void ChunkDrawer::generateVBO()
{
m_oglBuffer->clear();
QReadLocker(&m_chunkToDraw->rwLock());
World& workingWorld = m_chunkToDraw->world();
int zi, zj, zk; // These are the coordinates of the zero (0;0;0) block of the chunk (in chunk relative coordinates of course)
m_chunkToDraw->mapToWorld(0, 0, 0, zi, zj, zk);
BlockSet blockSet;
// *********************************************************************************************
// STEP ONE : draw blocks at chunk boudaries (that is to say x=0, y=0, z=0, x=CHUNK_X_SIZE, ...)
// *********************************************************************************************
// x=0
for(int k = 0; k < CHUNK_Z_SIZE; ++k) // z
{
for(int j = 1; j < CHUNK_HEIGHT; ++j) // y, altitude
{
const int i = 0;
blockSet.block = m_chunkToDraw->block(i, j, k);
blockSet.frontBlock = workingWorld.block(BlockPosition(zi + i, zj + j, zk + k - 1));
blockSet.leftBlock = workingWorld.block(BlockPosition(zi + i - 1, zj + j, zk + k));
blockSet.rightBlock = workingWorld.block(BlockPosition(zi + i + 1, zj + j, zk + k));
blockSet.backBlock = workingWorld.block(BlockPosition(zi + i, zj + j, zk + k + 1));
blockSet.topBlock = workingWorld.block(BlockPosition(zi + i, zj + j + 1, zk + k));
blockSet.topFrontBlock = workingWorld.block(BlockPosition(zi + i, zj + j + 1, zk + k - 1));
blockSet.topLeftBlock = workingWorld.block(BlockPosition(zi + i - 1, zj + j + 1, zk + k));
blockSet.topRightBlock = workingWorld.block(BlockPosition(zi + i + 1, zj + j + 1, zk + k));
blockSet.topBackBlock = workingWorld.block(BlockPosition(zi + i, zj + j + 1, zk + k + 1));
blockSet.topFrontLeftBlock = workingWorld.block(BlockPosition(zi + i - 1, zj + j + 1, zk + k - 1));
blockSet.topFrontRightBlock = workingWorld.block(BlockPosition(zi + i + 1, zj + j + 1, zk + k - 1));
blockSet.topBackLeftBlock = workingWorld.block(BlockPosition(zi + i - 1, zj + j + 1, zk + k + 1));
blockSet.topBackRightBlock = workingWorld.block(BlockPosition(zi + i + 1, zj + j + 1, zk + k + 1));
blockSet.bottomBlock = workingWorld.block(BlockPosition(zi + i, zj + j - 1, zk + k));
blockSet.block->descriptor().render(*m_oglBuffer, blockSet, BlockPosition(zi + i, zj + j, zk + k), workingWorld);
}
}
// y=0
for(int i = 0; i < CHUNK_X_SIZE; ++i) // x
{
for(int k = 0; k < CHUNK_Z_SIZE; ++k) // z
{
const int j = 0;
blockSet.block = m_chunkToDraw->block(i, j, k);
blockSet.frontBlock = workingWorld.block(BlockPosition(zi + i, zj + j, zk + k - 1));
blockSet.leftBlock = workingWorld.block(BlockPosition(zi + i - 1, zj + j, zk + k));
blockSet.rightBlock = workingWorld.block(BlockPosition(zi + i + 1, zj + j, zk + k));
blockSet.backBlock = workingWorld.block(BlockPosition(zi + i, zj + j, zk + k + 1));
blockSet.topBlock = workingWorld.block(BlockPosition(zi + i, zj + j + 1, zk + k));
blockSet.topFrontBlock = workingWorld.block(BlockPosition(zi + i, zj + j + 1, zk + k - 1));
blockSet.topLeftBlock = workingWorld.block(BlockPosition(zi + i - 1, zj + j + 1, zk + k));
blockSet.topRightBlock = workingWorld.block(BlockPosition(zi + i + 1, zj + j + 1, zk + k));
