public GameObject CreateMesh(CityModel cityModel, Vector3RD origin)
{
GameObject container = new GameObject();
//Terraindata terrainData = container.AddComponent<Terraindata>();
verts = GetVerts(cityModel, origin);
List <Vector3> newVerts = new List <Vector3>();
triangleLists = GetTriangleLists(cityModel);
Vector2Int textureSize = ObjectIDMapping.GetTextureSize(triangleLists.Count);
Debug.Log(textureSize);
Mesh mesh = new Mesh();
List <int> triangles = new List <int>();
List <string> objectIDs = new List <string>();
List <Vector2> uvs = new List <Vector2>();
List <int> vectorIDs = new List <int>();
List <int> triangleCount = new List <int>();
int objectIDNumber = 0;
int vertexCounter = 0;
foreach (var item in triangleLists)
{
vertexCounter = 0;
Vector2 uv = ObjectIDMapping.GetUV(objectIDNumber, textureSize);
foreach (int vertexIndex in item.Value)
{
newVerts.Add(verts[vertexIndex]);
uvs.Add(uv);
vectorIDs.Add(objectIDNumber);
triangles.Add(newVerts.Count - 1);
vertexCounter++;
}
triangleCount.Add(vertexCounter);
objectIDs.Add(item.Key);
objectIDNumber++;
}
mesh.indexFormat = UnityEngine.Rendering.IndexFormat.UInt32;
mesh.vertices = newVerts.ToArray();
mesh.triangles = triangles.ToArray();
mesh.uv = uvs.ToArray();
//mesh.RecalculateNormals();
//mesh.Optimize();
container.AddComponent <MeshFilter>().mesh = mesh;
ObjectMapping objectMapping = container.AddComponent <ObjectMapping>();
objectMapping.vectorIDs = vectorIDs;
objectMapping.BagID = objectIDs;
objectMapping.TriangleCount = triangleCount;
return(container);
}
/// <summary>
/// Combine all the children of this tile into a single mesh
/// </summary>
/// <param name="buildingTile">Target tile</param>
/// <param name="worldPosition">Original position to move the tile to for previewing it</param>
private void CreateBuildingTile(GameObject buildingTile, Vector3 worldPosition)
{
MeshFilter[] meshFilters = buildingTile.GetComponentsInChildren <MeshFilter>();
CombineInstance[] combine = new CombineInstance[meshFilters.Length];
//Construct the seperate metadata containing the seperation of the buildings
ObjectMappingClass buildingMetaData = ScriptableObject.CreateInstance <ObjectMappingClass>();
buildingMetaData.ids = new List <string>();
foreach (var meshFilter in meshFilters)
{
buildingMetaData.ids.Add(meshFilter.gameObject.name);
}
var textureSize = ObjectIDMapping.GetTextureSize(buildingMetaData.ids.Count);
List <Vector2> allObjectUVs = new List <Vector2>();
List <int> allVectorMapIndices = new List <int>();
buildingMetaData.uvs = allObjectUVs.ToArray();
//Generate the combined tile mesh
buildingTile.transform.position = Vector3.zero;
string assetFileName = unityMeshAssetFolder + buildingTile.name + ".asset";
string assetMetaDataFileName = unityMeshAssetFolder + buildingTile.name + "-data.asset";
var totalVertexCount = 0;
for (int i = 0; i < combine.Length; i++)
{
combine[i].transform = meshFilters[i].transform.localToWorldMatrix;
Mesh buildingMesh = meshFilters[i].sharedMesh;
totalVertexCount += buildingMesh.vertexCount;
//Create UVS
var buildingUV = ObjectIDMapping.GetUV(i, textureSize);
for (int v = 0; v < buildingMesh.vertexCount; v++)
{
//UV count should match vert count
allObjectUVs.Add(buildingUV);
//Create vector map reference for vert
allVectorMapIndices.Add(i);
}
combine[i].mesh = buildingMesh;
meshFilters[i].gameObject.SetActive(false);
}
//Now add all the combined uvs to our metadata
buildingMetaData.uvs = allObjectUVs.ToArray();
buildingMetaData.vectorMap = allVectorMapIndices;
Mesh newCombinedMesh = new Mesh();
if (totalVertexCount > Mathf.Pow(2, 16))
{
newCombinedMesh.indexFormat = UnityEngine.Rendering.IndexFormat.UInt32;
}
if (meshFilters.Length > 0)
{
newCombinedMesh.name = buildingTile.name;
newCombinedMesh.CombineMeshes(combine, true);
newCombinedMesh.RecalculateNormals();
newCombinedMesh.Optimize();
//And clean up memory
for (int i = 0; i < combine.Length; i++)
{
Destroy(meshFilters[i].sharedMesh);
Destroy(meshFilters[i].gameObject);
}
}
if (renderInViewport)
{
buildingTile.AddComponent <MeshFilter>().sharedMesh = newCombinedMesh;
buildingTile.AddComponent <MeshRenderer>().material = DefaultMaterial;
buildingTile.transform.position = worldPosition;
}
else
{
Destroy(buildingTile);
}
#if UNITY_EDITOR
if (generateAssetFiles)
{
AssetDatabase.CreateAsset(newCombinedMesh, assetFileName);
AssetDatabase.CreateAsset(buildingMetaData, assetMetaDataFileName);
AssetDatabase.SaveAssets();
}
#endif
}
