private void UpdateVisibleQuadrants()
{
// Find quadrants that have to be visible
List <Quadrant> newActiveQuadrants = new List <Quadrant>();
foreach (Quadrant quadrant in root.FindQuadrantsOfSize(visibleQuadrantScale))
{
if (quadrant.VisibleByMainCam())
{
newActiveQuadrants.Add(quadrant);
}
}
// Deactivate visible quadrants that have to be invisible
for (int i = visibleQuadrants.Count - 1; i >= 0; i--)
{
Quadrant quadrant = visibleQuadrants[i];
if (!newActiveQuadrants.Contains(quadrant))
{
quadrant.SetVisible(false);
TerrainTexture terrainTexture = visibleQuadrantPairs[quadrant];
terrainTexture.Deactivate();
visibleQuadrantPairs.Remove(quadrant);
terrainTexturePool.Add(terrainTexture);
}
}
// Activate new visible quadrants
visibleQuadrants = newActiveQuadrants;
foreach (Quadrant quadrant in visibleQuadrants)
{
if (!visibleQuadrantPairs.ContainsKey(quadrant))
{
quadrant.SetVisible(true);
// Only instantiate a new terrainTexture if the pool is empty
if (terrainTexturePool.Count == 0)
{
terrainTexturePool.Add(Instantiate(terrainPlanePrefab, transform));
}
TerrainTexture terrainTexture = terrainTexturePool[0];
terrainTexturePool.Remove(terrainTexture);
terrainTexture.gameObject.SetActive(true);
terrainTexture.Setup(quadrant, loadType != TerrainLoadType.NONE);
visibleQuadrantPairs.Add(quadrant, terrainTexture);
}
}
}
