Home » Archimedes archive » Acorn User » AU 1996-12 B.adf » Features » Arcade/c/spotlights
Arcade/c/spotlights
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 1996-12 B.adf » Features |
| Filename: | Arcade/c/spotlights |
| Read OK: | ✔ |
| File size: | 0E84 bytes |
| Load address: | 0000 |
| Exec address: | 0000 |
File contents
/*
** Animation demo
** Matthew Bloch, July '96
*/
#define max_circles 500
#include <stdlib.h>
#include <stdio.h>
#include "DeskLib:h.Kbd"
#include "DeskLib:h.GFX"
#include "DeskLib:h.SWI"
#include "Popcorn:h.Popcorn"
/* So that rand() now works like the BASIC RND() function */
#define random(limit) (rand() % (limit+1))
struct object {
int x,y;
int xvel,yvel;
int size,svel;
int colour;
};
int main(void)
{
/* Initialise all our variables */
int circles = 20, start_time, end_time, frames, c;
struct object circle[max_circles];
BOOL wait_for_sync = TRUE, compensate = TRUE;
/* Switch to mode 13 (with shadow memory) and remove cursors */
SWI(2, 0, SWI_OS_Byte, 114, 0);
GFX_Mode(13);
SWI(0, 0, SWI_OS_RemoveCursors);
/* This call reads in the screen base and shadow addresses and also
** initialises the routine which switches the screen banks so we can
** just change animation banks by calling swap_banks(); and not care
** too much about what's going on; see the s.plotters file for more
** information. It's not complicated, just a couple of OS_Byte calls.
*/
Popcorn_ReadScreenDetails();
/* Initialise circles randomly (remember to seed the random no. generator) */
SWI(0, 1, SWI_OS_ReadMonotonicTime, &c);
srand(c);
for (c = 0; c != max_circles; c++)
{
circle[c].x = random(320); circle[c].y = random(256);
circle[c].xvel = random(2); circle[c].yvel = random(2);
circle[c].size = random(100); circle[c].svel = random(2)+1;
circle[c].colour = random(64);
}
/* Main animation loop, exit by pressing Escape */
SWI(0, 1, SWI_OS_ReadMonotonicTime, &start_time);
GFX_VDU(5); /* 'cos we're going to print text over the circles */
while (!Kbd_KeyDown(-113))
{
Popcorn_ClearScreen(0); /* Colour 0, i.e. black */
/* Plot circles, converting to external co-ordinates (*4) */
for (c = 0; c != circles; c++)
{
GFX_GCOL(0, circle[c].colour);
GFX_CircleFill(circle[c].x * 4, circle[c].y * 4, circle[c].size);
}
GFX_Move(0,1000);
GFX_GCOL(0, 63);
printf("Circles (1/2): %d\nWait for vsync (Q/W): %d\nSpeed compensation (A/S): %d", circles, wait_for_sync, compensate);
/* Change flags according to keypresses */
if (Kbd_KeyDown(-49) && circles != 1) circles--;
if (Kbd_KeyDown(-50) && circles != max_circles) circles++;
if (Kbd_KeyDown(-17)) wait_for_sync = FALSE;
if (Kbd_KeyDown(-34)) wait_for_sync = TRUE;
if (Kbd_KeyDown(-66)) compensate = FALSE;
if (Kbd_KeyDown(-82)) compensate = TRUE;
/* Wait for vsync */
if (wait_for_sync)
SWI(1, 0, SWI_OS_Byte, 19);
Popcorn_SwapBanks();
/* Work out no. of animation frames have passed by (=frames) */
do
{
SWI(0, 1, SWI_OS_ReadMonotonicTime, &end_time);
frames = ( (end_time - start_time) << 1 );
} while (frames == 0);
