SQCSimulator2023/SQCSim2021/chunk.cpp
2021-12-06 21:41:50 -05:00

160 lines
7.0 KiB
C++

#include "chunk.h"
#include "world.h"
Chunk::Chunk(int x, int y) : m_posX(x), m_posY(y) { m_blocks.Reset(BTYPE_AIR); }
Chunk::Chunk(int x, int y, char data[CHUNK_SIZE_X * CHUNK_SIZE_Y * CHUNK_SIZE_Z]) : m_posX(x), m_posY(y) {
for (int x = 0; x < CHUNK_SIZE_X; ++x)
for (int z = 0; z < CHUNK_SIZE_Z; ++z)
for (int y = 0; y < CHUNK_SIZE_Y; ++y)
m_blocks.Set(x, y, z, data[x + (z * CHUNK_SIZE_X) + (y * CHUNK_SIZE_Z * CHUNK_SIZE_X)]);
}
Chunk::~Chunk() {
if (m_isModified) {
char data[CHUNK_SIZE_X * CHUNK_SIZE_Y * CHUNK_SIZE_Z];
for (int x = 0; x < CHUNK_SIZE_X; ++x)
for (int z = 0; z < CHUNK_SIZE_Z; ++z)
for (int y = 0; y < CHUNK_SIZE_Y; ++y)
data[x + (z * CHUNK_SIZE_X) + (y * CHUNK_SIZE_Z * CHUNK_SIZE_X)] = (char)GetBlock(x, y, z);
std::ostringstream pos;
pos << CHUNK_PATH << m_posX << '_' << m_posY << ".chunk";
std::ofstream output(pos.str(), std::fstream::binary);
output.write(data, sizeof(data));
output.close();
}
}
void Chunk::RemoveBlock(int x, int y, int z, World* world) {
m_blocks.Set(x, y, z, BTYPE_AIR);
CheckNeighbors(x, y, world);
m_isDirty = true;
}
void Chunk::SetBlock(int x, int y, int z, BlockType type, World* world) {
m_blocks.Set(x, y, z, type);
CheckNeighbors(x, z, world);
m_isDirty = true;
}
BlockType Chunk::GetBlock(int x, int y, int z) { return m_blocks.Get(x, y, z); }
void Chunk::CheckNeighbors(int x, int z, World* world) {
int cx, cy;
world->GetScope(cx, cy);
if (x == 0 && m_posX - cx >= 0 &&
world->ChunkAt((m_posX - cx - 1) * CHUNK_SIZE_X, 1, (m_posY - cy) * CHUNK_SIZE_Z))
world->ChunkAt((m_posX - cx - 1) * CHUNK_SIZE_X, 1, (m_posY - cy) * CHUNK_SIZE_Z)->MakeDirty();
else if (x == CHUNK_SIZE_X - 1 && m_posX - cx < WORLD_SIZE_X &&
world->ChunkAt((m_posX - cx + 1) * CHUNK_SIZE_X, 1, (m_posY - cy) * CHUNK_SIZE_Z))
world->ChunkAt((m_posX - cx + 1) * CHUNK_SIZE_X, 1, (m_posY - cy) * CHUNK_SIZE_Z)->MakeDirty();
if (z == 0 && m_posY - cy >= 0 &&
world->ChunkAt((m_posX - cx) * CHUNK_SIZE_X, 1, (m_posY - cy - 1) * CHUNK_SIZE_Z))
world->ChunkAt((m_posX - cx) * CHUNK_SIZE_X, 1, (m_posY - cy - 1) * CHUNK_SIZE_Z)->MakeDirty();
else if (z == CHUNK_SIZE_X - 1 && m_posY - cy < WORLD_SIZE_Y &&
world->ChunkAt((m_posX - cx) * CHUNK_SIZE_X, 1, (m_posY - cy + 1) * CHUNK_SIZE_Z))
world->ChunkAt((m_posX - cx) * CHUNK_SIZE_X, 1, (m_posY - cy + 1) * CHUNK_SIZE_Z)->MakeDirty();
}
void Chunk::GetPosition(int& x, int& y) const { x = m_posX; y = m_posY; }
void Chunk::Update(BlockInfo* blockinfo[BTYPE_LAST], World* world) {
float u, v, s;
// Update mesh
if (m_isDirty) {
int maxVertexCount = (CHUNK_SIZE_X * CHUNK_SIZE_Y * CHUNK_SIZE_Z) * (6 * 4);
VertexBuffer::VertexData* vd = new VertexBuffer::VertexData[maxVertexCount];
int count = 0;
for (int x = 0; x < CHUNK_SIZE_X; ++x) {
for (int z = 0; z < CHUNK_SIZE_Z; ++z) {
for (int y = 0; y < CHUNK_SIZE_Y; ++y) {
if (count > USHRT_MAX)
break;
BlockType bt = GetBlock(x, y, z);
if (bt != BTYPE_AIR) {
blockinfo[bt]->GetTexture(u, v, s);
AddBlockToMesh(vd, count, bt, x, y, z, u, v, s, world);
}
}
}
}
if (count > USHRT_MAX) {
