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author | Tiger Wang <ziwei.tiger@hotmail.co.uk> | 2014-07-22 19:30:31 +0200 |
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committer | Tiger Wang <ziwei.tiger@hotmail.co.uk> | 2014-07-22 19:30:31 +0200 |
commit | 18a0b60c12daec4c04fd3cb9c4422e69de4fcbf2 (patch) | |
tree | 089b3be905aa030367925762c58bd30b08f5f3f6 /src/Tracer.cpp | |
parent | Merge branch 'master' into saplingsandleaves (diff) | |
parent | Updated prefabs to current Gallery content. (diff) | |
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Diffstat (limited to 'src/Tracer.cpp')
-rw-r--r-- | src/Tracer.cpp | 102 |
1 files changed, 51 insertions, 51 deletions
diff --git a/src/Tracer.cpp b/src/Tracer.cpp index fd8a297c0..756147a7b 100644 --- a/src/Tracer.cpp +++ b/src/Tracer.cpp @@ -37,7 +37,7 @@ cTracer::~cTracer() -float cTracer::SigNum( float a_Num ) +float cTracer::SigNum( float a_Num) { if (a_Num < 0.f) return -1.f; if (a_Num > 0.f) return 1.f; @@ -59,7 +59,7 @@ void cTracer::SetValues(const Vector3f & a_Start, const Vector3f & a_Direction) step.z = (int) SigNum(dir.z); // normalize the direction vector - if( dir.SqrLength() > 0.f ) dir.Normalize(); + if (dir.SqrLength() > 0.f) dir.Normalize(); // how far we must move in the ray direction before // we encounter a new voxel in x-direction @@ -192,7 +192,7 @@ bool cTracer::Trace( const Vector3f & a_Start, const Vector3f & a_Direction, int if (step.y > 0.0f) { - if(pos.y >= end1.y) + if (pos.y >= end1.y) { reachedY = true; } @@ -229,7 +229,7 @@ bool cTracer::Trace( const Vector3f & a_Start, const Vector3f & a_Direction, int if ((!a_LineOfSight && cBlockInfo::IsSolid(BlockID)) || (a_LineOfSight && (BlockID != E_BLOCK_AIR) && !IsBlockWater(BlockID))) { BlockHitPosition = pos; - int Normal = GetHitNormal(a_Start, End, pos ); + int Normal = GetHitNormal(a_Start, End, pos); if (Normal > 0) { HitNormal = m_NormalTable[Normal-1]; @@ -271,13 +271,13 @@ int LinesCross(float x0, float y0, float x1, float y1, float x2, float y2, float // Return: 0 = disjoint (no intersection) // 1 = intersection in the unique point *I0 // 2 = the segment lies in the plane -int cTracer::intersect3D_SegmentPlane( const Vector3f & a_Origin, const Vector3f & a_End, const Vector3f & a_PlanePos, const Vector3f & a_PlaneNormal ) +int cTracer::intersect3D_SegmentPlane( const Vector3f & a_Origin, const Vector3f & a_End, const Vector3f & a_PlanePos, const Vector3f & a_PlaneNormal) { Vector3f u = a_End - a_Origin; // a_Ray.P1 - S.P0; Vector3f w = a_Origin - a_PlanePos; // S.P0 - Pn.V0; - float D = a_PlaneNormal.Dot( u ); // dot(Pn.n, u); - float N = -(a_PlaneNormal.Dot( w ) ); // -dot(a_Plane.n, w); + float D = a_PlaneNormal.Dot( u); // dot(Pn.n, u); + float N = -(a_PlaneNormal.Dot( w)); // -dot(a_Plane.n, w); const float EPSILON = 0.0001f; if (fabs(D) < EPSILON) @@ -299,7 +299,7 @@ int cTracer::intersect3D_SegmentPlane( const Vector3f & a_Origin, const Vector3f return 0; // no intersection } - // Vector3f I ( a_Ray->GetOrigin() + sI * u );// S.P0 + sI * u; // compute segment intersect point + // Vector3f I ( a_Ray->GetOrigin() + sI * u);// S.P0 + sI * u; // compute segment intersect point RealHit = a_Origin + u * sI; return 1; } @@ -311,9 +311,9 @@ int cTracer::intersect3D_SegmentPlane( const Vector3f & a_Origin, const Vector3f int cTracer::GetHitNormal(const Vector3f & start, const Vector3f & end, const Vector3i & a_BlockPos) { Vector3i SmallBlockPos = a_BlockPos; - char BlockID = m_World->GetBlock( a_BlockPos.x, a_BlockPos.y, a_BlockPos.z ); + char BlockID = m_World->GetBlock( a_BlockPos.x, a_BlockPos.y, a_BlockPos.z); - if( BlockID == E_BLOCK_AIR || IsBlockWater(BlockID)) + if (BlockID == E_BLOCK_AIR || IsBlockWater(BlockID)) { return 0; } @@ -324,86 +324,86 @@ int cTracer::GetHitNormal(const Vector3f & start, const Vector3f & end, const Ve Vector3f Look = (end - start); Look.Normalize(); - float dot = Look.Dot( Vector3f(-1, 0, 0) ); // first face normal is x -1 + float dot = Look.Dot( Vector3f(-1, 0, 0)); // first face normal is x -1 if (dot < 0) { - int Lines = LinesCross( start.x, start.y, end.x, end.y, BlockPos.x, BlockPos.y, BlockPos.x, BlockPos.y + 1 ); - if(Lines == 1) + int Lines = LinesCross( start.x, start.y, end.x, end.y, BlockPos.x, BlockPos.y, BlockPos.x, BlockPos.y + 1); + if (Lines == 1) { - Lines = LinesCross( start.x, start.z, end.x, end.z, BlockPos.x, BlockPos.z, BlockPos.x, BlockPos.z + 1 ); - if(Lines == 1) + Lines = LinesCross( start.x, start.z, end.x, end.z, BlockPos.x, BlockPos.z, BlockPos.x, BlockPos.z + 1); + if (Lines == 1) { - intersect3D_SegmentPlane( start, end, BlockPos, Vector3f(-1, 0, 0) ); + intersect3D_SegmentPlane( start, end, BlockPos, Vector3f(-1, 0, 0)); return 1; } } } - dot = Look.Dot( Vector3f(0, 0, -1) ); // second face normal is z -1 - if(dot < 0) + dot = Look.Dot( Vector3f(0, 0, -1)); // second face normal is z -1 + if (dot < 0) { - int Lines = LinesCross( start.z, start.y, end.z, end.y, BlockPos.z, BlockPos.y, BlockPos.z, BlockPos.y + 1 ); - if(Lines == 1) + int Lines = LinesCross( start.z, start.y, end.z, end.y, BlockPos.z, BlockPos.y, BlockPos.z, BlockPos.y + 1); + if (Lines == 1) { - Lines = LinesCross( start.z, start.x, end.z, end.x, BlockPos.z, BlockPos.x, BlockPos.z, BlockPos.x + 1 ); - if(Lines == 1) + Lines = LinesCross( start.z, start.x, end.z, end.x, BlockPos.z, BlockPos.x, BlockPos.z, BlockPos.x + 1); + if (Lines == 1) { - intersect3D_SegmentPlane( start, end, BlockPos, Vector3f(0, 0, -1) ); + intersect3D_SegmentPlane( start, end, BlockPos, Vector3f(0, 0, -1)); return 2; } } } - dot = Look.Dot( Vector3f(1, 0, 0) ); // third face normal is x 1 - if(dot < 0) + dot = Look.Dot( Vector3f(1, 0, 0)); // third face normal is x 1 + if (dot < 0) { - int Lines = LinesCross( start.x, start.y, end.x, end.y, BlockPos.x + 1, BlockPos.y, BlockPos.x + 1, BlockPos.y + 1 ); - if(Lines == 1) + int Lines = LinesCross( start.x, start.y, end.x, end.y, BlockPos.x + 1, BlockPos.y, BlockPos.x + 1, BlockPos.y + 1); + if (Lines == 1) { - Lines = LinesCross( start.x, start.z, end.x, end.z, BlockPos.x + 