/* Move circles on by specified no. of frames, remembering to restart
** the timer here, since this now counts as part of the time taken for
** the next frame.
*/
SWI(0, 1, SWI_OS_ReadMonotonicTime, &start_time);
if (compensate)
while (frames > 0)
{
for (c = 0; c != circles; c++)
{
circle[c].x = circle[c].x + circle[c].xvel;
circle[c].y = circle[c].y + circle[c].yvel;
circle[c].size = circle[c].size + circle[c].svel;
if (circle[c].x < 0 || circle[c].x > 320)
circle[c].xvel = -circle[c].xvel;
if (circle[c].y < 0 || circle[c].y > 256)
circle[c].yvel = -circle[c].yvel;
if (circle[c].size < 0 || circle[c].size > 100)
circle[c].svel = -circle[c].svel;
}
frames--;
}
}
return(0);
}
00000000 2f 2a 0a 2a 2a 20 41 6e 69 6d 61 74 69 6f 6e 20 |/*.** Animation |
00000010 64 65 6d 6f 0a 2a 2a 20 4d 61 74 74 68 65 77 20 |demo.** Matthew |
00000020 42 6c 6f 63 68 2c 20 4a 75 6c 79 20 27 39 36 0a |Bloch, July '96.|
00000030 2a 2f 0a 0a 23 64 65 66 69 6e 65 20 6d 61 78 5f |*/..#define max_|
00000040 63 69 72 63 6c 65 73 20 35 30 30 0a 0a 23 69 6e |circles 500..#in|
00000050 63 6c 75 64 65 20 3c 73 74 64 6c 69 62 2e 68 3e |clude <stdlib.h>|
00000060 0a 23 69 6e 63 6c 75 64 65 20 3c 73 74 64 69 6f |.#include <stdio|
00000070 2e 68 3e 0a 0a 23 69 6e 63 6c 75 64 65 20 22 44 |.h>..#include "D|
00000080 65 73 6b 4c 69 62 3a 68 2e 4b 62 64 22 0a 23 69 |eskLib:h.Kbd".#i|
00000090 6e 63 6c 75 64 65 20 22 44 65 73 6b 4c 69 62 3a |nclude "DeskLib:|
000000a0 68 2e 47 46 58 22 0a 23 69 6e 63 6c 75 64 65 20 |h.GFX".#include |
000000b0 22 44 65 73 6b 4c 69 62 3a 68 2e 53 57 49 22 0a |"DeskLib:h.SWI".|
000000c0 0a 23 69 6e 63 6c 75 64 65 20 22 50 6f 70 63 6f |.#include "Popco|
000000d0 72 6e 3a 68 2e 50 6f 70 63 6f 72 6e 22 0a 0a 2f |rn:h.Popcorn"../|
000000e0 2a 20 53 6f 20 74 68 61 74 20 72 61 6e 64 28 29 |* So that rand()|
000000f0 20 6e 6f 77 20 77 6f 72 6b 73 20 6c 69 6b 65 20 | now works like |
00000100 74 68 65 20 42 41 53 49 43 20 52 4e 44 28 29 20 |the BASIC RND() |
00000110 66 75 6e 63 74 69 6f 6e 20 2a 2f 0a 0a 23 64 65 |function */..#de|
00000120 66 69 6e 65 20 72 61 6e 64 6f 6d 28 6c 69 6d 69 |fine random(limi|
00000130 74 29 20 28 72 61 6e 64 28 29 20 25 20 28 6c 69 |t) (rand() % (li|
00000140 6d 69 74 2b 31 29 29 0a 0a 73 74 72 75 63 74 20 |mit+1))..struct |
00000150 6f 62 6a 65 63 74 20 7b 0a 20 20 69 6e 74 20 78 |object {. int x|
00000160 2c 79 3b 0a 20 20 69 6e 74 20 78 76 65 6c 2c 79 |,y;. int xvel,y|
00000170 76 65 6c 3b 0a 20 20 69 6e 74 20 73 69 7a 65 2c |vel;. int size,|
00000180 73 76 65 6c 3b 0a 20 20 69 6e 74 20 63 6f 6c 6f |svel;. int colo|
