/// <summary>
/// Connect the cell vertex to adjacent non-empty cells.
/// </summary>
private void ConnectCellVertexWithQuad(Int3 cellCoord, int cellFillsMask, FILL_VALUE_TYPE[] cellFillValues)
{
// Add triangles in three dimensions
for (int axis = 0; axis < 3; axis++)
{
// If no intersection along this axis, skip.
if (intersectionAxisLookup[cellFillsMask, axis] == 0)
{
continue;
}
int axis_1 = (axis + 1) % 3;
int axis_2 = (axis + 2) % 3;
var vi0 = GetVertIndexAtCoord(cellCoord);
var vi1 = GetVertIndexAtCoord(cellCoord.Offset(axis_1, -1));
var vi2 = GetVertIndexAtCoord(cellCoord.Offset(axis_1, -1).Offset(axis_2, -1));
var vi3 = GetVertIndexAtCoord(cellCoord.Offset(axis_2, -1));
if (vi0 < 0 || vi1 < 0 || vi2 < 0 || vi3 < 0)
{
continue;
}
// Flip faces based on corner value.
if ((cellFillsMask & 1) == 1)
{
AddQuadToTriangleBuffer(vi0, vi1, vi2, vi3);
}
else
{
AddQuadToTriangleBuffer(vi0, vi3, vi2, vi1);
}
}
}
private void CollectCellMesh(Int3 cellCoord)
{
var cellKey = GetVertDataBufferKey(cellCoord);
if (cellToVertDataLookup.ContainsKey(cellKey))
{
var vertData = cellToVertDataLookup[cellKey];
// Add triangles in three dimensions
for (int axis = 0; axis < 3; axis++)
{
// If no intersection along this axis, skip.
if (intersectionAxisLookup[vertData.cellFillsMask, axis] == 0)
{
continue;
}
int axis_1 = (axis + 1) % 3;
int axis_2 = (axis + 2) % 3;
var vi0 = GetVertIndexAtCoord(cellCoord);
var vi1 = GetVertIndexAtCoord(cellCoord.Offset(axis_1, -1));
var vi2 = GetVertIndexAtCoord(cellCoord.Offset(axis_1, -1).Offset(axis_2, -1));
var vi3 = GetVertIndexAtCoord(cellCoord.Offset(axis_2, -1));
if (vi0 < 0 || vi1 < 0 || vi2 < 0 || vi3 < 0)
{
continue;
}
// Flip faces based on corner value.
if ((vertData.cellFillsMask & 1) == 1)
{
AddQuadToTriangleBuffer(vi0, vi1, vi2, vi3);
}
else
{
AddQuadToTriangleBuffer(vi0, vi3, vi2, vi1);
}
}
}
}
private void UpdateCellTriangles(Int3 cellCoord, int cellFillsMask, FILL_VALUE_TYPE[] cellFillValues)
{
// Add triangles in three dimensions
for (int axis = 0; axis < 3; axis++)
{
// If no intersection along this axis, skip.
if (intersectionAxisLookup[cellFillsMask, axis] == 0)
{
continue;
}
int axis_1 = (axis + 1) % 3;
int axis_2 = (axis + 2) % 3;
var vi0 = GetVertIndexAtCoord(cellCoord);
var vi1 = GetVertIndexAtCoord(cellCoord.Offset(axis_1, -1));
var vi2 = GetVertIndexAtCoord(cellCoord.Offset(axis_1, -1).Offset(axis_2, -1));
var vi3 = GetVertIndexAtCoord(cellCoord.Offset(axis_2, -1));
if (vi0 < 0 || vi1 < 0 || vi2 < 0 || vi3 < 0)
{
continue;
}
// For old vertices, only add triangles which contain newly created vertices.
if (newlyAddedVertices.Contains(vi0) || newlyAddedVertices.Contains(vi1) ||
newlyAddedVertices.Contains(vi2) || newlyAddedVertices.Contains(vi3))
{
// Flip faces based on corner value.
if ((cellFillsMask & 1) == 1)
{
AddQuadToTriangleBuffer(vi0, vi1, vi2, vi3);
}
else
{
AddQuadToTriangleBuffer(vi0, vi3, vi2, vi1);
}
}
}
}
private Vector3 ComputeCellNormal(Int3 cellCoord, FILL_VALUE_TYPE[] cellFillValues, Vector3 averagedLocalPos)
{
Vector3 normal;
// Smoother normal
normal.x = (GetCellFillsSum(cellCoord.Offset(-1, 0, 0), averagedLocalPos, 0) -
GetCellFillsSum(cellCoord.Offset(1, 0, 0), averagedLocalPos, 0));
normal.y = (GetCellFillsSum(cellCoord.Offset(0, -1, 0), averagedLocalPos, 1) -
GetCellFillsSum(cellCoord.Offset(0, 1, 0), averagedLocalPos, 1));
normal.z = (GetCellFillsSum(cellCoord.Offset(0, 0, -1), averagedLocalPos, 2) -
GetCellFillsSum(cellCoord.Offset(0, 0, 1), averagedLocalPos, 2));
return(normal.normalized);
}
public void GetNearbyTrunksAtPos(Vector3 worldPos, Vector3 distanceLimit, List <VoxelTrunk> trunks)
{
trunks.Clear();
if (ownerEntity == null)
{
trunks.Add(this);
return;
}
var cellCoord = GetCoordByWorldPos(worldPos);
var limit = new Int3(
Mathf.CeilToInt(distanceLimit.x / cellSize.x),
Mathf.CeilToInt(distanceLimit.y / cellSize.y),
Mathf.CeilToInt(distanceLimit.z / cellSize.z)
);
for (int i = -1; i <= 1; i++)
{
for (int j = -1; j <= 1; j++)
{
for (int k = -1; k <= 1; k++)
{
var offset = new Int3(i * limit.x, j * limit.y, k * limit.z);
var nearbyCellCoord = cellCoord + offset;
if (!data.ContainsCell(nearbyCellCoord))
{
var neighbor = ownerEntity.GetTrunk(coordinate.Offset(i, j, k));
if (neighbor && !trunks.Contains(neighbor))
{
trunks.Add(neighbor);
}
}
else if (i == 0 && j == 0 && k == 0)
{
trunks.Add(this);
}
}
}
}
}
public void SetAllDirty()
{
dirtyRegionMin = Int3.Zero;
dirtyRegionMax = dimension.Offset(-1, -1, -1);
}