diff options
Diffstat (limited to 'src/LineBlockTracer.cpp')
| -rw-r--r-- | src/LineBlockTracer.cpp | 31 |
1 files changed, 19 insertions, 12 deletions
diff --git a/src/LineBlockTracer.cpp b/src/LineBlockTracer.cpp index e43a79566..587fa0e7c 100644 --- a/src/LineBlockTracer.cpp +++ b/src/LineBlockTracer.cpp @@ -96,17 +96,17 @@ bool cLineBlockTracer::Trace(double a_StartX, double a_StartY, double a_StartZ, m_Callbacks->OnIntoWorld(m_StartX, m_StartY, m_StartZ); } - m_CurrentX = (int)floor(m_StartX); - m_CurrentY = (int)floor(m_StartY); - m_CurrentZ = (int)floor(m_StartZ); + m_CurrentX = FloorC(m_StartX); + m_CurrentY = FloorC(m_StartY); + m_CurrentZ = FloorC(m_StartZ); m_DiffX = m_EndX - m_StartX; m_DiffY = m_EndY - m_StartY; m_DiffZ = m_EndZ - m_StartZ; // The actual trace is handled with ChunkMapCS locked by calling our Item() for the specified chunk - int BlockX = (int)floor(m_StartX); - int BlockZ = (int)floor(m_StartZ); + int BlockX = FloorC(m_StartX); + int BlockZ = FloorC(m_StartZ); int ChunkX, ChunkZ; cChunkDef::BlockToChunk(BlockX, BlockZ, ChunkX, ChunkZ); return m_World->DoWithChunk(ChunkX, ChunkZ, *this); @@ -120,7 +120,7 @@ void cLineBlockTracer::FixStartAboveWorld(void) { // We must set the start Y to less than cChunkDef::Height so that it is considered inside the world later on // Therefore we use an EPS-offset from the height, as small as reasonably possible. - const double Height = (double)cChunkDef::Height - 0.00001; + const double Height = static_cast<double>(cChunkDef::Height) - 0.00001; CalcXZIntersection(Height, m_StartX, m_StartZ); m_StartY = Height; } @@ -154,38 +154,45 @@ bool cLineBlockTracer::MoveToNextBlock(void) { // Find out which of the current block's walls gets hit by the path: static const double EPS = 0.00001; - double Coeff = 1; - enum eDirection + enum { dirNONE, dirX, dirY, dirZ, } Direction = dirNONE; + + // Calculate the next YZ wall hit: + double Coeff = 1; if (std::abs(m_DiffX) > EPS) { double DestX = (m_DirX > 0) ? (m_CurrentX + 1) : m_CurrentX; - Coeff = (DestX - m_StartX) / m_DiffX; - if (Coeff <= 1) + double CoeffX = (DestX - m_StartX) / m_DiffX; + if (CoeffX <= 1) // We need to include equality for the last block in the trace { + Coeff = CoeffX; Direction = dirX; } } + + // If the next XZ wall hit is closer, use it instead: if (std::abs(m_DiffY) > EPS) { double DestY = (m_DirY > 0) ? (m_CurrentY + 1) : m_CurrentY; double CoeffY = (DestY - m_StartY) / m_DiffY; - if (CoeffY < Coeff) + if (CoeffY <= Coeff) // We need to include equality for the last block in the trace { Coeff = CoeffY; Direction = dirY; } } + + // If the next XY wall hit is closer, use it instead: if (std::abs(m_DiffZ) > EPS) { double DestZ = (m_DirZ > 0) ? (m_CurrentZ + 1) : m_CurrentZ; double CoeffZ = (DestZ - m_StartZ) / m_DiffZ; - if (CoeffZ < Coeff) + if (CoeffZ <= Coeff) // We need to include equality for the last block in the trace { Direction = dirZ; } |