00000190 75 72 3b 0a 7d 3b 0a 0a 69 6e 74 20 6d 61 69 6e |ur;.};..int main|
000001a0 28 76 6f 69 64 29 0a 7b 0a 0a 2f 2a 20 49 6e 69 |(void).{../* Ini|
000001b0 74 69 61 6c 69 73 65 20 61 6c 6c 20 6f 75 72 20 |tialise all our |
000001c0 76 61 72 69 61 62 6c 65 73 20 2a 2f 0a 0a 20 20 |variables */.. |
000001d0 69 6e 74 20 20 20 20 20 20 20 20 20 20 20 20 20 |int |
000001e0 20 63 69 72 63 6c 65 73 20 3d 20 32 30 2c 20 73 | circles = 20, s|
000001f0 74 61 72 74 5f 74 69 6d 65 2c 20 65 6e 64 5f 74 |tart_time, end_t|
00000200 69 6d 65 2c 20 66 72 61 6d 65 73 2c 20 63 3b 0a |ime, frames, c;.|
00000210 20 20 73 74 72 75 63 74 20 6f 62 6a 65 63 74 20 | struct object |
00000220 20 20 20 63 69 72 63 6c 65 5b 6d 61 78 5f 63 69 | circle[max_ci|
00000230 72 63 6c 65 73 5d 3b 0a 20 20 42 4f 4f 4c 09 20 |rcles];. BOOL. |
00000240 09 20 20 20 77 61 69 74 5f 66 6f 72 5f 73 79 6e |. wait_for_syn|
00000250 63 20 3d 20 54 52 55 45 2c 20 63 6f 6d 70 65 6e |c = TRUE, compen|
00000260 73 61 74 65 20 3d 20 54 52 55 45 3b 0a 0a 2f 2a |sate = TRUE;../*|
00000270 20 53 77 69 74 63 68 20 74 6f 20 6d 6f 64 65 20 | Switch to mode |
00000280 31 33 20 28 77 69 74 68 20 73 68 61 64 6f 77 20 |13 (with shadow |
00000290 6d 65 6d 6f 72 79 29 20 61 6e 64 20 72 65 6d 6f |memory) and remo|
000002a0 76 65 20 63 75 72 73 6f 72 73 20 2a 2f 0a 0a 20 |ve cursors */.. |
000002b0 20 53 57 49 28 32 2c 20 30 2c 20 53 57 49 5f 4f | SWI(2, 0, SWI_O|
000002c0 53 5f 42 79 74 65 2c 20 31 31 34 2c 20 30 29 3b |S_Byte, 114, 0);|
000002d0 0a 20 20 47 46 58 5f 4d 6f 64 65 28 31 33 29 3b |. GFX_Mode(13);|
000002e0 0a 20 20 53 57 49 28 30 2c 20 30 2c 20 53 57 49 |. SWI(0, 0, SWI|
000002f0 5f 4f 53 5f 52 65 6d 6f 76 65 43 75 72 73 6f 72 |_OS_RemoveCursor|
00000300 73 29 3b 0a 0a 2f 2a 20 54 68 69 73 20 63 61 6c |s);../* This cal|
00000310 6c 20 72 65 61 64 73 20 69 6e 20 74 68 65 20 73 |l reads in the s|
00000320 63 72 65 65 6e 20 62 61 73 65 20 61 6e 64 20 73 |creen base and s|
00000330 68 61 64 6f 77 20 61 64 64 72 65 73 73 65 73 20 |hadow addresses |
00000340 61 6e 64 20 61 6c 73 6f 0a 2a 2a 20 69 6e 69 74 |and also.** init|
00000350 69 61 6c 69 73 65 73 20 74 68 65 20 72 6f 75 74 |ialises the rout|
00000360 69 6e 65 20 77 68 69 63 68 20 73 77 69 74 63 68 |ine which switch|
00000370 65 73 20 74 68 65 20 73 63 72 65 65 6e 20 62 61 |es the screen ba|
00000380 6e 6b 73 20 73 6f 20 77 65 20 63 61 6e 0a 2a 2a |nks so we can.**|
00000390 20 6a 75 73 74 20 63 68 61 6e 67 65 20 61 6e 69 | just change ani|
000003a0 6d 61 74 69 6f 6e 20 62 61 6e 6b 73 20 62 79 20 |mation banks by |
