Allow user to have finer control on fire params

Plus numerous fixes

args.h

@@ -3,9 +3,10 @@
 // by 20h
 //
 
-// This file is was proudly stol^Hborrowed
+// This file was proudly stol^Hborrowed
-// from the st project and is copyright all
+// from the st project.
-// st contributors. View the LICENSE at:
+//
+// (c) all st contributors. View the LICENSE at:
 // https://git.suckless.org/st/file/LICENSE.html
 
 
@@ -24,6 +25,10 @@ extern char *argv0;
 
 typedef struct Options {
 	size_t refresh_rate;
+	size_t max_heat_loss;
+	size_t wind;
+	size_t random_factor;
+	bool random_wind;
 	bool truecolor;
 } Options;
 

colors.h

@@ -2,7 +2,6 @@
 #define COLORS_INCLUDED
 
 #include "termbox.h"
-#define CLRS_LEN	13
 
 #ifdef __OpenBSD__
 #include "sys/types.h"
@@ -10,12 +9,9 @@
 #include "stdint.h"
 #endif
 
-#define RED	0xdd1111
 #define BLACK 0x000000
-#define YELLOW	0xff7700
-#define WHITE	0xffffff
 
-struct tb_cell normcolors[CLRS_LEN] =
+struct tb_cell normcolors[13] =
 {
 	// default
 	{ ' ',    9, 0 },
@@ -39,28 +35,42 @@ struct tb_cell normcolors[CLRS_LEN] =
 	{ 0x2588, 8, 2 },
 };
 
-struct tb_cell truecolors[CLRS_LEN] =
+struct tb_cell truecolors[36] = {
-{
+	{ ' ', BLACK, 0x070707 },
-	// default
+	{ ' ', BLACK, 0x1F0707 },
-	{ ' ',          9, 0 },
+	{ ' ', BLACK, 0x2F0F07 },
-
+	{ ' ', BLACK, 0x470F07 },
-	// red/black
+	{ ' ', BLACK, 0x571707 },
-	{ 0x2591, RED,  BLACK },
+	{ ' ', BLACK, 0x671F07 },
-	{ 0x2592, RED,  BLACK },
+	{ ' ', BLACK, 0x771F07 },
-	{ 0x2593, RED,  BLACK },
+	{ ' ', BLACK, 0x8F2707 },
-	{ 0x2588, RED,  BLACK },
+	{ ' ', BLACK, 0x9F2F07 },
-
+	{ ' ', BLACK, 0xAF3F07 },
-	// yellow/red
+	{ ' ', BLACK, 0xBF4707 },
-	{ 0x2591, YELLOW, RED },
+	{ ' ', BLACK, 0xC74707 },
-	{ 0x2592, YELLOW, RED },
+	{ ' ', BLACK, 0xDF4F07 },
-	{ 0x2593, YELLOW, RED },
+	{ ' ', BLACK, 0xDF5707 },
-	{ 0x2588, YELLOW, RED },
+	{ ' ', BLACK, 0xDF5707 },
-
+	{ ' ', BLACK, 0xD75F07 },
-	// white/red
+	{ ' ', BLACK, 0xD7670F },
-	{ 0x2591, WHITE,  RED },
+	{ ' ', BLACK, 0xCF6F0F },
-	{ 0x2592, WHITE,  RED },
+	{ ' ', BLACK, 0xCF770F },
-	{ 0x2593, WHITE,  RED },
+	{ ' ', BLACK, 0xCF7F0F },
-	{ 0x2588, WHITE,  RED },
+	{ ' ', BLACK, 0xCF8717 },
+	{ ' ', BLACK, 0xC78717 },
+	{ ' ', BLACK, 0xC78F17 },
+	{ ' ', BLACK, 0xC7971F },
+	{ ' ', BLACK, 0xBF9F1F },
+	{ ' ', BLACK, 0xBF9F1F },
+	{ ' ', BLACK, 0xBFA727 },
+	{ ' ', BLACK, 0xBFA727 },
+	{ ' ', BLACK, 0xBFAF2F },
+	{ ' ', BLACK, 0xB7AF2F },
+	{ ' ', BLACK, 0xB7B737 },
+	{ ' ', BLACK, 0xCFCF6F },
+	{ ' ', BLACK, 0xDFDF9F },
+	{ ' ', BLACK, 0xEFEFC7 },
+	{ ' ', BLACK, 0xFFFFFF }
 };
 
 #endif

draw.c

@@ -14,6 +14,9 @@
 #include "stdint.h"
 #endif
 
+#define MAX(VAL1, VAL2)    ((VAL1) > (VAL2) ? (VAL1) : (VAL2))
+#define MIN(VAL1, VAL2)    ((VAL1) < (VAL2) ? (VAL1) : (VAL2))
+
 // arguments
 extern struct Options *opts;
 
