#include "AssetManager.hpp"
#include <fstream>
#include <experimental/filesystem>
#include <nlohmann/json.hpp>
#include <easylogging++.h>
#include <glm/gtc/matrix_transform.hpp>
#include "Texture.hpp"
namespace fs = std::experimental::filesystem::v1;
//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";
const fs::path pathToModels = "./assets/minecraft/models/";
AssetManager::AssetManager() {
LoadIds();
LoadTextureResources();
LoadBlockModels();
ParseBlockModels();
}
void AssetManager::LoadIds() {
std::ifstream in(pathToAssetsList);
nlohmann::json index;
in >> index;
for (auto &it:index) {
unsigned short id = it["type"].get<int>();
unsigned char state = it["meta"].get<int>();
std::string blockName = it["text_type"].get<std::string>();
assetIds[blockName] = BlockId{ 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>();
size_t sizeName = 0,sizeTexture = 0;
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);
assetName.shrink_to_fit();
sizeName += sizeof(assetName) + assetName.capacity();
sizeTexture += sizeof(coord);
assetTextures[assetName] = coord;
}
textureAtlas = new Texture(filename);
LOG(INFO) << "Texture atlas id is " << textureAtlas->texture;
}
TextureCoordinates AssetManager::GetTextureByAssetName(const std::string &AssetName) {
auto it = assetTextures.find(AssetName);
if (it != assetTextures.end())
return it->second;
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);
return (ret == lookupTable.end()) ? "" : 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;
}
AssetManager &AssetManager::Instance() {
static AssetManager assetManager;
return assetManager;
}
const BlockModel *AssetManager::GetBlockModelByBlockId(BlockId block) {
block.state = 0;
if (blockIdToBlockName.find(block) == blockIdToBlockName.end()) {
std::string blockName = "";
for (const auto& it : assetIds) {
if (BlockId{ it.second.id,0 } == block) {
blockName = it.first;
break;
}
}
if (blockName == "grass")
blockName = "grass_normal";
if (blockName == "torch")
blockName = "normal_torch";
if (blockName == "leaves")
blockName = "oak_leaves";
if (blockName == "tallgrass")
blockName = "tall_grass";
if (blockName == "log")
blockName = "oak_bark";
if (blockName == "snow_layer")
blockName = "snow_height2";
blockName = "block/" + blockName;
if (blockName == "")
return nullptr;
blockIdToBlockName[block] = blockName;
}
std::string blockName = blockIdToBlockName[block];
auto modelIt = models.find(blockName);
return (modelIt == models.end()) ? nullptr : &modelIt->second;
}
void AssetManager::LoadBlockModels() {
std::function<void(std::string)> parseModel = [&](std::string ModelName) {
if (models.find(ModelName) != models.end())
return;
fs::path ModelPath = pathToModels / fs::path(ModelName + ".json");
std::ifstream in(ModelPath);
if (!in.is_open())
throw std::runtime_error("Trying to load unknown model \"" + ModelName + "\" at " + ModelPath.generic_string());
nlohmann::json modelData;
in >> modelData;
BlockModel model;
if (modelData.find("parent") != modelData.end()) {
if (models.find(modelData["parent"]) == models.end())
parseModel(modelData["parent"].get<std::string>());
model = models.find(modelData["parent"])->second;
}
model.BlockName = ModelName;
if (model.BlockName == "block/block")
model.IsBlock = true;
if (model.BlockName == "block/thin_block" || model.BlockName=="block/leaves")
model.IsBlock = false;
if (modelData.find("ambientocclusion") != modelData.end())
model.AmbientOcclusion = modelData["ambientocclusion"].get<bool>();
//models.Display
if (modelData.find("textures") != modelData.end()) {
for (nlohmann::json::iterator texture = modelData["textures"].begin(); texture != modelData["textures"].end(); ++texture) {
model.Textures[texture.key()] = texture.value().get<std::string>();
}
}
if (modelData.find("elements") != modelData.end()) {
model.Elements.clear();
for (auto& it : modelData["elements"]) {
BlockModel::ElementData element;
auto vec = it["from"];
Vector from (vec[0].get<int>(), vec[1].get<int>(), vec[2].get<int>());
vec = it["to"];
Vector to(vec[0].get<int>(), vec[1].get<int>(), vec[2].get<int>());
element.from = from;
element.to = to;
if (it.find("rotation") != it.end()) {
vec = it["rotation"]["origin"];
