private void OnEnable()
{
materials = new Dictionary <MaterialID, MaterialData>(new MaterialIDComparer());
// If the atlas consists of only equally sized tiles, this
// would be very simple to replace with some math.
// GetTileSize(MaterialData) => returns the tile size for a given atlas
// GetTileOffset(MaterialData, tile) => multiplies the tile index by size, modulo
// to width, and return the offset.
// With this, each MaterialData could have an integer to point
// to the tile for each of the sides, with/without bark.
Vector2 tilesize = new Vector2(0.25f, 1f);
Vector2 sideBark = new Vector2(0.00f, 0f);
Vector2 sideWOBark = new Vector2(0.25f, 0f);
Vector2 edgeBark = new Vector2(0.50f, 0f);
Vector2 edgeWOBark = new Vector2(0.75f, 0f);
MaterialData md1 = new MaterialData(UVMapFnID.PROJECTION,
new Vector3(1, 2, 1),
4,
Vector2.zero);
MaterialData.SetTile(md1, 0, sideBark, tilesize);
MaterialData.SetTile(md1, 1, sideWOBark, tilesize);
MaterialData.SetTile(md1, 2, edgeBark, tilesize);
MaterialData.SetTile(md1, 3, edgeWOBark, tilesize);
materials.Add(MaterialID.WOOD, md1);
MaterialData md2 = new MaterialData(UVMapFnID.BARK,
new Vector3(1, 2, 1),
4,
new Vector2(0.0625f, 0f));
MaterialData.SetTile(md2, 0, sideBark, tilesize);
MaterialData.SetTile(md2, 1, sideWOBark, tilesize);
MaterialData.SetTile(md2, 2, edgeBark, tilesize);
MaterialData.SetTile(md2, 3, edgeWOBark, tilesize);
materials.Add(MaterialID.WOOD_BARK, md2);
}