1 files changed, 181 insertions, 0 deletions

diff --git a/old/core/AssetManager.cpp b/old/core/AssetManager.cpp
new file mode 100644
index 0000000..258f5d9
--- /dev/null
+++ b/old/core/AssetManager.cpp
@@ -0,0 +1,181 @@
+#include "AssetManager.hpp"
+
+namespace fs = std::experimental::filesystem;
+
+//const fs::path pathToAssets = "./assets/";
+//const fs::path pathToAssetsList = "./items.json";
+//const fs::path pathToTextureIndex = "./textures.json";
+const std::string pathToAssetsList = "./items.json";
+const std::string pathToTextureIndex = "./textures.json";
+
+AssetManager::AssetManager() {
+	LoadIds();
+	LoadTextureResources();
+}
+
+void AssetManager::LoadIds() {
+	std::ifstream in(pathToAssetsList);
+	nlohmann::json index;
+	in >> index;
+	for (auto &it:index) {
+		int id = it["type"].get<int>();
+		int state = it["meta"].get<int>();
+		std::string blockName = it["text_type"].get<std::string>();
+		assetIds[blockName] = Block(id, state);
+	}
+	LOG(INFO) << "Loaded " << assetIds.size() << " ids";
+}
+
+AssetManager::~AssetManager() {
+	delete textureAtlas;
+}
+
+//TODO: This function must be replaced with runtime texture atlas generating
+void AssetManager::LoadTextureResources() {
+	std::ifstream in(pathToTextureIndex);
+	nlohmann::json index;
+	in >> index;
+	std::string filename = index["meta"]["image"].get<std::string>();
+	float textureWidth = index["meta"]["size"]["w"].get<int>();
+	float textureHeight = index["meta"]["size"]["h"].get<int>();
+	for (auto &it:index["frames"]) {
+		auto frame = it["frame"];
+		TextureCoordinates coord;
+		coord.x = frame["x"].get<int>() / textureWidth;
+		coord.y = frame["y"].get<int>() / textureHeight;
+		coord.w = frame["w"].get<int>() / textureWidth;
+		coord.h = frame["h"].get<int>() / textureHeight;
+		std::string assetName = it["filename"].get<std::string>();
+		assetName.insert(0, "minecraft/textures/");
+		assetName.erase(assetName.length() - 4);
+		assetTextures[assetName] = coord;
+	}
+
+	textureAtlas = new Texture(filename);
+	LOG(INFO) << "Texture atlas id is " << textureAtlas->texture;
+}
+
+TextureCoordinates AssetManager::GetTextureByAssetName(std::string AssetName) {
+	if (assetTextures.find(AssetName) != assetTextures.end())
+		return assetTextures[AssetName];
+	else
+		return TextureCoordinates{-1, -1, -1, -1};
+}
+
+std::string AssetManager::GetTextureAssetNameByBlockId(BlockTextureId block) {
+	//Block sides: 0 - bottom, 1 - top, 2 - north, 3 - south, 4 - west, 5 - east 6 - every side
+	const std::map<BlockTextureId, std::string> lookupTable = {
+			{BlockTextureId(0, 0),     "minecraft/textures/blocks/air"},
+			{BlockTextureId(1, 0),     "minecraft/textures/blocks/stone"},
+			{BlockTextureId(1, 1),     "minecraft/textures/blocks/stone_granite"},
+
+			{BlockTextureId(2, 0, 0),  "minecraft/textures/blocks/dirt"},
+			{BlockTextureId(2, 0, 1),  "minecraft/textures/blocks/grass_top"},
+			{BlockTextureId(2, 0, 2),  "minecraft/textures/blocks/grass_side"},
+			{BlockTextureId(2, 0, 3),  "minecraft/textures/blocks/grass_side"},
+			{BlockTextureId(2, 0, 4),  "minecraft/textures/blocks/grass_side"},
+			{BlockTextureId(2, 0, 5),  "minecraft/textures/blocks/grass_side"},
+
+			{BlockTextureId(3, 0),     "minecraft/textures/blocks/dirt"},
+			{BlockTextureId(4, 0),     "minecraft/textures/blocks/cobblestone"},
+			{BlockTextureId(5, 0),     "minecraft/textures/blocks/planks"},
+
+			{BlockTextureId(7, 0),     "minecraft/textures/blocks/bedrock"},
+
+			{BlockTextureId(17, 0, 0), "minecraft/textures/blocks/log_oak_top"},
+			{BlockTextureId(17, 0, 1), "minecraft/textures/blocks/log_oak_top"},
+			{BlockTextureId(17, 0, 2), "minecraft/textures/blocks/log_oak"},
+			{BlockTextureId(17, 0, 3), "minecraft/textures/blocks/log_oak"},
+			{BlockTextureId(17, 0, 4), "minecraft/textures/blocks/log_oak"},
+			{BlockTextureId(17, 0, 5), "minecraft/textures/blocks/log_oak"},
+
+			{BlockTextureId(17, 1, 0), "minecraft/textures/blocks/log_spruce_top"},
+			{BlockTextureId(17, 1, 1), "minecraft/textures/blocks/log_spruce_top"},
