235 lines
10 KiB
C++
235 lines
10 KiB
C++
#include "chunk.h"
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#include "world.h"
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Chunk::Chunk(unsigned int x, unsigned int y) : m_posX(x), m_posY(y) {
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std::ostringstream pos; // Vérifie l'existence d'un fichier .chunk avec sa position.
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pos << CHUNK_PATH << x << '_' << y << ".chunk";
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std::ifstream input(pos.str(), std::fstream::binary);
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if (input.fail()) {
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OpenSimplexNoise::Noise simplex = OpenSimplexNoise::Noise(SEED);
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m_blocks.Reset(BTYPE_AIR);
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for (int ix = 0; ix < CHUNK_SIZE_X; ++ix) // Montagnes
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for (int iz = 0; iz < CHUNK_SIZE_Z; ++iz) {
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float xnoiz, ynoiz;
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xnoiz = (double)(ix + x * CHUNK_SIZE_X) / 1024.;
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ynoiz = (double)(iz + y * CHUNK_SIZE_Z) / 1024.;
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double height = 0;
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for (int x = 0; x < 39; ++x) {
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height += simplex.eval(xnoiz, ynoiz);
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height *= .79;
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xnoiz *= 1.139;
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ynoiz *= 1.139;
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}
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height = height * 2000. * simplex.eval((double)(ix + x * CHUNK_SIZE_X) / 512., (double)(iz + y * CHUNK_SIZE_Z) / 512.);
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height /= (CHUNK_SIZE_Y / 1.9);
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height += 15.;
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for (int iy = 0; iy <= (int)height % CHUNK_SIZE_Y; ++iy)
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SetBlock(ix, iy, iz, BTYPE_METAL, nullptr);
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}
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for (int ix = 0; ix < CHUNK_SIZE_X; ++ix) // Collines
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for (int iz = 0; iz < CHUNK_SIZE_Z; ++iz) {
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float xnoiz, ynoiz;
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xnoiz = (double)(ix + x * CHUNK_SIZE_X) / 512.;
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ynoiz = (double)(iz + y * CHUNK_SIZE_Z) / 512.;
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float height = simplex.eval(xnoiz, ynoiz) * 50.f;// +1.f;
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for (int iy = 0; iy <= (int)height % CHUNK_SIZE_Y; ++iy) {
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if (GetBlock(ix, iy, iz) == BTYPE_AIR)
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SetBlock(ix, iy, iz, BTYPE_GRASS, nullptr);
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}
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}
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for (int ix = 0; ix < CHUNK_SIZE_X; ++ix) // "Lacs"
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for (int iz = 0; iz < CHUNK_SIZE_Z; ++iz) {
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for (int iy = 0; iy < 13; ++iy) {
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if (GetBlock(ix, iy, iz) == BTYPE_AIR)
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SetBlock(ix, iy, iz, BTYPE_ICE, nullptr);
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}
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}
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//for (int ix = 0; ix < CHUNK_SIZE_X; ++ix) // "Arbres"
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// for (int iz = 0; iz < CHUNK_SIZE_Z; ++iz) {
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// float xnoiz, ynoiz;
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// xnoiz = (double)(iz * CHUNK_SIZE_Y + x * CHUNK_SIZE_X) / 256.;
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// ynoiz = (double)(ix * CHUNK_SIZE_Y + y * CHUNK_SIZE_Z) / 256.;
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// bool tree = (int)(abs(simplex.eval(xnoiz, ynoiz)) * 17933.f) % CHUNK_SIZE_Y > 126 ? true : false;
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// for (int iy = 0; iy < CHUNK_SIZE_Y - 10; ++iy)
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// if (GetBlock(ix, iy, iz) == BTYPE_AIR)
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// if (GetBlock(ix, iy - 1, iz) == BTYPE_GRASS)
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// if (tree) {
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// for (int i = 0; i < (int)(abs(simplex.eval(xnoiz, ynoiz) * 4)) % 42 + 1; ++i)
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// SetBlock(ix, iy + i, iz, BTYPE_DIRT, nullptr);
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// break;
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// }
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// }
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}
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else {
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input.seekg(0, std::ios_base::end);
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int size = input.tellg();
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input.seekg(0, std::ios_base::beg);
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char data[CHUNK_SIZE_X * CHUNK_SIZE_Y * CHUNK_SIZE_Z];
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input.read(data, size);
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input.close();
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for (int ix = 0; ix < CHUNK_SIZE_X; ++ix)
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for (int iz = 0; iz < CHUNK_SIZE_Z; ++iz)
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for (int iy = 0; iy < CHUNK_SIZE_Y; ++iy)
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m_blocks.Set(ix, iy, iz, data[ix + (iz * CHUNK_SIZE_X) + (iy * CHUNK_SIZE_Z * CHUNK_SIZE_X)]);
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}
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}
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Chunk::~Chunk() {
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if (m_isModified) {
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char data[CHUNK_SIZE_X * CHUNK_SIZE_Y * CHUNK_SIZE_Z];
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for (int x = 0; x < CHUNK_SIZE_X; ++x)
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for (int z = 0; z < CHUNK_SIZE_Z; ++z)
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for (int y = 0; y < CHUNK_SIZE_Y; ++y)
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data[x + (z * CHUNK_SIZE_X) + (y * CHUNK_SIZE_Z * CHUNK_SIZE_X)] = (char)GetBlock(x, y, z);
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std::ostringstream pos;
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pos << CHUNK_PATH << m_posX << '_' << m_posY << ".chunk";
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std::ofstream output(pos.str(), std::fstream::binary);
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output.write(data, sizeof(data));
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output.close();
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}
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}
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void Chunk::RemoveBlock(int x, int y, int z, World* world) {
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m_blocks.Set(x, y, z, BTYPE_AIR);
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CheckNeighbors(x, y, world);
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m_isDirty = true;
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}
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void Chunk::SetBlock(int x, int y, int z, BlockType type, World* world) {
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m_blocks.Set(x, y, z, type);
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if (world) CheckNeighbors(x, z, world); // Si nullptr, ne pas vérifier les chunks voisines.
