/// <summary>
/// Generates the required atlas information for a tile.
/// </summary>
/// <param name="def">The building definition containing the atlas.</param>
/// <returns>The atlas information used for rendering.</returns>
public static AtlasInfo[] GenerateAtlas(this BuildingDef def)
{
var tileAtlas = def.BlockTileAtlas.items;
int forbidIndex = tileAtlas[0].name.Length - 12, startIndex = forbidIndex - 9,
n = tileAtlas.Length;
var atlasInfo = new AtlasInfo[n];
for (int k = 0; k < n; k++)
{
var atlasEntry = tileAtlas[k];
string name = atlasEntry.name;
string requiredStr = name.Substring(startIndex, 8);
string forbiddenStr = name.Substring(forbidIndex, 8);
atlasInfo[k].requiredConnections = (Bits)Convert.ToInt32(requiredStr, 2);
atlasInfo[k].forbiddenConnections = (Bits)Convert.ToInt32(forbiddenStr, 2);
atlasInfo[k].uvBox = atlasEntry.uvBox;
atlasInfo[k].name = name;
}
return(atlasInfo);
}
/// <summary>
/// Generates the vertices for one tile in the mesh.
/// </summary>
/// <param name="atlasInfo">The texture atlas to use for rendering.</param>
/// <param name="x">The bottom left X coordinate.</param>
/// <param name="y">The bottom left Y coordinate.</param>
/// <param name="connected">The sides which are connected.</param>
/// <param name="color">The tint color to use when rendering.</param>
public static void AddVertexInfo(this AtlasInfo atlasInfo, int x, int y,
Bits connected, Color color)
{
float size = Grid.CellSizeInMeters;
Vector2 botLeft = new Vector2(x, y);
Vector2 topRight = new Vector2(x + size, y + size);
Vector2 uvWX = new Vector2(atlasInfo.uvBox.x, atlasInfo.uvBox.w);
Vector2 uvYZ = new Vector2(atlasInfo.uvBox.z, atlasInfo.uvBox.y);
var vertices = MeshUtil.vertices;
var uvs = MeshUtil.uvs;
var indices = MeshUtil.indices;
var colors = MeshUtil.colours;
if ((connected & Bits.Left) == 0)
{
botLeft.x -= WORLD_TRIM_SIZE;
}
else
{
uvWX.x += TRIM_UV_SIZE.x;
}
if ((connected & Bits.Right) == 0)
{
topRight.x += WORLD_TRIM_SIZE;
}
else
{
uvYZ.x -= TRIM_UV_SIZE.x;
}
if ((connected & Bits.Up) == 0)
{
topRight.y += WORLD_TRIM_SIZE;
}
else
{
uvYZ.y -= TRIM_UV_SIZE.y;
}
if ((connected & Bits.Down) == 0)
{
botLeft.y -= WORLD_TRIM_SIZE;
}
else
{
uvWX.y += TRIM_UV_SIZE.y;
}
int v0 = vertices.Count;
vertices.Add(botLeft);
vertices.Add(new Vector2(topRight.x, botLeft.y));
vertices.Add(topRight);
vertices.Add(new Vector2(botLeft.x, topRight.y));
uvs.Add(uvWX);
uvs.Add(new Vector2(uvYZ.x, uvWX.y));
uvs.Add(uvYZ);
uvs.Add(new Vector2(uvWX.x, uvYZ.y));
indices.Add(v0);
indices.Add(v0 + 1);
indices.Add(v0 + 2);
indices.Add(v0);
indices.Add(v0 + 2);
indices.Add(v0 + 3);
colors.Add(color);
colors.Add(color);
colors.Add(color);
colors.Add(color);
}
