void AddColors(SquareCell cell, GridDirection direction)
{
SquareCell prevNeighbor = cell.GetNeighbor(direction.Previous()) ?? cell;
SquareCell neighbor = cell.GetNeighbor(direction) ?? cell;
SquareCell nextNeighbor = cell.GetNeighbor(direction.Next()) ?? cell;
SquareCell next2Neighbor = cell.GetNeighbor(direction.Next2()) ?? cell;
SquareCell next3Neighbor = cell.GetNeighbor(direction.Next3()) ?? cell;
Color previousMix = (GetColor(prevNeighbor, cell) + cell.Color) / 2f;
Color neighborMix = (GetColor(neighbor, cell) + cell.Color + GetColor(prevNeighbor, cell) + GetColor(nextNeighbor, cell)) / 4f;
Color nextMix = (GetColor(nextNeighbor, cell) + cell.Color) / 2f;
Color nextNeighborMix = (GetColor(nextNeighbor, cell) + cell.Color + GetColor(next2Neighbor, cell) + GetColor(next3Neighbor, cell)) / 4f;
Color next2Mix = (GetColor(next3Neighbor, cell) + cell.Color) / 2f;
if (cell.HasRiver)
{
if (cell.HasRiverThroughEdge(direction.Previous()))
{
terrain.AddTriangleColor(cell.Color);
}
if (cell.HasRiverThroughEdge(direction.Next()))
{
terrain.AddTriangleColor(cell.Color);
}
terrain.AddTriangleColor(cell.Color);
terrain.AddTriangleColor(cell.Color);
}
else
{
terrain.AddTriangleColor(cell.Color);
}
if (cell.HasRiverThroughEdge(direction.Next()))
{
terrain.AddQuadColor(cell.Color, nextMix, nextMix, cell.Color);
terrain.AddQuadColor(cell.Color, nextMix, nextMix, cell.Color);
}
else
{
terrain.AddQuadColor(cell.Color, nextMix, nextMix, cell.Color);
} // next Edge
if (cell.HasRiverThroughEdge(direction.Previous()))
{
terrain.AddQuadColor(cell.Color, cell.Color, previousMix, previousMix);
terrain.AddQuadColor(cell.Color, cell.Color, previousMix, previousMix);
}
else
{
terrain.AddQuadColor(cell.Color, cell.Color, previousMix, previousMix);
} // previous Edge
if (cell.HasRiverThroughEdge(direction))
{
}
else
{
terrain.AddQuadColor(cell.Color, previousMix, neighborMix, nextMix);
} // direction Corner
if (cell.HasRiverThroughEdge(direction.Next2()))
{
}
else
{
terrain.AddQuadColor(cell.Color, nextMix, nextNeighborMix, next2Mix);
} // next Corner
}