void GenerateCellsMesh()
{
if (gridPoints == null || gridPoints.Length == 0)
{
gridPoints = new Vector2[200000];
}
int gridPointsCount = 0;
int y0 = (int)((gridRect.yMin + 0.5f) * _gridRows);
int y1 = (int)((gridRect.yMax + 0.5f) * _gridRows);
y0 = Mathf.Clamp(y0, 0, _gridRows - 1);
y1 = Mathf.Clamp(y1, 0, _gridRows - 1);
for (int y = y0; y <= y1; y++)
{
int yy = y * _gridColumns;
int x0 = (int)((gridRect.xMin + 0.5f) * _gridColumns);
int x1 = (int)((gridRect.xMax + 0.5f) * _gridColumns);
for (int x = x0; x <= x1; x++)
{
int wrapX = x;
if (_wrapHorizontally)
{
if (x < 0)
{
wrapX += _gridColumns;
}
else if (x >= gridColumns)
{
wrapX -= gridColumns;
}
}
if (wrapX < 0 || wrapX >= _gridColumns)
{
continue;
}
Cell cell = cells [yy + wrapX];
if (cell != null)
{
if (gridPoints.Length <= gridPointsCount + 12)
{
// Resize and copy elements; similar to C# standard list but we avoid excesive calls when accessing elements
int newSize = gridPoints.Length * 2;
Vector2[] tmp = new Vector2[newSize];
Array.Copy(gridPoints, tmp, gridPointsCount);
gridPoints = tmp;
}
for (int i = 0; i < 6; i++)
{
CellSegment s = cell.segments [i];
if (!s.isRepeated)
{
gridPoints [gridPointsCount++] = s.start;
gridPoints [gridPointsCount++] = s.end;
}
}
}
}
}
int meshGroups = (gridPointsCount / 65000) + 1;
int meshIndex = -1;
if (cellMeshIndices == null || cellMeshIndices.GetUpperBound(0) != meshGroups - 1)
{
cellMeshIndices = new int[meshGroups][];
cellMeshBorders = new Vector3[meshGroups][];
cellUVs = new Vector2[meshGroups][];
}
if (gridPointsCount == 0)
{
cellMeshBorders [0] = new Vector3[0];
cellMeshIndices [0] = new int[0];
cellUVs [0] = new Vector2[0];
}
else
{
for (int k = 0; k < gridPointsCount; k += 65000)
{
int max = Mathf.Min(gridPointsCount - k, 65000);
++meshIndex;
if (cellMeshBorders [meshIndex] == null || cellMeshBorders [0].GetUpperBound(0) != max - 1)
{
cellMeshBorders [meshIndex] = new Vector3[max];
cellMeshIndices [meshIndex] = new int[max];
cellUVs [meshIndex] = new Vector2[max];
}
for (int j = 0; j < max; j++)
{
cellMeshBorders [meshIndex] [j].x = gridPoints [j + k].x;
cellMeshBorders [meshIndex] [j].y = gridPoints [j + k].y;
cellMeshIndices [meshIndex] [j] = j;
cellUVs [meshIndex] [j].x = gridPoints [j + k].x + 0.5f;
cellUVs [meshIndex] [j].y = gridPoints [j + k].y + 0.5f;
}
}
}
refreshMesh = false; // mesh creation finished at this point
}
void CreateCells()
{
int newLength = _gridRows * _gridColumns;
if (cells == null || cells.Length != newLength)
{
cells = new Cell[newLength];
}
if (_cellsCosts == null || _cellsCosts.Length != cells.Length)
{
_cellsCosts = new CellCosts[newLength];
}
lastCellLookupCount = -1;
_cellLastPointerOn = -1;
float qxOffset = _wrapHorizontally ? 0 : 0.25f;
float qx = _gridColumns * 3f / 4f + qxOffset;
float stepX = 1f / qx;
float stepY = 1f / _gridRows;
float halfStepX = stepX * 0.5f;
float centerOffset = halfStepX;
float halfStepY = stepY * 0.5f;
float halfStepX2 = stepX * 0.25f;
int sidesCount = _gridRows * _gridColumns * 6;
if (sides == null || sides.Length < sidesCount)
{
sides = new CellSegment[_gridRows * _gridColumns * 6]; // 0 = left-up, 1 = top, 2 = right-up, 3 = right-down, 4 = down, 5 = left-down
}
Vector2 center, start, end;
int sideIndex = 0;
int cellIndex = 0;
for (int j = 0; j < _gridRows; j++)
{
