Connects the random seed through all the generators

This is very untested and I'm guessing that every level will look
identical with this implementation.

Need to extend this so that generation seeds are created on boot for
every level based on the original seed.

Perhaps the "attack"/"defend" seed should also differ from the
generation seed to prevent playthroughs from becoming completely
identical.

data/mapgen.lua

@@ -43,7 +43,7 @@ local function generate_path ()
 	end
 
 	local cx, cy = 1, 1
-	local seed = time();
+	local seed = get_random_seed()
 	info("Map generation seed: " .. seed)
 	randomseed(seed)
 	local direction = 0

data/maproombuilder.lua

@@ -534,7 +534,9 @@ function module.load_textures(map)
 	t_pit0 = add_texture(map, "Objects/Pit0.png")
 	t_pit1 = add_texture(map, "Objects/Pit1.png")
 
-	math.randomseed(os.time())
+	local seed = get_random_seed();
+	info("Map room random seed: " .. seed)
+	math.randomseed(seed)
 	local xo = (random(3) - 1) * 112
 	local yo = (random(8)) * 48
 

src/main.c

@@ -1282,6 +1282,10 @@ int main(int argc, char *argv[])
 	PHYSFS_mount("data", NULL, 0);
 #endif // DEBUG
 
+	if (argc > 1) {
+		set_random_seed(atoi(argv[1]));
+	}
+
 	if (!init())
 		return 1;
 

src/map_lua.c

@@ -467,6 +467,13 @@ l_read_file(lua_State *L)
 	return 1;
 }
 
+static int
+l_get_random_seed(lua_State *L)
+{
+	lua_pushnumber(L, get_random_seed());
+	return 1;
+}
+
 static Map*
 generate_map(unsigned int level, const char *file, GameMode gameMode, SDL_Renderer *renderer)
 {
@@ -523,6 +530,9 @@ generate_map(unsigned int level, const char *file, GameMode gameMode, SDL_Render
 	lua_pushcfunction(L, l_add_monster);
 	lua_setglobal(L, "add_monster");
 
+	lua_pushcfunction(L, l_get_random_seed);
+	lua_setglobal(L, "get_random_seed");
+
 	lua_pushinteger(L, level);
 	lua_setglobal(L, "CURRENT_LEVEL");
 

src/random.c

@@ -20,6 +20,7 @@
 #include <time.h>
 #include <stdbool.h>
 #include "random.h"
+#include "util.h"
 
 static unsigned int seed = 0;
 
@@ -29,11 +30,19 @@ init_seed(void)
 	if (seed == 0) {
 		seed = (unsigned int) time(NULL);
 		srand(seed);
+		info("Core random seed: %d", seed);
 	}
 }
 
+void
+set_random_seed(unsigned int s)
+{
+	seed = s;
+	info("Core random seed: %d", seed);
+}
+
 unsigned int
-get_seed(void)
+get_random_seed(void)
 {
 	init_seed();
 	return seed;
@@ -45,4 +54,3 @@ get_random(unsigned int max)
 	init_seed();
 	return rand() % (max + 1);
 }
-

src/random.h

@@ -20,7 +20,10 @@
 #define	RANDOM_H_
 
 unsigned int
-get_seed(void);
+get_random_seed(void);
+
+void
+set_random_seed(unsigned int s);
 
 unsigned int
 get_random(unsigned int max);