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m_isDirty = true;
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}
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BlockType Chunk::GetBlock(int x, int y, int z) { return m_blocks.Get(x, y, z); }
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void Chunk::CheckNeighbors(unsigned int x, unsigned int z, World* world) {
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unsigned int cx, cy;
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world->GetScope(cx, cy);
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if (x == 0 && m_posX - cx >= 0 &&
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world->ChunkAt((m_posX - cx - 1) * CHUNK_SIZE_X, 1, (m_posY - cy) * CHUNK_SIZE_Z))
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world->ChunkAt((m_posX - cx - 1) * CHUNK_SIZE_X, 1, (m_posY - cy) * CHUNK_SIZE_Z)->MakeDirty();
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else if (x == CHUNK_SIZE_X - 1 && m_posX - cx < WORLD_SIZE_X &&
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world->ChunkAt((m_posX - cx + 1) * CHUNK_SIZE_X, 1, (m_posY - cy) * CHUNK_SIZE_Z))
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world->ChunkAt((m_posX - cx + 1) * CHUNK_SIZE_X, 1, (m_posY - cy) * CHUNK_SIZE_Z)->MakeDirty();
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if (z == 0 && m_posY - cy >= 0 &&
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world->ChunkAt((m_posX - cx) * CHUNK_SIZE_X, 1, (m_posY - cy - 1) * CHUNK_SIZE_Z))
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world->ChunkAt((m_posX - cx) * CHUNK_SIZE_X, 1, (m_posY - cy - 1) * CHUNK_SIZE_Z)->MakeDirty();
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else if (z == CHUNK_SIZE_X - 1 && m_posY - cy < WORLD_SIZE_Y &&
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world->ChunkAt((m_posX - cx) * CHUNK_SIZE_X, 1, (m_posY - cy + 1) * CHUNK_SIZE_Z))
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world->ChunkAt((m_posX - cx) * CHUNK_SIZE_X, 1, (m_posY - cy + 1) * CHUNK_SIZE_Z)->MakeDirty();
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}
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void Chunk::GetPosition(unsigned int& x, unsigned int& y) const { x = m_posX; y = m_posY; }
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void Chunk::FlushMeshToVBO() {
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m_vertexBuffer.SetMeshData(m_vd, m_vcount);
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m_vcount = 0;
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delete[] m_vd;
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}
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void Chunk::FlushVBO() {
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m_vertexBuffer.Flush();
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}
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void Chunk::Update(BlockInfo* blockinfo[BTYPE_LAST], World* world) {
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float u, v, s;
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// Update mesh
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if (m_isDirty) {
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int maxVertexCount = (CHUNK_SIZE_X * CHUNK_SIZE_Y * CHUNK_SIZE_Z) * (6 * 4);
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m_vd = new VertexBuffer::VertexData[maxVertexCount];
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m_vcount = 0;
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for (int x = 0; x < CHUNK_SIZE_X; ++x) {
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for (int z = 0; z < CHUNK_SIZE_Z; ++z) {
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for (int y = 0; y < CHUNK_SIZE_Y; ++y) {
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if (m_vcount > USHRT_MAX)
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break;
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BlockType bt = GetBlock(x, y, z);
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if (bt != BTYPE_AIR) {
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blockinfo[bt]->GetTexture(u, v, s);
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AddBlockToMesh(m_vd, m_vcount, bt, x, y, z, u, v, s, world);
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}
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}
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}
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}
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if (m_vcount > USHRT_MAX) {
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m_vcount = USHRT_MAX;
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std::cout << "[ Chunk :: Update ] Chunk data truncaned , too much vertices to have a 16 bit index " << std::endl;
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}
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}
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m_isDirty = false;
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}
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void Chunk::AddBlockToMesh(VertexBuffer::VertexData* vd, int& count, BlockType bt,
