Home » Archimedes archive » Acorn User » AU 1998-06 A.adf » Regulars » StarInfo/Mellor/c/Syrup
StarInfo/Mellor/c/Syrup
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 1998-06 A.adf » Regulars |
| Filename: | StarInfo/Mellor/c/Syrup |
| Read OK: | ✔ |
| File size: | 0FE7 bytes |
| Load address: | 0000 |
| Exec address: | 0000 |
File contents
/* Syrup source code By Philip Mellor
Completed within 24 hours of buying Easy C++ ! */
#include "stdio.h"
#include "roslib.h"
#include "swis.h"
#include "math.h"
#include "kernel.h"
#include "stdlib.h"
/* global variables */
int bank_num=1;
int swap_banks()
{
_kernel_swi_regs r_in, r_out;
bank_num = 3 - bank_num;
r_in.r[0] = 112;
r_in.r[1] = bank_num;
_kernel_swi(6, &r_in, &r_out);
}
int main(void)
{ _kernel_swi_regs r_in, r_out;
/* select screen mode 15 first to ensure 2x80k screens */
os_mode(15);
os_mode(13);
os_cursor(0);
r_in.r[0] = 2;
_kernel_swi(OS_ReadDynamicArea, &r_in, &r_out);
if (r_out.r[1] < (160*1024))
{ printf("You need at least 160k screen memory.");
exit(EXIT_FAILURE);
}
/* some lovely variables */
int num, mx, my, sx, sy, xpos, offset;
int oldangle, angle, a;
/* set up all that memory gubbins */
int *ptr;
ptr = malloc(256);
char *screen_address;
char *screen_address_bank;
char *screen_address_temp;
/*find out the location of the screen memory*/
*(ptr) = 148;
*(ptr+1) = -1;
r_in.r[0] = ptr;
r_in.r[1] = ptr;
_kernel_swi(OS_ReadVduVariables, &r_in, &r_out);
int start = *(ptr);
screen_address=(char *)start;
/*select the screen bank*/
r_in.r[0] = 112;
r_in.r[1] = 3-bank_num;
_kernel_swi(6, &r_in, &r_out);
/*find out the location of the screen bank memory*/
*(ptr) = 148;
*(ptr+1) = -1;
r_in.r[0] = ptr;
r_in.r[1] = ptr;
_kernel_swi(OS_ReadVduVariables, &r_in, &r_out);
start = *(ptr);
screen_address_bank=(char *)start;
/*select the first bank*/
r_in.r[0] = 112;
r_in.r[1] = bank_num;
_kernel_swi(6, &r_in, &r_out);
/* calculate colour look-up table */
int red, green, blue, c2;
struct colourdata {
int d1 [256];
int d2 [256];
};
struct colourdata colour;
float fraction;
for (float c=0; c<256; c+=1)
{
/* use the ever-popular ColourTrans_ConvertHSVToRGB
to choose the colours */
fraction = c*1.40625*65536;
r_in.r[0] = fraction;
r_in.r[1] = 65000;
r_in.r[2] = 255;
_kernel_swi(ColourTrans_ConvertHSVToRGB, &r_in, &r_out);
red = r_out.r[0];
green = r_out.r[1];
blue = r_out.r[2];
/* a bit of a cheat to select the colour
but never mind, it works, and that's the main thing... */
r_in.r[0] = (red<<8) + (green<<16) + (blue<<24);
r_in.r[3] = 256;
r_in.r[4] = 0;
_kernel_swi(ColourTrans_SetGCOL, &r_in, &r_out);
os_circlefill(0,1023,32); /* hello mr. bodge... */
c2 = (float) c;
colour.d1[c2] = *(screen_address + 321); /* selects 2 colours */
colour.d2[c2] = *(screen_address + 322); /* so we can do dithering */
}
/* quick mr bodge! remove your evidence! */
os_cls();
os_gcol(0,63);
os_tint(2, 3);
/* keep on going 'till we hit Escape */
