flewkey
/
cuberite-2a
1
0
Fork 0
Code Releases Activity

Tracer: removed the "start and end in the same block" warning, it is a normal condition. 

git-svn-id: http://mc-server.googlecode.com/svn/trunk@1360 0a769ca7-a7f5-676a-18bf-c427514a06d6
This commit is contained in:
madmaxoft@gmail.com 2013-04-06 16:12:52 +00:00
parent d397dd263f
commit 045021e896
1 changed files with 59 additions and 29 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

88
source/Tracer.cpp
View File

@ -17,8 +17,12 @@
#include <stdlib.h> // abs()
#endif
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);
@ -28,10 +32,18 @@ cTracer::cTracer(cWorld* a_World)
m_NormalTable[5].Set( 0,-1, 0);
}
cTracer::~cTracer()
{
}
float cTracer::SigNum( float a_Num )
{
if (a_Num < 0.f) return -1.f;
@ -39,7 +51,11 @@ float cTracer::SigNum( float a_Num )
return 0.f;
}
void cTracer::SetValues( const Vector3f & a_Start, const Vector3f & a_Direction )
void cTracer::SetValues(const Vector3f & a_Start, const Vector3f & a_Direction)
{
// calculate the direction of the ray (linear algebra)
dir = a_Direction;
@ -55,23 +71,38 @@ void cTracer::SetValues( const Vector3f & a_Start, const Vector3f & a_Direction
// how far we must move in the ray direction before
// we encounter a new voxel in x-direction
// same but y-direction
if( dir.x != 0.f ) tDelta.x = 1/fabs(dir.x);
else tDelta.x = 0;
if( dir.y != 0.f ) tDelta.y = 1/fabs(dir.y);
else tDelta.y = 0;
if( dir.z != 0.f ) tDelta.z = 1/fabs(dir.z);
else tDelta.z = 0;
if (dir.x != 0.f)
{
tDelta.x = 1 / fabs(dir.x);
}
else
{
tDelta.x = 0;
}
if (dir.y != 0.f)
{
tDelta.y = 1 / fabs(dir.y);
}
else
{
tDelta.y = 0;
}
if (dir.z != 0.f)
{
tDelta.z = 1 / fabs(dir.z);
}
else
{
tDelta.z = 0;
}
// start voxel coordinates
// use your
// transformer
// function here
pos.x = (int)floorf(a_Start.x);
pos.y = (int)floorf(a_Start.y);
pos.z = (int)floorf(a_Start.z);
// calculate distance to first intersection in the voxel we start from
if(dir.x < 0)
if (dir.x < 0)
{
tMax.x = ((float)pos.x - a_Start.x) / dir.x;
}
@ -80,7 +111,7 @@ void cTracer::SetValues( const Vector3f & a_Start, const Vector3f & a_Direction
tMax.x = (((float)pos.x + 1) - a_Start.x) / dir.x;
}
if(dir.y < 0)
if (dir.y < 0)
{
tMax.y = ((float)pos.y - a_Start.y) / dir.y;
}
@ -89,7 +120,7 @@ void cTracer::SetValues( const Vector3f & a_Start, const Vector3f & a_Direction
tMax.y = (((float)pos.y + 1) - a_Start.y) / dir.y;
}
if(dir.z < 0)
if (dir.z < 0)
{
tMax.z = ((float)pos.z - a_Start.z) / dir.z;
}
@ -127,24 +158,23 @@ int cTracer::Trace( const Vector3f & a_Start, const Vector3f & a_Direction, int
end1.z = (int)floorf(End.z);
// check if first is occupied
if( pos.Equals( end1 ) )
if (pos.Equals(end1))
{
LOG("WARNING: cTracer: Start and end in same block");
return 0;
}
bool reachedX = false, reachedY = false, reachedZ = false;
int Iterations = 0;
while ( Iterations < a_Distance )
while (Iterations < a_Distance)
{
Iterations++;
if(tMax.x < tMax.y && tMax.x < tMax.z)
if ((tMax.x < tMax.y) && (tMax.x < tMax.z))
{
tMax.x += tDelta.x;
pos.x += step.x;
}
else if(tMax.y < tMax.z)
else if (tMax.y < tMax.z)
{
tMax.y += tDelta.y;
pos.y += step.y;
@ -155,38 +185,38 @@ int cTracer::Trace( const Vector3f & a_Start, const Vector3f & a_Direction, int
pos.z += step.z;
}
if(step.x > 0.0f)
if (step.x > 0.0f)
{
if(pos.x >= end1.x)
if (pos.x >= end1.x)
{
reachedX = true;
}
}
else if(pos.x <= end1.x)
else if (pos.x <= end1.x)
{
reachedX = true;
}
if(step.y > 0.0f)
if (step.y > 0.0f)
{
if(pos.y >= end1.y)
{
reachedY = true;
}
}
else if(pos.y <= end1.y)
else if (pos.y <= end1.y)
{
reachedY = true;
}
if(step.z > 0.0f)
if (step.z > 0.0f)
{
if(pos.z >= end1.z)
if (pos.z >= end1.z)
{
reachedZ = true;
}
}
else if(pos.z <= end1.z)
else if (pos.z <= end1.z)
{
reachedZ = true;
}
@ -196,7 +226,7 @@ int cTracer::Trace( const Vector3f & a_Start, const Vector3f & a_Direction, int
return false;
}
BLOCKTYPE BlockID = m_World->GetBlock( pos.x, pos.y, pos.z );
BLOCKTYPE BlockID = m_World->GetBlock(pos.x, pos.y, pos.z);
// No collision with water ;)
if ((BlockID != E_BLOCK_AIR) || IsBlockWater(BlockID)) // _X 2013_03_29: Why is the IsBlockWater condition here? water equals air?
{