/// <summary>
/// Delegates the generation to the underlying view models.
/// Displays the generated content using the unity objects
/// </summary>
/// <param name="finishAction">The action to invoke when the generation is completed.</param>
/// <param name="generationStartAction">The action to invoke when a generation starts.</param>
/// <param name="generationEndAction">The action to invoke when a generation ends.</param>
/// <param name="cancellationToken">The cancellation token, used to cancel the generation.</param>
internal async void GenerateAsync(
Action finishAction,
OnGenerationStart generationStartAction,
OnGenerationEnd generationEndAction,
CancellationToken cancellationToken)
{
Reset();
_finishedGenerations = 0;
_onGenerationStart = generationStartAction;
_onGenerationEnd = generationEndAction;
// Invokes the finish action
void OnGenerationFinish() => finishAction?.Invoke();
// Update the cancellation token of the view models
terrainViewModel.CancelToken = cancellationToken;
cityViewModel.CancelToken = cancellationToken;
try
{
// Generate the terrain
var(terrainMesh, terrainTexture) = await Task.Run(() => terrainViewModel.Generate(), cancellationToken);
if (cancellationToken.IsCancellationRequested || terrainMesh == null || terrainTexture == null)
{
// Either the task was cancelled or a terrain value is null, abort.
OnGenerationFinish();
return;
}
// Update component data
_meshFilter.sharedMesh = terrainMesh;
_meshCollider.sharedMesh = terrainMesh;
_meshRenderer.sharedMaterial.mainTexture = terrainTexture;
// Update the model's terrain data
_model.TerrainTexture = terrainTexture;
_model.TerrainHeightMap = _meshFilter.sharedMesh.HeightMap();
_model.TerrainOffset = _meshFilter.transform.position;
// Generate a city
_model.City = await Task.Run(() => cityViewModel.Generate(), cancellationToken);
}
catch (TaskCanceledException)
{
// A task was canceled, abort
OnGenerationFinish();
return;
}
if (cancellationToken.IsCancellationRequested || _model.City == null)
{
// Either the task was canceled or the city is not valid, abort.
OnGenerationFinish();
return;
}
// Create game objects based on the world data (terrain and city elements)
CreateGameObjects(cancellationToken);
// Invoke the finish action
OnGenerationFinish();
}