while (!os_inkey(-113))
{
/* change the offset every loop to add to
the colour cycling effect type thing */
offset+=1;
if (offset>255)
offset=0;
xpos = 0;
for (int i=(640); i<(320*252); i+=2)
{
xpos+=2;
if (xpos==320)
{ xpos = 0;
i+=320;
}
/* read screen memory and smooth it all out... */
num =(
*(screen_address_bank + i - 2)
+ *(screen_address_bank + i + 2)
+ *(screen_address_bank + i + 640)
+ *(screen_address_bank + i - 640)
) >> 2;
/* re-write it again */
*(screen_address_bank + i) = num;
/* offset it by the colour shift offset effort gubbins */
num+=offset;
if (num>255)
num-=255;
if (num<0)
num+=255;
/* plot 4 pixels on screen with dithering (d1 and d2) */
*(screen_address + i) = colour.d1[num];
*(screen_address + i + 1) = colour.d2[num];
*(screen_address + i +320) = colour.d2[num];
*(screen_address + i + 321) = colour.d1[num];
}
/* wait for that there v-sync */
os_cli("fx19");
/* mousetrap! */
_kernel_swi(OS_Mouse, &r_in, &r_out);
/* plot the mouse 'pointer' onto the screen bank */
swap_banks();
os_circlefill(r_out.r[0], r_out.r[1], (r_out.r[2]+2)*8 );
swap_banks();
/* round and round we go... */
}
/* that's all folks */
}
00000000 2f 2a 20 20 20 20 20 20 53 79 72 75 70 20 73 6f |/* Syrup so|
00000010 75 72 63 65 20 63 6f 64 65 20 20 42 79 20 50 68 |urce code By Ph|
00000020 69 6c 69 70 20 4d 65 6c 6c 6f 72 0a 20 20 20 43 |ilip Mellor. C|
00000030 6f 6d 70 6c 65 74 65 64 20 77 69 74 68 69 6e 20 |ompleted within |
00000040 32 34 20 68 6f 75 72 73 20 6f 66 20 62 75 79 69 |24 hours of buyi|
00000050 6e 67 20 45 61 73 79 20 43 2b 2b 20 21 20 2a 2f |ng Easy C++ ! */|
00000060 0a 0a 23 69 6e 63 6c 75 64 65 20 22 73 74 64 69 |..#include "stdi|
00000070 6f 2e 68 22 0a 23 69 6e 63 6c 75 64 65 20 22 72 |o.h".#include "r|
00000080 6f 73 6c 69 62 2e 68 22 0a 23 69 6e 63 6c 75 64 |oslib.h".#includ|
00000090 65 20 22 73 77 69 73 2e 68 22 0a 23 69 6e 63 6c |e "swis.h".#incl|
000000a0 75 64 65 20 22 6d 61 74 68 2e 68 22 0a 23 69 6e |ude "math.h".#in|
000000b0 63 6c 75 64 65 20 22 6b 65 72 6e 65 6c 2e 68 22 |clude "kernel.h"|
000000c0 0a 23 69 6e 63 6c 75 64 65 20 22 73 74 64 6c 69 |.#include "stdli|
000000d0 62 2e 68 22 0a 0a 2f 2a 20 67 6c 6f 62 61 6c 20 |b.h"../* global |
000000e0 76 61 72 69 61 62 6c 65 73 20 2a 2f 0a 69 6e 74 |variables */.int|
000000f0 20 62 61 6e 6b 5f 6e 75 6d 3d 31 3b 0a 0a 69 6e | bank_num=1;..in|
00000100 74 20 73 77 61 70 5f 62 61 6e 6b 73 28 29 0a 7b |t swap_banks().{|
00000110 0a 20 20 5f 6b 65 72 6e 65 6c 5f 73 77 69 5f 72 |. _kernel_swi_r|
00000120 65 67 73 20 72 5f 69 6e 2c 20 72 5f 6f 75 74 3b |egs r_in, r_out;|
00000130 0a 20 20 62 61 6e 6b 5f 6e 75 6d 20 3d 20 33 20 |. bank_num = 3 |
00000140 2d 20 62 61 6e 6b 5f 6e 75 6d 3b 0a 20 20 72 5f |- bank_num;. r_|
00000150 69 6e 2e 72 5b 30 5d 20 3d 20 31 31 32 3b 0a 20 |in.r[0] = 112;. |
00000160 20 72 5f 69 6e 2e 72 5b 31 5d 20 3d 20 62 61 6e | r_in.r[1] = ban|
