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#include "RendererSectionData.hpp"
#include <array>
#include <glm/gtc/matrix_transform.hpp>
#include <glm/gtc/matrix_inverse.hpp>
#include <optick.h>
#include "World.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];
}
glm::vec2 TransformTextureCoord(glm::vec4 TextureAtlasCoords, glm::vec2 UvCoords, float frames) {
float x = TextureAtlasCoords.x;
float y = TextureAtlasCoords.y;
float w = TextureAtlasCoords.z;
float h = TextureAtlasCoords.w / frames;
glm::vec2 transformed = glm::vec2(x, 1 - y - h) + UvCoords * glm::vec2(w, h);
return transformed;
}
void AddFacesByBlockModel(RendererSectionData &data, const BlockFaces &model, const glm::mat4 &transform, bool visibility[FaceDirection::none], BlockLightness light, BlockLightness skyLight) {
for (const auto &face : model.faces) {
glm::vec2 lightness;
lightness.x = _max(light.face[0], light.face[1], light.face[2], light.face[3], light.face[4], light.face[5]);
lightness.y = _max(skyLight.face[0], skyLight.face[1], skyLight.face[2], skyLight.face[3], skyLight.face[4], skyLight.face[5]);
if (face.visibility != FaceDirection::none) {
FaceDirection direction = face.visibility;
Vector directionVec = model.faceDirectionVector[direction];
FaceDirection faceDirection = FaceDirection::none;
for (int i = 0; i < FaceDirection::none; i++) {
if (FaceDirectionVector[i] == directionVec) {
faceDirection = FaceDirection(i);
break;
}
}
if (faceDirection == FaceDirection::none)
continue;
if (visibility[faceDirection])
continue;
lightness = glm::vec2(light.face[faceDirection], skyLight.face[faceDirection]);
}
data.vertices.emplace_back();
VertexData& vertexData = data.vertices.back();
glm::mat4 transformed = transform * model.transform * face.transform;
vertexData.positions[0] = transformed * glm::vec4(0, 0, 0, 1);
vertexData.positions[1] = transformed * glm::vec4(0, 0, 1, 1);
vertexData.positions[2] = transformed * glm::vec4(1, 0, 1, 1);
vertexData.positions[3] = transformed * glm::vec4(1, 0, 0, 1);
glm::vec3 normal = glm::cross(vertexData.positions[1] - vertexData.positions[0], vertexData.positions[3] - vertexData.positions[0]);
vertexData.normal = glm::normalize(normal);
vertexData.uvs[0] = TransformTextureCoord(face.texture, glm::vec2(0, 0), face.frames);
vertexData.uvs[1] = TransformTextureCoord(face.texture, glm::vec2(1, 0), face.frames);
vertexData.uvs[2] = TransformTextureCoord(face.texture, glm::vec2(1, 1), face.frames);
vertexData.uvs[3] = TransformTextureCoord(face.texture, glm::vec2(0, 1), face.frames);
vertexData.uvLayers = face.layer;
vertexData.animations = face.frames;
vertexData.colors = face.color;
vertexData.lights = lightness;
}
}
BlockFaces *GetInternalBlockModel(const BlockId& id, std::vector<std::pair<BlockId, BlockFaces*>> &idModels) {
for (const auto& it : idModels) {
if (it.first == id)
return it.second;
}
idModels.push_back(std::make_pair(id, &AssetManager::GetBlockModelByBlockId(id)));
return idModels.back().second;
}
std::array<bool[FaceDirection::none], 4096> GetBlockVisibilityData(const SectionsData §ions, const std::array<BlockId, 4096> &blockIdData, std::vector<std::pair<BlockId, BlockFaces*>> &idModels) {
std::array<bool[FaceDirection::none], 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;
Vector vec(x, y, z);
BlockId blockIdDown = sections.GetBlockId(vec + FaceDirectionVector[FaceDirection::down]);
BlockId blockIdUp = sections.GetBlockId(vec + FaceDirectionVector[FaceDirection::up]);
BlockId blockIdNorth = sections.GetBlockId(vec + FaceDirectionVector[FaceDirection::north]);
BlockId blockIdSouth = sections.GetBlockId(vec + FaceDirectionVector[FaceDirection::south]);
BlockId blockIdWest = sections.GetBlockId(vec + FaceDirectionVector[FaceDirection::west]);
BlockId blockIdEast = sections.GetBlockId(vec + FaceDirectionVector[FaceDirection::east]);
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);
arr[y * 256 + z * 16 + x][FaceDirection::down] = blockIdDown.id != 0 && !blockModelDown->faces.empty() && blockModelDown->isBlock;
arr[y * 256 + z * 16 + x][FaceDirection::up] = blockIdUp.id != 0 && !blockModelUp->faces.empty() && blockModelUp->isBlock;
arr[y * 256 + z * 16 + x][FaceDirection::north] = blockIdNorth.id != 0 && !blockModelNorth->faces.empty() && blockModelNorth->isBlock;
arr[y * 256 + z * 16 + x][FaceDirection::south] = blockIdSouth.id != 0 && !blockModelSouth->faces.empty() && blockModelSouth->isBlock;
arr[y * 256 + z * 16 + x][FaceDirection::west] = blockIdWest.id != 0 && !blockModelWest->faces.empty() && blockModelWest->isBlock;
arr[y * 256 + z * 16 + x][FaceDirection::east] = blockIdEast.id != 0 && !blockModelEast->faces.empty() && blockModelEast->isBlock;
