Vector3 GetVertexBlendElevation(GridElevations el, GridDirection direction, GridDirection edge)
{
float delta = GetStraightGrad(el, edge) * GridMetrics.blendFactor / 2;
if (edge == direction.Next()) //fix clockwise direction
{
delta *= -1;
}
return(Vector3.up * GridMetrics.elevationStep * ((float)el[direction] + delta));
}
void CreateCell(int x, int z, int i)
{
Vector3 position;
position.x = x;
position.y = 0f;
position.z = z;
SquareCell cell = cells[i] = Instantiate <SquareCell>(cellPrefab);
cell.transform.localPosition = position;
if (x > 0)
{
cell.SetNeighbor(GridDirection.W, cells[i - 1]);
}
if (z > 0)
{
cell.SetNeighbor(GridDirection.S, cells[i - cellCountX]);
}
if (z > 0 && x > 0)
{
cell.SetNeighbor(GridDirection.SW, cells[i - cellCountX - 1]);
}
if (z > 0 && x < cellCountX - 1)
{
cell.SetNeighbor(GridDirection.SE, cells[i - cellCountX + 1]);
}
cell.coordinates = GridCoordinates.FromOffsetCoordinates(x, z);
if (heightmap == null)
{
cell.GridElevations = GridElevations.GetVertexHeights(position, seed);
}
else
{
cell.GridElevations = GridElevations.GetVertexHeightsFromHeightmap(position, heightmap);
}
// start off with grass everywhere
cell.Tile = gridMaterials[0].GetClone;
if (cell.CentreElevation < 7) // basic treeline cut-off
{
cell.PlantLevel = UnityEngine.Random.Range(0, 100) - 95;
}
AddCellToChunk(x, z, cell);
}
float GetStraightGrad(GridElevations el, GridDirection direction)
{
return((float)el[direction.Previous()] - (float)el[direction.Next()]);
}
Vector3 GetDoubleVertexBlendElevation(GridElevations el, GridDirection direction)
{
float delta = (GetStraightGrad(el, direction.Previous()) - GetStraightGrad(el, direction.Next())) * GridMetrics.blendFactor / 2;
return(Vector3.up * GridMetrics.elevationStep * ((float)el[direction] + delta));
}
