koobas.hobune.stream
Why do I have multiple nav meshes in my scene?
I am generating a city on a grid with x * y amount of tiles. There are 14 different building prefabs, an street in z direction, one street in x direction and a crossroad for when two streets cross.
In the inspector I can set x and y values of how large the grid should be, a gameobject with the city generation script and in that scrip I have a reference to an unbaked navmesh object that I have in the scene.
Once I start the script will first generate a city grid with random buildings, then in the end I run navMeshSurface.BuildNavMesh().
What happens is that the original navmesh is built and is shaped just as I want it however, there are also as many clones of that nav mesh as there are buildings in the scene which seems strange. Why is that?
void Start()
{
mapGrid = new int[mapWidth, mapHeight];
SortBuildingsBySize(); //Sorts the building array to have the shortest building first in case I put new buildings into it
float seed = UnityEngine.Random.Range(0, 100);
GenerateMapData(seed);
}
//Generates a city grid with perlin noise
private void GenerateMapData(float aSeed)
{
float buildingAmount = (float)buildings.Length;
for (int h = 0; h < mapHeight; h++)
{
for (int w = 0; w < mapWidth; w++)
{
mapGrid[w, h] = (int)(Mathf.PerlinNoise(
w / buildingAmount + aSeed,
h / buildingAmount + aSeed
) * buildingAmount);
}
}
BuildStreetsIntoMapData(); //Randomly places streets along x and z axis in the grid
GenerateCity();
}
private void GenerateCity()
{
for (int h = 0; h < mapHeight; h++)
{
for (int w = 0; w < mapWidth; w++)
{
int result = mapGrid[w, h];
Vector3 pos = new Vector3(w * buildingFootprint, 0, h * buildingFootprint);
if(result < -2)
{
createdBuildings.Add(Instantiate(crossRoad, pos, crossRoad.transform.rotation));
}
else if(result < -1)
{
createdBuildings.Add(Instantiate(xStreet, pos, xStreet.transform.rotation));
}
else if (result < 0)
{
createdBuildings.Add(Instantiate(zStreet, pos, zStreet.transform.rotation));
}
else
{
GameObject building = null;
for (int buildingIndex = 0; buildingIndex < buildings.Length; buildingIndex++)
{
if (result < buildingIndex)
{
building = buildings[buildingIndex];
pos.x = w * buildingFootprint;
pos.y = building.transform.position.y;
pos.z = h * buildingFootprint;
buildingIndex = 10000;
}
}
if (building != null)
{
createdBuildings.Add(Instantiate(building, pos, Quaternion.identity));
}
}
}
}
foreach (var building in createdBuildings)
{
building.transform.parent = transform;
}
navMeshSurface.BuildNavMesh(); //Bakes navmesh once all buildings ar in the scene.
}
is posible the nav$$anonymous$$eshSurface.BuildNav$$anonymous$$esh() is inside a for ? so its executed multiple times?
No, it is definitely outside of any loop. I set up a debug log next to the BuildNavmesh call and only get one message.
$$anonymous$$ake sure there is no ahy other thing creating a navmesh. Are you sure you have 0 nav mesh before that line in executed and multiple navmeshes after that line is executed?
