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-rw-r--r--src/Entities/Entity.cpp271
1 files changed, 137 insertions, 134 deletions
diff --git a/src/Entities/Entity.cpp b/src/Entities/Entity.cpp
index 1f270cff0..23d981c3d 100644
--- a/src/Entities/Entity.cpp
+++ b/src/Entities/Entity.cpp
@@ -917,6 +917,143 @@ void cEntity::Tick(std::chrono::milliseconds a_Dt, cChunk & a_Chunk)
+class cSolidHitCallbacks :
+ public cLineBlockTracer::cCallbacks
+{
+public:
+
+ cSolidHitCallbacks(cEntity & a_Entity, const Vector3d & a_CBStart, const Vector3d & a_CBEnd, Vector3d & a_CBHitCoords, eBlockFace & a_CBHitBlockFace) :
+ m_HitBlockFace(a_CBHitBlockFace),
+ m_Entity(a_Entity),
+ m_Start(a_CBStart),
+ m_End(a_CBEnd),
+ m_HitCoords(a_CBHitCoords)
+ {
+ }
+
+ eBlockFace & m_HitBlockFace;
+
+private:
+
+ template <typename EachLambdaType>
+ static void ForEachBlockToTest(const cBoundingBox & a_Around, Vector3d a_Direction, EachLambdaType Each)
+ {
+ const auto BoxStart = a_Around.GetMin().Floor();
+ const auto BoxEnd = a_Around.GetMax().Ceil();
+
+ // This checks all blocks within the hitbox. Hopefully we don't have too many Giants.
+
+ for (int i = BoxStart.x; i < BoxEnd.x; i++)
+ {
+ for (int j = BoxStart.y; j < BoxEnd.y; j++)
+ {
+ for (int k = BoxStart.z; k < BoxEnd.z; k++)
+ {
+ Each({ i, j, k });
+ }
+ }
+ }
+ }
+
+ static double CalculateRetardation(const eBlockFace a_EntryFace, const cBoundingBox & a_Intersection, const cBoundingBox & a_Block, const Vector3d a_Direction)
+ {
+ switch (a_EntryFace)
+ {
+ case BLOCK_FACE_NONE: return 0;
+ case BLOCK_FACE_XM: return (a_Intersection.GetMaxX() - a_Block.GetMinX()) / a_Direction.x;
+ case BLOCK_FACE_XP: return (a_Intersection.GetMinX() - a_Block.GetMaxX()) / a_Direction.x;
+ case BLOCK_FACE_YM: return (a_Intersection.GetMaxY() - a_Block.GetMinY()) / a_Direction.y;
+ case BLOCK_FACE_YP: return (a_Intersection.GetMinY() - a_Block.GetMaxY()) / a_Direction.y;
+ case BLOCK_FACE_ZM: return (a_Intersection.GetMaxZ() - a_Block.GetMinZ()) / a_Direction.z;
+ case BLOCK_FACE_ZP: return (a_Intersection.GetMinZ() - a_Block.GetMaxZ()) / a_Direction.z;
+ }
+
+ UNREACHABLE("Unexpected block face during collision test");
+ }
+
+ void TestBoundingBoxCollisionWithEnvironment(const Vector3d a_TraceIntersection)
+ {
+ cBoundingBox Entity(a_TraceIntersection, m_Entity.GetWidth() / 2, m_Entity.GetHeight());
+
+ ASSERT(m_End != m_Start);
+
+ auto Direction = m_End - m_Start;
+ auto Backoff = std::make_pair(0.0, BLOCK_FACE_NONE);
+
+ ForEachBlockToTest(Entity, Direction, [this, &Backoff, &Direction, &Entity](const Vector3i Test)
+ {
+ cChunk * Chunk;
+ Vector3i Relative;
+ if (
+ !m_Entity.GetParentChunk()->GetChunkAndRelByAbsolute(Test, &Chunk, Relative) ||
+ !cBlockInfo::IsSolid(Chunk->GetBlock(Relative))
+ )
+ {
+ return;
+ }
+
+ cBoundingBox Intersection{ Vector3d(), Vector3d() };
+ cBoundingBox Block(Test, Test + Vector3i(1, 1, 1));
+ if (Block.Intersect(Entity, Intersection))
+ {
+ const auto Centre = (Intersection.GetMax() - Intersection.GetMin()) / 2 + Intersection.GetMin();
+ double IgnoredCoefficient;
+ eBlockFace EntryFace;
