Home » Archimedes archive » Acorn User » AU 1996-Xmas.adf » Features » Arcade/!Popcorn/c/Process
Arcade/!Popcorn/c/Process
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-Xmas.adf » Features |
| Filename: | Arcade/!Popcorn/c/Process |
| Read OK: | ✔ |
| File size: | 114C bytes |
| Load address: | 0000 |
| Exec address: | 0000 |
File contents
#include "Popcorn:h.Popcorn"
void Popcorn_Process(struct object_table* table, BOOL plot, int moves)
{
register int scan;
struct game_object *obj;
union object_flags reason;
if (table->collisions != NULL)
table->collisions->entries = 0;
for (; moves!=0; moves--)
{
scan = 0;
while (scan != table->max_objects)
{
obj = &(table->object[scan]);
if (obj->object_id != 0)
{
if (obj->flags.bits.gravity)
{
obj->xv=obj->xv+table->grav_x;
obj->yv=obj->yv+table->grav_y;
}
if (obj->flags.bits.velocities)
{
obj->x=obj->x + obj->xv;
obj->y=obj->y + obj->yv;
}
reason.word = 0;
obj->timer.value = obj->timer.value - obj->timer.decrement;
if (obj->flags.bits.attn_every)
reason.bits.attn_every = 1;
if (obj->flags.bits.attn_plot && plot)
reason.bits.attn_plot = 1;
if (obj->flags.bits.attn_timer && obj->timer.value <= 0)
reason.bits.attn_timer = 1;
if (obj->flags.bits.attn_plotout && Popcorn_Outside(obj, &plot_window))
reason.bits.attn_plotout = 1;
if (obj->flags.bits.attn_gameout && Popcorn_Outside(obj, &game_window))
reason.bits.attn_gameout = 1;
if (obj->flags.bits.attn_userout && Popcorn_Outside(obj, &user_window))
reason.bits.attn_userout = 1;
if (obj->flags.bits.animate)
{
if (obj->flags.bits.yoyo) /* Sort out yoyo animation; fiddly in C! */
{
if (obj->flags.bits.yoyo_dec)
{
obj->frame = obj->frame - 1;
if (obj->frame == -1)
{ obj->frame++; obj->flags.bits.yoyo_dec = FALSE; }
}
else
{
obj->frame = obj->frame + 1;
if (obj->frame == obj->plot_id.animation->frames)
{ obj->frame--; obj->flags.bits.yoyo_dec = TRUE; }
}
}
else
{
obj->frame++;
if (obj->frame == obj->plot_id.animation->frames)
obj->frame = 0;
}
obj->size.x = obj->plot_id.animation->frame[obj->frame].size_x;
obj->size.y = obj->plot_id.animation->frame[obj->frame].size_y;
obj->plot_offset.x=obj->plot_id.animation->frame[obj->frame].centre_x;
obj->plot_offset.y=obj->plot_id.animation->frame[obj->frame].centre_y;
}
if (obj->handler != NULL && reason.word != 0)
(obj->handler)((void*) obj, reason, NULL);
if (obj->flags.bits.std_plot && plot && obj->flags.bits.animate && moves == 1)
Popcorn_PlotSprite(*obj->plot_id.animation->frame[obj->frame].sprite_anchor,
(obj->x >> 12) - (obj->plot_offset.x),
(obj->y >> 12) - (obj->plot_offset.y) );
if (obj->flags.bits.std_plot && plot && !obj->flags.bits.animate && moves == 1)
Popcorn_PlotSprite(*obj->plot_id.sprite_anchor,
(obj->x >> 12) - (obj->plot_offset.x),
(obj->y >> 12) - (obj->plot_offset.y) );
if ((obj->flags.bits.kill_timer && obj->timer.value <= 0)
|| (obj->flags.bits.kill_plotout && Popcorn_Outside(obj, &plot_window))
|| (obj->flags.bits.kill_gameout && Popcorn_Outside(obj, &game_window))
|| (obj->flags.bits.kill_userout && Popcorn_Outside(obj, &user_window))
