private static StaticBuffer <ushort> CreateIndexBuffer(GraphicsDevice graphicsDevice, int maxParticles)
{
var uploadBatch = new ResourceUploadBatch(graphicsDevice);
uploadBatch.Begin();
var indices = new ushort[maxParticles * 2 * 3]; // Two triangles per particle.
var indexCounter = 0;
for (ushort i = 0; i < maxParticles * 4; i += 4)
{
indices[indexCounter++] = (ushort)(i + 0);
indices[indexCounter++] = (ushort)(i + 2);
indices[indexCounter++] = (ushort)(i + 1);
indices[indexCounter++] = (ushort)(i + 1);
indices[indexCounter++] = (ushort)(i + 2);
indices[indexCounter++] = (ushort)(i + 3);
}
var result = StaticBuffer.Create(
graphicsDevice,
uploadBatch,
indices);
uploadBatch.End();
return(result);
}
public T Load <T>(
string filePath,
ResourceUploadBatch uploadBatch,
LoadOptions options = null)
where T : class
{
if (_cachedObjects.TryGetValue(filePath, out var asset))
{
return((T)asset);
}
var type = typeof(T);
if (!_contentLoaders.TryGetValue(type, out var contentLoader))
{
throw new Exception($"Could not finder content loader for type '{type.FullName}'");
}
FileSystemEntry entry = null;
foreach (var testFilePath in contentLoader.GetPossibleFilePaths(filePath))
{
entry = _fileSystem.GetFile(testFilePath);
if (entry != null)
{
break;
}
}
if (entry != null)
{
var createdUploadBatch = false;
if (uploadBatch == null)
{
uploadBatch = new ResourceUploadBatch(GraphicsDevice);
uploadBatch.Begin();
createdUploadBatch = true;
}
asset = contentLoader.Load(entry, this, uploadBatch);
if (asset is IDisposable d)
{
AddDisposable(d);
}
if (createdUploadBatch)
{
uploadBatch.End();
}
}
else
{
asset = contentLoader.PlaceholderValue;
}
_cachedObjects.Add(filePath, asset);
return((T)asset);
}
public TextureLoader(GraphicsDevice graphicsDevice)
{
var uploadBatch = new ResourceUploadBatch(graphicsDevice);
uploadBatch.Begin();
PlaceholderValue = AddDisposable(Texture.CreatePlaceholderTexture2D(
graphicsDevice,
uploadBatch));
uploadBatch.End();
}