000003b0 63 61 6c 6c 69 6e 67 20 73 77 61 70 5f 62 61 6e |calling swap_ban|
000003c0 6b 73 28 29 3b 20 61 6e 64 20 6e 6f 74 20 63 61 |ks(); and not ca|
000003d0 72 65 0a 2a 2a 20 74 6f 6f 20 6d 75 63 68 20 61 |re.** too much a|
000003e0 62 6f 75 74 20 77 68 61 74 27 73 20 67 6f 69 6e |bout what's goin|
000003f0 67 20 6f 6e 3b 20 73 65 65 20 74 68 65 20 73 2e |g on; see the s.|
00000400 70 6c 6f 74 74 65 72 73 20 66 69 6c 65 20 66 6f |plotters file fo|
00000410 72 20 6d 6f 72 65 0a 2a 2a 20 69 6e 66 6f 72 6d |r more.** inform|
00000420 61 74 69 6f 6e 2e 20 20 49 74 27 73 20 6e 6f 74 |ation. It's not|
00000430 20 63 6f 6d 70 6c 69 63 61 74 65 64 2c 20 6a 75 | complicated, ju|
00000440 73 74 20 61 20 63 6f 75 70 6c 65 20 6f 66 20 4f |st a couple of O|
00000450 53 5f 42 79 74 65 20 63 61 6c 6c 73 2e 0a 2a 2f |S_Byte calls..*/|
00000460 0a 0a 20 20 50 6f 70 63 6f 72 6e 5f 52 65 61 64 |.. Popcorn_Read|
00000470 53 63 72 65 65 6e 44 65 74 61 69 6c 73 28 29 3b |ScreenDetails();|
00000480 0a 0a 2f 2a 20 49 6e 69 74 69 61 6c 69 73 65 20 |../* Initialise |
00000490 63 69 72 63 6c 65 73 20 72 61 6e 64 6f 6d 6c 79 |circles randomly|
000004a0 20 28 72 65 6d 65 6d 62 65 72 20 74 6f 20 73 65 | (remember to se|
000004b0 65 64 20 74 68 65 20 72 61 6e 64 6f 6d 20 6e 6f |ed the random no|
000004c0 2e 20 67 65 6e 65 72 61 74 6f 72 29 20 2a 2f 0a |. generator) */.|
000004d0 0a 20 20 53 57 49 28 30 2c 20 31 2c 20 53 57 49 |. SWI(0, 1, SWI|
000004e0 5f 4f 53 5f 52 65 61 64 4d 6f 6e 6f 74 6f 6e 69 |_OS_ReadMonotoni|
000004f0 63 54 69 6d 65 2c 20 26 63 29 3b 0a 20 20 73 72 |cTime, &c);. sr|
00000500 61 6e 64 28 63 29 3b 0a 0a 20 20 66 6f 72 20 28 |and(c);.. for (|
00000510 63 20 3d 20 30 3b 20 63 20 21 3d 20 6d 61 78 5f |c = 0; c != max_|
00000520 63 69 72 63 6c 65 73 3b 20 63 2b 2b 29 0a 20 20 |circles; c++). |
00000530 7b 0a 20 20 20 20 63 69 72 63 6c 65 5b 63 5d 2e |{. circle[c].|
00000540 78 20 20 20 20 3d 20 72 61 6e 64 6f 6d 28 33 32 |x = random(32|
00000550 30 29 3b 20 63 69 72 63 6c 65 5b 63 5d 2e 79 20 |0); circle[c].y |
00000560 20 20 20 3d 20 72 61 6e 64 6f 6d 28 32 35 36 29 | = random(256)|
00000570 3b 0a 20 20 20 20 63 69 72 63 6c 65 5b 63 5d 2e |;. circle[c].|
00000580 78 76 65 6c 20 3d 20 72 61 6e 64 6f 6d 28 32 29 |xvel = random(2)|
00000590 3b 20 63 69 72 63 6c 65 5b 63 5d 2e 79 76 65 6c |; circle[c].yvel|
000005a0 20 3d 20 72 61 6e 64 6f 6d 28 32 29 3b 0a 20 20 | = random(2);. |
000005b0 20 20 63 69 72 63 6c 65 5b 63 5d 2e 73 69 7a 65 | circle[c].size|
000005c0 20 3d 20 72 61 6e 64 6f 6d 28 31 30 30 29 3b 20 | = random(100); |
000005d0 63 69 72 63 6c 65 5b 63 5d 2e 73 76 65 6c 20 3d |circle[c].svel =|
