public float GetHeight(int x, int z)
{
if (x < 0 || x >= HeightMapData.GetLength(0))
{
return(0);
}
else if (z < 0 || z >= HeightMapData.GetLength(1))
{
return(0);
}
else
{
return(HeightMapData[x, z]);
}
}
public float SampleHeight(Vector3 position)
{
float x = ((position.x - OffsetX) * (((float)HeightMapData.GetLength(0) - 1f) / (float)Width));
float z = ((position.z - OffsetZ) * (((float)HeightMapData.GetLength(1) - 1f) / (float)Length));
var hx0z0 = GetHeight(Mathf.FloorToInt(x), Mathf.FloorToInt(z));
var hx1z0 = GetHeight(Mathf.CeilToInt(x), Mathf.FloorToInt(z));
var hx0z1 = GetHeight(Mathf.FloorToInt(x), Mathf.CeilToInt(z));
var hx1z1 = GetHeight(Mathf.CeilToInt(x), Mathf.CeilToInt(z));
if (hx0z0 == hx1z0 && hx1z0 == hx0z1 && hx0z1 == hx1z1)
{
return(((hx0z0) * Height) + OffsetY);
}
var u0v0 = hx0z0 * (Mathf.CeilToInt(x) - x) * (Mathf.CeilToInt(z) - z);
var u1v0 = hx1z0 * (x - Mathf.FloorToInt(x)) * (Mathf.CeilToInt(z) - z);
var u0v1 = hx0z1 * (Mathf.CeilToInt(x) - x) * (z - Mathf.FloorToInt(z));
var u1v1 = hx1z1 * (x - Mathf.FloorToInt(x)) * (z - Mathf.FloorToInt(z));
return(((u0v0 + u1v0 + u0v1 + u1v1) * Height) + OffsetY);
}