1, BlockPos.z, BlockPos.x + 1, BlockPos.z + 1 ); - if(Lines == 1) + Lines = LinesCross( start.x, start.z, end.x, end.z, BlockPos.x + 1, BlockPos.z, BlockPos.x + 1, BlockPos.z + 1); + if (Lines == 1) { - intersect3D_SegmentPlane( start, end, BlockPos + Vector3f(1, 0, 0), Vector3f(1, 0, 0) ); + intersect3D_SegmentPlane( start, end, BlockPos + Vector3f(1, 0, 0), Vector3f(1, 0, 0)); return 3; } } } - dot = Look.Dot( Vector3f(0, 0, 1) ); // fourth face normal is z 1 - if(dot < 0) + dot = Look.Dot( Vector3f(0, 0, 1)); // fourth face normal is z 1 + if (dot < 0) { - int Lines = LinesCross( start.z, start.y, end.z, end.y, BlockPos.z + 1, BlockPos.y, BlockPos.z + 1, BlockPos.y + 1 ); - if(Lines == 1) + int Lines = LinesCross( start.z, start.y, end.z, end.y, BlockPos.z + 1, BlockPos.y, BlockPos.z + 1, BlockPos.y + 1); + if (Lines == 1) { - Lines = LinesCross( start.z, start.x, end.z, end.x, BlockPos.z + 1, BlockPos.x, BlockPos.z + 1, BlockPos.x + 1 ); - if(Lines == 1) + Lines = LinesCross( start.z, start.x, end.z, end.x, BlockPos.z + 1, BlockPos.x, BlockPos.z + 1, BlockPos.x + 1); + if (Lines == 1) { - intersect3D_SegmentPlane( start, end, BlockPos + Vector3f(0, 0, 1), Vector3f(0, 0, 1) ); + intersect3D_SegmentPlane( start, end, BlockPos + Vector3f(0, 0, 1), Vector3f(0, 0, 1)); return 4; } } } - dot = Look.Dot( Vector3f(0, 1, 0) ); // fifth face normal is y 1 - if(dot < 0) + dot = Look.Dot( Vector3f(0, 1, 0)); // fifth face normal is y 1 + if (dot < 0) { - int Lines = LinesCross( start.y, start.x, end.y, end.x, BlockPos.y + 1, BlockPos.x, BlockPos.y + 1, BlockPos.x + 1 ); - if(Lines == 1) + int Lines = LinesCross( start.y, start.x, end.y, end.x, BlockPos.y + 1, BlockPos.x, BlockPos.y + 1, BlockPos.x + 1); + if (Lines == 1) { - Lines = LinesCross( start.y, start.z, end.y, end.z, BlockPos.y + 1, BlockPos.z, BlockPos.y + 1, BlockPos.z + 1 ); - if(Lines == 1) + Lines = LinesCross( start.y, start.z, end.y, end.z, BlockPos.y + 1, BlockPos.z, BlockPos.y + 1, BlockPos.z + 1); + if (Lines == 1) { - intersect3D_SegmentPlane( start, end, BlockPos + Vector3f(0, 1, 0), Vector3f(0, 1, 0) ); + intersect3D_SegmentPlane( start, end, BlockPos + Vector3f(0, 1, 0), Vector3f(0, 1, 0)); return 5; } } } - dot = Look.Dot( Vector3f(0, -1, 0) ); // sixth face normal is y -1 - if(dot < 0) + dot = Look.Dot( Vector3f(0, -1, 0)); // sixth face normal is y -1 + if (dot < 0) { - int Lines = LinesCross( start.y, start.x, end.y, end.x, BlockPos.y, BlockPos.x, BlockPos.y, BlockPos.x + 1 ); - if(Lines == 1) + int Lines = LinesCross( start.y, start.x, end.y, end.x, BlockPos.y, BlockPos.x, BlockPos.y, BlockPos.x + 1); + if (Lines == 1) { - Lines = LinesCross( start.y, start.z, end.y, end.z, BlockPos.y, BlockPos.z, BlockPos.y, BlockPos.z + 1 ); - if(Lines == 1) + Lines = LinesCross( start.y, start.z, end.y, end.z, BlockPos.y, BlockPos.z, BlockPos.y, BlockPos.z + 1); + if (Lines == 1) { - intersect3D_SegmentPlane( start, end, BlockPos, Vector3f(0, -1, 0) ); + intersect3D_SegmentPlane( start, end, BlockPos, Vector3f(0, -1, 0)); return 6; } } |