count = USHRT_MAX;
std::cout << "[ Chunk :: Update ] Chunk data truncaned , too much vertices to have a 16 bit index " << std::endl;
}
m_vertexBuffer.SetMeshData(vd, count);
delete[] vd;
}
m_isDirty = false;
}
void Chunk::AddBlockToMesh(VertexBuffer::VertexData* vd, int& count, BlockType bt,
int x, int y, int z, float u, float v, float s, World* world) {
static Perlin perlin = Perlin(2, 4.f, 1.f, 362436);
int cex, cey;
world->GetScope(cex, cey);
int cx = x + (m_posX - cex) * CHUNK_SIZE_X, cy = z + (m_posY - cey) * CHUNK_SIZE_Z;
if (y == CHUNK_SIZE_Y - 1 || GetBlock(x, y + 1, z) == BTYPE_AIR) { // y
vd[count++] = VertexBuffer::VertexData(x, y + 1.f, z, .8f, .8f, .8f, u, v);
vd[count++] = VertexBuffer::VertexData(x, y + 1.f, z + 1.f, .8f, .8f, .8f, u, v + s);
vd[count++] = VertexBuffer::VertexData(x + 1.f, y + 1.f, z + 1.f, .8f, .8f, .8f, u + s, v + s);
vd[count++] = VertexBuffer::VertexData(x + 1.f, y + 1.f, z, .8f, .8f, .8f, u + s, v);
}
if (y == 0 || GetBlock(x, y - 1, z) == BTYPE_AIR) { // -y
vd[count++] = VertexBuffer::VertexData(x, y, z + 1.f, .2f, .2f, .2f, u, v);
vd[count++] = VertexBuffer::VertexData(x, y, z, .2f, .2f, .2f, u, v + s);
vd[count++] = VertexBuffer::VertexData(x + 1.f, y, z, .2f, .2f, .2f, u + s, v + s);
vd[count++] = VertexBuffer::VertexData(x + 1.f, y, z + 1.f, .2f, .2f, .2f, u + s, v);
}
if (world->BlockAt(cx + 1, y, cy) == BTYPE_AIR) { // x
vd[count++] = VertexBuffer::VertexData(x + 1.f, y, z, .9f, .9f, .9f, u, v);
vd[count++] = VertexBuffer::VertexData(x + 1.f, y + 1.f, z, .9f, .9f, .9f, u, v + s);
vd[count++] = VertexBuffer::VertexData(x + 1.f, y + 1.f, z + 1.f, .9f, .9f, .9f, u + s, v + s);
vd[count++] = VertexBuffer::VertexData(x + 1.f, y, z + 1.f, .9f, .9f, .9f, u + s, v);
}
if (world->BlockAt(cx - 1, y, cy) == BTYPE_AIR) { // -x
vd[count++] = VertexBuffer::VertexData(x, y + 1.f, z + 1.f, .5f, .5f, .5f, u, v + s);
vd[count++] = VertexBuffer::VertexData(x, y + 1.f, z, .5f, .5f, .5f, u + s, v + s);
vd[count++] = VertexBuffer::VertexData(x, y, z, .5f, .5f, .5f, u + s, v);
vd[count++] = VertexBuffer::VertexData(x, y, z + 1.f, .5f, .5f, .5f, u, v);
}
if (world->BlockAt(cx, y, cy + 1) == BTYPE_AIR) { // z
vd[count++] = VertexBuffer::VertexData(x, y, z + 1.f, .4f, .4f, .4f, u, v);
vd[count++] = VertexBuffer::VertexData(x + 1.f, y, z + 1.f, .4f, .4f, .4f, u + s, v);
vd[count++] = VertexBuffer::VertexData(x + 1.f, y + 1.f, z + 1.f, .4f, .4f, .4f, u + s, v + s);
vd[count++] = VertexBuffer::VertexData(x, y + 1.f, z + 1.f, .4f, .4f, .4f, u, v + s);
}
if (world->BlockAt(cx, y, cy - 1) == BTYPE_AIR) { // -z
vd[count++] = VertexBuffer::VertexData(x, y + 1.f, z, 1.f, 1.f, 1.f, u, v + s);
vd[count++] = VertexBuffer::VertexData(x + 1.f, y + 1.f, z, 1.f, 1.f, 1.f, u + s, v + s);
vd[count++] = VertexBuffer::VertexData(x + 1.f, y, z , 1.f, 1.f, 1.f, u + s, v);
vd[count++] = VertexBuffer::VertexData(x, y, z , 1.f, 1.f, 1.f, u, v);
}
}
void Chunk::Render() const { m_vertexBuffer.Render(); }
bool Chunk::IsDirty() const { return m_isDirty; }
void Chunk::MakeDirty() { m_isDirty = true; }
void Chunk::MakeModified() { m_isModified = true; }