}
}
}
return arr;
}
std::array<BlockId, 4096> SetBlockIdData(const SectionsData §ions) {
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] = sections.section.GetBlockId(Vector(x, y, z));
}
}
}
return blockIdData;
}
RendererSectionData ParseSection(const SectionsData §ions) {
OPTICK_EVENT();
RendererSectionData data;
std::vector<std::pair<BlockId, BlockFaces*>> idModels;
std::array<BlockId, 4096> blockIdData = SetBlockIdData(sections);
std::array<bool[FaceDirection::none], 4096> blockVisibility = GetBlockVisibilityData(sections, blockIdData, idModels);
std::string textureName;
data.hash = sections.section.GetHash();
data.sectionPos = sections.section.GetPosition();
glm::mat4 baseOffset = glm::translate(glm::mat4(1.0), (sections.section.GetPosition() * 16).glm()), transform;
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;
Vector vec(x, y, z);
transform = glm::translate(baseOffset, vec.glm());
BlockLightness light = sections.GetLight(vec);
BlockLightness skyLight = sections.GetSkyLight(vec);
BlockFaces *model = GetInternalBlockModel(block, idModels);
AddFacesByBlockModel(data, *model, transform, blockVisibility[y * 256 + z * 16 + x], light, skyLight);
}
}
}
data.vertices.shrink_to_fit();
return data;
}
BlockId SectionsData::GetBlockId(const Vector &pos) const {
if (pos.x < 0)
return east.GetBlockId(Vector(15, pos.y, pos.z));
if (pos.x > 15)
return west.GetBlockId(Vector(0, pos.y, pos.z));
if (pos.y < 0)
return bottom.GetBlockId(Vector(pos.x, 15, pos.z));
if (pos.y > 15)
return top.GetBlockId(Vector(pos.x, 0, pos.z));
if (pos.z < 0)
return south.GetBlockId(Vector(pos.x, pos.y, 15));
if (pos.z > 15)
return north.GetBlockId(Vector(pos.x, pos.y, 0));
return section.GetBlockId(pos);
}
BlockLightness SectionsData::GetLight(const Vector &pos) const {
BlockLightness lightness;
static const Vector directions[] = {
Vector(1,0,0),
Vector(-1,0,0),
Vector(0,1,0),
Vector(0,-1,0),
Vector(0,0,1),
Vector(0,0,-1),
};
unsigned char self = section.GetBlockLight(pos);
for (const Vector &dir : directions) {
Vector vec = pos + dir;
unsigned char dirValue = 0;
if (vec.x < 0 || vec.x > 15 || vec.y < 0 || vec.y > 15 || vec.z < 0 || vec.z > 15) {
if (vec.x < 0)
dirValue = east.GetBlockLight(Vector(15, vec.y, vec.z));
if (vec.x > 15)
dirValue = west.GetBlockLight(Vector(0, vec.y, vec.z));
if (vec.y < 0)
dirValue = bottom.GetBlockLight(Vector(vec.x, 15, vec.z));
if (vec.y > 15)
dirValue = top.GetBlockLight(Vector(vec.x, 0, vec.z));
if (vec.z < 0)
dirValue = south.GetBlockLight(Vector(vec.x, vec.y, 15));
if (vec.z > 15)
dirValue = north.GetBlockLight(Vector(vec.x, vec.y, 0));
}
else
dirValue = section.GetBlockLight(vec);
dirValue = _max(self, dirValue);
if (dir == directions[0])
lightness.face[FaceDirection::east] = dirValue;
if (dir == directions[1])
lightness.face[FaceDirection::west] = dirValue;
if (dir == directions[2])
lightness.face[FaceDirection::up] = dirValue;
if (dir == directions[3])
lightness.face[FaceDirection::down] = dirValue;
if (dir == directions[4])
lightness.face[FaceDirection::south] = dirValue;
if (dir == directions[5])
lightness.face[FaceDirection::north] = dirValue;
}
return lightness;
}
BlockLightness SectionsData::GetSkyLight(const Vector &pos) const {
BlockLightness lightness;
static const Vector directions[] = {
Vector(1,0,0),
Vector(-1,0,0),
Vector(0,1,0),
Vector(0,-1,0),
Vector(0,0,1),
Vector(0,0,-1),
};
unsigned char self = section.GetBlockSkyLight(pos);
for (const Vector &dir : directions) {
Vector vec = pos + dir;
unsigned char dirValue = 0;
if (vec.x < 0 || vec.x > 15 || vec.y < 0 || vec.y > 15 || vec.z < 0 || vec.z > 15) {
if (vec.x < 0)
dirValue = east.GetBlockSkyLight(Vector(15, vec.y, vec.z));
if (vec.x > 15)
dirValue = west.GetBlockSkyLight(Vector(0, vec.y, vec.z));
if (vec.y < 0)
dirValue = bottom.GetBlockSkyLight(Vector(vec.x, 15, vec.z));
if (vec.y > 15)
dirValue = top.GetBlockSkyLight(Vector(vec.x, 0, vec.z));
if (vec.z < 0)
dirValue = south.GetBlockSkyLight(Vector(vec.x, vec.y, 15));
if (vec.z > 15)
dirValue = north.GetBlockSkyLight(Vector(vec.x, vec.y, 0));
}
else
dirValue = section.GetBlockSkyLight(vec);
dirValue = _max(self, dirValue);
if (dir == directions[0])
lightness.face[FaceDirection::east] = dirValue;
if (dir == directions[1])
lightness.face[FaceDirection::west] = dirValue;
if (dir == directions[2])
lightness.face[FaceDirection::up] = dirValue;
if (dir == directions[3])
lightness.face[FaceDirection::down] = dirValue;
if (dir == directions[4])
lightness.face[FaceDirection::south] = dirValue;
if (dir == directions[5])
lightness.face[FaceDirection::north] = dirValue;
}
return lightness;
}
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