+			{BlockTextureId(17, 1, 2), "minecraft/textures/blocks/log_spruce"},
+			{BlockTextureId(17, 1, 3), "minecraft/textures/blocks/log_spruce"},
+			{BlockTextureId(17, 1, 4), "minecraft/textures/blocks/log_spruce"},
+			{BlockTextureId(17, 1, 5), "minecraft/textures/blocks/log_spruce"},
+
+			{BlockTextureId(17, 2, 0), "minecraft/textures/blocks/log_birch_top"},
+			{BlockTextureId(17, 2, 1), "minecraft/textures/blocks/log_birch_top"},
+			{BlockTextureId(17, 2, 2), "minecraft/textures/blocks/log_birch"},
+			{BlockTextureId(17, 2, 3), "minecraft/textures/blocks/log_birch"},
+			{BlockTextureId(17, 2, 4), "minecraft/textures/blocks/log_birch"},
+			{BlockTextureId(17, 2, 5), "minecraft/textures/blocks/log_birch"},
+
+			{BlockTextureId(17, 3, 0), "minecraft/textures/blocks/log_jungle_top"},
+			{BlockTextureId(17, 3, 1), "minecraft/textures/blocks/log_jungle_top"},
+			{BlockTextureId(17, 3, 2), "minecraft/textures/blocks/log_jungle"},
+			{BlockTextureId(17, 3, 3), "minecraft/textures/blocks/log_jungle"},
+			{BlockTextureId(17, 3, 4), "minecraft/textures/blocks/log_jungle"},
+			{BlockTextureId(17, 3, 5), "minecraft/textures/blocks/log_jungle"},
+
+			{BlockTextureId(18, 0),    "minecraft/textures/blocks/leaves_oak"},
+			{BlockTextureId(18, 1),    "minecraft/textures/blocks/leaves_spruce"},
+			{BlockTextureId(18, 2),    "minecraft/textures/blocks/leaves_birch"},
+			{BlockTextureId(18, 3),    "minecraft/textures/blocks/leaves_jungle"},
+
+			{BlockTextureId(61, 0, 0), "minecraft/textures/blocks/furnace_side"},
+			{BlockTextureId(61, 0, 1), "minecraft/textures/blocks/furnace_top"},
+			{BlockTextureId(61, 0, 2), "minecraft/textures/blocks/furnace_front_off"},
+			{BlockTextureId(61, 0, 3), "minecraft/textures/blocks/furnace_side"},
+			{BlockTextureId(61, 0, 4), "minecraft/textures/blocks/furnace_side"},
+			{BlockTextureId(61, 0, 5), "minecraft/textures/blocks/furnace_side"},
+
+			{BlockTextureId(62, 0, 0), "minecraft/textures/blocks/furnace_side"},
+			{BlockTextureId(62, 0, 1), "minecraft/textures/blocks/furnace_top"},
+			{BlockTextureId(62, 0, 2), "minecraft/textures/blocks/furnace_front_on"},
+			{BlockTextureId(62, 0, 3), "minecraft/textures/blocks/furnace_side"},
+			{BlockTextureId(62, 0, 4), "minecraft/textures/blocks/furnace_side"},
+			{BlockTextureId(62, 0, 5), "minecraft/textures/blocks/furnace_side"},
+
+
+			{BlockTextureId(31, 0),    "minecraft/textures/blocks/deadbush"},
+			{BlockTextureId(31, 1),    "minecraft/textures/blocks/tallgrass"},
+			{BlockTextureId(31, 2),    "minecraft/textures/blocks/fern"},
+	};
+	auto ret = lookupTable.find(block);
+	if (ret == lookupTable.end())
+		return "";
+	else
+		return ret->second;
+}
+
+GLuint AssetManager::GetTextureAtlas() {
+	return textureAtlas->texture;
+}
+
+TextureCoordinates AssetManager::GetTextureByBlock(BlockTextureId block) {
+	std::string assetName = this->GetTextureAssetNameByBlockId(block);
+	return this->GetTextureByAssetName(assetName);
+}
+
+const std::map<BlockTextureId, glm::vec4> &AssetManager::GetTextureAtlasIndexes() {
+	if (!textureAtlasIndexes.empty())
+		return textureAtlasIndexes;
+
+	LOG(INFO) << "Initializing texture atlas...";
+	for (int id = 1; id < 128; id++) {
+		for (int state = 0; state < 16; state++) {
+			BlockTextureId blockTextureId(id, state, 6);
+			if (!this->GetTextureByBlock(blockTextureId) &&
+			    !this->GetTextureByBlock(BlockTextureId(id, state, 0))) {
+				continue;
+			}
+			if (this->GetTextureByBlock(blockTextureId)) {
+				for (int i = 0; i < 6; i++) {
+					TextureCoordinates tc = this->GetTextureByBlock(BlockTextureId(id, state, 6));
+					textureAtlasIndexes[BlockTextureId(id, state, i)] = glm::vec4(tc.x, tc.y, tc.w, tc.h);
+				}
+			} else {
+				for (int i = 0; i < 6; i++) {
+					TextureCoordinates tc = this->GetTextureByBlock(BlockTextureId(id, state, i));
+					textureAtlasIndexes[BlockTextureId(id, state, i)] = glm::vec4(tc.x, tc.y, tc.w, tc.h);
+				}
+			}
+		}
+	}
+	LOG(INFO) << "Created " << textureAtlasIndexes.size() << " texture indexes";
+
+	return textureAtlasIndexes;
+}