000005e0 20 72 61 6e 64 6f 6d 28 32 29 2b 31 3b 0a 20 20 | random(2)+1;. |
000005f0 20 20 63 69 72 63 6c 65 5b 63 5d 2e 63 6f 6c 6f | circle[c].colo|
00000600 75 72 20 3d 20 72 61 6e 64 6f 6d 28 36 34 29 3b |ur = random(64);|
00000610 0a 20 20 7d 0a 0a 2f 2a 20 4d 61 69 6e 20 61 6e |. }../* Main an|
00000620 69 6d 61 74 69 6f 6e 20 6c 6f 6f 70 2c 20 65 78 |imation loop, ex|
00000630 69 74 20 62 79 20 70 72 65 73 73 69 6e 67 20 45 |it by pressing E|
00000640 73 63 61 70 65 20 2a 2f 0a 0a 20 20 53 57 49 28 |scape */.. SWI(|
00000650 30 2c 20 31 2c 20 53 57 49 5f 4f 53 5f 52 65 61 |0, 1, SWI_OS_Rea|
00000660 64 4d 6f 6e 6f 74 6f 6e 69 63 54 69 6d 65 2c 20 |dMonotonicTime, |
00000670 26 73 74 61 72 74 5f 74 69 6d 65 29 3b 0a 20 20 |&start_time);. |
00000680 47 46 58 5f 56 44 55 28 35 29 3b 20 2f 2a 20 27 |GFX_VDU(5); /* '|
00000690 63 6f 73 20 77 65 27 72 65 20 67 6f 69 6e 67 20 |cos we're going |
000006a0 74 6f 20 70 72 69 6e 74 20 74 65 78 74 20 6f 76 |to print text ov|
000006b0 65 72 20 74 68 65 20 63 69 72 63 6c 65 73 20 2a |er the circles *|
000006c0 2f 0a 0a 20 20 77 68 69 6c 65 20 28 21 4b 62 64 |/.. while (!Kbd|
000006d0 5f 4b 65 79 44 6f 77 6e 28 2d 31 31 33 29 29 0a |_KeyDown(-113)).|
000006e0 20 20 7b 0a 20 20 20 20 50 6f 70 63 6f 72 6e 5f | {. Popcorn_|
000006f0 43 6c 65 61 72 53 63 72 65 65 6e 28 30 29 3b 20 |ClearScreen(0); |
00000700 2f 2a 20 43 6f 6c 6f 75 72 20 30 2c 20 69 2e 65 |/* Colour 0, i.e|
00000710 2e 20 62 6c 61 63 6b 20 2a 2f 0a 0a 2f 2a 20 50 |. black */../* P|
00000720 6c 6f 74 20 63 69 72 63 6c 65 73 2c 20 63 6f 6e |lot circles, con|
00000730 76 65 72 74 69 6e 67 20 74 6f 20 65 78 74 65 72 |verting to exter|
00000740 6e 61 6c 20 63 6f 2d 6f 72 64 69 6e 61 74 65 73 |nal co-ordinates|
00000750 20 28 2a 34 29 20 2a 2f 0a 0a 20 20 20 20 66 6f | (*4) */.. fo|
00000760 72 20 28 63 20 3d 20 30 3b 20 63 20 21 3d 20 63 |r (c = 0; c != c|
00000770 69 72 63 6c 65 73 3b 20 63 2b 2b 29 0a 20 20 20 |ircles; c++). |
00000780 20 7b 0a 20 20 20 20 20 20 47 46 58 5f 47 43 4f | {. GFX_GCO|
00000790 4c 28 30 2c 20 63 69 72 63 6c 65 5b 63 5d 2e 63 |L(0, circle[c].c|
000007a0 6f 6c 6f 75 72 29 3b 0a 20 20 20 20 20 20 47 46 |olour);. GF|
000007b0 58 5f 43 69 72 63 6c 65 46 69 6c 6c 28 63 69 72 |X_CircleFill(cir|
000007c0 63 6c 65 5b 63 5d 2e 78 20 2a 20 34 2c 20 63 69 |cle[c].x * 4, ci|
000007d0 72 63 6c 65 5b 63 5d 2e 79 20 2a 20 34 2c 20 63 |rcle[c].y * 4, c|
000007e0 69 72 63 6c 65 5b 63 5d 2e 73 69 7a 65 29 3b 0a |ircle[c].size);.|
000007f0 20 20 20 20 7d 0a 0a 20 20 20 20 47 46 58 5f 4d | }.. GFX_M|