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int x, int y, int z, float u, float v, float s, World* world) {
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unsigned int cex, cey;
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world->GetScope(cex, cey);
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int cx = x + (m_posX - cex) * CHUNK_SIZE_X, cy = z + (m_posY - cey) * CHUNK_SIZE_Z;
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if (y == CHUNK_SIZE_Y - 1 || GetBlock(x, y + 1, z) == BTYPE_AIR) { // y
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vd[count++] = VertexBuffer::VertexData(x, y + 1.f, z, .8f, .8f, .8f, u, v);
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vd[count++] = VertexBuffer::VertexData(x, y + 1.f, z + 1.f, .8f, .8f, .8f, u, v + s);
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vd[count++] = VertexBuffer::VertexData(x + 1.f, y + 1.f, z + 1.f, .8f, .8f, .8f, u + s, v + s);
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vd[count++] = VertexBuffer::VertexData(x + 1.f, y + 1.f, z, .8f, .8f, .8f, u + s, v);
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}
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if (y == 0 || GetBlock(x, y - 1, z) == BTYPE_AIR) { // -y
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vd[count++] = VertexBuffer::VertexData(x, y, z + 1.f, .2f, .2f, .2f, u, v);
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vd[count++] = VertexBuffer::VertexData(x, y, z, .2f, .2f, .2f, u, v + s);
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vd[count++] = VertexBuffer::VertexData(x + 1.f, y, z, .2f, .2f, .2f, u + s, v + s);
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vd[count++] = VertexBuffer::VertexData(x + 1.f, y, z + 1.f, .2f, .2f, .2f, u + s, v);
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}
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if (world->BlockAt(cx + 1, y, cy) == BTYPE_AIR) { // x
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vd[count++] = VertexBuffer::VertexData(x + 1.f, y, z, .9f, .9f, .9f, u, v);
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vd[count++] = VertexBuffer::VertexData(x + 1.f, y + 1.f, z, .9f, .9f, .9f, u, v + s);
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vd[count++] = VertexBuffer::VertexData(x + 1.f, y + 1.f, z + 1.f, .9f, .9f, .9f, u + s, v + s);
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vd[count++] = VertexBuffer::VertexData(x + 1.f, y, z + 1.f, .9f, .9f, .9f, u + s, v);
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}
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if (world->BlockAt(cx - 1, y, cy) == BTYPE_AIR) { // -x
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vd[count++] = VertexBuffer::VertexData(x, y + 1.f, z + 1.f, .5f, .5f, .5f, u, v + s);
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vd[count++] = VertexBuffer::VertexData(x, y + 1.f, z, .5f, .5f, .5f, u + s, v + s);
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vd[count++] = VertexBuffer::VertexData(x, y, z, .5f, .5f, .5f, u + s, v);
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vd[count++] = VertexBuffer::VertexData(x, y, z + 1.f, .5f, .5f, .5f, u, v);
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}
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if (world->BlockAt(cx, y, cy + 1) == BTYPE_AIR) { // z
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vd[count++] = VertexBuffer::VertexData(x, y, z + 1.f, .4f, .4f, .4f, u, v);
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vd[count++] = VertexBuffer::VertexData(x + 1.f, y, z + 1.f, .4f, .4f, .4f, u + s, v);
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vd[count++] = VertexBuffer::VertexData(x + 1.f, y + 1.f, z + 1.f, .4f, .4f, .4f, u + s, v + s);
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vd[count++] = VertexBuffer::VertexData(x, y + 1.f, z + 1.f, .4f, .4f, .4f, u, v + s);
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}
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if (world->BlockAt(cx, y, cy - 1) == BTYPE_AIR) { // -z
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vd[count++] = VertexBuffer::VertexData(x, y + 1.f, z, 1.f, 1.f, 1.f, u, v + s);
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vd[count++] = VertexBuffer::VertexData(x + 1.f, y + 1.f, z, 1.f, 1.f, 1.f, u + s, v + s);
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vd[count++] = VertexBuffer::VertexData(x + 1.f, y, z , 1.f, 1.f, 1.f, u + s, v);
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vd[count++] = VertexBuffer::VertexData(x, y, z , 1.f, 1.f, 1.f, u, v);
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}
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}
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void Chunk::Render() const { m_vertexBuffer.Render(); }
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bool Chunk::IsDirty() const { return m_isDirty; }
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void Chunk::MakeDirty() { m_isDirty = true; }
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void Chunk::MakeModified() { m_isModified = true; }
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