+
+ VERIFY(Block.CalcLineIntersection(Centre - Direction, Centre + Direction, IgnoredCoefficient, EntryFace));
+
+ Backoff = std::max(
+ Backoff,
+ std::make_pair(CalculateRetardation(EntryFace, Intersection, Block, Direction), EntryFace)
+ );
+ }
+ });
+
+ m_HitCoords = a_TraceIntersection - Direction * Backoff.first;
+ m_HitBlockFace = Backoff.second;
+ }
+
+ virtual void OnNoMoreHits() override
+ {
+ TestBoundingBoxCollisionWithEnvironment(m_End);
+ }
+
+ virtual bool OnNextBlock(Vector3i a_BlockPos, BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta, eBlockFace a_EntryFace) override
+ {
+ // TODO: comment
+ // We hit a solid block, calculate the exact hit coords and abort trace:
+ m_HitBlockFace = a_EntryFace;
+
+ double LineCoeff = 0; // Used to calculate where along the line an intersection with the bounding box occurs
+ eBlockFace Face; // Face hit
+ cBoundingBox bb(a_BlockPos, a_BlockPos + Vector3i(1, 1, 1)); // Bounding box of the block hit
+
+ // First calculate line intersection
+ if (!bb.CalcLineIntersection(m_Start, m_End, LineCoeff, Face))
+ {
+ // Maths rounding errors have caused the calculation to miss the block completely
+ m_HitCoords = m_End;
+ m_HitBlockFace = BLOCK_FACE_NONE;
+ return true;
+ }
+
+ // Check bbox collision, setting final values
+ // Line tracer hit position is used as a starting point:
+ TestBoundingBoxCollisionWithEnvironment(m_Start + (m_End - m_Start) * LineCoeff);
+
+ return m_HitBlockFace != BLOCK_FACE_NONE;
+ }
+
+ cEntity & m_Entity;
+ const Vector3d & m_Start;
+ const Vector3d & m_End;
+ Vector3d & m_HitCoords;
+};
+
+
+
+
+
void cEntity::HandlePhysics(std::chrono::milliseconds a_Dt, cChunk & a_Chunk)
{
int BlockX = POSX_TOINT;
@@ -1041,140 +1178,6 @@ void cEntity::HandlePhysics(std::chrono::milliseconds a_Dt, cChunk & a_Chunk)
NextSpeed += m_WaterSpeed;
- class cSolidHitCallbacks :
- public cLineBlockTracer::cCallbacks
- {
- public:
- cSolidHitCallbacks(cEntity & a_Entity, const Vector3d & a_CBStart, const Vector3d & a_CBEnd, Vector3d & a_CBHitCoords, eBlockFace & a_CBHitBlockFace) :
- m_HitBlockFace(a_CBHitBlockFace),
- m_Entity(a_Entity),
- m_Start(a_CBStart),
- m_End(a_CBEnd),
- m_HitCoords(a_CBHitCoords)
- {
- }
-
- eBlockFace & m_HitBlockFace;
-
- private:
-
- auto GetBlocksToTestAround(const cBoundingBox & a_Around)
- {
- auto bstart = a_Around.GetMin().Floor();
- auto bend = a_Around.GetMax().Floor();
-
- std::unordered_set<Vector3i, VectorHasher<int>> Checks;
-
- // TODO: checks too much, very inefficient
- for (int i = bstart.x; i <= bend.x; i++)
- {
- for (int j = bstart.y; j <= bend.y; j++)
- {
- for (int k = bstart.z; k <= bend.z; k++)
- {
- Checks.emplace(Vector3i(i, j, k));
- }
- }
- }
-
- return Checks;
- }
-
- static double CalculateRetardation(const eBlockFace a_EntryFace, const cBoundingBox & a_Intersection, const cBoundingBox & a_Block, const Vector3d a_Direction)
- {
- switch (a_EntryFace)
- {
- case BLOCK_FACE_NONE: return 0;
- case BLOCK_FACE_XM: return (a_Intersection.GetMaxX() - a_Block.GetMinX()) / a_Direction.x;
