//x ~ (0, setting.maxX * power(2, subdivision)), z ~ (0, setting.maxZ * power(2, subdivision))
public MPPathNode GetStandablePathNode(int u, int v, ushort refH)
{
float centerx = 0;
float centerz = 0;
int subdivision = setting.subdivision;
QuadTreeLeaf leaf = GetLeaf(u, v, ref centerx, ref centerz, ref subdivision);
if (leaf == null || leaf.Slices == null)
{
return(null);
}
for (uint i = (uint)leaf.Slices.Length - 1; i > 0; --i)
{
ulong currentSlice = leaf.Slices[i];
byte currentf = SliceAccessor.flag(currentSlice);
ushort currentheight = SliceAccessor.heightGrade(currentSlice);
ulong lowerSlice = leaf.Slices[i - 1];
ushort lowerf = SliceAccessor.flag(lowerSlice);
ushort lowerheight = SliceAccessor.heightGrade(lowerSlice);
if ((currentf & SliceAccessor.SliceCeiling) > 0)
{
continue;
}
if (refH >= currentheight ||
((lowerf & SliceAccessor.SliceCeiling) > 0 && refH >= lowerheight))
{//pillar roof
return(MPPathNodePool.Pop(leaf.Header, u, v, i, subdivision, setting.subdivision,
centerx, centerz, currentSlice));
}
}
ulong floorSlice = leaf.Slices[0];
return(MPPathNodePool.Pop(leaf.Header, u, v, 0, subdivision, setting.subdivision,
centerx, centerz, floorSlice));
}
public void GetPathNeighbours(MPPathNode current, int maxX, int maxZ, MPNeigbours neighbours)
{
ulong[] curSlices = HeightSlicePool.GetSlices(current.SliceHeader);
if (curSlices == null)
{
return;
}
//get current ceiling, where I can't go across
ushort maxH = ushort.MaxValue;
if (current.HIdx < curSlices.Length - 1)
{
ulong higherSlice = curSlices[current.HIdx + 1];
ushort higherf = SliceAccessor.flag(higherSlice);
ushort higherheight = SliceAccessor.heightGrade(higherSlice);
if ((higherf & SliceAccessor.SliceCeiling) > 0)
{
maxH = higherheight;
}
}
for (int u = current.BoundaryXMin; u <= current.BoundaryXMax; ++u)
{
if (u < 0 || u >= maxX)
{
continue;
}
if (current.BoundaryZMin >= 0 && current.BoundaryZMin < maxZ)
{
GetPathNeighbour(current.HeightGrade, maxH, u, current.BoundaryZMin, neighbours);
}
if (current.BoundaryZMax >= 0 && current.BoundaryZMax < maxZ)
{
GetPathNeighbour(current.HeightGrade, maxH, u, current.BoundaryZMax, neighbours);
}
}
for (int v = current.BoundaryZMin; v <= current.BoundaryZMax; ++v)
{
if (v < 0 || v >= maxZ)
{
continue;
}
if (current.BoundaryXMin >= 0 && current.BoundaryXMin < maxX)
{
GetPathNeighbour(current.HeightGrade, maxH, current.BoundaryXMin, v, neighbours);
}
if (current.BoundaryXMax >= 0 && current.BoundaryXMax < maxX)
{
GetPathNeighbour(current.HeightGrade, maxH, current.BoundaryXMax, v, neighbours);
}
}
}
//detailed x, z
//dx ~ (0, setting.maxX * power(2, subdivision)), dx ~ (0, setting.maxZ * power(2, subdivision))
public void Reset(uint header, int dx, int dz, uint ih, int sub, int maxSub,
float centerx, float centerz, ulong val)
{
SliceHeader = header;
HIdx = ih;
Subdivision = sub;
X = centerx;
Z = centerz;
HeightGrade = SliceAccessor.heightGrade(val);
Flag = SliceAccessor.flag(val);
mSlopeU = SliceAccessor.slopeUGrade(val) / SliceAccessor.slopeMagnify;
mSlopeV = SliceAccessor.slopeVGrade(val) / SliceAccessor.slopeMagnify;
//boundary
BoundaryXMin = 0;
BoundaryZMin = 0;
int detail = 1 << sub;
if (sub == 0)
{
BoundaryXMin = dx;
BoundaryZMin = dz;
}
else
{
for (int s = maxSub; s >= sub; --s)
{
detail = 1 << s;
int u = dx >> s; // x / power(2, subdivision);
int v = dz >> s;
BoundaryXMin += u * detail;
BoundaryZMin += v * detail;
dx -= u * detail;
dz -= v * detail;
}
}
BoundaryXMax = BoundaryXMin + detail;
BoundaryZMax = BoundaryZMin + detail;
BoundaryXMin -= 1;
BoundaryZMin -= 1;
}
private void GetLeafDisplaySlice(ulong[] slices, float startx, float startz, float sizex, float sizez, int x, int z,
List <DisplaySlice> lSlices)
{
float minx = startx + sizex * x;
float minz = startz + sizez * z;
float maxx = startx + sizex * (x + 1);
float maxz = startz + sizez * (z + 1);
for (int i = 0; i < slices.Length; ++i)
{
ulong rawSlice = slices[i];
DisplaySlice slice = new DisplaySlice();
slice.height = setting.heightValRange[0] +
SliceAccessor.heightGrade(rawSlice) * setting.heightPerGrade;
slice.flag = SliceAccessor.flag(rawSlice);