center.y = (float)j / _gridRows - 0.5f + halfStepY;
for (int k = 0; k < _gridColumns; k++, cellIndex++)
{
center.x = (float)k / qx - 0.5f + centerOffset;
center.x -= k * halfStepX2;
Cell cell = new Cell(j, k, center);
float offsetY = (k % 2 == 0) ? 0 : -halfStepY;
start.x = center.x - halfStepX;
start.y = center.y + offsetY;
end.x = center.x - halfStepX2;
end.y = center.y + halfStepY + offsetY;
CellSegment leftUp;
if (k > 0 && offsetY < 0)
{
// leftUp is right-down edge of (k-1, j) but swapped
leftUp = sides [sideIndex - 3].swapped; // was sides[k - 1, j, 3].swapped;; sideIndex - 3 at this point equals to (k-1, j, 3)
}
else
{
leftUp = new CellSegment(start, end);
}
sides [sideIndex++] = leftUp; // 0
start.x = center.x - halfStepX2;
start.y = center.y + halfStepY + offsetY;
end.x = center.x + halfStepX2;
end.y = center.y + halfStepY + offsetY;
CellSegment top = new CellSegment(start, end);
sides [sideIndex++] = top; // 1
start.x = center.x + halfStepX2;
start.y = center.y + halfStepY + offsetY;
end.x = center.x + halfStepX;
end.y = center.y + offsetY;
CellSegment rightUp = new CellSegment(start, end);
if (_wrapHorizontally && k == _gridColumns - 1)
{
rightUp.isRepeated = true;
}
sides [sideIndex++] = rightUp; // 2
CellSegment rightDown;
if (j > 0 && k < _gridColumns - 1 && offsetY < 0)
{
// rightDown is left-up edge of (k+1, j-1) but swapped
rightDown = sides [sideIndex - _gridColumns * 6 + 3].swapped; // was sides[k + 1, j - 1, 0].swapped
}
else
{
start.x = center.x + halfStepX;
start.y = center.y + offsetY;
end.x = center.x + halfStepX2;
end.y = center.y - halfStepY + offsetY;
rightDown = new CellSegment(start, end);
if (_wrapHorizontally && k == _gridColumns - 1)
{
rightDown.isRepeated = true;
}
}
sides [sideIndex++] = rightDown; // 3
CellSegment bottom;
if (j > 0)
{
// bottom is top edge from (k, j-1) but swapped
bottom = sides [sideIndex - _gridColumns * 6 - 3].swapped; // was sides[k, j - 1, 1].swapped
}
else
{
start.x = center.x + halfStepX2;
start.y = center.y - halfStepY + offsetY;
end.x = center.x - halfStepX2;
end.y = center.y - halfStepY + offsetY;
bottom = new CellSegment(start, end);
}
sides [sideIndex++] = bottom; // 4
CellSegment leftDown;
if (offsetY < 0 && j > 0)
{
// leftDown is right up from (k-1, j-1) but swapped
leftDown = sides [sideIndex - _gridColumns * 6 - 9].swapped; // was sides [k - 1, j - 1, 2].swapped
}
else if (offsetY == 0 && k > 0)
{
// leftDOwn is right up from (k-1, j) but swapped
leftDown = sides [sideIndex - 9].swapped; // was sides [k - 1, j, 2].swapped
}
else
{
start.x = center.x - halfStepX2;
start.y = center.y - halfStepY + offsetY;
end.x = center.x - halfStepX;
end.y = center.y + offsetY;
leftDown = new CellSegment(start, end);
}
sides [sideIndex++] = leftDown; // 5
if (j > 0 || offsetY == 0)
{
cell.center.y += offsetY;
if (j == 1)
{
bottom.isRepeated = false;
}
else if (j == 0)
{
leftDown.isRepeated = false;
}
cell.segments [0] = leftUp;
cell.segments [1] = top;
cell.segments [2] = rightUp;
cell.segments [3] = rightDown;
cell.segments [4] = bottom;
cell.segments [5] = leftDown;
if (_wrapHorizontally && k == _gridColumns - 1)
{
cell.isWrapped = true;
}
cell.rect2D = new Rect(leftUp.start.x, bottom.start.y, rightUp.end.x - leftUp.start.x, top.start.y - bottom.start.y);
cells [cellIndex] = cell;
}
}
}
}