00000170 6b 5f 6e 75 6d 3b 0a 20 20 5f 6b 65 72 6e 65 6c |k_num;. _kernel|
00000180 5f 73 77 69 28 36 2c 20 26 72 5f 69 6e 2c 20 26 |_swi(6, &r_in, &|
00000190 72 5f 6f 75 74 29 3b 0a 7d 0a 0a 69 6e 74 20 6d |r_out);.}..int m|
000001a0 61 69 6e 28 76 6f 69 64 29 0a 7b 20 5f 6b 65 72 |ain(void).{ _ker|
000001b0 6e 65 6c 5f 73 77 69 5f 72 65 67 73 20 72 5f 69 |nel_swi_regs r_i|
000001c0 6e 2c 20 72 5f 6f 75 74 3b 0a 0a 2f 2a 20 73 65 |n, r_out;../* se|
000001d0 6c 65 63 74 20 73 63 72 65 65 6e 20 6d 6f 64 65 |lect screen mode|
000001e0 20 31 35 20 66 69 72 73 74 20 74 6f 20 65 6e 73 | 15 first to ens|
000001f0 75 72 65 20 32 78 38 30 6b 20 73 63 72 65 65 6e |ure 2x80k screen|
00000200 73 20 2a 2f 0a 20 20 6f 73 5f 6d 6f 64 65 28 31 |s */. os_mode(1|
00000210 35 29 3b 0a 20 20 6f 73 5f 6d 6f 64 65 28 31 33 |5);. os_mode(13|
00000220 29 3b 0a 20 20 6f 73 5f 63 75 72 73 6f 72 28 30 |);. os_cursor(0|
00000230 29 3b 0a 0a 20 20 72 5f 69 6e 2e 72 5b 30 5d 20 |);.. r_in.r[0] |
00000240 3d 20 32 3b 0a 20 20 5f 6b 65 72 6e 65 6c 5f 73 |= 2;. _kernel_s|
00000250 77 69 28 4f 53 5f 52 65 61 64 44 79 6e 61 6d 69 |wi(OS_ReadDynami|
00000260 63 41 72 65 61 2c 20 26 72 5f 69 6e 2c 20 26 72 |cArea, &r_in, &r|
00000270 5f 6f 75 74 29 3b 0a 20 20 69 66 20 28 72 5f 6f |_out);. if (r_o|
00000280 75 74 2e 72 5b 31 5d 20 3c 20 28 31 36 30 2a 31 |ut.r[1] < (160*1|
00000290 30 32 34 29 29 0a 20 20 7b 20 70 72 69 6e 74 66 |024)). { printf|
000002a0 28 22 59 6f 75 20 6e 65 65 64 20 61 74 20 6c 65 |("You need at le|
000002b0 61 73 74 20 31 36 30 6b 20 73 63 72 65 65 6e 20 |ast 160k screen |
000002c0 6d 65 6d 6f 72 79 2e 22 29 3b 0a 20 20 20 20 65 |memory.");. e|
000002d0 78 69 74 28 45 58 49 54 5f 46 41 49 4c 55 52 45 |xit(EXIT_FAILURE|
000002e0 29 3b 0a 20 20 7d 0a 0a 2f 2a 20 73 6f 6d 65 20 |);. }../* some |
000002f0 6c 6f 76 65 6c 79 20 76 61 72 69 61 62 6c 65 73 |lovely variables|
00000300 20 2a 2f 0a 20 20 69 6e 74 20 6e 75 6d 2c 20 6d | */. int num, m|
00000310 78 2c 20 6d 79 2c 20 73 78 2c 20 73 79 2c 20 78 |x, my, sx, sy, x|
00000320 70 6f 73 2c 20 6f 66 66 73 65 74 3b 0a 20 20 69 |pos, offset;. i|
00000330 6e 74 20 6f 6c 64 61 6e 67 6c 65 2c 20 61 6e 67 |nt oldangle, ang|
00000340 6c 65 2c 20 61 3b 0a 0a 2f 2a 20 73 65 74 20 75 |le, a;../* set u|
00000350 70 20 61 6c 6c 20 74 68 61 74 20 6d 65 6d 6f 72 |p all that memor|
00000360 79 20 67 75 62 62 69 6e 73 20 2a 2f 0a 20 20 69 |y gubbins */. i|
00000370 6e 74 20 2a 70 74 72 3b 0a 20 20 70 74 72 20 3d |nt *ptr;. ptr =|
00000380 20 6d 61 6c 6c 6f 63 28 32 35 36 29 3b 0a 0a 20 | malloc(256);.. |
00000390 20 63 68 61 72 20 2a 73 63 72 65 65 6e 5f 61 64 | char *screen_ad|
000003a0 64 72 65 73 73 3b 0a 20 20 63 68 61 72 20 2a 73 |dress;. char *s|
000003b0 63 72 65 65 6e 5f 61 64 64 72 65 73 73 5f 62 61 |creen_address_ba|
000003c0 6e 6b 3b 0a 20 20 63 68 61 72 20 2a 73 63 72 65 |nk;. char *scre|
000003d0 65 6e 5f 61 64 64 72 65 73 73 5f 74 65 6d 70 3b |en_address_temp;|
