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Handle lighting and depth

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This commit is contained in:
Matthias Schiffer 2015-02-01 14:02:04 +01:00
parent d26fe3d9f8
commit 8b09f6f4ec
7 changed files with 220 additions and 72 deletions
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1
src/CMakeLists.txt
View file

@ -4,6 +4,7 @@ link_directories(${ZLIB_LIBRARY_DIRS} ${LIBPNG_LIBRARY_DIRS})
add_executable(MinedMap
MinedMap.cpp
NBT/Tag.cpp
World/Block.cpp
World/BlockType.cpp
World/Chunk.cpp
World/Region.cpp

8
src/MinedMap.cpp
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@ -96,12 +96,8 @@ int main(int argc, char *argv[]) {
World::Chunk::Blocks layer = chunk->getTopLayer();
for (size_t x = 0; x < World::Chunk::SIZE; x++) {
for (size_t z = 0; z < World::Chunk::SIZE; z++) {
const World::BlockType &t = World::BLOCK_TYPES[layer.blocks[x][z].id];
if (t.opaque)
image[Z*World::Chunk::SIZE+z][X*World::Chunk::SIZE+x] = htonl((t.color << 8) | 0xff);
}
for (size_t z = 0; z < World::Chunk::SIZE; z++)
image[Z*World::Chunk::SIZE+z][X*World::Chunk::SIZE+x] = htonl(layer.blocks[x][z].getColor());
}
}
}

9
src/NBT/ByteArrayTag.hpp
View file

@ -55,9 +55,16 @@ public:
return len;
}
const uint8_t & operator[](size_t i) const {
const uint8_t & get(size_t i) const {
return value[i];
}
uint8_t getHalf(size_t i) const {
if (i % 2)
return (value[i/2] >> 4);
else
return (value[i/2] & 0xf);
}
};
}

57
src/World/Block.cpp Normal file
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@ -0,0 +1,57 @@
/*
Copyright (c) 2015, Matthias Schiffer <mschiffer@universe-factory.net>
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "Block.hpp"
#include "BlockType.hpp"
namespace MinedMap {
namespace World {
uint32_t Block::getColor() const {
const World::BlockType &t = World::BLOCK_TYPES[id];
if (!t.opaque)
return 0;
uint8_t r = t.color >> 16;
uint8_t g = t.color >> 8;
uint8_t b = t.color;
uint8_t light = (blockLight > skyLight) ? blockLight : skyLight;
float lightCoef = light/30.0f + 0.5f;
float heightCoef = height/255.0f + 0.5f;
r *= lightCoef * heightCoef;
g *= lightCoef * heightCoef;
b *= lightCoef * heightCoef;
return (r << 24) | (g << 16) | (b << 8) | 0xff;
}
}
}

9
src/World/Block.hpp
View file

@ -35,6 +35,15 @@ namespace World {
struct Block {
uint8_t id;
uint8_t data;
unsigned height;
uint8_t blockLight;
uint8_t skyLight;
Block() : id(0), data(0), height(0), blockLight(0), skyLight(0) {}
uint32_t getColor() const;
};
}

