public static CellInfo[,,] GenVertices(int resolution, UtilFuncs.Sampler samp)
{
CellInfo[,,] cellInfos = new CellInfo[resolution, resolution, resolution];
for (int x = 0; x < resolution; x++)
{
for (int y = 0; y < resolution; y++)
{
for (int z = 0; z < resolution; z++)
{
//Vector3 p = new Vector3(x, y, z);
byte caseCode = 0;
sbyte[] densities = new sbyte[8];
for (int i = 0; i < 8; i++)
{
Vector3 pos = new Vector3(x, y, z) + DCC.vfoffsets[i];
densities[i] = (sbyte)Mathf.Clamp((samp(pos.x, pos.y, pos.z) * 127f), -127f, 127f); //data[index + inArray[i]];
if (densities[i] < 0)
{
caseCode |= (byte)(1 << i);
}
}
Vector3[] cpositions = new Vector3[4];
Vector3[] cnormals = new Vector3[4];
int edgeCount = 0;
for (int i = 0; i < 12 && edgeCount < 4; i++)
{
byte c1 = (byte)DCC.edgevmap[i][0];
byte c2 = (byte)DCC.edgevmap[i][1];
Vector3 p1 = new Vector3(x, y, z) + DCC.vfoffsets[c1];
Vector3 p2 = new Vector3(x, y, z) + DCC.vfoffsets[c2];
bool m1 = ((caseCode >> c1) & 1) == 1;
bool m2 = ((caseCode >> c2) & 1) == 1;
if (m1 != m2)
{
cpositions[edgeCount] = ApproximateZeroCrossingPosition(p1, p2, samp);
cnormals[edgeCount] = CalculateSurfaceNormal(cpositions[edgeCount], samp);
edgeCount++;
}
}
if (edgeCount == 0)
{
continue;
}
CellInfo cellInfo = new CellInfo();
QEF.QEFSolver qef = new QEF.QEFSolver();
for (int i = 0; i < edgeCount; i++)
{
qef.Add(cpositions[i], cnormals[i]);
}
cellInfo.Position = qef.Solve(0.0001f, 4, 0.0001f);
//drawInfo.index = vertices.Count;
Vector3 max = new Vector3(x, y, z) + Vector3.one;
if (cellInfo.Position.x < x || cellInfo.Position.x > max.x ||
cellInfo.Position.y < y || cellInfo.Position.y > max.y ||
cellInfo.Position.z < z || cellInfo.Position.z > max.z)
{
cellInfo.Position = qef.MassPoint;
}
//vertices.Add(drawInfo.position);
for (int i = 0; i < edgeCount; i++)
{
cellInfo.Normal += cnormals[i];
}
cellInfo.Normal = Vector3.Normalize(cellInfo.Normal); //CalculateSurfaceNormal(drawInfo.position, samp);
//normals.Add(drawInfo.averageNormal);
cellInfo.Corners = caseCode;
cellInfos[x, y, z] = cellInfo;
}
}
}
return(cellInfos);
}
public static void GenIndices(CellInfo[,,] cellInfos, List <int> indices, List <Vector3> vertices, List <Vector3> normals)
{
int resolution = cellInfos.GetLength(0);
for (int x = 0; x < resolution; x++)
{
for (int y = 0; y < resolution; y++)
{
for (int z = 0; z < resolution; z++)
{
if (x == resolution - 1 || y == resolution - 1 || z == resolution - 1)
{
continue;
}
CellInfo cellInfo = cellInfos[x, y, z];
if (cellInfo.Corners == 0)
{
continue;
}
byte caseCode = (byte)cellInfo.Corners;
Vector3 p = new Vector3(x, y, z);
Vector3Int[][] DCEdgeOffsets =
{
new Vector3Int[] { new Vector3Int(0, 0, 1), new Vector3Int(0, 1, 0), new Vector3Int(0, 1, 1) },
new Vector3Int[] { new Vector3Int(0, 0, 1), new Vector3Int(1, 0, 0), new Vector3Int(1, 0, 1) },
new Vector3Int[] { new Vector3Int(0, 1, 0), new Vector3Int(1, 0, 0), new Vector3Int(1, 1, 0) }
};
Vector3Int[] Maxs =
{
new Vector3Int(0, 1, 1), new Vector3Int(1, 0, 1), new Vector3Int(1, 1, 0)
};
CellInfo[] infos = new CellInfo[4];
infos[0] = cellInfo;
//int v0 = drawInfo.index;
for (int edgeNum = 0; edgeNum < 3; edgeNum++)
{
Vector3 max = Maxs[edgeNum];
Vector3Int[] ofs = DCEdgeOffsets[edgeNum];
if (p.x + max.x >= resolution || p.y + max.y >= resolution || p.z + max.z >= resolution)
{
continue;
}
int ei0 = FarEdges[edgeNum, 0];
int ei1 = FarEdges[edgeNum, 1];
bool edge1 = (caseCode & (1 << ei0)) == (1 << ei0);
bool edge2 = (caseCode & (1 << ei1)) == (1 << ei1);
if (edge1 == edge2)
{
continue;
}
for (int v = 0; v < 3; v++)
{
infos[v + 1] = cellInfos[(int)p.x + ofs[v].x, (int)p.y + ofs[v].y, (int)p.z + ofs[v].z];
}
CellInfo[] i1 = { infos[0], infos[1], infos[3] };
CellInfo[] i2 = { infos[0], infos[3], infos[2] };
if (((caseCode >> ei0) & 1) == 1 != (edgeNum == 1))
{
i1[0] = infos[1]; i1[1] = infos[0];
i2[0] = infos[3]; i2[1] = infos[0];
}
for (int i = 0; i < 3; i++)
{
indices.Add(vertices.Count);
vertices.Add(i1[i].Position);
normals.Add(i1[i].Normal);
}
for (int i = 0; i < 3; i++)
{
indices.Add(vertices.Count);
vertices.Add(i2[i].Position);
normals.Add(i2[i].Normal);
}
}
}
}
}
}
