/// <summary>
/// Get the value of the Generator in world space.
/// </summary>
/// <param name="x">X coordinate in resolution</param>
/// <param name="y">Y coordinate in resolution</param>
/// <param name="position">Position in Terra grid units</param>
/// <param name="resolution">Resolution of this Tile being sampled</param>
/// <param name="spread">What to divide the x & y coordinates by before sampling</param>
/// <param name="length">Length of a Tile</param>
public float GetValue(int x, int y, GridPosition position, int resolution, float spread, int length)
{
Vector2 local = TileMesh.PositionToLocal(x, y, resolution);
Vector2 world = TileMesh.LocalToWorld(position, local.x, local.y, length);
return(_generator.GetValue(world.x / spread, world.y / spread, 0f));
}
/// <summary>
/// Get the value of the Generator in world space.
/// </summary>
/// <param name="i">Index of X/Y location in </param>
/// <param name="position">Position in Terra grid units</param>
/// <param name="resolution">Resolution of this Tile being sampled</param>
/// <param name="spread">What to divide the x & y coordinates by before sampling</param>
/// <param name="length">Length of a Tile</param>
public float GetValue(int i, GridPosition position, int resolution, float spread, int length)
{
int x = i % resolution;
int y = i / resolution;
Vector2 local = TileMesh.PositionToLocal(x, y, resolution);
Vector2 world = TileMesh.LocalToWorld(position, local.x, local.y, length);
float value = _generator.GetValue(world.x / spread, world.y / spread, 0f);
return(GetRemappedValue(value));
}
/// <summary>
/// Averages the normals of the passed TileMesh with this TileMesh's ActiveMesh.
/// </summary>
/// <param name="tm">Mesh to average normals with</param>
/// <param name="orientation">Orientation of the passed mesh in relation to this one.</param>
private void AverageNormalsWith(TileMesh tm, Orientation orientation)
{
int res = HeightmapResolution;
int tmRes = tm.HeightmapResolution;
if (tmRes == 0 || res == 0)
{
//One or more of the referenced tiles hasn't been
//generated yet. Skip.
return;
}
bool incrX = false;
int x1Start, x2Start, z1Start, z2Start;
x1Start = x2Start = z1Start = z2Start = 0;
switch (orientation)
{
case Orientation.Up:
z1Start = res - 1;
incrX = true;
break;
case Orientation.Right:
x1Start = res - 1;
break;
case Orientation.Down:
z2Start = tmRes - 1;
incrX = true;
break;
case Orientation.Left:
x2Start = tmRes - 1;
break;
}
Vector3[] norms1 = ActiveMesh.normals;
Vector3[] norms2 = tm.ActiveMesh.normals;
//Since meshes can be different resolutions, x an z
//vector components across both meshes are
//incremented independently
int incrAmt1 = 1;
int incrAmt2 = 1;
if (res > tm.HeightmapResolution)
{
incrAmt1 = res / tm.HeightmapResolution;
}
else
{
incrAmt2 = tm.HeightmapResolution / res;
}
for (int i = 0; i < Math.Min(res, tm.HeightmapResolution); i++)
{
Vector3 average = (norms1[x1Start + z1Start * HeightmapResolution] +
norms2[x2Start + z2Start * tm.HeightmapResolution]) / 2;
average = average.normalized;
norms1[x1Start + z1Start * HeightmapResolution] = average;
norms2[x2Start + z2Start * tm.HeightmapResolution] = average;
if (incrX)
{
x1Start += incrAmt1;
x2Start += incrAmt2;
}
else
{
z1Start += incrAmt1;
z2Start += incrAmt2;
}
}
ActiveMesh.normals = norms1;
tm.ActiveMesh.normals = norms2;
}