- case BLOCK_FACE_XP: return (a_Intersection.GetMinX() - a_Block.GetMaxX()) / a_Direction.x;
- case BLOCK_FACE_YM: return (a_Intersection.GetMaxY() - a_Block.GetMinY()) / a_Direction.y;
- case BLOCK_FACE_YP: return (a_Intersection.GetMinY() - a_Block.GetMaxY()) / a_Direction.y;
- case BLOCK_FACE_ZM: return (a_Intersection.GetMaxZ() - a_Block.GetMinZ()) / a_Direction.z;
- case BLOCK_FACE_ZP: return (a_Intersection.GetMinZ() - a_Block.GetMaxZ()) / a_Direction.z;
- }
- }
-
- void TestBoundingBoxCollisionWithEnvironment(const Vector3d a_TraceIntersection)
- {
- cBoundingBox Entity(a_TraceIntersection, m_Entity.GetWidth() / 2, m_Entity.GetHeight());
- Entity.Expand(0.0, 0.001, 0.0);
-
- ASSERT(m_End != m_Start);
-
- auto Direction = m_End - m_Start;
- auto Backoff = std::make_pair(0.0, BLOCK_FACE_NONE);
-
- for (const auto & Test : GetBlocksToTestAround(Entity))
- {
- cChunk * Chunk;
- Vector3i Relative;
- if (
- !m_Entity.GetParentChunk()->GetChunkAndRelByAbsolute(Test, &Chunk, Relative) ||
- !cBlockInfo::IsSolid(Chunk->GetBlock(Relative))
- )
- {
- continue;
- }
-
- cBoundingBox Intersection{Vector3d(), Vector3d()};
- cBoundingBox Block(Test, Test + Vector3i(1, 1, 1));
- if (Block.Intersect(Entity, Intersection))
- {
- const auto Centre = (Intersection.GetMax() - Intersection.GetMin()) / 2 + Intersection.GetMin();
- double IgnoredCoefficient;
- eBlockFace EntryFace;
-
- VERIFY(Block.CalcLineIntersection(Centre - Direction, Centre + Direction, IgnoredCoefficient, EntryFace));
-
- Backoff = std::max(
- Backoff,
- std::make_pair(CalculateRetardation(EntryFace, Intersection, Block, Direction), EntryFace)
- );
- }
- }
-
- m_HitCoords = a_TraceIntersection - Direction * Backoff.first;
- m_HitBlockFace = Backoff.second;
- }
-
- virtual void OnNoMoreHits() override
- {
- TestBoundingBoxCollisionWithEnvironment(m_End);
- }
-
- virtual bool OnNextBlock(Vector3i a_BlockPos, BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta, eBlockFace a_EntryFace) override
- {
- // TODO: comment
- // We hit a solid block, calculate the exact hit coords and abort trace:
- m_HitBlockFace = a_EntryFace;
-
- double LineCoeff = 0; // Used to calculate where along the line an intersection with the bounding box occurs
- eBlockFace Face; // Face hit
- cBoundingBox bb(a_BlockPos, a_BlockPos + Vector3i(1, 1, 1)); // Bounding box of the block hit
-
- // First calculate line intersection
- if (!bb.CalcLineIntersection(m_Start, m_End, LineCoeff, Face))
- {
- // Maths rounding errors have caused the calculation to miss the block completely
- m_HitCoords = m_End;
- m_HitBlockFace = BLOCK_FACE_NONE;
- return true;
- }
-
- // Check bbox collision, setting final values
- // Line tracer hit position is used as a starting point:
- TestBoundingBoxCollisionWithEnvironment(m_Start + (m_End - m_Start) * LineCoeff);
-
- return m_HitBlockFace != BLOCK_FACE_NONE;
- }
-
- protected:
- cEntity & m_Entity;
- const Vector3d & m_Start;
- const Vector3d & m_End;
- Vector3d & m_HitCoords;
- };
-
// TODO: comment
while ((DtSec > 0.001) && (NextSpeed.SqrLength() > 0.001))
{
generated by cgit v1.2.3 (git 2.25.1) at 2024-10-06 14:28:15 +0200