blockSet.topBackBlock = workingWorld.block(BlockPosition(zi + i, zj + j + 1, zk + k + 1));
blockSet.topFrontLeftBlock = workingWorld.block(BlockPosition(zi + i - 1, zj + j + 1, zk + k - 1));
blockSet.topFrontRightBlock = workingWorld.block(BlockPosition(zi + i + 1, zj + j + 1, zk + k - 1));
blockSet.topBackLeftBlock = workingWorld.block(BlockPosition(zi + i - 1, zj + j + 1, zk + k + 1));
blockSet.topBackRightBlock = workingWorld.block(BlockPosition(zi + i + 1, zj + j + 1, zk + k + 1));
blockSet.bottomBlock = workingWorld.block(BlockPosition(zi + i, zj + j - 1, zk + k));
blockSet.block->descriptor().render(*m_oglBuffer, blockSet, BlockPosition(zi + i, zj + j, zk + k), workingWorld);
}
}
// z=0
for(int i = 0; i < CHUNK_X_SIZE; ++i) // x
{
for(int j = 0; j < CHUNK_HEIGHT; ++j) // y, altitude
{
const int k = 0;
blockSet.block = m_chunkToDraw->block(i, j, k);
blockSet.frontBlock = workingWorld.block(BlockPosition(zi + i, zj + j, zk + k - 1));
blockSet.leftBlock = workingWorld.block(BlockPosition(zi + i - 1, zj + j, zk + k));
blockSet.rightBlock = workingWorld.block(BlockPosition(zi + i + 1, zj + j, zk + k));
blockSet.backBlock = workingWorld.block(BlockPosition(zi + i, zj + j, zk + k + 1));
blockSet.topBlock = workingWorld.block(BlockPosition(zi + i, zj + j + 1, zk + k));
blockSet.topFrontBlock = workingWorld.block(BlockPosition(zi + i, zj + j + 1, zk + k - 1));
blockSet.topLeftBlock = workingWorld.block(BlockPosition(zi + i - 1, zj + j + 1, zk + k));
blockSet.topRightBlock = workingWorld.block(BlockPosition(zi + i + 1, zj + j + 1, zk + k));
blockSet.topBackBlock = workingWorld.block(BlockPosition(zi + i, zj + j + 1, zk + k + 1));
blockSet.topFrontLeftBlock = workingWorld.block(BlockPosition(zi + i - 1, zj + j + 1, zk + k - 1));
blockSet.topFrontRightBlock = workingWorld.block(BlockPosition(zi + i + 1, zj + j + 1, zk + k - 1));
blockSet.topBackLeftBlock = workingWorld.block(BlockPosition(zi + i - 1, zj + j + 1, zk + k + 1));
blockSet.topBackRightBlock = workingWorld.block(BlockPosition(zi + i + 1, zj + j + 1, zk + k + 1));
blockSet.bottomBlock = workingWorld.block(BlockPosition(zi + i, zj + j - 1, zk + k));
blockSet.block->descriptor().render(*m_oglBuffer, blockSet, BlockPosition(zi + i, zj + j, zk + k), workingWorld);
}
}
// x=CHUNK_X_SIZE
for(int k = 0; k < CHUNK_Z_SIZE; ++k) // z
{
for(int j = 1; j < CHUNK_HEIGHT; ++j) // y, altitude
{
const int i = CHUNK_X_SIZE - 1;
blockSet.block = m_chunkToDraw->block(i, j, k);
blockSet.frontBlock = workingWorld.block(BlockPosition(zi + i, zj + j, zk + k - 1));
blockSet.leftBlock = workingWorld.block(BlockPosition(zi + i - 1, zj + j, zk + k));
blockSet.rightBlock = workingWorld.block(BlockPosition(zi + i + 1, zj + j, zk + k));
blockSet.backBlock = workingWorld.block(BlockPosition(zi + i, zj + j, zk + k + 1));
blockSet.topBlock = workingWorld.block(BlockPosition(zi + i, zj + j + 1, zk + k));
blockSet.topFrontBlock = workingWorld.block(BlockPosition(zi + i, zj + j + 1, zk + k - 1));
blockSet.topLeftBlock = workingWorld.block(BlockPosition(zi + i - 1, zj + j + 1, zk + k));
blockSet.topRightBlock = workingWorld.block(BlockPosition(zi + i + 1, zj + j + 1, zk + k));
