88 lines
2.3 KiB
C++
88 lines
2.3 KiB
C++
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#pragma once
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// fwd:
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class cWorld;
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// tolua_begin
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class cTracer
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{
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public:
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/** Contains the position of the block that caused the collision */
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Vector3f BlockHitPosition;
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/** Contains which face was hit */
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Vector3f HitNormal;
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/** Contains the exact position where a collision occured. (BlockHitPosition + Offset on block) */
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Vector3f RealHit;
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cTracer(cWorld * a_World);
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~cTracer();
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// tolua_end
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/** Determines if a collision occures along a line. Returns true if a collision occurs.
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Exported manually to add deprecation warnings. */
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bool Trace(const Vector3f & a_Start, const Vector3f & a_Direction, int a_Distance)
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{
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return Trace(a_Start, a_Direction, a_Distance, false);
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}
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/** Determines if a collision occures along a line. Returns true if a collision occurs.
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When a_LineOfSight is true, we don't use the standard collision detection rules. Instead we use
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the rules for monster vision. E.g. Only water and air do not block vision.
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a_Distance is the number of iterations (blocks hits) that are tested.
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Exported manually to add deprecation warnings. */
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bool Trace(const Vector3f & a_Start, const Vector3f & a_Direction, int a_Distance, bool a_LineOfSight);
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// tolua_begin
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private:
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/** Preps Tracer object for call of Trace function. Only used internally. */
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void SetValues(const Vector3f & a_Start, const Vector3f & a_Direction);
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/** Calculates where on the block a collision occured, if it does occur
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Returns 0 if no intersection occured
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Returns 1 if an intersection occured at a single point
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Returns 2 if the line segment lies in the plane being checked */
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int intersect3D_SegmentPlane(const Vector3f & a_Origin, const Vector3f & a_End, const Vector3f & a_PlanePos, const Vector3f & a_PlaneNormal);
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/** Determines which face on the block a collision occured, if it does occur
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Returns 0 if the block is air, water or no collision occured
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Return 1 through 6 for the following block faces, repectively: -x, -z, x, z, y, -y */
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int GetHitNormal(const Vector3f &a_Start, const Vector3f & a_End, const Vector3i & a_BlockPos);
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/** Signum function */
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int SigNum(float a_Num);
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cWorld * m_World;
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static const std::array<const Vector3f, 6> & m_NormalTable(void);
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Vector3f m_Dir;
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Vector3f m_tDelta;
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Vector3i m_Pos;
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Vector3i m_End1;
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Vector3i m_Step;
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Vector3f m_tMax;
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};
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// tolua_end
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