000003e0 0a 0a 2f 2a 66 69 6e 64 20 6f 75 74 20 74 68 65 |../*find out the|
000003f0 20 6c 6f 63 61 74 69 6f 6e 20 6f 66 20 74 68 65 | location of the|
00000400 20 73 63 72 65 65 6e 20 6d 65 6d 6f 72 79 2a 2f | screen memory*/|
00000410 0a 20 20 2a 28 70 74 72 29 20 3d 20 31 34 38 3b |. *(ptr) = 148;|
00000420 0a 20 20 2a 28 70 74 72 2b 31 29 20 3d 20 2d 31 |. *(ptr+1) = -1|
00000430 3b 0a 20 20 72 5f 69 6e 2e 72 5b 30 5d 20 3d 20 |;. r_in.r[0] = |
00000440 70 74 72 3b 0a 20 20 72 5f 69 6e 2e 72 5b 31 5d |ptr;. r_in.r[1]|
00000450 20 3d 20 70 74 72 3b 0a 20 20 5f 6b 65 72 6e 65 | = ptr;. _kerne|
00000460 6c 5f 73 77 69 28 4f 53 5f 52 65 61 64 56 64 75 |l_swi(OS_ReadVdu|
00000470 56 61 72 69 61 62 6c 65 73 2c 20 26 72 5f 69 6e |Variables, &r_in|
00000480 2c 20 26 72 5f 6f 75 74 29 3b 0a 20 20 69 6e 74 |, &r_out);. int|
00000490 20 73 74 61 72 74 20 3d 20 2a 28 70 74 72 29 3b | start = *(ptr);|
000004a0 0a 20 20 73 63 72 65 65 6e 5f 61 64 64 72 65 73 |. screen_addres|
000004b0 73 3d 28 63 68 61 72 20 2a 29 73 74 61 72 74 3b |s=(char *)start;|
000004c0 0a 0a 2f 2a 73 65 6c 65 63 74 20 74 68 65 20 73 |../*select the s|
000004d0 63 72 65 65 6e 20 62 61 6e 6b 2a 2f 0a 20 20 72 |creen bank*/. r|
000004e0 5f 69 6e 2e 72 5b 30 5d 20 3d 20 31 31 32 3b 0a |_in.r[0] = 112;.|
000004f0 20 20 72 5f 69 6e 2e 72 5b 31 5d 20 3d 20 33 2d | r_in.r[1] = 3-|
00000500 62 61 6e 6b 5f 6e 75 6d 3b 0a 20 20 5f 6b 65 72 |bank_num;. _ker|
00000510 6e 65 6c 5f 73 77 69 28 36 2c 20 26 72 5f 69 6e |nel_swi(6, &r_in|
00000520 2c 20 26 72 5f 6f 75 74 29 3b 0a 0a 2f 2a 66 69 |, &r_out);../*fi|
00000530 6e 64 20 6f 75 74 20 74 68 65 20 6c 6f 63 61 74 |nd out the locat|
00000540 69 6f 6e 20 6f 66 20 74 68 65 20 73 63 72 65 65 |ion of the scree|
00000550 6e 20 62 61 6e 6b 20 6d 65 6d 6f 72 79 2a 2f 0a |n bank memory*/.|
00000560 20 20 2a 28 70 74 72 29 20 3d 20 31 34 38 3b 0a | *(ptr) = 148;.|
00000570 20 20 2a 28 70 74 72 2b 31 29 20 3d 20 2d 31 3b | *(ptr+1) = -1;|
00000580 0a 20 20 72 5f 69 6e 2e 72 5b 30 5d 20 3d 20 70 |. r_in.r[0] = p|
00000590 74 72 3b 0a 20 20 72 5f 69 6e 2e 72 5b 31 5d 20 |tr;. r_in.r[1] |
000005a0 3d 20 70 74 72 3b 0a 20 20 5f 6b 65 72 6e 65 6c |= ptr;. _kernel|
000005b0 5f 73 77 69 28 4f 53 5f 52 65 61 64 56 64 75 56 |_swi(OS_ReadVduV|
000005c0 61 72 69 61 62 6c 65 73 2c 20 26 72 5f 69 6e 2c |ariables, &r_in,|
000005d0 20 26 72 5f 6f 75 74 29 3b 0a 20 20 73 74 61 72 | &r_out);. star|
000005e0 74 20 3d 20 2a 28 70 74 72 29 3b 0a 20 20 73 63 |t = *(ptr);. sc|
000005f0 72 65 65 6e 5f 61 64 64 72 65 73 73 5f 62 61 6e |reen_address_ban|
00000600 6b 3d 28 63 68 61 72 20 2a 29 73 74 61 72 74 3b |k=(char *)start;|
00000610 0a 0a 2f 2a 73 65 6c 65 63 74 20 74 68 65 20 66 |../*select the f|
00000620 69 72 73 74 20 62 61 6e 6b 2a 2f 0a 20 20 72 5f |irst bank*/. r_|
00000630 69 6e 2e 72 5b 30 5d 20 3d 20 31 31 32 3b 0a 20 |in.r[0] = 112;. |
