/// <summary>
/// Generates a base material distribution for the terrain grid.
/// </summary>
public void GenerateMaterialLayer(GridMaterial mat)
{
int s2 = Size * 2;
Materials = new GridMaterial[s2, Size];
for (int i = 1; i < s2; i++)
{
for (int j = 0; j < Size; j++)
{
Materials[i, j] = mat;
}
}
}
/// <summary>
/// Applies a random material distribution to the terrain grid.
/// </summary>
public void ApplyMaterialLayer(GridMaterial mat, float scale, Vector2 seed, float chance)
{
int s2 = Size * 2;
for (int i = 1; i < s2; i++)
{
for (int j = 0; j < Size; j++)
{
GridFace face = new GridFace(i, j);
Vector2 pos = face.ToCartesianCoords2D();
// pos += face.PointsUp() ? new Vector2(0f, 0.333f * 0.866f) : pos += new Vector2(0f, 0.667f * 0.866f);
if (SimplexNoise.Generate(seed.X + pos.X * scale, seed.Y + pos.Y * scale) < chance)
{
Materials[i, j] = mat;
}
}
}
}
/// <summary>
/// Applies a material distribution to the terrain grid, based on height.
/// </summary>
public void ApplyLowMaterialLayer(GridMaterial mat, float scale, Vector2 seed, float clamp, float mul)
{
int s2 = Size * 2;
for (int i = 1; i < s2; i++)
{
for (int j = 0; j < Size; j++)
{
GridFace face = new GridFace(i, j);
double h = 0;
foreach (GridVertex vert in face.Corners())
{
h += HeightMap[vert.U, vert.V];
}
h *= 0.333f;
Vector2 pos = face.ToCartesianCoords2D();
// pos += face.PointsUp() ? new Vector2(0f, 0.333f * 0.866f) : pos += new Vector2(0f, 0.667f * 0.866f);
if ((SimplexNoise.Generate(seed.X + pos.X * scale, seed.Y + pos.Y * scale) - 0.5) * mul + h < clamp)
{
Materials[i, j] = mat;
}
}
}
}