public TerrainChunk(Vector2 coord, int size, LoDInfo[] detailLevels, Transform parent, Material material)
{
this.detailLevels = detailLevels;
position = coord * size;
Vector3 positionV3 = new Vector3(position.x, 0, position.y);
bounds = new Bounds(position, Vector2.one * size);
meshObject = new GameObject("Terrain Chunk");
meshRenderer = meshObject.AddComponent <MeshRenderer>();
meshRenderer.material = material;
meshFilter = meshObject.AddComponent <MeshFilter>();
meshCollider = meshObject.AddComponent <MeshCollider>();
meshObject.transform.position = positionV3 * mapGenerator.terrainData.uniformScale;
meshObject.transform.parent = parent;
meshObject.transform.localScale = Vector3.one * mapGenerator.terrainData.uniformScale;
SetVisible(false);
lodMeshes = new LoDMesh[detailLevels.Length];
for (int i = 0; i < detailLevels.Length; i++)
{
lodMeshes[i] = new LoDMesh(detailLevels[i].lod, UpdateTerrainChunk);
if (detailLevels[i].useForCollider)
{
collisionLoDMesh = lodMeshes[i];
}
}
mapGenerator.RequestMapData(position, OnMapDataReceived);
}
public void UpdateTerrainChunk()
{
if (mapDataReceived)
{
float viewerDistanceFromNearestEdge = Mathf.Sqrt(bounds.SqrDistance(viewerPosition));
bool visible = viewerDistanceFromNearestEdge <= maxViewDistance;
if (visible)
{
int lodIndex = 0;
for (int i = 0; i < detailLevels.Length - 1; i++)
{
if (viewerDistanceFromNearestEdge > detailLevels[i].visibleDistanceThreshold)
{
lodIndex = i + 1;
}
else
{
break;
}
}
if (lodIndex != previousLoDIndex)
{
LoDMesh lodMesh = lodMeshes[lodIndex];
if (lodMesh.hasMesh)
{
previousLoDIndex = lodIndex;
meshFilter.mesh = lodMesh.mesh;
}
else if (!lodMesh.hasRequestedMesh)
{
lodMesh.RequestMesh(mapData);
}
}
if (lodIndex == 0)
{
if (collisionLoDMesh.hasMesh)
{
meshCollider.sharedMesh = collisionLoDMesh.mesh;
}
else if (!collisionLoDMesh.hasRequestedMesh)
{
collisionLoDMesh.RequestMesh(mapData);
}
}
terrainChunkVisibleLastUpdate.Add(this);
}
SetVisible(visible);
}
}
