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authorMattes D <github@xoft.cz>2017-05-11 14:34:36 +0200
committerworktycho <work.tycho@gmail.com>2017-05-11 14:34:36 +0200
commit2c3c1f15273835923d9bd4950a19ee88a95ee0f4 (patch)
treecda390aa07a202497271439c2b330643074239df /src/LineBlockTracer.h
parentExported cFallingBlock and cExpOrb (#3700) (diff)
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Diffstat (limited to '')
-rw-r--r--src/LineBlockTracer.h33
1 files changed, 32 insertions, 1 deletions
diff --git a/src/LineBlockTracer.h b/src/LineBlockTracer.h
index 37493ce5c..2851cfbd7 100644
--- a/src/LineBlockTracer.h
+++ b/src/LineBlockTracer.h
@@ -33,6 +33,19 @@ class cLineBlockTracer :
typedef cBlockTracer super;
public:
+ enum eLineOfSight
+ {
+ // Bit flags used for LineOfSightTrace's Sight parameter:
+ losAir = 1, // Can see through air
+ losWater = 2, // Can see through water
+ losLava = 4, // Can see through lava
+
+ // Common combinations:
+ losAirWaterLava = losAir | losWater | losLava,
+ losAirWater = losAir | losWater,
+ };
+
+
cLineBlockTracer(cWorld & a_World, cCallbacks & a_Callbacks);
/** Traces one line between Start and End; returns true if the entire line was traced (until OnNoMoreHits()) */
@@ -46,6 +59,24 @@ public:
/** 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);
+ /** Returns true if the two positions are within line of sight (not obscured by blocks).
+ a_Sight specifies which blocks are considered transparent for the trace, is an OR-combination of eLineOfSight constants. */
+ static bool LineOfSightTrace(cWorld & a_World, const Vector3d & a_Start, const Vector3d & a_End, int a_Sight);
+
+ /** Traces until the first solid block is hit (or until end, whichever comes first.
+ If a solid block was hit, returns true and fills a_HitCoords, a_HitBlockCoords and a_HitBlockFace.
+ If a_End is encountered without hitting any solid block, returns false and doesn't touch a_HitCoords, a_HitBlockCoords nor a_HitBlockFace.
+ a_HitCoords is the exact coords of the hit,
+ a_HitBlockCoords are the coords of the solid block that was hit,
+ a_HitBlockFace is the face of the solid block that was hit. */
+ static bool FirstSolidHitTrace(
+ cWorld & a_World,
+ const Vector3d & a_Start, const Vector3d & a_End,
+ Vector3d & a_HitCoords,
+ Vector3i & a_HitBlockCoords,
+ eBlockFace & a_HitBlockFace
+ );
+
protected:
/** The start point of the trace */
double m_StartX, m_StartY, m_StartZ;
@@ -63,7 +94,7 @@ protected:
int m_CurrentX, m_CurrentY, m_CurrentZ;
/** The face through which the current block has been entered */
- char m_CurrentFace;
+ eBlockFace m_CurrentFace;
/** Adjusts the start point above the world to just at the world's top */