00000640 20 72 5f 69 6e 2e 72 5b 31 5d 20 3d 20 62 61 6e | r_in.r[1] = ban|
00000650 6b 5f 6e 75 6d 3b 0a 20 20 5f 6b 65 72 6e 65 6c |k_num;. _kernel|
00000660 5f 73 77 69 28 36 2c 20 26 72 5f 69 6e 2c 20 26 |_swi(6, &r_in, &|
00000670 72 5f 6f 75 74 29 3b 0a 0a 2f 2a 20 63 61 6c 63 |r_out);../* calc|
00000680 75 6c 61 74 65 20 63 6f 6c 6f 75 72 20 6c 6f 6f |ulate colour loo|
00000690 6b 2d 75 70 20 74 61 62 6c 65 20 2a 2f 0a 0a 20 |k-up table */.. |
000006a0 20 69 6e 74 20 72 65 64 2c 20 67 72 65 65 6e 2c | int red, green,|
000006b0 20 62 6c 75 65 2c 20 63 32 3b 0a 20 20 73 74 72 | blue, c2;. str|
000006c0 75 63 74 20 63 6f 6c 6f 75 72 64 61 74 61 20 7b |uct colourdata {|
000006d0 0a 20 20 20 69 6e 74 20 64 31 20 5b 32 35 36 5d |. int d1 [256]|
000006e0 3b 0a 20 20 20 69 6e 74 20 64 32 20 5b 32 35 36 |;. int d2 [256|
000006f0 5d 3b 0a 20 20 7d 3b 0a 0a 20 20 73 74 72 75 63 |];. };.. struc|
00000700 74 20 63 6f 6c 6f 75 72 64 61 74 61 20 63 6f 6c |t colourdata col|
00000710 6f 75 72 3b 0a 20 20 66 6c 6f 61 74 20 66 72 61 |our;. float fra|
00000720 63 74 69 6f 6e 3b 0a 0a 20 20 66 6f 72 20 28 66 |ction;.. for (f|
00000730 6c 6f 61 74 20 63 3d 30 3b 20 63 3c 32 35 36 3b |loat c=0; c<256;|
00000740 20 63 2b 3d 31 29 0a 20 20 7b 0a 0a 2f 2a 20 75 | c+=1). {../* u|
00000750 73 65 20 74 68 65 20 65 76 65 72 2d 70 6f 70 75 |se the ever-popu|
00000760 6c 61 72 20 43 6f 6c 6f 75 72 54 72 61 6e 73 5f |lar ColourTrans_|
00000770 43 6f 6e 76 65 72 74 48 53 56 54 6f 52 47 42 0a |ConvertHSVToRGB.|
00000780 20 20 20 74 6f 20 63 68 6f 6f 73 65 20 74 68 65 | to choose the|
00000790 20 63 6f 6c 6f 75 72 73 20 2a 2f 0a 0a 20 20 66 | colours */.. f|
000007a0 72 61 63 74 69 6f 6e 20 3d 20 63 2a 31 2e 34 30 |raction = c*1.40|
000007b0 36 32 35 2a 36 35 35 33 36 3b 0a 20 20 72 5f 69 |625*65536;. r_i|
000007c0 6e 2e 72 5b 30 5d 20 3d 20 66 72 61 63 74 69 6f |n.r[0] = fractio|
000007d0 6e 3b 0a 20 20 72 5f 69 6e 2e 72 5b 31 5d 20 3d |n;. r_in.r[1] =|
000007e0 20 36 35 30 30 30 3b 0a 20 20 72 5f 69 6e 2e 72 | 65000;. r_in.r|
000007f0 5b 32 5d 20 3d 20 32 35 35 3b 0a 20 20 5f 6b 65 |[2] = 255;. _ke|
00000800 72 6e 65 6c 5f 73 77 69 28 43 6f 6c 6f 75 72 54 |rnel_swi(ColourT|
00000810 72 61 6e 73 5f 43 6f 6e 76 65 72 74 48 53 56 54 |rans_ConvertHSVT|
00000820 6f 52 47 42 2c 20 26 72 5f 69 6e 2c 20 26 72 5f |oRGB, &r_in, &r_|
00000830 6f 75 74 29 3b 0a 20 20 72 65 64 20 3d 20 72 5f |out);. red = r_|
00000840 6f 75 74 2e 72 5b 30 5d 3b 0a 20 20 67 72 65 65 |out.r[0];. gree|
00000850 6e 20 3d 20 72 5f 6f 75 74 2e 72 5b 31 5d 3b 0a |n = r_out.r[1];.|
00000860 20 20 62 6c 75 65 20 3d 20 72 5f 6f 75 74 2e 72 | blue = r_out.r|
00000870 5b 32 5d 3b 0a 0a 2f 2a 20 61 20 62 69 74 20 6f |[2];../* a bit o|
00000880 66 20 61 20 63 68 65 61 74 20 74 6f 20 73 65 6c |f a cheat to sel|
00000890 65 63 74 20 74 68 65 20 63 6f 6c 6f 75 72 0a 20 |ect the colour. |
