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Optimized and cleaned-up 'smoke.c' (smoke effect).

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stainless
2001-11-14 09:55:15 +00:00
parent 1ef0eba904
commit c446309ddc
2 changed files with 49 additions and 18 deletions
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4
zsnes/src/makefile.dos
View File

@@ -59,7 +59,9 @@ MAINOBJ=cfgload.o endmem.o fixsin.o init.o ui.o vcache.o water.o smoke.o
OBJS=${CHIPSOBJ} ${CPUOBJ} ${DOSOBJ} ${GUIOBJ} ${VIDEOBJ} ${PREOBJ} ${MAINOBJ} ${ZIPOBJ}
LIBS=-lz -lm -lpng
CFLAGS=-O2 -Wall -Wno-unused -D__MSDOS__
#CFLAGS=-O2 -Wall -Wno-unused -D__MSDOS__
CFLAGS=-O3 -march=i486 -mpentium -fno-rtti -fno-exceptions -ffast-math\
-fomit-frame-pointer -fno-unroll-loops -Wall -Wno-unused -D__MSDOS__
ASM=nasm
ASMFLAGS=-f coff -D__MSDOS__
CC=gcc

63
zsnes/src/smoke.c
View File

@@ -5,20 +5,27 @@
#else
# include <stdlib.h>
# include <string.h>
# include <time.h>
#endif
// Ripped from an Allegro example (exflame.c). :P
// Should be fire, but looks more like smoke in ZSNES.
/*
#define MIN(x,y) \
Ripped from an Allegro example (exflame.c). :)
Should be fire, but looks more like smoke in ZSNES.
*/
#define MIN(x, y) \
(((x) < (y)) ? (x) : (y))
#define ABS(x) \
(((x) >= 0) ? (x) : ( - (x)))
#define FIRE_HOTSPOTS 80
#define FIRE_HOTSPOTS 80
static int fire_hotspot [FIRE_HOTSPOTS];
@@ -26,9 +33,9 @@ static int fire_hotspot [FIRE_HOTSPOTS];
extern char * vidbuffer;
#define SCRW 288
#define SCRW 288
#define SCRH 224
#define SCRH 224
static unsigned char fire_line [SCRW];
@@ -39,11 +46,13 @@ static unsigned char fire_buffer [SCRW * SCRH];
static int fire_init_flag;
static void draw_bottom_line_of_fire (void)
static __inline__ void draw_bottom_line_of_fire (void)
{
int count, count2;
int count, count2;
memset ((& fire_line), 0, SCRW);
memset (&fire_line, 0, SCRW);
for (count = 0; count < FIRE_HOTSPOTS; count ++)
{
@@ -53,13 +62,15 @@ static void draw_bottom_line_of_fire (void)
if ((count2 >= 0) && (count2 < SCRW))
{
fire_line [count2] =
MIN((fire_line [count2] + 20) -
ABS(fire_hotspot [count] - count2), 256);
MIN ((fire_line [count2] + 20) -
ABS (fire_hotspot [count] - count2), 256);
}
}
fire_hotspot [count] += ((rand () & 7) - 3);
if (fire_hotspot [count] < 0)
{
fire_hotspot [count] += SCRW;
@@ -70,74 +81,91 @@ static void draw_bottom_line_of_fire (void)
}
}
for (count = 0; count < SCRW; count ++)
{
fire_buffer [((SCRH - 1) *
(SCRW)) + count] = fire_line [count];
(SCRW)) + count] = fire_line [count];
}
}
static void InitFire (void)
static __inline__ void init_fire (void)
{
int x, y, pixel, count;
srand (time (0));
for (count = 0; count < FIRE_HOTSPOTS; count ++)
{
fire_hotspot [count] = (rand () % SCRW);
}
for (count = 0; count < SCRH; count ++)
{
draw_bottom_line_of_fire ();
for (y = 0; y < (SCRH - 1); y ++)
{
for (x = 0; x < SCRW; x ++)
{
pixel = fire_buffer [((y + 1) * SCRW) + x];
if (pixel > 0)
{
pixel --;
}
fire_buffer [(y * SCRW) + x] = pixel;
}
}
}
fire_init_flag = 1;
}
// void DrawFire (void)
/* void DrawFire (void) */
void DrawSmoke (void)
{
int x, y, pixel, pixel2;
if (fire_init_flag != 1)
if (! fire_init_flag)
{
InitFire ();
init_fire ();
}
draw_bottom_line_of_fire ();
for (y = 0; y < (SCRH - 1); y ++)
{
for (x = 0; x < SCRW; x ++)
{
pixel = fire_buffer [((y + 1) * SCRW) + x];
if (pixel > 0)
{
pixel --;
}
fire_buffer [(y * SCRW) + x] = pixel;
}
}
for (y = 0; y < SCRH; y ++)
{
for (x = 0; x < SCRW; x ++)
@@ -146,6 +174,7 @@ void DrawSmoke (void)
pixel2 = (fire_buffer [(y * SCRW) + x] / 8);
if (pixel2 > pixel)
{
vidbuffer [(y * SCRW) + x] = pixel2;