public void Execute()
{
// Convert from rect in tilemap space to interior corners in 0-1 range
float xMin = locationRect.xMin / MapsFile.WorldMapTileDim;
float xMax = locationRect.xMax / MapsFile.WorldMapTileDim;
float yMin = locationRect.yMin / MapsFile.WorldMapTileDim;
float yMax = locationRect.yMax / MapsFile.WorldMapTileDim;
// Scale values for converting blend space into 0-1 range
float leftScale = 1 / xMin;
float rightScale = 1 / (1 - xMax);
float topScale = 1 / yMin;
float bottomScale = 1 / (1 - yMax);
// Flatten location area and blend with surrounding heights
float strength = 0;
float targetHeight = avgMaxHeight[avgHeightIdx];
for (int y = 0; y < hDim; y++)
{
float v = (float)y / (float)(hDim - 1);
bool insideY = (v >= yMin && v <= yMax);
for (int x = 0; x < hDim; x++)
{
float u = (float)x / (float)(hDim - 1);
bool insideX = (u >= xMin && u <= xMax);
if (insideX || insideY)
{
if (insideY && u <= xMin)
{
strength = u * leftScale;
}
else if (insideY && u >= xMax)
{
strength = (1 - u) * rightScale;
}
else if (insideX && v <= yMin)
{
strength = v * topScale;
}
else if (insideX && v >= yMax)
{
strength = (1 - v) * bottomScale;
}
}
else
{
float xs = 0, ys = 0;
if (u <= xMin)
{
xs = u * leftScale;
}
else if (u >= xMax)
{
xs = (1 - u) * rightScale;
}
if (v <= yMin)
{
ys = v * topScale;
}
else if (v >= yMax)
{
ys = (1 - v) * bottomScale;
}
strength = TerrainHelper.BilinearInterpolator(0, 0, 0, 1, xs, ys);
}
int idx = JobA.Idx(y, x, hDim);
float height = heightmapData[idx];
if (insideX && insideY)
{
height = targetHeight;
}
else
{
height = Mathf.Lerp(height, targetHeight, strength);
}
heightmapData[idx] = height;
}
}
}
