void VoxelManipulator::copyTo(MapNode *dst, VoxelArea dst_area, v3s16 dst_pos, v3s16 from_pos, v3s16 size) { for(s16 z=0; z<size.Z; z++) for(s16 y=0; y<size.Y; y++) { s32 i_dst = dst_area.index(dst_pos.X, dst_pos.Y+y, dst_pos.Z+z); s32 i_local = m_area.index(from_pos.X, from_pos.Y+y, from_pos.Z+z); memcpy(&dst[i_dst], &m_data[i_local], size.X*sizeof(MapNode)); } }
void VoxelManipulator::copyFrom(MapNode *src, VoxelArea src_area, v3s16 from_pos, v3s16 to_pos, v3s16 size) { for(s16 z=0; z<size.Z; z++) for(s16 y=0; y<size.Y; y++) { s32 i_src = src_area.index(from_pos.X, from_pos.Y+y, from_pos.Z+z); s32 i_local = m_area.index(to_pos.X, to_pos.Y+y, to_pos.Z+z); memcpy(&m_data[i_local], &src[i_src], size.X*sizeof(MapNode)); memset(&m_flags[i_local], 0, size.X); } }
void VoxelManipulator::copyTo(MapNode *dst, const VoxelArea& dst_area, v3s16 dst_pos, v3s16 from_pos, v3s16 size) { for(s16 z=0; z<size.Z; z++) for(s16 y=0; y<size.Y; y++) { s32 i_dst = dst_area.index(dst_pos.X, dst_pos.Y+y, dst_pos.Z+z); s32 i_local = m_area.index(from_pos.X, from_pos.Y+y, from_pos.Z+z); for (s16 x = 0; x < size.X; x++) { if (m_data[i_local].getContent() != CONTENT_IGNORE) dst[i_dst] = m_data[i_local]; i_dst++; i_local++; } } }
void VoxelManipulator::copyFrom(MapNode *src, const VoxelArea& src_area, v3s16 from_pos, v3s16 to_pos, v3s16 size) { /* The reason for this optimised code is that we're a member function * and the data type/layout of m_data is know to us: it's stored as * [z*h*w + y*h + x]. Therefore we can take the calls to m_area index * (which performs the preceding mapping/indexing of m_data) out of the * inner loop and calculate the next index as we're iterating to gain * performance. * * src_step and dest_step is the amount required to be added to our index * every time y increments. Because the destination area may be larger * than the source area we need one additional variable (otherwise we could * just continue adding dest_step as is done for the source data): dest_mod. * dest_mod is the difference in size between a "row" in the source data * and a "row" in the destination data (I am using the term row loosely * and for illustrative purposes). E.g. * * src <-------------------->|'''''' dest mod '''''''' * dest <---------------------------------------------> * * dest_mod (it's essentially a modulus) is added to the destination index * after every full iteration of the y span. * * This method falls under the category "linear array and incrementing * index". */ s32 src_step = src_area.getExtent().X; s32 dest_step = m_area.getExtent().X; s32 dest_mod = m_area.index(to_pos.X, to_pos.Y, to_pos.Z + 1) - m_area.index(to_pos.X, to_pos.Y, to_pos.Z) - dest_step * size.Y; s32 i_src = src_area.index(from_pos.X, from_pos.Y, from_pos.Z); s32 i_local = m_area.index(to_pos.X, to_pos.Y, to_pos.Z); for (s16 z = 0; z < size.Z; z++) { for (s16 y = 0; y < size.Y; y++) { memcpy(&m_data[i_local], &src[i_src], size.X * sizeof(*m_data)); memset(&m_flags[i_local], 0, size.X); i_src += src_step; i_local += dest_step; } i_local += dest_mod; } }