1 files changed, 68 insertions, 52 deletions

diff --git a/src/Tracer.cpp b/src/Tracer.cpp
index e125c6aa4..e604f4a5b 100644
--- a/src/Tracer.cpp
+++ b/src/Tracer.cpp
@@ -14,15 +14,15 @@
 
 
 
-cTracer::cTracer(cWorld * a_World)
-	: m_World(a_World)
+cTracer::cTracer(cWorld * a_World):
+	m_World(a_World)
 {
-	m_NormalTable[0].Set(-1, 0, 0);
-	m_NormalTable[1].Set( 0, 0, -1);
-	m_NormalTable[2].Set( 1, 0, 0);
-	m_NormalTable[3].Set( 0, 0, 1);
-	m_NormalTable[4].Set( 0, 1, 0);
-	m_NormalTable[5].Set( 0, -1, 0);
+	m_NormalTable[0].Set(-1,  0,  0);
+	m_NormalTable[1].Set( 0,  0, -1);
+	m_NormalTable[2].Set( 1,  0,  0);
+	m_NormalTable[3].Set( 0,  0,  1);
+	m_NormalTable[4].Set( 0,  1,  0);
+	m_NormalTable[5].Set( 0, -1,  0);
 }
 
 
@@ -37,10 +37,16 @@ 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;
+	if (a_Num < 0.f)
+	{
+		return -1.f;
+	}
+	if (a_Num > 0.f)
+	{
+		return 1.f;
+	}
 	return 0.f;
 }
 
@@ -59,7 +65,10 @@ 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
@@ -127,7 +136,7 @@ void cTracer::SetValues(const Vector3f & a_Start, const Vector3f & a_Direction)
 
 
 
-bool cTracer::Trace( const Vector3f & a_Start, const Vector3f & a_Direction, int a_Distance, bool a_LineOfSight)
+bool cTracer::Trace(const Vector3f & a_Start, const Vector3f & a_Direction, int a_Distance, bool a_LineOfSight)
 {
 	if ((a_Start.y < 0) || (a_Start.y >= cChunkDef::Height))
 	{
@@ -249,35 +258,42 @@ int LinesCross(float x0, float y0, float x1, float y1, float x2, float y2, float
 {
 	// float linx, liny;
 
-	float d=(x1-x0)*(y3-y2)-(y1-y0)*(x3-x2);
-	if (std::abs(d)<0.001) {return 0;}
-	float AB=((y0-y2)*(x3-x2)-(x0-x2)*(y3-y2))/d;
-	if (AB>=0.0 && AB<=1.0)
+	float d = (x1 - x0) * (y3 - y2) - (y1 - y0) * (x3 - x2);
+	if (std::abs(d) < 0.001)
 	{
-		float CD=((y0-y2)*(x1-x0)-(x0-x2)*(y1-y0))/d;
-		if (CD>=0.0 && CD<=1.0)
+		return 0;
+	}
+
+	float AB = ((y0 - y2) * (x3 - x2) - (x0 - x2) * (y3 - y2)) / d;
+	if ((AB >= 0.0) && (AB <= 1.0))
+	{
+		float CD = ((y0 - y2) * (x1 - x0) - (x0 - x2) * (y1 - y0)) / d;
+		if ((CD >= 0.0) && (CD <= 1.0))
 		{
-			// linx=x0+AB*(x1-x0);
-			// liny=y0+AB*(y1-y0);
+			// linx = x0 + AB * (x1 - x0);
+			// liny = y0 + AB * (y1 - y0);
 			return 1;
 		}
 	}
 	return 0;
 }
 
+
+
+
 // intersect3D_SegmentPlane(): intersect a segment and a plane
 //    Input:  a_Ray = a segment, and a_Plane = a plane = {Point V0; Vector n;}
 //    Output: *I0 = the intersect point (when it exists)
 //    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)
@@ -294,12 +310,12 @@ int cTracer::intersect3D_SegmentPlane( const Vector3f & a_Origin, const Vector3f
 	// they are not parallel
 	// compute intersect param
 	float sI = N / D;
-	if (sI < 0 || sI > 1)
+	if ((sI < 0) || (sI > 1))
 	{
 		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 +327,9 @@ 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 +340,86 @@ 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);
+		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);
+			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
+	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);
+		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);
+			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
+	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);
+		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);
+			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
+	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);
+		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);
+			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
+	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);
+		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);
+			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
+	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);
+		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);
+			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;
 			}
 		}