Vector rotOrig(vec[0].get<int>(), vec[1].get<int>(), vec[2].get<int>());
element.rotationOrigin = rotOrig;
element.rotationAxis = (it["rotation"]["axis"].get<std::string>() == "x") ? BlockModel::ElementData::Axis::x : ((it["rotation"]["axis"].get<std::string>() == "y") ? BlockModel::ElementData::Axis::y : BlockModel::ElementData::Axis::z);
if (it["rotation"].find("angle") != it["rotation"].end())
element.rotationAngle = it["rotation"]["angle"].get<int>();
if (it["rotation"].find("rescale") != it["rotation"].end())
element.rotationRescale = it["rotation"]["rescale"].get<bool>();
}
if (it.find("shade") != it.end())
element.shade = it["shade"].get<bool>();
for (nlohmann::json::iterator faceIt = it["faces"].begin(); faceIt != it["faces"].end(); ++faceIt) {
auto face = faceIt.value();
BlockModel::ElementData::FaceData faceData;
BlockModel::ElementData::FaceDirection faceDir;
if (faceIt.key() == "down")
faceDir = BlockModel::ElementData::FaceDirection::down;
else if (faceIt.key() == "up")
faceDir = BlockModel::ElementData::FaceDirection::up;
else if (faceIt.key() == "north")
faceDir = BlockModel::ElementData::FaceDirection::north;
else if (faceIt.key() == "south")
faceDir = BlockModel::ElementData::FaceDirection::south;
else if (faceIt.key() == "west")
faceDir = BlockModel::ElementData::FaceDirection::west;
else if (faceIt.key() == "east")
faceDir = BlockModel::ElementData::FaceDirection::east;
if (face.find("uv") != face.end()) {
BlockModel::ElementData::FaceData::Uv uv;
uv.x1 = face["uv"][0];
uv.y1 = face["uv"][1];
uv.x2 = face["uv"][2];
uv.y2 = face["uv"][3];
faceData.uv = uv;
}
BlockModel::ElementData::FaceDirection cullface = BlockModel::ElementData::FaceDirection::none;
if (face.find("cullface") != face.end()) {
if (face["cullface"] == "down")
cullface = BlockModel::ElementData::FaceDirection::down;
else if (face["cullface"] == "up")
cullface = BlockModel::ElementData::FaceDirection::up;
else if (face["cullface"] == "north")
cullface = BlockModel::ElementData::FaceDirection::north;
else if (face["cullface"] == "south")
cullface = BlockModel::ElementData::FaceDirection::south;
else if (face["cullface"] == "west")
cullface = BlockModel::ElementData::FaceDirection::west;
else if (face["cullface"] == "east")
cullface = BlockModel::ElementData::FaceDirection::east;
}
faceData.cullface = cullface;
faceData.texture = face["texture"].get<std::string>();
if (face.find("rotation") != face.end())
faceData.rotation = face["rotation"].get<int>();
if (face.find("tintindex") != face.end())
faceData.tintIndex = true;
element.faces[faceDir] = faceData;
}
model.Elements.push_back(element);
}
}
models.insert(std::make_pair(ModelName, model));
};
fs::path pathToBlockModels = pathToModels.generic_string() + "/block/";
for (auto& dirEntry : fs::recursive_directory_iterator(pathToBlockModels)) {
if (dirEntry.path().extension() != ".json")
continue;
std::string modelName = dirEntry.path().stem().generic_string();
parseModel("block/" + modelName);
}
}
std::string AssetManager::GetAssetNameByBlockId(BlockId block) {
for (auto& it : assetIds) {
BlockId value = it.second;
value.state = 0;
if (value == block)
return it.first;
}
return "#NF";
}
void AssetManager::ParseBlockModels() {
std::string textureName;
for (auto &modelIt : models) {
const auto &modelName = modelIt.first;
auto &model = modelIt.second;
for (const auto& element : model.Elements) {
Vector t = element.to - element.from;
VectorF elementSize(VectorF(t.x, t.y, t.z) / 16.0f);
VectorF elementOrigin(VectorF(element.from.x, element.from.y, element.from.z) / 16.0f);
glm::mat4 elementTransform;
if (element.rotationAngle != 0) {
static const glm::vec3 xAxis(1.0f, 0.0f, 0.0f);
static const glm::vec3 yAxis(0.0f, 1.0f, 0.0f);
static const glm::vec3 zAxis(0.0f, 0.0f, 1.0f);
const glm::vec3 *targetAxis = nullptr;
switch (element.rotationAxis) {
case BlockModel::ElementData::Axis::x:
targetAxis = &xAxis;
break;
case BlockModel::ElementData::Axis::y:
targetAxis = &yAxis;
break;
case BlockModel::ElementData::Axis::z:
targetAxis = &zAxis;
break;
}
VectorF rotateOrigin(VectorF(element.rotationOrigin.x, element.rotationOrigin.y, element.rotationOrigin.z) / 16.0f);
glm::mat4 rotationMat;
rotationMat = glm::translate(rotationMat, rotateOrigin.glm());