000008a0 20 20 62 75 74 20 6e 65 76 65 72 20 6d 69 6e 64 | but never mind|
000008b0 2c 20 69 74 20 77 6f 72 6b 73 2c 20 61 6e 64 20 |, it works, and |
000008c0 74 68 61 74 27 73 20 74 68 65 20 6d 61 69 6e 20 |that's the main |
000008d0 74 68 69 6e 67 2e 2e 2e 20 2a 2f 0a 20 20 72 5f |thing... */. r_|
000008e0 69 6e 2e 72 5b 30 5d 20 3d 20 28 72 65 64 3c 3c |in.r[0] = (red<<|
000008f0 38 29 20 2b 20 28 67 72 65 65 6e 3c 3c 31 36 29 |8) + (green<<16)|
00000900 20 2b 20 28 62 6c 75 65 3c 3c 32 34 29 3b 0a 20 | + (blue<<24);. |
00000910 20 72 5f 69 6e 2e 72 5b 33 5d 20 3d 20 32 35 36 | r_in.r[3] = 256|
00000920 3b 0a 20 20 72 5f 69 6e 2e 72 5b 34 5d 20 3d 20 |;. r_in.r[4] = |
00000930 30 3b 0a 20 20 5f 6b 65 72 6e 65 6c 5f 73 77 69 |0;. _kernel_swi|
00000940 28 43 6f 6c 6f 75 72 54 72 61 6e 73 5f 53 65 74 |(ColourTrans_Set|
00000950 47 43 4f 4c 2c 20 26 72 5f 69 6e 2c 20 26 72 5f |GCOL, &r_in, &r_|
00000960 6f 75 74 29 3b 0a 0a 20 20 6f 73 5f 63 69 72 63 |out);.. os_circ|
00000970 6c 65 66 69 6c 6c 28 30 2c 31 30 32 33 2c 33 32 |lefill(0,1023,32|
00000980 29 3b 20 20 20 20 20 20 20 20 20 20 20 20 20 20 |); |
00000990 20 20 20 20 20 2f 2a 20 68 65 6c 6c 6f 20 6d 72 | /* hello mr|
000009a0 2e 20 62 6f 64 67 65 2e 2e 2e 20 2a 2f 0a 20 20 |. bodge... */. |
000009b0 63 32 20 3d 20 28 66 6c 6f 61 74 29 20 63 3b 0a |c2 = (float) c;.|
000009c0 20 20 63 6f 6c 6f 75 72 2e 64 31 5b 63 32 5d 20 | colour.d1[c2] |
000009d0 3d 20 2a 28 73 63 72 65 65 6e 5f 61 64 64 72 65 |= *(screen_addre|
000009e0 73 73 20 2b 20 33 32 31 29 3b 20 20 20 20 2f 2a |ss + 321); /*|
000009f0 20 73 65 6c 65 63 74 73 20 32 20 63 6f 6c 6f 75 | selects 2 colou|
00000a00 72 73 20 2a 2f 0a 20 20 63 6f 6c 6f 75 72 2e 64 |rs */. colour.d|
00000a10 32 5b 63 32 5d 20 3d 20 2a 28 73 63 72 65 65 6e |2[c2] = *(screen|
00000a20 5f 61 64 64 72 65 73 73 20 2b 20 33 32 32 29 3b |_address + 322);|
00000a30 20 20 20 20 2f 2a 20 73 6f 20 77 65 20 63 61 6e | /* so we can|
00000a40 20 64 6f 20 64 69 74 68 65 72 69 6e 67 20 2a 2f | do dithering */|
00000a50 0a 20 20 7d 0a 0a 2f 2a 20 71 75 69 63 6b 20 6d |. }../* quick m|
00000a60 72 20 62 6f 64 67 65 21 20 72 65 6d 6f 76 65 20 |r bodge! remove |
00000a70 79 6f 75 72 20 65 76 69 64 65 6e 63 65 21 20 2a |your evidence! *|
00000a80 2f 0a 20 20 6f 73 5f 63 6c 73 28 29 3b 0a 0a 20 |/. os_cls();.. |
00000a90 20 6f 73 5f 67 63 6f 6c 28 30 2c 36 33 29 3b 0a | os_gcol(0,63);.|
00000aa0 20 20 6f 73 5f 74 69 6e 74 28 32 2c 20 33 29 3b | os_tint(2, 3);|
00000ab0 0a 0a 2f 2a 20 6b 65 65 70 20 6f 6e 20 67 6f 69 |../* keep on goi|
00000ac0 6e 67 20 27 74 69 6c 6c 20 77 65 20 68 69 74 20 |ng 'till we hit |
00000ad0 45 73 63 61 70 65 20 2a 2f 0a 20 20 77 68 69 6c |Escape */. whil|
00000ae0 65 20 28 21 6f 73 5f 69 6e 6b 65 79 28 2d 31 31 |e (!os_inkey(-11|
00000af0 33 29 29 0a 20 20 7b 0a 0a 2f 2a 20 63 68 61 6e |3)). {../* chan|
00000b00 67 65 20 74 68 65 20 6f 66 66 73 65 74 20 65 76 |ge the offset ev|
