311 lines
12 KiB
C++
311 lines
12 KiB
C++
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#include <libreborn/libreborn.h>
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#include <symbols/minecraft.h>
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#include <mods/feature/feature.h>
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#include <mods/init/init.h>
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#include <mods/misc/misc.h>
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// Items
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unsigned char *bucket = NULL;
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// Description And Texture
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static std::string BucketItem_getDescriptionId(__attribute__((unused)) unsigned char *item, const ItemInstance *item_instance) {
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if (item_instance->auxiliary == *(int32_t *) (*Tile_water + Tile_id_property_offset)) {
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return "item.bucketWater";
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} else if (item_instance->auxiliary == *(int32_t *) (*Tile_lava + Tile_id_property_offset)) {
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return "item.bucketLava";
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} else {
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return "item.bucket";
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}
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}
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static int32_t BucketItem_getIcon(__attribute__((unused)) unsigned char *item, int32_t auxiliary) {
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if (auxiliary == *(int32_t *) (*Tile_water + Tile_id_property_offset)) {
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return 75;
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} else if (auxiliary == *(int32_t *) (*Tile_lava + Tile_id_property_offset)) {
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return 76;
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} else {
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return 74;
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}
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}
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// Use Bucket
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static int32_t BucketItem_useOn(__attribute__((unused)) unsigned char *item, ItemInstance *item_instance, unsigned char *player, unsigned char *level, int32_t x, int32_t y, int32_t z, int32_t hit_side, __attribute__((unused)) float hit_x, __attribute__((unused)) float hit_y, __attribute__((unused)) float hit_z) {
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if (item_instance->count < 1) {
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return 0;
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}
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if (item_instance->auxiliary == 0) {
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// Empty Bucket
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int32_t new_auxiliary = 0;
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int32_t tile = (*Level_getTile)(level, x, y, z);
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if (tile == *(int32_t *) (*Tile_calmWater + Tile_id_property_offset)) {
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new_auxiliary = *(int32_t *) (*Tile_water + Tile_id_property_offset);
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} else if (tile == *(int32_t *) (*Tile_calmLava + Tile_id_property_offset)) {
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new_auxiliary = *(int32_t *) (*Tile_water + Tile_id_property_offset);
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}
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if (new_auxiliary != 0) {
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// Valid
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bool success = false;
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if (item_instance->count == 1) {
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item_instance->auxiliary = new_auxiliary;
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success = true;
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} else {
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ItemInstance new_item;
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new_item.id = *(int32_t *) (bucket + Item_id_property_offset);
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new_item.count = 1;
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new_item.auxiliary = new_auxiliary;
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unsigned char *inventory = *(unsigned char **) (player + Player_inventory_property_offset);
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unsigned char *inventory_vtable = *(unsigned char **) inventory;
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FillingContainer_add_t FillingContainer_add = *(FillingContainer_add_t *) (inventory_vtable + FillingContainer_add_vtable_offset);
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if ((*FillingContainer_add)(inventory, &new_item)) {
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// Added To Inventory
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success = true;
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item_instance->count -= 1;
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}
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}
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if (success) {
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(*Level_setTileAndData)(level, x, y, z, 0, 0);
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return 1;
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} else {
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return 0;
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}
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} else {
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// Invalid
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return 0;
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}
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} else {
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// Place
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switch (hit_side) {
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case 0: {
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y -= 1;
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break;
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}
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case 1: {
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y += 1;
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break;
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}
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case 2: {
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z -= 1;
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break;
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}
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case 3: {
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z += 1;
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break;
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}
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case 4: {
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x -= 1;
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break;
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}
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case 5: {
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x += 1;
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break;
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}
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}
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// Get Current Tile
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bool valid = false;
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unsigned char *material = (*Level_getMaterial)(level, x, y, z);
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if (material != NULL) {
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unsigned char *material_vtable = *(unsigned char **) material;
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Material_isSolid_t Material_isSolid = *(Material_isSolid_t *) (material_vtable + Material_isSolid_vtable_offset);
