public void CreateTerrain(int allDivisions, float meshSize,
float meshHeight, float scale)
{
/*
* Get corresponding terrain data and set the heights calculated by
* our diamond square algorithm.
*/
TerrainData terrainData = terrain.terrainData;
DiamondSquareAlgorithm.ResultSet resultSet =
DiamondSquareAlgorithm.CreateTerrain(allDivisions, meshSize,
meshHeight);
terrainData.SetHeights(0, 0,
GetHeights(terrainData, resultSet, scale));
}
private float[,] GetHeights(TerrainData terrainData,
DiamondSquareAlgorithm.ResultSet resultSet, float scale)
{
// the height here refers to the length of the terrain
int width = terrainData.heightmapWidth;
int height = terrainData.heightmapHeight;
float[,] heights = new float[width, height];
float lowestPoint = resultSet.allVertices[0].y;
for (int i = 0; i < resultSet.allVertices.Length; i++)
{
if (resultSet.allVertices[i].y < lowestPoint)
{
lowestPoint = resultSet.allVertices[i].y;
}
}
lowestPoint = Mathf.Abs(lowestPoint);
int k = 0;
for (int x = 0; x < width; x++)
{
for (int y = 0; y < height; y++)
{
// 3000 here refers to the terrain height in terrain resolution
// (the distance above the horizon line)
heights[x, y] = (lowestPoint + resultSet.allVertices[k].y) *
scale / 3000;
k++;
}
}
return(heights);
}