slice.min = new float[2] {
minx, minz
};
slice.max = new float[2] {
maxx, maxz
};
lSlices.Add(slice);
}
}
private void GetPathNeighbour(ushort curH, ushort maxH, int u, int v, MPNeigbours neighbours)
{
float centerx = 0;
float centerz = 0;
int subdivision = setting.subdivision;
QuadTreeLeaf leaf = GetLeaf(u, v, ref centerx, ref centerz, ref subdivision);
if (leaf == null || leaf.Slices == null)
{
return;
}
//bigger subdivision may has the same slice structure, add only one
if (neighbours.Contains(leaf.Header))
{
return;
}
//each height slice could be a neighbour
if (leaf.Slices.Length == 1)
{
ulong floorSlice = leaf.Slices[0];
ushort height = SliceAccessor.heightGrade(floorSlice);
byte flag = SliceAccessor.flag(floorSlice);
if (CanMove2Neighbour(setting, curH, maxH, height, ushort.MaxValue))
{
neighbours.Add(leaf.Header, u, v, 0, subdivision, setting.subdivision, centerx, centerz, floorSlice);
}
}
else
{
for (uint i = 0; i < leaf.Slices.Length - 1; ++i)
{
ulong currentSlice = leaf.Slices[i];
byte currentf = SliceAccessor.flag(currentSlice);
ushort currentheight = SliceAccessor.heightGrade(currentSlice);
ulong higherSlice = leaf.Slices[i + 1];
byte higherf = SliceAccessor.flag(higherSlice);
ushort higherheight = SliceAccessor.heightGrade(higherSlice);
if (i == leaf.Slices.Length - 2 && (higherf & SliceAccessor.SliceCeiling) == 0)
{//pillar roof
if (CanMove2Neighbour(setting, curH, maxH, higherheight, ushort.MaxValue))
{
neighbours.Add(leaf.Header, u, v, i + 1, subdivision, setting.subdivision,
centerx, centerz, higherSlice);
}
break;
}
if ((currentf & SliceAccessor.SliceCeiling) > 0)
{
continue;
}
ushort currentMaxH = ushort.MaxValue;
if ((higherf & SliceAccessor.SliceCeiling) > 0)
{//check standable
float holeHeight = (higherheight - currentheight) * setting.heightPerGrade;
if (holeHeight < setting.boundHeight)
{
continue;
}
currentMaxH = higherheight;
}
if (CanMove2Neighbour(setting, curH, maxH, currentheight, currentMaxH))
{
neighbours.Add(leaf.Header, u, v, i, subdivision, setting.subdivision,
centerx, centerz, currentSlice);
}
}
}
}
private QuadTreeLeaf Combine(float dx, float dz, float sliceThickness, float slopeErr)
{
if (Children[0] == null || !(Children[0] is QuadTreeLeaf))
{
return(null);
}
QuadTreeLeaf leaf = (QuadTreeLeaf)Children[0];
for (int i = 1; i < Children.Length; ++i)
{
if (Children[i] == null || !(Children[i] is QuadTreeLeaf))
{
return(null);
}
if (!leaf.IsCombinable((QuadTreeLeaf)Children[i]))
{
return(null);
}
}
for (int s = 0; s < leaf.Slices.Length; ++s)
{
ulong leafS = leaf.Slices[s];
byte flag = SliceAccessor.flag(leafS);
//x axis
short slopeU = GetSlope(leafS, ((QuadTreeLeaf)Children[1]).Slices[s], dx, sliceThickness);
short slopeU1 = GetSlope(((QuadTreeLeaf)Children[2]).Slices[s], ((QuadTreeLeaf)Children[3]).Slices[s],
dx, sliceThickness);
if ((slopeU != 0 && slopeU1 != 0 && Math.Abs(slopeU1 - slopeU) > slopeErr * SliceAccessor.slopeMagnify))
{
return(null);
}
slopeU += slopeU1; slopeU /= 2;
//z axis
short slopeV = GetSlope(leafS, ((QuadTreeLeaf)Children[2]).Slices[s], dz, sliceThickness);
short slopeV1 = GetSlope(((QuadTreeLeaf)Children[1]).Slices[s], ((QuadTreeLeaf)Children[3]).Slices[s],
dz, sliceThickness);
if ((slopeV != 0 && slopeV1 != 0 && Math.Abs(slopeV1 - slopeV) > slopeErr * SliceAccessor.slopeMagnify))
{
return(null);
}
slopeV += slopeV1; slopeV /= 2;
ushort updateH = 0;
for (int i = 0; i < Children.Length; ++i)
{
QuadTreeLeaf l = (QuadTreeLeaf)Children[i];
ulong lS = l.Slices[s];
if (leaf.HashVal != l.HashVal)
{
byte f = SliceAccessor.flag(lS);
short sU = SliceAccessor.slopeUGrade(lS);
short sV = SliceAccessor.slopeVGrade(lS);
//floor cant match ceiling
if (flag != f)
{
return(null);
}
//slope error
if ((sU != 0 && Math.Abs(sU - slopeU) > slopeErr * SliceAccessor.slopeMagnify) ||
(sV != 0 && Math.Abs(sV - slopeV) > slopeErr * SliceAccessor.slopeMagnify))
{
return(null);
}
}
updateH += SliceAccessor.heightGrade(lS);
}
updateH >>= 2;//average height
leaf.Slices[s] = SliceAccessor.packVal(updateH, slopeU, slopeV, flag);
}
leaf.RefreshHash();
return(leaf);
}