132 lines
6.1 KiB
C++
132 lines
6.1 KiB
C++
#include "chunk.h"
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#include "world.h"
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Chunk::Chunk(int x, int y) : m_posX(x), m_posY(y) { m_blocks.Reset(BTYPE_AIR); }
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Chunk::~Chunk() { }
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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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CheckNeighbors(x, y, world);
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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(int x, int z, World* world) {
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if (x == 0 && m_posX > 0 &&
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world->ChunkAt((m_posX - 1) * CHUNK_SIZE_X, 1, m_posY * CHUNK_SIZE_Z) &&
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!world->ChunkAt((m_posX - 1) * CHUNK_SIZE_X, 1, m_posY * CHUNK_SIZE_Z)->IsDirty())
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world->ChunkAt((m_posX - 1) * CHUNK_SIZE_X, 1, m_posY * CHUNK_SIZE_Z)->MakeDirty();
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else if (x == CHUNK_SIZE_X - 1 && m_posX < VIEW_DISTANCE &&
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world->ChunkAt((m_posX + 1) * CHUNK_SIZE_X, 1, m_posY * CHUNK_SIZE_Z) &&
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!world->ChunkAt((m_posX + 1) * CHUNK_SIZE_X, 1, m_posY * CHUNK_SIZE_Z)->IsDirty())
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world->ChunkAt((m_posX + 1) * CHUNK_SIZE_X, 1, m_posY * CHUNK_SIZE_Z)->MakeDirty();
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if (z == 0 && m_posY > 0 &&
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world->ChunkAt(m_posX * CHUNK_SIZE_X, 1, (m_posY - 1) * CHUNK_SIZE_Z) &&
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!world->ChunkAt(m_posX * CHUNK_SIZE_X, 1, (m_posY - 1) * CHUNK_SIZE_Z)->IsDirty())
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world->ChunkAt(m_posX * CHUNK_SIZE_X, 1, (m_posY - 1) * CHUNK_SIZE_Z)->MakeDirty();
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else if (z == CHUNK_SIZE_X - 1 && m_posY < VIEW_DISTANCE &&
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world->ChunkAt(m_posX * CHUNK_SIZE_X, 1, (m_posY + 1) * CHUNK_SIZE_Z) &&
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!world->ChunkAt(m_posX * CHUNK_SIZE_X, 1, (m_posY + 1) * CHUNK_SIZE_Z)->IsDirty())
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world->ChunkAt(m_posX * CHUNK_SIZE_X, 1, (m_posY + 1) * CHUNK_SIZE_Z)->MakeDirty();
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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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VertexBuffer::VertexData* vd = new VertexBuffer::VertexData[maxVertexCount];
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int count = 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 (count > 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(vd, count, 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 (count > USHRT_MAX) {
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count = 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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m_vertexBuffer.SetMeshData(vd, count);
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delete[] vd;
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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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int cx = x + m_posX * CHUNK_SIZE_X, cy = z + m_posY * 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, .8f, .8f, .8f, u, v);
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vd[count++] = VertexBuffer::VertexData(x, y, z, .8f, .8f, .8f, u, v + s);
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vd[count++] = VertexBuffer::VertexData(x + 1.f, y, z, .8f, .8f, .8f, u + s, v + s);
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vd[count++] = VertexBuffer::VertexData(x + 1.f, y, z + 1.f, .8f, .8f, .8f, u + s, v);
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}
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if (cx == INT16_MAX - 1 || 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 (cx == 0 || world->BlockAt(cx - 1, y, cy) == BTYPE_AIR) { // -x
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vd[count++] = VertexBuffer::VertexData(x, y + 1.f, z + 1.f, .9f, .9f, .9f, u, v + s);
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vd[count++] = VertexBuffer::VertexData(x, y + 1.f, z, .9f, .9f, .9f, u + s, v + s);
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vd[count++] = VertexBuffer::VertexData(x, y, z, .9f, .9f, .9f, u + s, v);
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vd[count++] = VertexBuffer::VertexData(x, y, z + 1.f, .9f, .9f, .9f, u, v);
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}
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if (cy == INT16_MAX - 1 || world->BlockAt(cx, y, cy + 1) == BTYPE_AIR) { // z
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vd[count++] = VertexBuffer::VertexData(x, y, z + 1.f, 1.f, 1.f, 1.f, u, v);
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vd[count++] = VertexBuffer::VertexData(x + 1.f, y, z + 1.f, 1.f, 1.f, 1.f, u + s, v);
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vd[count++] = VertexBuffer::VertexData(x + 1.f, y + 1.f, z + 1.f, 1.f, 1.f, 1.f, u + s, v + s);
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vd[count++] = VertexBuffer::VertexData(x, y + 1.f, z + 1.f, 1.f, 1.f, 1.f, u, v + s);
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}
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if (cy == 0 || 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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