00000800 6f 76 65 28 30 2c 31 30 30 30 29 3b 0a 20 20 20 |ove(0,1000);. |
00000810 20 47 46 58 5f 47 43 4f 4c 28 30 2c 20 36 33 29 | GFX_GCOL(0, 63)|
00000820 3b 0a 20 20 20 20 70 72 69 6e 74 66 28 22 43 69 |;. printf("Ci|
00000830 72 63 6c 65 73 20 28 31 2f 32 29 3a 20 25 64 5c |rcles (1/2): %d\|
00000840 6e 57 61 69 74 20 66 6f 72 20 76 73 79 6e 63 20 |nWait for vsync |
00000850 28 51 2f 57 29 3a 20 25 64 5c 6e 53 70 65 65 64 |(Q/W): %d\nSpeed|
00000860 20 63 6f 6d 70 65 6e 73 61 74 69 6f 6e 20 28 41 | compensation (A|
00000870 2f 53 29 3a 20 25 64 22 2c 20 63 69 72 63 6c 65 |/S): %d", circle|
00000880 73 2c 20 77 61 69 74 5f 66 6f 72 5f 73 79 6e 63 |s, wait_for_sync|
00000890 2c 20 63 6f 6d 70 65 6e 73 61 74 65 29 3b 0a 0a |, compensate);..|
000008a0 2f 2a 20 43 68 61 6e 67 65 20 66 6c 61 67 73 20 |/* Change flags |
000008b0 61 63 63 6f 72 64 69 6e 67 20 74 6f 20 6b 65 79 |according to key|
000008c0 70 72 65 73 73 65 73 20 2a 2f 0a 0a 20 20 20 20 |presses */.. |
000008d0 69 66 20 28 4b 62 64 5f 4b 65 79 44 6f 77 6e 28 |if (Kbd_KeyDown(|
000008e0 2d 34 39 29 20 26 26 20 63 69 72 63 6c 65 73 20 |-49) && circles |
000008f0 21 3d 20 31 29 20 63 69 72 63 6c 65 73 2d 2d 3b |!= 1) circles--;|
00000900 0a 20 20 20 20 69 66 20 28 4b 62 64 5f 4b 65 79 |. if (Kbd_Key|
00000910 44 6f 77 6e 28 2d 35 30 29 20 26 26 20 63 69 72 |Down(-50) && cir|
00000920 63 6c 65 73 20 21 3d 20 6d 61 78 5f 63 69 72 63 |cles != max_circ|
00000930 6c 65 73 29 20 63 69 72 63 6c 65 73 2b 2b 3b 0a |les) circles++;.|
00000940 20 20 20 20 69 66 20 28 4b 62 64 5f 4b 65 79 44 | if (Kbd_KeyD|
00000950 6f 77 6e 28 2d 31 37 29 29 20 77 61 69 74 5f 66 |own(-17)) wait_f|
00000960 6f 72 5f 73 79 6e 63 20 3d 20 46 41 4c 53 45 3b |or_sync = FALSE;|
00000970 0a 20 20 20 20 69 66 20 28 4b 62 64 5f 4b 65 79 |. if (Kbd_Key|
00000980 44 6f 77 6e 28 2d 33 34 29 29 20 77 61 69 74 5f |Down(-34)) wait_|
00000990 66 6f 72 5f 73 79 6e 63 20 3d 20 54 52 55 45 3b |for_sync = TRUE;|
000009a0 0a 20 20 20 20 69 66 20 28 4b 62 64 5f 4b 65 79 |. if (Kbd_Key|
000009b0 44 6f 77 6e 28 2d 36 36 29 29 20 63 6f 6d 70 65 |Down(-66)) compe|
000009c0 6e 73 61 74 65 20 3d 20 46 41 4c 53 45 3b 0a 20 |nsate = FALSE;. |
000009d0 20 20 20 69 66 20 28 4b 62 64 5f 4b 65 79 44 6f | if (Kbd_KeyDo|
000009e0 77 6e 28 2d 38 32 29 29 20 63 6f 6d 70 65 6e 73 |wn(-82)) compens|
000009f0 61 74 65 20 3d 20 54 52 55 45 3b 0a 0a 2f 2a 20 |ate = TRUE;../* |
00000a00 57 61 69 74 20 66 6f 72 20 76 73 79 6e 63 20 2a |Wait for vsync *|
00000a10 2f 0a 0a 20 20 20 20 69 66 20 28 77 61 69 74 5f |/.. if (wait_|
