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author | Mattes D <github@xoft.cz> | 2013-11-27 09:23:17 +0100 |
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committer | Mattes D <github@xoft.cz> | 2013-11-27 09:23:17 +0100 |
commit | 49760db89d94ede5d123d927141a6cd60dbaaf07 (patch) | |
tree | 6c6cf99e4cf3128311a93cd187947b502f3732a0 /src/LineBlockTracer.h | |
parent | cWorld::SpawnExperienceOrb() now returns the entity ID of the spawned orb. (diff) | |
parent | Fixed VC2008 compilation, normalized include paths. (diff) | |
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Diffstat (limited to 'src/LineBlockTracer.h')
-rw-r--r-- | src/LineBlockTracer.h | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/src/LineBlockTracer.h b/src/LineBlockTracer.h new file mode 100644 index 000000000..ccbb70ea6 --- /dev/null +++ b/src/LineBlockTracer.h @@ -0,0 +1,87 @@ + +// LineBlockTracer.h + +// Declares the cLineBlockTracer class representing a cBlockTracer that traces along a straight line between two points + + + + + +#pragma once + +#include "BlockTracer.h" + + + + + +// fwd: Chunk.h +class cChunk; + +// fwd: cChunkMap.h +typedef cItemCallback<cChunk> cChunkCallback; + + + + + + +class cLineBlockTracer : + public cBlockTracer, + public cChunkCallback +{ + typedef cBlockTracer super; + +public: + cLineBlockTracer(cWorld & a_World, cCallbacks & a_Callbacks); + + /// Traces one line between Start and End; returns true if the entire line was traced (until OnNoMoreHits()) + bool Trace(double a_StartX, double a_StartY, double a_StartZ, double a_EndX, double a_EndY, double a_EndZ); + + // Utility functions for simple one-line usage: + /// Traces one line between Start and End; returns true if the entire line was traced (until OnNoMoreHits()) + static bool Trace(cWorld & a_World, cCallbacks & a_Callbacks, double a_StartX, double a_StartY, double a_StartZ, double a_EndX, double a_EndY, double a_EndZ); + + /// Traces one line between Start and End; returns true if the entire line was traced (until OnNoMoreHits()) + static bool Trace(cWorld & a_World, cCallbacks & a_Callbacks, const Vector3d & a_Start, const Vector3d & a_End); + +protected: + // The start point of the trace + double m_StartX, m_StartY, m_StartZ; + + // The end point of the trace + double m_EndX, m_EndY, m_EndZ; + + // The difference in coords, End - Start + double m_DiffX, m_DiffY, m_DiffZ; + + // The increment at which the block coords are going from Start to End; either +1 or -1 + int m_DirX, m_DirY, m_DirZ; + + // The current block + int m_CurrentX, m_CurrentY, m_CurrentZ; + + // The face through which the current block has been entered + char m_CurrentFace; + + + /// Adjusts the start point above the world to just at the world's top + void FixStartAboveWorld(void); + + /// Adjusts the start point below the world to just at the world's bottom + void FixStartBelowWorld(void); + + /// Calculates the XZ coords of an intersection with the specified Yconst plane; assumes that such an intersection exists + void CalcXZIntersection(double a_Y, double & a_IntersectX, double & a_IntersectZ); + + /// Moves m_Current to the next block on the line; returns false if no move is possible (reached the end) + bool MoveToNextBlock(void); + + // cChunkCallback overrides: + virtual bool Item(cChunk * a_Chunk) override; +} ; + + + + + |