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valid = !(*Material_isSolid)(material);
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}
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if (valid) {
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(*Level_setTileAndData)(level, x, y, z, item_instance->auxiliary, 0);
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item_instance->auxiliary = 0;
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return 1;
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} else {
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return 0;
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}
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}
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}
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// Bucket VTable
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static unsigned char *get_bucket_vtable() {
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static unsigned char *vtable = NULL;
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if (vtable == NULL) {
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// Init
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vtable = (unsigned char *) malloc(ITEM_VTABLE_SIZE);
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ALLOC_CHECK(vtable);
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// Copy Old VTable
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memcpy((void *) vtable, (void *) Item_vtable, ITEM_VTABLE_SIZE);
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// Modify
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*(Item_getDescriptionId_t *) (vtable + Item_getDescriptionId_vtable_offset) = BucketItem_getDescriptionId;
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*(Item_getIcon_t *) (vtable + Item_getIcon_vtable_offset) = BucketItem_getIcon;
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*(Item_useOn_t *) (vtable + Item_useOn_vtable_offset) = BucketItem_useOn;
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}
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return vtable;
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}
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__attribute__((destructor)) static void free_bucket_vtable() {
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free(get_bucket_vtable());
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}
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// Create Items
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static unsigned char *create_bucket(int32_t id, int32_t texture_x, int32_t texture_y, const char *name) {
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// Construct
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unsigned char *item = (unsigned char *) ::operator new(ITEM_SIZE);
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ALLOC_CHECK(item);
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(*Item)(item, id);
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// Set VTable
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*(unsigned char **) item = get_bucket_vtable();
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// Get Functions
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unsigned char *vtable = *(unsigned char **) item;
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Item_setIcon_t Item_setIcon = *(Item_setIcon_t *) (vtable + Item_setIcon_vtable_offset);
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Item_setDescriptionId_t Item_setDescriptionId = *(Item_setDescriptionId_t *) (vtable + Item_setDescriptionId_vtable_offset);
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// Setup
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(*Item_setIcon)(item, texture_x, texture_y);
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(*Item_setDescriptionId)(item, name);
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*(int32_t *) (item + Item_is_stacked_by_data_property_offset) = 1;
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*(int32_t *) (item + Item_category_property_offset) = 2;
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*(int32_t *) (item + Item_max_damage_property_offset) = 0;
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*(int32_t *) (item + Item_max_stack_size_property_offset) = 1;
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// Return
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return item;
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}
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static void Item_initItems_injection(__attribute__((unused)) unsigned char *null) {
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bucket = create_bucket(69, 10, 4, "bucket");
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}
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// Change Max Stack Size Based On Auxiliary
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static int32_t ItemInstance_getMaxStackSize_injection(ItemInstance *item_instance) {
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if (item_instance->id == *(int32_t *) (bucket + Item_id_property_offset) && item_instance->auxiliary == 0) {
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// Custom Value
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return 16;
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} else {
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// Call Original Method
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return (*ItemInstance_getMaxStackSize)(item_instance);
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}
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}
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// Creative Inventory
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static void inventory_add_item(unsigned char *inventory, unsigned char *item, int32_t auxiliary) {
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ItemInstance *item_instance = new ItemInstance;
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ALLOC_CHECK(item_instance);
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item_instance = (*ItemInstance_constructor_item_extra)(item_instance, item, 1, auxiliary);
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(*FillingContainer_addItem)(inventory, item_instance);
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}
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static void Inventory_setupDefault_FillingContainer_addItem_call_injection(unsigned char *filling_container) {
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inventory_add_item(filling_container, bucket, 0);
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inventory_add_item(filling_container, bucket, *(int32_t *) (*Tile_water + Tile_id_property_offset));
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inventory_add_item(filling_container, bucket, *(int32_t *) (*Tile_lava + Tile_id_property_offset));
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}
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// Make Liquids Selectable
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static bool is_holding_bucket = false;
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static void Mob_pick_Level_clip_injection(unsigned char *level, unsigned char *param_1, unsigned char *param_2, bool param_3, __attribute__((unused)) bool clip_liquids) {
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// Call Original Method
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(*Level_clip)(level, param_1, param_2, param_3, is_holding_bucket);
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}
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static void handle_tick(unsigned char *minecraft) {
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unsigned char *player = *(unsigned char **) (minecraft + Minecraft_player_property_offset);
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if (player != NULL) {
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// Get Selected Slot
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int32_t selected_slot = misc_get_real_selected_slot(player);
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unsigned char *inventory = *(unsigned char **) (player + Player_inventory_property_offset);
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// Prepare
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unsigned char *inventory_vtable = *(unsigned char **) inventory;
