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#include "RendererSectionData.hpp"
#include <array>
#include <glm/gtc/matrix_transform.hpp>
#include "World.hpp"
#include "AssetManager.hpp"
#include "Section.hpp"
inline const BlockId& GetBlockId(const Vector& pos, const std::array<BlockId, 4096> &blockIdData) {
return blockIdData[pos.y * 256 + pos.z * 16 + pos.x];
}
inline const BlockId& GetBlockId(int x, int y, int z, const std::array<BlockId, 4096> &blockIdData) {
return blockIdData[y * 256 + z * 16 + x];
}
void AddFacesByBlockModel(const std::vector<Vector> §ionsList, World *world, Vector blockPos, const BlockModel &model, glm::mat4 transform, unsigned char light, unsigned char skyLight, const std::array<unsigned char, 16 * 16 * 16>& visibility, RendererSectionData &data) {
glm::mat4 elementTransform, faceTransform;
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);
elementTransform = transform;
/*if (element.rotationAngle != 0) {
const glm::vec3 xAxis(1.0f, 0.0f, 0.0f);
const glm::vec3 yAxis(0.0f, 1.0f, 0.0f);
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);
elementTransform = glm::translate(elementTransform, -rotateOrigin.glm());
elementTransform = glm::rotate(elementTransform, glm::radians(float(45)), yAxis);
elementTransform = glm::translate(elementTransform, rotateOrigin.glm());
}*/
elementTransform = glm::translate(elementTransform, elementOrigin.glm());
elementTransform = glm::scale(elementTransform, elementSize.glm());
for (const auto& face : element.faces) {
if (face.second.cullface != BlockModel::ElementData::FaceDirection::none) {
unsigned char visible = visibility[blockPos.y * 256 + blockPos.z * 16 + blockPos.x];
switch (face.second.cullface) {
case BlockModel::ElementData::FaceDirection::down:
if (visible >> 0 & 0x1)
continue;
break;
case BlockModel::ElementData::FaceDirection::up:
if (visible >> 1 & 0x1)
continue;
break;
case BlockModel::ElementData::FaceDirection::north:
if (visible >> 2 & 0x1)
continue;
break;
case BlockModel::ElementData::FaceDirection::south:
if (visible >> 3 & 0x1)
continue;
break;
case BlockModel::ElementData::FaceDirection::west:
if (visible >> 4 & 0x1)
continue;
break;
case BlockModel::ElementData::FaceDirection::east:
if (visible >> 5 & 0x1)
continue;
break;
}
}
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;
}
data.models.push_back(faceTransform);
std::string textureName = face.second.texture;
while (textureName[0] == '#') {
textureName = model.Textures.find(std::string(textureName.begin() + 1, textureName.end()))->second;
}
glm::vec4 texture = AssetManager::Instance().GetTextureByAssetName("minecraft/textures/" + 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 };
}
data.textures.push_back(texture);
if (face.second.tintIndex)
data.colors.push_back(glm::vec3(0.275, 0.63, 0.1));
else
data.colors.push_back(glm::vec3(0, 0, 0));
data.lights.push_back(glm::vec2(light, skyLight));
}
}
}
const BlockModel* GetInternalBlockModel(const BlockId& id, std::vector<std::pair<BlockId, const BlockModel *>> &idModels) {
for (const auto& it : idModels) {
if (it.first == id)
return it.second;
}
idModels.push_back(std::make_pair(id, AssetManager::Instance().GetBlockModelByBlockId(id)));
return idModels.back().second;
}
std::array<unsigned char, 4096> GetBlockVisibilityData(World *world, const Vector §ionPos, const std::array<BlockId, 4096> &blockIdData, std::vector<std::pair<BlockId, const BlockModel *>> &idModels) {
const auto& sectionDown = world->GetSection(sectionPos + Vector(0, -1, 0));
const auto& sectionUp = world->GetSection(sectionPos + Vector(0, +1, 0));
const auto& sectionNorth = world->GetSection(sectionPos + Vector(0, 0, +1));
const auto& sectionSouth = world->GetSection(sectionPos + Vector(0, 0, -1));
const auto& sectionWest = world->GetSection(sectionPos + Vector(+1, 0, 0));
const auto& sectionEast = world->GetSection(sectionPos + Vector(-1, 0, 0));
std::array<unsigned char, 4096> arr;
for (int y = 0; y < 16; y++) {
for (int z = 0; z < 16; z++) {
for (int x = 0; x < 16; x++) {
unsigned char value = 0;
BlockId blockIdDown;
BlockId blockIdUp;
BlockId blockIdNorth;
BlockId blockIdSouth;
BlockId blockIdWest;
BlockId blockIdEast;
switch (y) {
case 0:
blockIdDown = sectionDown.GetBlockId(Vector(x, 15, z));
blockIdUp = GetBlockId(x, 1, z, blockIdData);
break;