rotationMat = glm::rotate(rotationMat, glm::radians((float)element.rotationAngle), *targetAxis);
if (element.rotationRescale) {
glm::vec3 scaleFactor{ 1.0f,1.0f,1.0f };
double coef = 1.0f / cos(glm::radians((double)element.rotationAngle));
switch (element.rotationAxis) {
case BlockModel::ElementData::Axis::x:
scaleFactor.y *= coef;
scaleFactor.z *= coef;
break;
case BlockModel::ElementData::Axis::y:
scaleFactor.x *= coef;
scaleFactor.z *= coef;
break;
case BlockModel::ElementData::Axis::z:
scaleFactor.x *= coef;
scaleFactor.y *= coef;
break;
}
rotationMat = glm::scale(rotationMat, scaleFactor);
}
rotationMat = glm::translate(rotationMat, -rotateOrigin.glm());
elementTransform = rotationMat * elementTransform;
}
elementTransform = glm::translate(elementTransform, elementOrigin.glm());
elementTransform = glm::scale(elementTransform, elementSize.glm());
for (const auto& face : element.faces) {
BlockModel::ParsedFace parsedFace;
parsedFace.visibility = face.second.cullface;
glm::mat4 faceTransform;
switch (face.first) {
case BlockModel::ElementData::FaceDirection::down:
faceTransform = glm::translate(elementTransform, glm::vec3(0, 0, 0));
faceTransform = glm::rotate(faceTransform, glm::radians(180.0f), glm::vec3(1.0f, 0, 0));
faceTransform = glm::translate(faceTransform, glm::vec3(0, 0, -1));
break;
case BlockModel::ElementData::FaceDirection::up:
faceTransform = glm::translate(elementTransform, glm::vec3(0.0f, 1.0f, 0.0f));
break;
case BlockModel::ElementData::FaceDirection::north:
faceTransform = glm::translate(elementTransform, glm::vec3(0, 0, 1));
faceTransform = glm::rotate(faceTransform, glm::radians(90.0f), glm::vec3(-1.0f, 0.0f, 0.0f));
faceTransform = glm::rotate(faceTransform, glm::radians(90.0f), glm::vec3(0.0f, -1.0f, 0.0f));
faceTransform = glm::translate(faceTransform, glm::vec3(0, 0, -1));
faceTransform = glm::rotate(faceTransform, glm::radians(180.0f), glm::vec3(1, 0, 0.0f));
faceTransform = glm::translate(faceTransform, glm::vec3(0, 0, -1.0f));
break;
case BlockModel::ElementData::FaceDirection::south:
faceTransform = glm::translate(elementTransform, glm::vec3(1, 0, 0));
faceTransform = glm::rotate(faceTransform, glm::radians(90.0f), glm::vec3(-1.0f, 0.0f, 0.0f));
faceTransform = glm::rotate(faceTransform, glm::radians(90.0f), glm::vec3(0.0f, -1.0f, 0.0f));
break;
case BlockModel::ElementData::FaceDirection::west:
faceTransform = glm::translate(elementTransform, glm::vec3(1, 0, 0));
faceTransform = glm::rotate(faceTransform, glm::radians(90.0f), glm::vec3(0, 0.0f, 1.0f));
faceTransform = glm::rotate(faceTransform, glm::radians(180.0f), glm::vec3(1.0f, 0.0f, 0.0f));
faceTransform = glm::translate(faceTransform, glm::vec3(0, 0, -1));
break;
case BlockModel::ElementData::FaceDirection::east:
faceTransform = glm::translate(elementTransform, glm::vec3(0, 0, 0));
faceTransform = glm::rotate(faceTransform, glm::radians(90.0f), glm::vec3(0, 0.0f, 1.0f));
break;
}
parsedFace.transform = faceTransform;
glm::vec4 texture;
textureName = face.second.texture;
if (model.Textures.empty()) {
texture = GetTextureByAssetName("minecraft/texture/blocks/tnt_side");
}
else {
while (textureName[0] == '#') {
textureName.erase(0, 1);
auto textureIt = model.Textures.find(textureName);
textureName = textureIt != model.Textures.end() ? textureIt->second : "minecraft/texture/blocks/tnt_side";
}
textureName.insert(0, "minecraft/textures/");
texture = GetTextureByAssetName(textureName);
if (!(face.second.uv == BlockModel::ElementData::FaceData::Uv{ 0,16,0,16 }) && !(face.second.uv == BlockModel::ElementData::FaceData::Uv{ 0,0,0,0 })
&& !(face.second.uv == BlockModel::ElementData::FaceData::Uv{ 0,0,16,16 })) {
double x = face.second.uv.x1;
double y = face.second.uv.x1;
double w = face.second.uv.x2 - face.second.uv.x1;
double h = face.second.uv.y2 - face.second.uv.y1;
x /= 16.0;
y /= 16.0;
w /= 16.0;
h /= 16.0;
double X = texture.x;
double Y = texture.y;
double W = texture.z;
double H = texture.w;
texture = glm::vec4{ X + x * W, Y + y * H, w * W , h * H };
}
}
parsedFace.texture = texture;
if (face.second.tintIndex)
parsedFace.color = glm::vec3(0.275, 0.63, 0.1);
else
parsedFace.color = glm::vec3(0, 0, 0);
model.parsedFaces.push_back(parsedFace);
}
}
}
}
