but some s| 00000920 6f 72 74 20 6f 66 20 69 72 72 65 67 75 6c 61 72 |ort of irregular| 00000930 69 74 79 20 69 6e 20 74 68 65 0a 53 74 72 6f 6e |ity in the.Stron| 00000940 67 41 52 4d 20 61 72 63 68 69 74 65 63 74 75 72 |gARM architectur| 00000950 65 20 77 68 69 63 68 20 69 73 6e 27 74 20 73 70 |e which isn't sp| 00000960 6f 74 74 65 64 20 62 79 20 74 68 65 20 63 6f 6d |otted by the com| 00000970 70 69 6c 65 72 2e 0a 0a 41 20 70 61 74 63 68 20 |piler...A patch | 00000980 69 73 20 61 76 61 69 6c 61 62 6c 65 20 66 72 6f |is available fro| 00000990 6d 20 41 52 54 2c 20 69 74 20 63 61 6e 20 62 65 |m ART, it can be| 000009a0 20 66 6f 75 6e 64 20 6f 6e 20 6f 6e 65 20 6f 66 | found on one of| 000009b0 20 74 68 65 20 43 6c 61 6e 20 41 63 6f 72 6e 0a | the Clan Acorn.| 000009c0 6d 65 6d 62 65 72 73 68 69 70 20 64 69 73 63 73 |membership discs| 000009d0 20 61 6e 64 20 6d 6f 73 74 20 6c 69 6b 65 6c 79 | and most likely| 000009e0 20 66 72 6f 6d 20 74 68 65 69 72 20 77 65 62 20 | from their web | 000009f0 73 69 74 65 3a 0a 0a 68 74 74 70 3a 2f 2f 77 77 |site:..http://ww| 00000a00 77 2e 61 63 6f 72 6e 2e 63 6f 2e 75 6b 2f 0a 0a |w.acorn.co.uk/..| 00000a10 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a |****************| * 00000a30 2a 2a 2a 2a 2a 2a 0a 33 2e 20 22 53 63 72 65 65 |******.3. "Scree| 00000a40 6e 20 6d 6f 64 65 20 70 72 6f 62 6c 65 6d 73 22 |n mode problems"| 00000a50 0a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a |.***************| 00000a60 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a |****************| 00000a70 2a 2a 2a 2a 2a 2a 2a 0a 0a 54 68 65 20 21 41 55 |*******..The !AU| 00000a80 41 5f 52 61 79 20 61 70 70 6c 69 63 61 74 69 6f |A_Ray applicatio| 00000a90 6e 20 75 73 65 73 20 6d 6f 64 65 20 31 33 20 74 |n uses mode 13 t| 00000aa0 6f 20 67 65 6e 65 72 61 74 65 20 69 74 73 20 76 |o generate its v| 00000ab0 69 65 77 2e 20 4f 6e 20 52 49 53 43 20 50 43 0a |iew. On RISC PC.| 00000ac0 6d 61 63 68 69 6e 65 73 20 28 61 6e 64 20 73 6f |machines (and so| 00000ad0 6d 65 20 6f 66 20 74 68 6f 73 65 20 77 69 74 68 |me of those with| 00000ae0 20 52 49 53 43 20 4f 53 20 33 20 6f 72 20 6c 61 | RISC OS 3 or la| 00000af0 74 65 72 29 20 74 68 69 73 20 73 63 72 65 65 6e |ter) this screen| 00000b00 20 6d 6f 64 65 20 69 73 0a 22 6c 65 74 74 65 72 | mode is."letter| 00000b10 2d 62 6f 78 65 64 22 2e 20 54 68 69 73 20 63 61 |-boxed". This ca| 00000b20 6e 20 62 65 20 63 6f 72 72 65 63 74 65 64 20 62 |n be corrected b| 00000b30 79 20 63 68 61 6e 67 69 6e 67 20 74 68 65 20 6d |y changing the m| 00000b40 6f 64 65 20 64 65 66 69 6e 69 74 69 6f 6e 20 66 |ode definition f| 00000b50 69 6c 65 0a 6f 6e 20 79 6f 75 72 20 63 6f 6d 70 |ile.on your comp| 00000b60 75 74 65 72 2e 20 54 68 65 20 63 68 61 6e 67 65 |uter. The change| 00000b70 73 20 6d 61 64 65 20 61 72 65 20 73 70 65 63 