case 15:
blockIdDown = GetBlockId(x, 14, z, blockIdData);
blockIdUp = sectionUp.GetBlockId(Vector(x, 0, z));
break;
default:
blockIdDown = GetBlockId(x, y - 1, z, blockIdData);
blockIdUp = GetBlockId(x, y + 1, z, blockIdData);
break;
}
switch (z) {
case 0:
blockIdNorth = GetBlockId(x, y, 1, blockIdData);
blockIdSouth = sectionSouth.GetBlockId(Vector(x, y, 15));
break;
case 15:
blockIdNorth = sectionNorth.GetBlockId(Vector(x, y, 0));
blockIdSouth = GetBlockId(x, y, 14, blockIdData);
break;
default:
blockIdNorth = GetBlockId(x, y, z + 1, blockIdData);
blockIdSouth = GetBlockId(x, y, z - 1, blockIdData);
break;
}
switch (x) {
case 0:
blockIdWest = GetBlockId(1, y, z, blockIdData);
blockIdEast = sectionEast.GetBlockId(Vector(15, y, z));
break;
case 15:
blockIdWest = sectionWest.GetBlockId(Vector(0, y, z));
blockIdEast = GetBlockId(14, y, z, blockIdData);
break;
default:
blockIdWest = GetBlockId(x + 1, y, z, blockIdData);
blockIdEast = GetBlockId(x - 1, y, z, blockIdData);
break;
}
auto blockModelDown = GetInternalBlockModel(blockIdDown, idModels);
auto blockModelUp = GetInternalBlockModel(blockIdUp, idModels);
auto blockModelNorth = GetInternalBlockModel(blockIdNorth, idModels);
auto blockModelSouth = GetInternalBlockModel(blockIdSouth, idModels);
auto blockModelWest = GetInternalBlockModel(blockIdWest, idModels);
auto blockModelEast = GetInternalBlockModel(blockIdEast, idModels);
value |= (blockIdDown.id != 0 && blockModelDown && blockModelDown->IsBlock) << 0;
value |= (blockIdUp.id != 0 && blockModelUp && blockModelUp->IsBlock) << 1;
value |= (blockIdNorth.id != 0 && blockModelNorth && blockModelNorth->IsBlock) << 2;
value |= (blockIdSouth.id != 0 && blockModelSouth && blockModelSouth->IsBlock) << 3;
value |= (blockIdWest.id != 0 && blockModelWest && blockModelWest->IsBlock) << 4;
value |= (blockIdEast.id != 0 && blockModelEast && blockModelEast->IsBlock) << 5;
arr[y * 256 + z * 16 + x] = value;
}
}
}
return arr;
}
std::array<BlockId, 4096> SetBlockIdData(World* world, const Vector §ionPos) {
const Section& section = world->GetSection(sectionPos);
std::array<BlockId, 4096> blockIdData;
for (int y = 0; y < 16; y++) {
for (int z = 0; z < 16; z++) {
for (int x = 0; x < 16; x++) {
blockIdData[y * 256 + z * 16 + x] = section.GetBlockId(Vector(x, y, z));
}
}
}
return blockIdData;
}
RendererSectionData ParseSection(World * world, Vector sectionPosition)
{
RendererSectionData data;
std::vector<std::pair<BlockId, const BlockModel *>> idModels;
std::array<BlockId, 4096> blockIdData = SetBlockIdData(world, sectionPosition);
std::array<unsigned char, 4096> blockVisibility = GetBlockVisibilityData(world, sectionPosition, blockIdData, idModels);
const std::map<BlockTextureId, glm::vec4> &textureAtlas = AssetManager::Instance().GetTextureAtlasIndexes();
const Section §ion = world->GetSection(sectionPosition);
data.hash = section.GetHash();
data.sectionPos = sectionPosition;
glm::mat4 baseOffset = glm::translate(glm::mat4(), (section.GetPosition() * 16).glm()), transform;
auto sectionsList = world->GetSectionsList();
for (int y = 0; y < 16; y++) {
for (int z = 0; z < 16; z++) {
for (int x = 0; x < 16; x++) {
BlockId block = GetBlockId(x, y, z, blockIdData);
if (block.id == 0)
continue;
const bool useNewMethod = true;
transform = glm::translate(baseOffset, Vector(x, y, z).glm());
const BlockModel* model = GetInternalBlockModel(block, idModels);
if (model) {
AddFacesByBlockModel(sectionsList, world, Vector(x, y, z), *model, transform, section.GetBlockLight(Vector(x, y, z)), section.GetBlockSkyLight(Vector(x, y, z)), blockVisibility, data);
}
else {
transform = glm::translate(transform, glm::vec3(0, 1, 0));
if (block.id == 8 || block.id == 9) {
data.textures.push_back(AssetManager::Instance().GetTextureByAssetName("minecraft/textures/blocks/water_still"));
data.textures.back().w /= 32.0f;
transform = glm::translate(transform, glm::vec3(0, -0.2, 0));
}
else
data.textures.push_back(AssetManager::Instance().GetTextureByAssetName("minecraft/textures/blocks/tnt_side"));
data.models.push_back(transform);
data.colors.push_back(glm::vec3(0, 0, 0));
data.lights.push_back(glm::vec2(16, 16));
}
}
}
}
data.textures.shrink_to_fit();
data.models.shrink_to_fit();
data.colors.shrink_to_fit();
return data;
}
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