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FillingContainer_getItem_t FillingContainer_getItem = *(FillingContainer_getItem_t *) (inventory_vtable + FillingContainer_getItem_vtable_offset);
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// Get Item
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ItemInstance *inventory_item = (*FillingContainer_getItem)(inventory, selected_slot);
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// Check
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is_holding_bucket = inventory_item != NULL && inventory_item->id == (*(int32_t *) (bucket + Item_id_property_offset)) && inventory_item->auxiliary == 0;
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}
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}
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// Prevent Breaking Liquid
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static bool is_calm_liquid(int32_t id) {
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if (id == *(int32_t *) (*Tile_calmWater + Tile_id_property_offset)) {
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return true;
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} else if (id == *(int32_t *) (*Tile_calmLava + Tile_id_property_offset)) {
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return true;
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} else {
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return false;
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}
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}
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static void Minecraft_handleMouseDown_injection(unsigned char *minecraft, int param_1, bool can_destroy) {
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// Check
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unsigned char *level = *(unsigned char **) (minecraft + Minecraft_level_property_offset);
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if (level != NULL) {
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int32_t x = *(int32_t *) (minecraft + Minecraft_targeted_x_property_offset);
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int32_t y = *(int32_t *) (minecraft + Minecraft_targeted_y_property_offset);
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int32_t z = *(int32_t *) (minecraft + Minecraft_targeted_z_property_offset);
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int32_t tile = (*Level_getTile)(level, x, y, z);
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if (is_calm_liquid(tile)) {
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can_destroy = false;
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}
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}
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// Call Original Method
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(*Minecraft_handleMouseDown)(minecraft, param_1, can_destroy);
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}
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// Custom Crafting Recipes
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static void Recipes_injection(unsigned char *recipes) {
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// Add
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Recipes_Type type1 = {
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.item = 0,
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.tile = 0,
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.instance = {
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.count = 3,
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.id = 265,
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.auxiliary = 0
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},
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.letter = '#'
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};
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ItemInstance result = {
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.count = 1,
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.id = (*(int32_t *) (bucket + Item_id_property_offset)),
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.auxiliary = 0
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};
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(*Recipes_addShapedRecipe_2)(recipes, result, "# #", " # ", {type1});
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}
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// Custom Furnace Fuel
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static int32_t FurnaceTileEntity_getBurnDuration_injection(ItemInstance const& item_instance) {
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if (item_instance.count > 0 && item_instance.id == (*(int32_t *) (bucket + Item_id_property_offset)) && item_instance.auxiliary == (*(int32_t *) (*Tile_lava + Tile_id_property_offset))) {
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return 20000;
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} else {
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// Call Original Method
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return (*FurnaceTileEntity_getBurnDuration)(item_instance);
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}
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}
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static void FurnaceTileEntity_tick_ItemInstance_setNull_injection(ItemInstance *item_instance) {
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// Replace Lava Bucket With Empty Bucket When It Burns Out
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if (item_instance->id == (*(int32_t *) (bucket + Item_id_property_offset))) {
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item_instance->auxiliary = 0;
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} else {
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// Original Behavior
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item_instance->count = 0;
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item_instance->id = 0;
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item_instance->auxiliary = 0;
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}
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}
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// Init
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void init_bucket() {
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// Add Buckets
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if (feature_has("Add Buckets", server_enabled)) {
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// Add Items
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misc_run_on_items_setup(Item_initItems_injection);
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// Change Max Stack Size Based On Auxiliary
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overwrite_calls((void *) ItemInstance_getMaxStackSize, (void *) ItemInstance_getMaxStackSize_injection);
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// Creative Inventory
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misc_run_on_creative_inventory_setup(Inventory_setupDefault_FillingContainer_addItem_call_injection);
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// Make Liquids Selectable
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overwrite_call((void *) 0x7f5b0, (void *) Mob_pick_Level_clip_injection);
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misc_run_on_tick(handle_tick);
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// Prevent Breaking Liquid
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overwrite_calls((void *) Minecraft_handleMouseDown, (void *) Minecraft_handleMouseDown_injection);
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// Custom Crafting Recipes
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misc_run_on_recipes_setup(Recipes_injection);
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// Custom Furnace Fuel
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overwrite_calls((void *) FurnaceTileEntity_getBurnDuration, (void *) FurnaceTileEntity_getBurnDuration_injection);
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overwrite_call((void *) 0xd351c, (void *) FurnaceTileEntity_tick_ItemInstance_setNull_injection);
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}
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}
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