00000b10 65 72 79 20 6c 6f 6f 70 20 74 6f 20 61 64 64 20 |ery loop to add |
00000b20 74 6f 0a 20 20 20 74 68 65 20 63 6f 6c 6f 75 72 |to. the colour|
00000b30 20 63 79 63 6c 69 6e 67 20 65 66 66 65 63 74 20 | cycling effect |
00000b40 74 79 70 65 20 74 68 69 6e 67 20 2a 2f 0a 20 20 |type thing */. |
00000b50 6f 66 66 73 65 74 2b 3d 31 3b 0a 20 20 69 66 20 |offset+=1;. if |
00000b60 28 6f 66 66 73 65 74 3e 32 35 35 29 0a 20 20 20 |(offset>255). |
00000b70 6f 66 66 73 65 74 3d 30 3b 0a 0a 20 20 78 70 6f |offset=0;.. xpo|
00000b80 73 20 3d 20 30 3b 0a 0a 20 20 66 6f 72 20 28 69 |s = 0;.. for (i|
00000b90 6e 74 20 69 3d 28 36 34 30 29 3b 20 69 3c 28 33 |nt i=(640); i<(3|
00000ba0 32 30 2a 32 35 32 29 3b 20 69 2b 3d 32 29 0a 20 |20*252); i+=2). |
00000bb0 20 7b 0a 20 20 78 70 6f 73 2b 3d 32 3b 0a 20 20 | {. xpos+=2;. |
00000bc0 0a 20 20 69 66 20 28 78 70 6f 73 3d 3d 33 32 30 |. if (xpos==320|
00000bd0 29 0a 20 20 20 20 7b 20 78 70 6f 73 20 3d 20 30 |). { xpos = 0|
00000be0 3b 0a 20 20 20 20 20 20 69 2b 3d 33 32 30 3b 0a |;. i+=320;.|
00000bf0 20 20 20 20 7d 0a 0a 20 20 2f 2a 20 72 65 61 64 | }.. /* read|
00000c00 20 73 63 72 65 65 6e 20 6d 65 6d 6f 72 79 20 61 | screen memory a|
00000c10 6e 64 20 73 6d 6f 6f 74 68 20 69 74 20 61 6c 6c |nd smooth it all|
00000c20 20 6f 75 74 2e 2e 2e 20 2a 2f 0a 20 20 6e 75 6d | out... */. num|
00000c30 20 3d 28 0a 20 20 20 20 20 20 20 20 20 2a 28 73 | =(. *(s|
00000c40 63 72 65 65 6e 5f 61 64 64 72 65 73 73 5f 62 61 |creen_address_ba|
00000c50 6e 6b 20 2b 20 69 20 2d 20 32 29 0a 20 20 20 20 |nk + i - 2). |
00000c60 20 20 20 2b 20 2a 28 73 63 72 65 65 6e 5f 61 64 | + *(screen_ad|
00000c70 64 72 65 73 73 5f 62 61 6e 6b 20 2b 20 69 20 2b |dress_bank + i +|
00000c80 20 32 29 0a 20 20 20 20 20 20 20 2b 20 2a 28 73 | 2). + *(s|
00000c90 63 72 65 65 6e 5f 61 64 64 72 65 73 73 5f 62 61 |creen_address_ba|
00000ca0 6e 6b 20 2b 20 69 20 2b 20 36 34 30 29 0a 20 20 |nk + i + 640). |
00000cb0 20 20 20 20 20 2b 20 2a 28 73 63 72 65 65 6e 5f | + *(screen_|
00000cc0 61 64 64 72 65 73 73 5f 62 61 6e 6b 20 2b 20 69 |address_bank + i|
00000cd0 20 2d 20 36 34 30 29 0a 20 20 20 20 20 20 20 29 | - 640). )|
00000ce0 20 3e 3e 20 32 3b 0a 0a 20 20 2f 2a 20 72 65 2d | >> 2;.. /* re-|
00000cf0 77 72 69 74 65 20 69 74 20 61 67 61 69 6e 20 2a |write it again *|
00000d00 2f 0a 20 20 2a 28 73 63 72 65 65 6e 5f 61 64 64 |/. *(screen_add|
00000d10 72 65 73 73 5f 62 61 6e 6b 20 2b 20 69 29 20 3d |ress_bank + i) =|
00000d20 20 6e 75 6d 3b 0a 0a 20 20 2f 2a 20 6f 66 66 73 | num;.. /* offs|
00000d30 65 74 20 69 74 20 62 79 20 74 68 65 20 63 6f 6c |et it by the col|
00000d40 6f 75 72 20 73 68 69 66 74 20 6f 66 66 73 65 74 |our shift offset|
00000d50 20 65 66 66 6f 72 74 20 67 75 62 62 69 6e 73 20 | effort gubbins |
00000d60 2a 2f 0a 20 20 6e 75 6d 2b 3d 6f 66 66 73 65 74 |*/. num+=offset|
00000d70 3b 0a 20 20 69 66 20 28 6e 75 6d 3e 32 35 35 29 |;. if (num>255)|
