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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/Tracer.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/Tracer.h')
-rw-r--r-- | src/Tracer.h | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/src/Tracer.h b/src/Tracer.h new file mode 100644 index 000000000..6c2ab6792 --- /dev/null +++ b/src/Tracer.h @@ -0,0 +1,82 @@ + +#pragma once + +#include "Vector3i.h" +#include "Vector3f.h" + + + + + +// fwd: +class cWorld; + + + + + +// tolua_begin + +class cTracer +{ +public: + + /// Contains the position of the block that caused the collision + Vector3f BlockHitPosition; + + /// Contains which face was hit + Vector3f HitNormal; + + /// Contains the exact position where a collision occured. (BlockHitPosition + Offset on block) + Vector3f RealHit; + + + cTracer(cWorld * a_World); + ~cTracer(); + + /// Determines if a collision occures along a line. Returns true if a collision occurs. + bool Trace(const Vector3f & a_Start, const Vector3f & a_Direction, int a_Distance) + { + return Trace(a_Start, a_Direction, a_Distance, false); + } + + /// Determines if a collision occures along a line. Returns true if a collision occurs. + /// When a_LineOfSight is true, we don't use the standard collision detection rules. Instead we use + /// the rules for monster vision. E.g. Only water and air do not block vision. + /// a_Distance is the number of iterations (blocks hits) that are tested. + bool Trace(const Vector3f & a_Start, const Vector3f & a_Direction, int a_Distance, bool a_LineOfSight); + +private: + + /// Preps Tracer object for call of Trace function. Only used internally. + void SetValues( const Vector3f & a_Start, const Vector3f & a_Direction ); + + /// Calculates where on the block a collision occured, if it does occur + /// Returns 0 if no intersection occured + /// Returns 1 if an intersection occured at a single point + /// Returns 2 if the line segment lies in the plane being checked + int intersect3D_SegmentPlane( const Vector3f & a_Origin, const Vector3f & a_End, const Vector3f & a_PlanePos, const Vector3f & a_PlaneNormal ); + + /// Determines which face on the block a collision occured, if it does occur + /// Returns 0 if the block is air, water or no collision occured + /// Return 1 through 6 for the following block faces, repectively: -x, -z, x, z, y, -y + int GetHitNormal( const Vector3f & start, const Vector3f & end, const Vector3i & a_BlockPos); + + float SigNum( float a_Num ); + cWorld* m_World; + + Vector3f m_NormalTable[6]; + + Vector3f dir; + Vector3f tDelta; + Vector3i pos; + Vector3i end1; + Vector3i step; + Vector3f tMax; +}; + +// tolua_end + + + + |