/// <summary>
/// Generates pre-grown trees for the world voxel grid.
/// </summary>
private void GenerateTrees()
{
UnityEngine.Random.seed = Settings.Seed;
for (int x = 0; x < WorldVoxels.Instance.Voxels.GetLength(0); ++x)
{
//Plant a tree in this column with a random chance.
if (UnityEngine.Random.value > Settings.TreeChance)
{
continue;
}
//Find the surface height.
int y = (int)(WorldVoxels.Instance.Voxels.GetLength(1) * (1.0f - Settings.Biome_Surface));
UnityEngine.Assertions.Assert.IsTrue(y >= 0 && y < WorldVoxels.Instance.Voxels.GetLength(1));
//If the first estimate is empty space, move downward.
if (WorldVoxels.Instance.Voxels[x, y] == VoxelTypes.Empty)
{
while (y > 0 && WorldVoxels.Instance.Voxels[x, y - 1] == VoxelTypes.Empty)
{
y -= 1;
}
}
//Otherwise, move upward.
else
{
while (y < WorldVoxels.Instance.Voxels.GetLength(1) - 1 &&
WorldVoxels.Instance.Voxels[x, y] != VoxelTypes.Empty)
{
y += 1;
}
}
//Now that we have the surface position, grow a tree there.
Vector2i pos = new Vector2i(x, y);
Tree tree = new Tree(new GrowPattern_Oak(), new GrowData_Oak(pos, VoxelTypes.Tree_Wood));
tree.GrowDat = tree.GrowPattern.Sprout(WorldVoxels.Instance.Voxels, VoxelTypes.Tree_Wood, pos,
new List<Vector2i>());
WorldTrees.Instance.Trees.Add(tree);
int nGrowths = (int)Mathf.Lerp(Settings.TreeMinGrowth, Settings.TreeMaxGrowth,
Mathf.Pow(UnityEngine.Random.value,
Settings.TreeGrowthExponent));
for (int i = 0; i < nGrowths; ++i)
tree.GrowBareBones();
}
}