69 |s made are speci| 00000b80 66 69 63 20 74 6f 20 79 6f 75 72 20 6f 77 6e 20 |fic to your own | 00000b90 6d 6f 6e 69 74 6f 72 2c 20 73 6f 20 69 74 0a 69 |monitor, so it.i| 00000ba0 73 20 62 65 73 74 20 74 6f 20 65 69 74 68 65 72 |s best to either| 00000bb0 3a 0a 0a 31 29 20 43 6f 6e 74 61 63 74 20 79 6f |:..1) Contact yo| 00000bc0 75 72 20 64 65 61 6c 65 72 0a 32 29 20 43 6f 6e |ur dealer.2) Con| 00000bd0 74 61 63 74 20 73 6f 6d 65 6f 6e 65 20 77 68 6f |tact someone who| 00000be0 20 6b 6e 6f 77 73 20 74 68 65 69 72 20 41 63 6f | knows their Aco| 00000bf0 72 6e 73 21 0a 33 29 20 43 6f 6e 74 61 63 74 20 |rns!.3) Contact | 00000c00 6d 65 20 66 6f 72 20 61 64 76 69 63 65 2e 0a 0a |me for advice...| 00000c10 4e 6f 74 65 20 74 68 61 74 20 74 68 65 20 65 6e |Note that the en| 00000c20 67 69 6e 65 20 77 69 6c 6c 20 73 74 69 6c 6c 20 |gine will still | 00000c30 57 4f 52 4b 2c 20 61 6c 62 65 69 74 20 61 20 6c |WORK, albeit a l| 00000c40 69 74 74 6c 65 20 22 73 71 75 69 73 68 65 64 22 |ittle "squished"| 00000c50 21 0a 0a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a |!..*************| 00000c60 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a |****************| 00000c70 2a 2a 2a 2a 2a 2a 2a 2a 2a 0a 34 2e 20 22 54 68 |*********.4. "Th| 00000c80 65 20 6e 65 77 20 6f 66 66 69 63 65 20 6c 65 76 |e new office lev| 00000c90 65 6c 22 0a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a |el".************| 00000ca0 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a |****************| 00000cb0 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 0a 0a 54 68 65 20 |**********..The | 00000cc0 6e 65 77 20 6f 66 66 69 63 65 77 61 6c 6c 20 66 |new officewall f| 00000cd0 69 6c 65 20 64 69 66 66 65 72 73 20 74 6f 20 74 |ile differs to t| 00000ce0 68 65 20 6f 6c 64 20 73 74 79 6c 65 20 77 61 6c |he old style wal| 00000cf0 6c 73 20 66 69 6c 65 2c 20 69 6e 20 74 68 65 20 |ls file, in the | 00000d00 77 61 79 0a 74 68 61 74 20 69 74 20 75 73 65 73 |way.that it uses| 00000d10 20 68 61 6c 66 20 61 73 20 6d 61 6e 79 20 77 61 | half as many wa| 00000d20 6c 6c 73 2e 20 49 66 20 79 6f 75 20 6c 6f 6f 6b |lls. If you look| 00000d30 20 63 61 72 65 66 75 6c 6c 79 20 74 68 6f 75 67 | carefully thoug| 00000d40 68 2c 20 79 6f 75 20 63 61 6e 20 73 65 65 0a 74 |h, you can see.t| 00000d50 68 61 74 20 65 61 63 68 20 77 61 6c 6c 20 63 6f |hat each wall co| 00000d60 6d 65 73 20 69 6e 20 74 77 6f 20 76 65 72 73 69 |mes in two versi| 00000d70 6f 6e 73 2c 20 6f 6e 65 20 64 61 72 6b 65 72 20 |ons, one darker | 00000d80 74 68 61 6e 20 74 68 65 20 6f 74 68 65 72 2e 20 |than the other. | 00000d90 54 68 69 73 20 69 73 20 61 0a 73 6f 72 74 20 6f |This is a.sort o| 00000da0 66 20 63 68 65 61 74 20 73 68 61 64 69 6e 67 20 |f cheat shading | 00000db0 74 65 63 68 6e 69 71 75 65 20 28 65 6d 70 6c 6f |technique (emplo| 