00000a20 66 6f 72 5f 73 79 6e 63 29 0a 20 20 20 20 20 20 |for_sync). |
00000a30 53 57 49 28 31 2c 20 30 2c 20 53 57 49 5f 4f 53 |SWI(1, 0, SWI_OS|
00000a40 5f 42 79 74 65 2c 20 31 39 29 3b 0a 20 20 20 20 |_Byte, 19);. |
00000a50 50 6f 70 63 6f 72 6e 5f 53 77 61 70 42 61 6e 6b |Popcorn_SwapBank|
00000a60 73 28 29 3b 0a 0a 2f 2a 20 57 6f 72 6b 20 6f 75 |s();../* Work ou|
00000a70 74 20 6e 6f 2e 20 6f 66 20 61 6e 69 6d 61 74 69 |t no. of animati|
00000a80 6f 6e 20 66 72 61 6d 65 73 20 68 61 76 65 20 70 |on frames have p|
00000a90 61 73 73 65 64 20 62 79 20 28 3d 66 72 61 6d 65 |assed by (=frame|
00000aa0 73 29 20 2a 2f 0a 0a 20 20 20 20 64 6f 0a 20 20 |s) */.. do. |
00000ab0 20 20 7b 0a 20 20 20 20 20 20 53 57 49 28 30 2c | {. SWI(0,|
00000ac0 20 31 2c 20 53 57 49 5f 4f 53 5f 52 65 61 64 4d | 1, SWI_OS_ReadM|
00000ad0 6f 6e 6f 74 6f 6e 69 63 54 69 6d 65 2c 20 26 65 |onotonicTime, &e|
00000ae0 6e 64 5f 74 69 6d 65 29 3b 0a 20 20 20 20 20 20 |nd_time);. |
00000af0 66 72 61 6d 65 73 20 3d 20 28 20 28 65 6e 64 5f |frames = ( (end_|
00000b00 74 69 6d 65 20 2d 20 73 74 61 72 74 5f 74 69 6d |time - start_tim|
00000b10 65 29 20 3c 3c 20 31 20 29 3b 0a 20 20 20 20 7d |e) << 1 );. }|
00000b20 20 77 68 69 6c 65 20 28 66 72 61 6d 65 73 20 3d | while (frames =|
00000b30 3d 20 30 29 3b 0a 0a 2f 2a 20 4d 6f 76 65 20 63 |= 0);../* Move c|
00000b40 69 72 63 6c 65 73 20 6f 6e 20 62 79 20 73 70 65 |ircles on by spe|
00000b50 63 69 66 69 65 64 20 6e 6f 2e 20 6f 66 20 66 72 |cified no. of fr|
00000b60 61 6d 65 73 2c 20 72 65 6d 65 6d 62 65 72 69 6e |ames, rememberin|
00000b70 67 20 74 6f 20 72 65 73 74 61 72 74 0a 2a 2a 20 |g to restart.** |
00000b80 74 68 65 20 74 69 6d 65 72 20 68 65 72 65 2c 20 |the timer here, |
00000b90 73 69 6e 63 65 20 74 68 69 73 20 6e 6f 77 20 63 |since this now c|
00000ba0 6f 75 6e 74 73 20 61 73 20 70 61 72 74 20 6f 66 |ounts as part of|
00000bb0 20 74 68 65 20 74 69 6d 65 20 74 61 6b 65 6e 20 | the time taken |
00000bc0 66 6f 72 0a 2a 2a 20 74 68 65 20 6e 65 78 74 20 |for.** the next |
00000bd0 66 72 61 6d 65 2e 0a 2a 2f 0a 0a 20 20 20 20 53 |frame..*/.. S|
00000be0 57 49 28 30 2c 20 31 2c 20 53 57 49 5f 4f 53 5f |WI(0, 1, SWI_OS_|
00000bf0 52 65 61 64 4d 6f 6e 6f 74 6f 6e 69 63 54 69 6d |ReadMonotonicTim|
00000c00 65 2c 20 26 73 74 61 72 74 5f 74 69 6d 65 29 3b |e, &start_time);|
00000c10 0a 0a 20 20 20 20 69 66 20 28 63 6f 6d 70 65 6e |.. if (compen|
00000c20 73 61 74 65 29 0a 20 20 20 20 20 20 77 68 69 6c |sate). whil|
00000c30 65 20 28 66 72 61 6d 65 73 20 3e 20 30 29 0a 20 |e (frames > 0). |
00000c40 20 20 20 20 20 7b 0a 20 20 20 20 20 20 20 20 66 | {. f|
