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Dynamic Game Mode Switching

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This commit is contained in:
TheBrokenRail 2020-10-02 17:06:03 -04:00
parent a2da72c940
commit 121a92f5ac
1 changed files with 45 additions and 24 deletions
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69
mods/src/extra.c
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@ -3,11 +3,7 @@
#include <libcore/libcore.h>
static int32_t get_game_type(__attribute__((unused)) int32_t level_data) {
return 0;
}
static uint32_t can_spawn_mobs(__attribute__((unused)) int32_t obj) {
static uint32_t getSpawnMobs_injection(__attribute__((unused)) int32_t obj) {
return 1;
}
@ -21,7 +17,7 @@ typedef void (*handle_input_t)(unsigned char *, unsigned char *, unsigned char *
static handle_input_t handle_input = (handle_input_t) 0x15ffc;
static void *handle_input_original = NULL;
static int is_survival = 0;
static int is_survival = -1;
static void handle_input_injection(unsigned char *param_1, unsigned char *param_2, unsigned char *param_3, unsigned char *param_4) {
// Call Original Method
@ -88,29 +84,54 @@ static int has_feature(const char *name) {
extern unsigned char *readAssetFile(unsigned char *app_platform, unsigned char *path);
extern void openTextEdit(unsigned char *local_player, unsigned char *sign);
// Patch Game Mode
static void set_is_survival(int new_is_survival) {
if (is_survival != new_is_survival) {
fprintf(stderr, "Setting Game Mode: %s\n", new_is_survival ? "Survival" : "Creative");
// Correct Inventpry UI
unsigned char inventory_patch[4] = {new_is_survival ? 0x00 : 0x01, 0x30, 0xa0, 0xe3};
patch((void *) 0x16efc, inventory_patch);
// Replace Creative Mode VTable With Correct VTable
unsigned char creative_vtable_patch[4] = {0x00, 0x2d, 0x10, 0x00};
unsigned char survival_vtable_patch[4] = {0x60, 0x2f, 0x10, 0x00};
patch((void *) 0x1a0d8, new_is_survival ? survival_vtable_patch : creative_vtable_patch);
// Use Correct Size For Game Mode Object
unsigned char size_patch[4] = {new_is_survival ? 0x24 : 0x20, 0x00, 0xa0, 0xe3};
patch((void *) 0x1a054, size_patch);
is_survival = new_is_survival;
}
}
typedef void (*setIsCreativeMode_t)(unsigned char *, int32_t);
static setIsCreativeMode_t setIsCreativeMode = (setIsCreativeMode_t) 0x16ec4;
static void *setIsCreativeMode_original = NULL;
static void setIsCreativeMode_injection(unsigned char *this, int32_t new_game_mode) {
set_is_survival(!new_game_mode);
revert_overwrite((void *) setIsCreativeMode, setIsCreativeMode_original);
(*setIsCreativeMode)(this, new_game_mode);
revert_overwrite((void *) setIsCreativeMode, setIsCreativeMode_original);
}
__attribute__((constructor)) static void init() {
if (has_feature("Touch GUI")) {
// Use Touch UI
unsigned char patch_data[4] = {0x01, 0x00, 0x50, 0xe3};
patch((void *) 0x292fc, patch_data);
unsigned char touch_gui_patch[4] = {0x01, 0x00, 0x50, 0xe3};
patch((void *) 0x292fc, touch_gui_patch);
}
is_survival = has_feature("Survival Mode");
if (is_survival) {
// Survival Mode Inventpry UI
unsigned char patch_data_2[4] = {0x00, 0x30, 0xa0, 0xe3};
patch((void *) 0x16efc, patch_data_2);
// Dyanmic Game Mode Switching
set_is_survival(0);
setIsCreativeMode_original = overwrite((void *) setIsCreativeMode, setIsCreativeMode_injection);
// Replace Creative Mode VTable With Survival Mode VTable
patch((void *) 0x1a0d8, (unsigned char *) 0x1b804);
// Use Correct Size For Survival Mode Object
unsigned char patch_data_3[4] = {0x24, 0x00, 0xa0, 0xe3};
patch((void *) 0x1a054, patch_data_3);
// Force GameType To 0 (Required For Day-Night Cycle)
overwrite((void *) 0xbabdc, get_game_type);
}
// Set Default Game Mode
unsigned char default_game_mode_patch[4] = {has_feature("Survival Mode") ? 0x00 : 0x01, 0x30, 0xa0, 0xe3};
patch((void *) 0xba744, default_game_mode_patch);
// Disable Item Dropping When Cursor Is Hidden
tickItemDrop_original = overwrite((void *) tickItemDrop, tickItemDrop_injection);
@ -130,7 +151,7 @@ __attribute__((constructor)) static void init() {
if (has_feature("Mob Spawning")) {
// Enable Mob Spawning
overwrite((void *) 0xbabec, can_spawn_mobs);
overwrite((void *) 0xbabec, getSpawnMobs_injection);
}
// Replace CreatorLevel With ServerLevel (This Fixes Beds And Mob Spawning)