00000d80 0a 20 20 20 20 6e 75 6d 2d 3d 32 35 35 3b 0a 20 |. num-=255;. |
00000d90 20 69 66 20 28 6e 75 6d 3c 30 29 0a 20 20 20 20 | if (num<0). |
00000da0 6e 75 6d 2b 3d 32 35 35 3b 0a 0a 20 20 2f 2a 20 |num+=255;.. /* |
00000db0 70 6c 6f 74 20 34 20 70 69 78 65 6c 73 20 6f 6e |plot 4 pixels on|
00000dc0 20 73 63 72 65 65 6e 20 77 69 74 68 20 64 69 74 | screen with dit|
00000dd0 68 65 72 69 6e 67 20 28 64 31 20 61 6e 64 20 64 |hering (d1 and d|
00000de0 32 29 20 2a 2f 0a 20 20 2a 28 73 63 72 65 65 6e |2) */. *(screen|
00000df0 5f 61 64 64 72 65 73 73 20 2b 20 69 29 20 3d 20 |_address + i) = |
00000e00 63 6f 6c 6f 75 72 2e 64 31 5b 6e 75 6d 5d 3b 0a |colour.d1[num];.|
00000e10 20 20 2a 28 73 63 72 65 65 6e 5f 61 64 64 72 65 | *(screen_addre|
00000e20 73 73 20 2b 20 69 20 2b 20 31 29 20 3d 20 63 6f |ss + i + 1) = co|
00000e30 6c 6f 75 72 2e 64 32 5b 6e 75 6d 5d 3b 0a 20 20 |lour.d2[num];. |
00000e40 2a 28 73 63 72 65 65 6e 5f 61 64 64 72 65 73 73 |*(screen_address|
00000e50 20 2b 20 69 20 2b 33 32 30 29 20 3d 20 63 6f 6c | + i +320) = col|
00000e60 6f 75 72 2e 64 32 5b 6e 75 6d 5d 3b 0a 20 20 2a |our.d2[num];. *|
00000e70 28 73 63 72 65 65 6e 5f 61 64 64 72 65 73 73 20 |(screen_address |
00000e80 2b 20 69 20 2b 20 33 32 31 29 20 3d 20 63 6f 6c |+ i + 321) = col|
00000e90 6f 75 72 2e 64 31 5b 6e 75 6d 5d 3b 0a 20 20 7d |our.d1[num];. }|
00000ea0 0a 0a 20 20 2f 2a 20 77 61 69 74 20 66 6f 72 20 |.. /* wait for |
00000eb0 74 68 61 74 20 74 68 65 72 65 20 76 2d 73 79 6e |that there v-syn|
00000ec0 63 20 2a 2f 0a 20 20 6f 73 5f 63 6c 69 28 22 66 |c */. os_cli("f|
00000ed0 78 31 39 22 29 3b 0a 0a 20 20 2f 2a 20 6d 6f 75 |x19");.. /* mou|
00000ee0 73 65 74 72 61 70 21 20 2a 2f 0a 20 20 5f 6b 65 |setrap! */. _ke|
00000ef0 72 6e 65 6c 5f 73 77 69 28 4f 53 5f 4d 6f 75 73 |rnel_swi(OS_Mous|
00000f00 65 2c 20 26 72 5f 69 6e 2c 20 26 72 5f 6f 75 74 |e, &r_in, &r_out|
00000f10 29 3b 0a 0a 20 20 2f 2a 20 70 6c 6f 74 20 74 68 |);.. /* plot th|
00000f20 65 20 6d 6f 75 73 65 20 27 70 6f 69 6e 74 65 72 |e mouse 'pointer|
00000f30 27 20 6f 6e 74 6f 20 74 68 65 20 73 63 72 65 65 |' onto the scree|
00000f40 6e 20 62 61 6e 6b 20 2a 2f 0a 20 20 73 77 61 70 |n bank */. swap|
00000f50 5f 62 61 6e 6b 73 28 29 3b 0a 20 20 6f 73 5f 63 |_banks();. os_c|
00000f60 69 72 63 6c 65 66 69 6c 6c 28 72 5f 6f 75 74 2e |irclefill(r_out.|
00000f70 72 5b 30 5d 2c 20 72 5f 6f 75 74 2e 72 5b 31 5d |r[0], r_out.r[1]|
00000f80 2c 20 28 72 5f 6f 75 74 2e 72 5b 32 5d 2b 32 29 |, (r_out.r[2]+2)|
00000f90 2a 38 20 29 3b 0a 20 20 73 77 61 70 5f 62 61 6e |*8 );. swap_ban|
00000fa0 6b 73 28 29 3b 0a 0a 20 20 2f 2a 20 72 6f 75 6e |ks();.. /* roun|
00000fb0 64 20 61 6e 64 20 72 6f 75 6e 64 20 77 65 20 67 |d and round we g|
00000fc0 6f 2e 2e 2e 20 2a 2f 0a 20 20 7d 0a 0a 2f 2a 20 |o... */. }../* |
00000fd0 74 68 61 74 27 73 20 61 6c 6c 20 66 6f 6c 6b 73 |that's all folks|
00000fe0 20 2a 2f 0a 7d 0a 0a | */.}..|
00000fe7 
.