00000c50 6f 72 20 28 63 20 3d 20 30 3b 20 63 20 21 3d 20 |or (c = 0; c != |
00000c60 63 69 72 63 6c 65 73 3b 20 63 2b 2b 29 0a 20 20 |circles; c++). |
00000c70 20 20 20 20 20 20 7b 0a 20 20 20 20 20 20 20 20 | {. |
00000c80 20 20 63 69 72 63 6c 65 5b 63 5d 2e 78 20 3d 20 | circle[c].x = |
00000c90 63 69 72 63 6c 65 5b 63 5d 2e 78 20 2b 20 63 69 |circle[c].x + ci|
00000ca0 72 63 6c 65 5b 63 5d 2e 78 76 65 6c 3b 0a 20 20 |rcle[c].xvel;. |
00000cb0 20 20 20 20 20 20 20 20 63 69 72 63 6c 65 5b 63 | circle[c|
00000cc0 5d 2e 79 20 3d 20 63 69 72 63 6c 65 5b 63 5d 2e |].y = circle[c].|
00000cd0 79 20 2b 20 63 69 72 63 6c 65 5b 63 5d 2e 79 76 |y + circle[c].yv|
00000ce0 65 6c 3b 0a 20 20 20 20 20 20 20 20 20 20 63 69 |el;. ci|
00000cf0 72 63 6c 65 5b 63 5d 2e 73 69 7a 65 20 3d 20 63 |rcle[c].size = c|
00000d00 69 72 63 6c 65 5b 63 5d 2e 73 69 7a 65 20 2b 20 |ircle[c].size + |
00000d10 63 69 72 63 6c 65 5b 63 5d 2e 73 76 65 6c 3b 0a |circle[c].svel;.|
00000d20 20 20 20 20 20 20 20 20 20 20 69 66 20 28 63 69 | if (ci|
00000d30 72 63 6c 65 5b 63 5d 2e 78 20 3c 20 30 20 7c 7c |rcle[c].x < 0 |||
00000d40 20 63 69 72 63 6c 65 5b 63 5d 2e 78 20 3e 20 33 | circle[c].x > 3|
00000d50 32 30 29 0a 20 20 20 20 20 20 20 20 20 20 20 20 |20). |
00000d60 63 69 72 63 6c 65 5b 63 5d 2e 78 76 65 6c 20 3d |circle[c].xvel =|
00000d70 20 2d 63 69 72 63 6c 65 5b 63 5d 2e 78 76 65 6c | -circle[c].xvel|
00000d80 3b 0a 20 20 20 20 20 20 20 20 20 20 69 66 20 28 |;. if (|
00000d90 63 69 72 63 6c 65 5b 63 5d 2e 79 20 3c 20 30 20 |circle[c].y < 0 |
00000da0 7c 7c 20 63 69 72 63 6c 65 5b 63 5d 2e 79 20 3e ||| circle[c].y >|
00000db0 20 32 35 36 29 0a 20 20 20 20 20 20 20 20 20 20 | 256). |
00000dc0 20 20 63 69 72 63 6c 65 5b 63 5d 2e 79 76 65 6c | circle[c].yvel|
00000dd0 20 3d 20 2d 63 69 72 63 6c 65 5b 63 5d 2e 79 76 | = -circle[c].yv|
00000de0 65 6c 3b 0a 20 20 20 20 20 20 20 20 20 20 69 66 |el;. if|
00000df0 20 28 63 69 72 63 6c 65 5b 63 5d 2e 73 69 7a 65 | (circle[c].size|
00000e00 20 3c 20 30 20 7c 7c 20 63 69 72 63 6c 65 5b 63 | < 0 || circle[c|
00000e10 5d 2e 73 69 7a 65 20 3e 20 31 30 30 29 0a 20 20 |].size > 100). |
00000e20 20 20 20 20 20 20 20 20 20 20 63 69 72 63 6c 65 | circle|
00000e30 5b 63 5d 2e 73 76 65 6c 20 3d 20 2d 63 69 72 63 |[c].svel = -circ|
00000e40 6c 65 5b 63 5d 2e 73 76 65 6c 3b 0a 20 20 20 20 |le[c].svel;. |
00000e50 20 20 20 20 7d 0a 20 20 20 20 20 20 20 20 66 72 | }. fr|
00000e60 61 6d 65 73 2d 2d 3b 0a 20 20 20 20 20 20 7d 0a |ames--;. }.|
00000e70 0a 20 20 7d 0a 20 20 72 65 74 75 72 6e 28 30 29 |. }. return(0)|
00000e80 3b 0a 7d 0a |;.}.|
00000e84 
.