99
src/World/Chunk.cpp
View file

@ -26,9 +26,6 @@
#include "Chunk.hpp"
#include "BlockType.hpp"
#include "../Util.hpp"
#include "../NBT/ByteTag.hpp"
#include "../NBT/ByteArrayTag.hpp"
#include <iostream>
#include <stdexcept>
@ -92,69 +89,89 @@ void Chunk::inflateChunk(Buffer buffer) {
void Chunk::parseChunk() {
Buffer nbt(data.get(), len);
std::pair<std::string, std::shared_ptr<const NBT::Tag>> tag = NBT::Tag::readNamedTag(&nbt);
std::shared_ptr<const NBT::CompoundTag>::operator=(std::dynamic_pointer_cast<const NBT::CompoundTag>(tag.second));
if (!(*this) || tag.first != "")
if (tag.first != "")
throw std::invalid_argument("invalid root tag");
level = assertValue((*this)->get<NBT::CompoundTag>("Level"));
sections = assertValue(level->get<NBT::ListTag<NBT::CompoundTag>>("Sections"));
root = assertValue(std::dynamic_pointer_cast<const NBT::CompoundTag>(tag.second));
level = assertValue(root->get<NBT::CompoundTag>("Level"));
}
void Chunk::analyzeChunk() {
maxY = (assertValue(sections->back()->get<NBT::ByteTag>("Y"))->getValue() + 1) * SIZE;
std::shared_ptr<const NBT::ByteTag> lightPopulatedTag = level->get<NBT::ByteTag>("LightPopulated");
if (!lightPopulatedTag && lightPopulatedTag->getValue())
throw std::invalid_argument("light data missing");
for (auto &section : *sections) {
if (assertValue(section->get<NBT::ByteArrayTag>("Blocks"))->getLength() != SIZE*SIZE*SIZE
|| assertValue(section->get<NBT::ByteArrayTag>("Data"))->getLength() != SIZE*SIZE*SIZE/2)
throw std::invalid_argument("corrupt chunk data");
for (auto &section : *assertValue(level->get<NBT::ListTag<NBT::CompoundTag>>("Sections")))
sections.emplace_back(*section);
maxY = sections.back().getY() + SIZE;
blocks.reset(new Block[maxY * SIZE * SIZE]);
for (auto &section : sections) {
unsigned Y = section.getY();
for (size_t y = 0; y < SIZE; y++) {
for (size_t z = 0; z < SIZE; z++) {
for (size_t x = 0; x < SIZE; x++) {
Block &block = getBlock(x, Y+y, z);
block.id = section.getBlockAt(x, y, z);
block.data = section.getDataAt(x, y, z);
block.blockLight = section.getBlockLightAt(x, y, z);
block.skyLight = section.getSkyLightAt(x, y, z);
}
}
}
uint8_t Chunk::getBlockAt(const std::shared_ptr<const NBT::CompoundTag> &section, size_t x, size_t y, size_t z) const {
return (*section->get<NBT::ByteArrayTag>("Blocks"))[getIndex(x, y, z)];
}
uint8_t Chunk::getDataAt(const std::shared_ptr<const NBT::CompoundTag> &section, size_t x, size_t y, size_t z) const {
size_t i = getIndex(x, y, z);
uint8_t v = (*section->get<NBT::ByteArrayTag>("Data"))[i / 2];
if (i % 2)
return (v >> 4);
else
return (v & 0xf);
}
Chunk::Blocks Chunk::getTopLayer() const {
size_t done = 0;
Blocks blocks = {};
Blocks ret;
for (auto it = sections->rbegin(); it != sections->rend(); ++it) {
for (ssize_t y = maxY-1; y >= 0; y--) {
if (done == SIZE*SIZE)
break;
for (ssize_t y = SIZE-1; y >= 0; y--) {
if (done == SIZE*SIZE)
break;
for (size_t x = 0; x < SIZE; x++) {
for (size_t z = 0; z < SIZE; z++) {
if (blocks.blocks[x][z].id)
for (size_t x = 0; x < SIZE; x++) {
if (ret.blocks[x][z].id)
continue;
uint8_t block = getBlockAt(*it, x, y, z);
if (BLOCK_TYPES[block].opaque) {
blocks.blocks[x][z].id = block;
blocks.blocks[x][z].data = getDataAt(*it, x, y, z);
const Block &block = getBlock(x, y, z);
if (!BLOCK_TYPES[block.id].opaque)
continue;
Block &b = ret.blocks[x][z];
b.id = block.id;
b.data = block.data;
const Block *lightBlock;
if (y < maxY-1)
lightBlock = &getBlock(x, y+1, z);
else
lightBlock = &block;
b.blockLight = lightBlock->blockLight;
b.skyLight = lightBlock->skyLight;
unsigned h;
for (h = y; h > 0; h--) {
const Block &block2 = getBlock(x, h, z);
if (block2.id != 8 && block2.id != 9)
break;
}
b.height = h;
done++;
}
}
}
}
}
return blocks;
return ret;
}
}