) Popcorn_DeleteObject(obj);
if (obj->flags.bits.collide && table->collisions != NULL && obj->object_id != 0 && moves == 1)
{
table->collisions->collision[table->collisions->entries].x0
= (obj->x>>12) - obj->plot_offset.x;
table->collisions->collision[table->collisions->entries].y0
= (obj->y>>12) - obj->plot_offset.y;
table->collisions->collision[table->collisions->entries].x1
= table->collisions->collision[table->collisions->entries].x0
+ obj->size.x;
table->collisions->collision[table->collisions->entries].y1
= table->collisions->collision[table->collisions->entries].y0
+ obj->size.y;
table->collisions->collision[table->collisions->entries].back_ptr
= obj;
table->collisions->entries++;
}
}
scan++;
}
}
}
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00000020 69 64 20 50 6f 70 63 6f 72 6e 5f 50 72 6f 63 65 |id Popcorn_Proce|
00000030 73 73 28 73 74 72 75 63 74 20 6f 62 6a 65 63 74 |ss(struct object|
00000040 5f 74 61 62 6c 65 2a 20 74 61 62 6c 65 2c 20 42 |_table* table, B|
00000050 4f 4f 4c 20 70 6c 6f 74 2c 20 69 6e 74 20 6d 6f |OOL plot, int mo|
00000060 76 65 73 29 0a 7b 0a 20 20 72 65 67 69 73 74 65 |ves).{. registe|
00000070 72 20 69 6e 74 20 20 20 20 20 20 20 20 20 20 73 |r int s|
00000080 63 61 6e 3b 0a 20 20 73 74 72 75 63 74 20 67 61 |can;. struct ga|
00000090 6d 65 5f 6f 62 6a 65 63 74 20 20 20 20 2a 6f 62 |me_object *ob|
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000000b0 74 5f 66 6c 61 67 73 20 20 20 20 72 65 61 73 6f |t_flags reaso|
000000c0 6e 3b 0a 0a 0a 20 20 69 66 20 28 74 61 62 6c 65 |n;... if (table|
000000d0 2d 3e 63 6f 6c 6c 69 73 69 6f 6e 73 20 21 3d 20 |->collisions != |
000000e0 4e 55 4c 4c 29 0a 20 20 20 20 74 61 62 6c 65 2d |NULL). table-|
000000f0 3e 63 6f 6c 6c 69 73 69 6f 6e 73 2d 3e 65 6e 74 |>collisions->ent|
00000100 72 69 65 73 20 3d 20 30 3b 0a 0a 20 20 66 6f 72 |ries = 0;.. for|
00000110 20 28 3b 20 6d 6f 76 65 73 21 3d 30 3b 20 6d 6f | (; moves!=0; mo|
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000009b0 65 6e 74 72 65 5f 79 3b 0a 20 20 20 20 20 20 20 |entre_y;. |
000009c0 20 7d 0a 0a 20 20 20 20 20 20 20 20 69 66 20 28 | }.. if (|
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000009f0 6f 72 64 20 21 3d 20 30 29 0a 20 20 20 20 20 20 |ord != 0). |
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00000a10 72 29 28 28 76 6f 69 64 2a 29 20 6f 62 6a 2c 20 |r)((void*) obj, |
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00000b00 2d 3e 78 20 3e 3e 20 31 32 29 20 2d 20 28 6f 62 |->x >> 12) - (ob|
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00000b30 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | |
00000b40 20 28 6f 62 6a 2d 3e 79 20 3e 3e 20 31 32 29 20 | (obj->y >> 12) |
00000b50 2d 20 28 6f 62 6a 2d 3e 70 6c 6f 74 5f 6f 66 66 |- (obj->plot_off|
00000b60 73 65 74 2e 79 29 20 29 3b 0a 0a 20 20 20 20 20 |set.y) );.. |
00000b70 20 20 20 69 66 20 28 6f 62 6a 2d 3e 66 6c 61 67 | if (obj->flag|
00000b80 73 2e 62 69 74 73 2e 73 74 64 5f 70 6c 6f 74 20 |s.bits.std_plot |
00000b90 26 26 20 70 6c 6f 74 20 26 26 20 21 6f 62 6a 2d |&& plot && !obj-|