00000dc0 79 65 64 20 62 79 20 57 6f 6c 66 65 6e 73 74 65 |yed by Wolfenste| 00000dd0 69 6e 20 61 6c 73 6f 21 29 20 77 68 69 63 68 20 |in also!) which | 00000de0 67 69 76 65 73 0a 74 68 65 20 69 6c 6c 75 73 69 |gives.the illusi| 00000df0 6f 6e 20 6f 66 20 73 68 61 64 69 6e 67 20 77 68 |on of shading wh| 00000e00 69 63 68 20 72 65 61 6c 6c 79 20 74 68 65 72 65 |ich really there| 00000e10 20 69 73 6e 27 74 2e 0a 0a 2a 2a 2a 2a 2a 2a 2a | isn't...*******| 00000e20 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a |****************| 00000e30 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 0a |***************.| 00000e40 35 2e 20 22 43 6f 6e 74 61 63 74 69 6e 67 20 6d |5. "Contacting m| 00000e50 65 20 61 6e 64 20 6f 74 68 65 72 20 69 73 73 75 |e and other issu| 00000e60 65 73 22 0a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a |es".************| 00000e70 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a |****************| 00000e80 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 0a 0a 4d 61 6e 79 |**********..Many| 00000e90 20 6f 66 20 79 6f 75 20 6d 61 79 20 62 65 20 73 | of you may be s| 00000ea0 6c 69 67 68 74 6c 79 20 70 75 74 20 6f 66 66 20 |lightly put off | 00000eb0 62 79 20 74 68 65 20 6d 61 74 68 65 6d 61 74 69 |by the mathemati| 00000ec0 63 61 6c 20 6e 61 74 75 72 65 20 6f 66 20 74 68 |cal nature of th| 00000ed0 65 0a 73 6f 75 72 63 65 20 63 6f 64 65 20 6f 6e |e.source code on| 00000ee0 20 74 68 65 20 63 6f 76 65 72 20 64 69 73 63 2e | the cover disc.| 00000ef0 20 54 68 65 72 65 20 61 72 65 20 6d 61 6e 79 20 | There are many | 00000f00 77 61 79 73 20 61 72 6f 75 6e 64 20 74 68 69 73 |ways around this| 00000f10 3a 0a 0a 31 29 20 49 67 6e 6f 72 65 20 69 74 2c |:..1) Ignore it,| 00000f20 20 77 61 74 63 68 20 74 68 65 20 70 72 6f 67 72 | watch the progr| 00000f30 65 73 73 20 6f 66 20 74 68 65 20 65 6e 67 69 6e |ess of the engin| 00000f40 65 20 61 6e 64 20 75 6e 64 65 72 73 74 61 6e 64 |e and understand| 00000f50 20 74 68 65 20 62 69 74 73 0a 20 20 20 79 6f 75 | the bits. you| 00000f60 20 77 61 6e 74 20 74 6f 2e 0a 32 29 20 4a 75 73 | want to..2) Jus| 00000f70 74 20 64 65 73 69 67 6e 20 79 6f 75 72 20 6f 77 |t design your ow| 00000f80 6e 20 6c 65 76 65 6c 73 20 61 6e 64 20 67 72 61 |n levels and gra| 00000f90 70 68 69 63 73 0a 33 29 20 43 4f 4e 54 41 43 54 |phics.3) CONTACT| 00000fa0 20 6d 65 20 61 74 20 41 55 54 68 72 65 65 44 40 | me at AUThreeD@| 00000fb0 61 6f 6c 2e 63 6f 6d 2c 20 6f 72 20 73 6e 61 69 |aol.com, or snai| 00000fc0 6c 2d 6d 61 69 6c 20 41 63 6f 72 6e 20 55 73 65 |l-mail Acorn Use| 00000fd0 72 20 61 6e 64 20 74 68 65 79 20 63 61 6e 0a 20 |r and they can. | 00000fe0 20 20 70 61 73 73 20 79 6f 75 72 20 72 65 71 75 | pass your requ| 00000ff0 65 73 74 20 6f 6e 2e 0a |est on..| 00000ff8
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