blockSet.topBackBlock = workingWorld.block(BlockPosition(zi + i, zj + j + 1, zk + k + 1));
blockSet.topFrontLeftBlock = workingWorld.block(BlockPosition(zi + i - 1, zj + j + 1, zk + k - 1));
blockSet.topFrontRightBlock = workingWorld.block(BlockPosition(zi + i + 1, zj + j + 1, zk + k - 1));
blockSet.topBackLeftBlock = workingWorld.block(BlockPosition(zi + i - 1, zj + j + 1, zk + k + 1));
blockSet.topBackRightBlock = workingWorld.block(BlockPosition(zi + i + 1, zj + j + 1, zk + k + 1));
blockSet.bottomBlock = workingWorld.block(BlockPosition(zi + i, zj + j - 1, zk + k));
blockSet.block->descriptor().render(*m_oglBuffer, blockSet, BlockPosition(zi + i, zj + j, zk + k), workingWorld);
}
}
// y=CHUNK_Y_SIZE
for(int i = 0; i < CHUNK_X_SIZE; ++i) // x
{
for(int k = 0; k < CHUNK_Z_SIZE; ++k) // z
{
const int j = CHUNK_Y_SIZE - 1;
blockSet.block = m_chunkToDraw->block(i, j, k);
blockSet.frontBlock = workingWorld.block(BlockPosition(zi + i, zj + j, zk + k - 1));
blockSet.leftBlock = workingWorld.block(BlockPosition(zi + i - 1, zj + j, zk + k));
blockSet.rightBlock = workingWorld.block(BlockPosition(zi + i + 1, zj + j, zk + k));
blockSet.backBlock = workingWorld.block(BlockPosition(zi + i, zj + j, zk + k + 1));
blockSet.topBlock = workingWorld.block(BlockPosition(zi + i, zj + j + 1, zk + k));
blockSet.topFrontBlock = workingWorld.block(BlockPosition(zi + i, zj + j + 1, zk + k - 1));
blockSet.topLeftBlock = workingWorld.block(BlockPosition(zi + i - 1, zj + j + 1, zk + k));
blockSet.topRightBlock = workingWorld.block(BlockPosition(zi + i + 1, zj + j + 1, zk + k));
blockSet.topBackBlock = workingWorld.block(BlockPosition(zi + i, zj + j + 1, zk + k + 1));
blockSet.topFrontLeftBlock = workingWorld.block(BlockPosition(zi + i - 1, zj + j + 1, zk + k - 1));
blockSet.topFrontRightBlock = workingWorld.block(BlockPosition(zi + i + 1, zj + j + 1, zk + k - 1));
blockSet.topBackLeftBlock = workingWorld.block(BlockPosition(zi + i - 1, zj + j + 1, zk + k + 1));
blockSet.topBackRightBlock = workingWorld.block(BlockPosition(zi + i + 1, zj + j + 1, zk + k + 1));
blockSet.bottomBlock = workingWorld.block(BlockPosition(zi + i, zj + j - 1, zk + k));
blockSet.block->descriptor().render(*m_oglBuffer, blockSet, BlockPosition(zi + i, zj + j, zk + k), workingWorld);
}
}
// z=CHUNK_Z_SIZE
for(int i = 0; i < CHUNK_X_SIZE; ++i) // x
{
const int k = CHUNK_Z_SIZE - 1;
for(int j = 0; j < CHUNK_HEIGHT; ++j) // y, altitude
{
blockSet.block = m_chunkToDraw->block(i, j, k);
blockSet.frontBlock = workingWorld.block(BlockPosition(zi + i, zj + j, zk + k - 1));
blockSet.leftBlock = workingWorld.block(BlockPosition(zi + i - 1, zj + j, zk + k));
blockSet.rightBlock = workingWorld.block(BlockPosition(zi + i + 1, zj + j, zk + k));
blockSet.backBlock = workingWorld.block(BlockPosition(zi + i, zj + j, zk + k + 1));
blockSet.topBlock = workingWorld.block(BlockPosition(zi + i, zj + j + 1, zk + k));
blockSet.topFrontBlock = workingWorld.block(BlockPosition(zi + i, zj + j + 1, zk + k - 1));
blockSet.topLeftBlock = workingWorld.block(BlockPosition(zi + i - 1, zj + j + 1, zk + k));
