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Implemented the cBlockArea:RelLine() API function.

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git-svn-id: http://mc-server.googlecode.com/svn/trunk@1211 0a769ca7-a7f5-676a-18bf-c427514a06d6
This commit is contained in:
madmaxoft@gmail.com
2013-02-13 19:54:26 +00:00
parent 8b1a8bee34
commit 90cec2146a
3 changed files with 142 additions and 1 deletions
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136
source/BlockArea.cpp
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@@ -727,7 +727,113 @@ void cBlockArea::RelLine(int a_RelX1, int a_RelY1, int a_RelZ1, int a_RelX2, int
NIBBLETYPE a_BlockLight, NIBBLETYPE a_BlockSkyLight
)
{
// TODO
// Bresenham-3D algorithm for drawing lines:
int dx = abs(a_RelX2 - a_RelX1);
int dy = abs(a_RelY2 - a_RelY1);
int dz = abs(a_RelZ2 - a_RelZ1);
int sx = (a_RelX1 < a_RelX2) ? 1 : -1;
int sy = (a_RelY1 < a_RelY2) ? 1 : -1;
int sz = (a_RelZ1 < a_RelZ2) ? 1 : -1;
int err = dx - dz;
if (dx >= std::max(dy, dz)) // x dominant
{
int yd = dy - dx / 2;
int zd = dz - dx / 2;
while (true)
{
RelSetData(a_RelX1, a_RelY1, a_RelZ1, a_DataTypes, a_BlockType, a_BlockMeta, a_BlockLight, a_BlockSkyLight);
if (a_RelX1 == a_RelX2)
{
break;
}
if (yd >= 0) // move along y
{
a_RelY1 += sy;
yd -= dx;
}
if (zd >= 0) // move along z
{
a_RelZ1 += sz;
zd -= dx;
}
// move along x
a_RelX1 += sx;
yd += dy;
zd += dz;
}
}
else if (dy >= std::max(dx, dz)) // y dominant
{
int xd = dx - dy / 2;
int zd = dz - dy / 2;
while (true)
{
RelSetData(a_RelX1, a_RelY1, a_RelZ1, a_DataTypes, a_BlockType, a_BlockMeta, a_BlockLight, a_BlockSkyLight);
if (a_RelY1 == a_RelY2)
{
break;
}
if (xd >= 0) // move along x
{
a_RelX1 += sx;
xd -= dy;
}
if (zd >= 0) // move along z
{
a_RelZ1 += sz;
zd -= dy;
}
// move along y
a_RelY1 += sy;
xd += dx;
zd += dz;
}
}
else
{
// z dominant
ASSERT(dz >= std::max(dx, dy));
int xd = dx - dz / 2;
int yd = dy - dz / 2;
while (true)
{
RelSetData(a_RelX1, a_RelY1, a_RelZ1, a_DataTypes, a_BlockType, a_BlockMeta, a_BlockLight, a_BlockSkyLight);
if (a_RelZ1 == a_RelZ2)
{
break;
}
if (xd >= 0) // move along x
{
a_RelX1 += sx;
xd -= dz;
}
if (yd >= 0) // move along y
{
a_RelY1 += sy;
yd -= dz;
}
// move along z
a_RelZ1 += sz;
xd += dx;
yd += dy;
}
} // if (which dimension is dominant)
}
@@ -1489,3 +1595,31 @@ bool cBlockArea::LoadFromSchematicNBT(cParsedNBT & a_NBT)
void cBlockArea::RelSetData(
int a_RelX, int a_RelY, int a_RelZ,
int a_DataTypes, BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta,
NIBBLETYPE a_BlockLight, NIBBLETYPE a_BlockSkyLight
)
{
int Index = MakeIndex(a_RelX, a_RelY, a_RelZ);
if ((a_DataTypes & baTypes) != 0)
{
m_BlockTypes[Index] = a_BlockType;
}
if ((a_DataTypes & baMetas) != 0)
{
m_BlockMetas[Index] = a_BlockMeta;
}
if ((a_DataTypes & baLight) != 0)
{
m_BlockLight[Index] = a_BlockLight;
}
if ((a_DataTypes & baSkyLight) != 0)
{
m_BlockSkyLight[Index] = a_BlockSkyLight;
}
}