89
src/World/Chunk.hpp
View file

@ -30,8 +30,11 @@
#include "Block.hpp"
#include "../Buffer.hpp"
#include "../UniqueCPtr.hpp"
#include "../Util.hpp"
#include "../NBT/CompoundTag.hpp"
#include "../NBT/ListTag.hpp"
#include "../NBT/ByteTag.hpp"
#include "../NBT/ByteArrayTag.hpp"
#include <cstdint>
#include <tuple>
@ -40,42 +43,100 @@
namespace MinedMap {
namespace World {
class Chunk : public std::shared_ptr<const NBT::CompoundTag> {
class Chunk {
public:
static const size_t SIZE = 16;
class Section {
private:
static size_t getIndex(size_t x, size_t y, size_t z) {
if (x >= SIZE || y >= SIZE || z >= SIZE)
throw std::range_error("Chunk::getIndex(): bad coordinates");
return SIZE*SIZE*y + SIZE*z + x;
}
std::shared_ptr<const NBT::ByteArrayTag> blocks;
std::shared_ptr<const NBT::ByteArrayTag> data;
std::shared_ptr<const NBT::ByteArrayTag> blockLight;
std::shared_ptr<const NBT::ByteArrayTag> skyLight;
unsigned Y;
public:
Section(const NBT::CompoundTag &s) {
blocks = assertValue(s.get<NBT::ByteArrayTag>("Blocks"));
data = assertValue(s.get<NBT::ByteArrayTag>("Data"));
blockLight = assertValue(s.get<NBT::ByteArrayTag>("BlockLight"));
skyLight = assertValue(s.get<NBT::ByteArrayTag>("SkyLight"));
if (blocks->getLength() != SIZE*SIZE*SIZE || data->getLength() != SIZE*SIZE*SIZE/2
|| blockLight->getLength() != SIZE*SIZE*SIZE/2 || skyLight->getLength() != SIZE*SIZE*SIZE/2)
throw std::invalid_argument("corrupt chunk data");
Y = assertValue(s.get<NBT::ByteTag>("Y"))->getValue() * SIZE;
}
uint8_t getBlockAt(size_t x, size_t y, size_t z) const {
return blocks->get(getIndex(x, y, z));
}
uint8_t getDataAt(size_t x, size_t y, size_t z) const {
return data->getHalf(getIndex(x, y, z));
}
uint8_t getBlockLightAt(size_t x, size_t y, size_t z) const {
return blockLight->getHalf(getIndex(x, y, z));
}
uint8_t getSkyLightAt(size_t x, size_t y, size_t z) const {
return skyLight->getHalf(getIndex(x, y, z));
}
unsigned getY() const {
return Y;
}
};
struct Blocks {
Block blocks[SIZE][SIZE];
};
private:
static size_t getIndex(size_t x, size_t y, size_t z) {
if (x >= SIZE || y >= SIZE || z >= SIZE)
throw std::range_error("Chunk::getIndex(): bad coordinates");
return 256*y + 16*z + x;
}
size_t len;
UniqueCPtr<uint8_t[]> data;
std::shared_ptr<const NBT::CompoundTag> root;
std::shared_ptr<const NBT::CompoundTag> level;
std::shared_ptr<const NBT::ListTag<NBT::CompoundTag>> sections;
std::vector<Section> sections;
unsigned maxY;
std::unique_ptr<Block[]> blocks;
Block & getBlock(size_t x, size_t y, size_t z) {
return blocks[SIZE*SIZE*y + SIZE*z + x];
}
const Block & getBlock(size_t x, size_t y, size_t z) const {
return blocks[SIZE*SIZE*y + SIZE*z + x];
}
void inflateChunk(Buffer buffer);
void parseChunk();
void analyzeChunk();
uint8_t getBlockAt(const std::shared_ptr<const NBT::CompoundTag> &section, size_t x, size_t y, size_t z) const;
uint8_t getDataAt(const std::shared_ptr<const NBT::CompoundTag> &section, size_t x, size_t y, size_t z) const;
public:
Chunk(Buffer buffer);
const NBT::ListTag<NBT::CompoundTag> & getSections() const {
return *sections;
const NBT::CompoundTag & getLevel() const {
return *level;
}
const std::vector<Section> & getSections() const {
return sections;
}
Blocks getTopLayer() const;