@@ -46,16 +49,34 @@ void
 dofire(struct buffer *buf)
 {
 	size_t src;
-	size_t random;
+	size_t random = (rand() % 7) & 3;
 	size_t dest;
 
 	struct tb_cell *realbuf = tb_cell_buffer();
 
 	for (size_t x = 0; x < buf->width; ++x) {
 		for (size_t y = 1; y < buf->height; ++y) {
-			src = y * buf->width + x;
+			if ((rand() % opts->random_factor) == 0) {
 				random = (rand() % 7) & 3;
-			dest = src - random + 1;
+			}
+
+			src = y * buf->width + x;
+
+			if (opts->random_wind) {
+				dest = src - random + opts->wind;
+			} else {
+				dest = src + opts->wind;
+			}
+
+			size_t max_value;
+			struct tb_cell *colors;
+			if (opts->truecolor == TRUE) {
+				colors = (struct tb_cell*) &truecolors;
+				max_value = 35;
+			} else {
+				colors = (struct tb_cell*) &normcolors;
+				max_value = 12;
+			}
 
 			if (buf->width > dest) {
 				dest = 0;
@@ -63,19 +84,13 @@ dofire(struct buffer *buf)
 				dest -= buf->width;
 			}
 
-			buf->buf[dest] = buf->buf[src] - (random & 1);
+			size_t loss = MIN(opts->max_heat_loss, 3);
+			buf->buf[dest] = MAX(buf->buf[src] - (random & loss), 0);
 
-			if (buf->buf[dest] > 12) {
+			if (buf->buf[dest] > max_value) {
 				buf->buf[dest] = 0;
 			}
 
-			struct tb_cell *colors;
-			if (opts->truecolor == TRUE) {
-				colors = (struct tb_cell*) &truecolors;
-			} else {
-				colors = (struct tb_cell*) &normcolors;
-			}
-
 			realbuf[dest] = colors[buf->buf[dest]];
 			realbuf[src]  = colors[buf->buf[src]];
 		}

main.c

@@ -19,9 +19,9 @@ char *argv0;
 struct Options *opts;
 
 int
-main ( int argc, char *argv[] )
+main(int argc, char *argv[])
 {
-	opts = (struct Options*) calloc(1, sizeof(struct Options*));
+	opts = (struct Options*) calloc(1, sizeof(struct Options));
 	if (opts == NULL) {
 		perror("fire: error: calloc()");
 	}
@@ -30,6 +30,10 @@ main ( int argc, char *argv[] )
 	opts->refresh_rate  = 5;
 	size_t output_mode  = TB_OUTPUT_NORMAL;
 	opts->truecolor     = FALSE;
+	opts->max_heat_loss = 1;
+	opts->wind          = 1;
+	opts->random_wind   = TRUE;
+	opts->random_factor = 4;
 
 	// argument parsing
 	argv0 = argv[0];
@@ -42,18 +46,44 @@ main ( int argc, char *argv[] )
 		case 'r':
 			opts->refresh_rate = atoi(ARGF());
 			break;
+		case 'l':
+			opts->max_heat_loss = atoi(ARGF());
+			break;
+		case 'w':
+			opts->wind = atoi(ARGF());
+			break;
+		case 'R':
+			opts->random_wind = FALSE;
+			break;
+		case 'f':
+			opts->random_factor = atoi(ARGF());
+			break;
 		case 'V':
 			printf("%s %s\n", argv0, VERSION);
 			return 0;
 		case 'h':
 		default:
-			printf("Usage: %s [-tVh] [-r rate]\n", argv0);
+			printf("Usage: %s [-RtVh] [-r speed] [-l loss] [-w wind] [-f fact]\n", argv0);
 			printf("Display a nice fiery animation.\n\n");
 			printf("ARGUMENTS:\n");
-			printf("    -r [rate]   Change refresh rate. (default: 5)\n");
+			printf("    -r [speed]   Change refresh rate. (default: 5)\n");
+			printf("    -l [loss]    Maximum heat loss for each row upward. (default: 1)\n");
+			printf("                 Higher values will lead to a smaller fire.\n");
+			printf("    -w [wind]    Wind. Negative values, or values less than one will\n");
+			printf("                 cause the fire to be blown west. (default: 1)\n");
+			printf("                 To disable wind, set this value to 0 and use the -R flag.\n");
+			printf("    -f [fact]    Set the chance of the random value being refreshed\n");
+			printf("                 for each tile in the fire animation. (default: 4)\n");
+			printf("                 High values will cause a matrix-like effect.\n");
+			printf("    -R           Disable random wind factor.\n");
 			printf("    -t           Enable truecolor. (Will not work on *rxvt)\n");
 			printf("    -h           Display this help message and exit.\n");
 			printf("    -V           Display version and exit.\n\n");
+			printf("EXAMPLES:\n");
+			printf("    %s                    'Normal' fire.\n");
+			printf("    %s -Rw0 -f100         Cmatrix-esque effect.\n");
+			printf("    %s -l2 -w2            Small fire with wind blowing east.\n");
+			printf("    %s -Rw0 -f10000000    Heatwaves!\n");
 			printf("(c) Kiëd Llaentenn, nullgemm\n");
 			printf("https://github.com/lptstr/fire\n");
 

makefile

@@ -11,7 +11,7 @@ WARNING	= -Wall -Wextra -pedantic -Wmissing-prototypes \
 INC	= -Isub/termbox_next/src
 
 CC	= gcc
-CFLAGS	= -std=c99 -O3 $(WARNING) $(INC)
+CFLAGS	= -std=c99 $(WARNING) $(INC) -fsanitize=address -Og -ggdb
 LDFLAGS	=
 
 TRMBOX	= sub/termbox_next/bin/termbox.a