00000ba0 3e 66 6c 61 67 73 2e 62 69 74 73 2e 61 6e 69 6d |>flags.bits.anim|
00000bb0 61 74 65 20 26 26 20 6d 6f 76 65 73 20 3d 3d 20 |ate && moves == |
00000bc0 31 29 0a 20 20 20 20 20 20 20 20 20 20 50 6f 70 |1). Pop|
00000bd0 63 6f 72 6e 5f 50 6c 6f 74 53 70 72 69 74 65 28 |corn_PlotSprite(|
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00000bf0 72 69 74 65 5f 61 6e 63 68 6f 72 2c 0a 20 20 20 |rite_anchor,. |
00000c00 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | |
00000c10 20 20 20 20 20 20 20 20 20 28 6f 62 6a 2d 3e 78 | (obj->x|
00000c20 20 3e 3e 20 31 32 29 20 2d 20 28 6f 62 6a 2d 3e | >> 12) - (obj->|
00000c30 70 6c 6f 74 5f 6f 66 66 73 65 74 2e 78 29 2c 0a |plot_offset.x),.|
00000c40 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | |
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00000cd0 20 7c 7c 20 28 6f 62 6a 2d 3e 66 6c 61 67 73 2e | || (obj->flags.|
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00000db0 72 5f 77 69 6e 64 6f 77 29 29 0a 20 20 20 20 20 |r_window)). |
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00000dd0 44 65 6c 65 74 65 4f 62 6a 65 63 74 28 6f 62 6a |DeleteObject(obj|
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00000e20 4e 55 4c 4c 20 26 26 20 6f 62 6a 2d 3e 6f 62 6a |NULL && obj->obj|
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00000fb0 6f 6e 5b 74 61 62 6c 65 2d 3e 63 6f 6c 6c 69 73 |on[table->collis|
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00000fd0 30 0a 20 20 20 20 20 20 20 20 20 20 20 20 2b 20 |0. + |
00000fe0 6f 62 6a 2d 3e 73 69 7a 65 2e 78 3b 0a 0a 20 20 |obj->size.x;.. |
00000ff0 20 20 20 20 20 20 20 20 74 61 62 6c 65 2d 3e 63 | table->c|
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00001020 69 73 69 6f 6e 73 2d 3e 65 6e 74 72 69 65 73 5d |isions->entries]|
00001030 2e 79 31 0a 20 20 20 20 20 20 20 20 20 20 20 3d |.y1. =|
00001040 20 74 61 62 6c 65 2d 3e 63 6f 6c 6c 69 73 69 6f | table->collisio|
00001050 6e 73 2d 3e 63 6f 6c 6c 69 73 69 6f 6e 5b 74 61 |ns->collision[ta|
00001060 62 6c 65 2d 3e 63 6f 6c 6c 69 73 69 6f 6e 73 2d |ble->collisions-|
00001070 3e 65 6e 74 72 69 65 73 5d 2e 79 30 0a 20 20 20 |>entries].y0. |
00001080 20 20 20 20 20 20 20 20 20 2b 20 6f 62 6a 2d 3e | + obj->|
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000010b0 69 6f 6e 73 2d 3e 63 6f 6c 6c 69 73 69 6f 6e 5b |ions->collision[|
000010c0 74 61 62 6c 65 2d 3e 63 6f 6c 6c 69 73 69 6f 6e |table->collision|
000010d0 73 2d 3e 65 6e 74 72 69 65 73 5d 2e 62 61 63 6b |s->entries].back|
000010e0 5f 70 74 72 0a 20 20 20 20 20 20 20 20 20 20 20 |_ptr. |
000010f0 3d 20 6f 62 6a 3b 0a 0a 20 20 20 20 20 20 20 20 |= obj;.. |
00001100 20 20 74 61 62 6c 65 2d 3e 63 6f 6c 6c 69 73 69 | table->collisi|
00001110 6f 6e 73 2d 3e 65 6e 74 72 69 65 73 2b 2b 3b 0a |ons->entries++;.|
00001120 20 20 20 20 20 20 20 20 7d 0a 20 20 20 20 20 20 | }. |
00001130 7d 0a 20 20 20 20 20 20 73 63 61 6e 2b 2b 3b 0a |}. scan++;.|
00001140 20 20 20 20 7d 0a 20 20 7d 0a 7d 0a | }. }.}.|
0000114c 
.