private Vector3 GCSImagePos; /// Geographic coordinate system
public void genHeight()
{
GCS target = new GCS(lon, lat);
data = HeightLoader.getHeight(target, zoom); //lon, lat
m = new Material(Shader.Find("Unlit/Texture"));
if (GetComponent <MeshRenderer>() != null)
{
GetComponent <MeshRenderer>().material = m;
}
data.Apply();
m.SetTexture("_MainTex", data);
TerrainData td = terrain.terrainData;
td.alphamapResolution = 257;
float[,] heights = new float[td.alphamapWidth, td.alphamapHeight];
for (int i = 0; i < td.alphamapWidth; i++)
{
for (int j = 0; j < td.alphamapHeight; j++)
{
Color c = data.GetPixel(i, j);
float r = c.r;
float g = c.g;
float b = c.b;
//if (j % 100 == 0) Debug.Log(r + " " + g + " " + b);
//heights[i, j] = ((r * 256 + g + b / 256) - 32768) * 0.05f;
//if (j % 100 == 0) Debug.Log(heights[i, j]);
heights[j, i] = (r * 256 + g + b / 256) / 256;
/// bad border (?)
if (i == 256)
{
heights[j, i] = heights[j, 255];
}
}
/// bad border (?)
heights[256, i] = heights[255, i];
}
td.SetHeights(0, 0, heights);
terrain.ApplyDelayedHeightmapModification();
GCSImagePos = new Vector3();
updatePointPosition();
}
void updatePointPosition()
{
/// Top left point position of the tile in the world.
GCS tile = HeightLoader.WorldToTilePos(lon, lat, zoom);
/// Get the decimals in the interval [0 - 1)
tile.lon = tile.lon - System.Math.Truncate(tile.lon);
tile.lat = tile.lat - System.Math.Truncate(tile.lat);
/// Terrain coordinates in Unity starts in bottom left, BUT!
/// terrain coordinates in Height map starts in top left
GCSImagePos.x = (float)(tile.lon * 256);
GCSImagePos.z = 256 - (float)(tile.lat * 256); /// so we need to subtract that
/// Coordinates in height map
int xx = (int)(tile.lon * 256);
int zz = 256 - (int)(tile.lat * 256);
/// Update position
GCSImagePos.y = GetComponent <Terrain>().terrainData.GetHeight(xx, zz) + GetComponent <Transform>().position.y;
}
public static USlippyTile GCS2Slippy(GCS p, int _zoom)
{
p = HeightLoader.WorldToTilePos(p.lon, p.lat, _zoom);
return(new USlippyTile((int)System.Math.Floor(p.lon), (int)System.Math.Floor(p.lat), _zoom));
}