blockSet.topRightBlock = workingWorld.block(BlockPosition(zi + i + 1, zj + j + 1, zk + k));
blockSet.topBackBlock = workingWorld.block(BlockPosition(zi + i, zj + j + 1, zk + k + 1));
blockSet.topFrontLeftBlock = workingWorld.block(BlockPosition(zi + i - 1, zj + j + 1, zk + k - 1));
blockSet.topFrontRightBlock = workingWorld.block(BlockPosition(zi + i + 1, zj + j + 1, zk + k - 1));
blockSet.topBackLeftBlock = workingWorld.block(BlockPosition(zi + i - 1, zj + j + 1, zk + k + 1));
blockSet.topBackRightBlock = workingWorld.block(BlockPosition(zi + i + 1, zj + j + 1, zk + k + 1));
blockSet.bottomBlock = workingWorld.block(BlockPosition(zi + i, zj + j - 1, zk + k));
blockSet.block->descriptor().render(*m_oglBuffer, blockSet, BlockPosition(zi + i, zj + j, zk + k), workingWorld);
}
}
// ************************************************************************************************
// STEP TWO : draw blocks at the middle of the chunk (avoid many World::block() slow function call)
// ************************************************************************************************
for(int k = 1; k < CHUNK_Z_SIZE - 1; ++k) // z
{
for(int i = 1; i < CHUNK_X_SIZE - 1; ++i) // x
{
blockSet.block = m_chunkToDraw->block(i, 0, k);
blockSet.frontBlock = m_chunkToDraw->block(i, 0, k - 1);
blockSet.leftBlock = m_chunkToDraw->block(i - 1, 0, k);
blockSet.rightBlock = m_chunkToDraw->block(i + 1, 0, k);
blockSet.backBlock = m_chunkToDraw->block(i, 0, k + 1);
blockSet.topBlock = m_chunkToDraw->block(i, 0 + 1, k);
blockSet.topFrontBlock = m_chunkToDraw->block(i, 0 + 1, k - 1);
blockSet.topLeftBlock = m_chunkToDraw->block(i - 1, 0 + 1, k);
blockSet.topRightBlock = m_chunkToDraw->block(i + 1, 0 + 1, k);
blockSet.topBackBlock = m_chunkToDraw->block(i, 0 + 1, k + 1);
blockSet.topFrontLeftBlock = m_chunkToDraw->block(i - 1, 0 + 1, k - 1);
blockSet.topFrontRightBlock = m_chunkToDraw->block(i + 1, 0 + 1, k - 1);
blockSet.topBackLeftBlock = m_chunkToDraw->block(i - 1, 0 + 1, k + 1);
blockSet.topBackRightBlock = m_chunkToDraw->block(i + 1, 0 + 1, k + 1);
blockSet.bottomBlock = m_chunkToDraw->block(i, 0 - 1, k);
for(int j = 1; j < CHUNK_HEIGHT - 1; ++j) // y, altitude
{
pushBlockSetUpwards(blockSet);
blockSet.topBlock = m_chunkToDraw->block(i, j + 1, k);
blockSet.topFrontBlock = m_chunkToDraw->block(i, j + 1, k - 1);
blockSet.topLeftBlock = m_chunkToDraw->block(i - 1, j + 1, k);
blockSet.topRightBlock = m_chunkToDraw->block(i + 1, j + 1, k);
blockSet.topBackBlock = m_chunkToDraw->block(i, j + 1, k + 1);
blockSet.topFrontLeftBlock = m_chunkToDraw->block(i - 1, j + 1, k - 1);
blockSet.topFrontRightBlock = m_chunkToDraw->block(i + 1, j + 1, k - 1);
blockSet.topBackLeftBlock = m_chunkToDraw->block(i - 1, j + 1, k + 1);
blockSet.topBackRightBlock = m_chunkToDraw->block(i + 1, j + 1, k + 1);
blockSet.block->descriptor().render(*m_oglBuffer, blockSet, BlockPosition(zi + i, zj + j, zk + k), workingWorld);
} // j
} // i
} // k
}
const QByteArray PolyVoxEntityItem::getVoxelData() const {
QReadLocker(&this->_voxelDataLock);
return _voxelData;
}
