public void Update(bool parallelUpdate)
{
/*
* if (IntersectionTestsLastFrame > 0)
* Debug.WriteLine("{0} intersection tests last frame", IntersectionTestsLastFrame);
*/
IntersectionTestsLastFrame = 0;
var options = new ParallelOptions();
if (!parallelUpdate)
{
options.MaxDegreeOfParallelism = 1;
}
_ObstructionsByLight.Clear();
#if SDL2
// Parallel is Satan -flibit
foreach (LightSource ls in Environment.LightSources)
{
LineGeneratorContext ctx = new LineGeneratorContext(Environment.Obstructions.Count * 2);
GenerateLinesForLightSource(ref ctx, ls);
lock (_ObstructionsByLight)
{
foreach (var kvp in ctx.Queue)
{
_ObstructionsByLight.Add(kvp.LightSource, kvp.Lines);
}
}
ctx.Dispose();
}
#else
using (var buffer = BufferPool <LightSource> .Allocate(Environment.LightSources.Count)) {
Environment.LightSources.CopyTo(buffer.Data);
Parallel.For(
0, Environment.LightSources.Count,
options,
() => new LineGeneratorContext(Environment.Obstructions.Count * 2),
(idx, pls, ctx) => {
var ls = buffer.Data[idx];
GenerateLinesForLightSource(ref ctx, ls);
return(ctx);
},
(ctx) => {
lock (_ObstructionsByLight)
foreach (var kvp in ctx.Queue)
{
_ObstructionsByLight.Add(kvp.LightSource, kvp.Lines);
}
ctx.Dispose();
}
);
}
#endif
}
private void GenerateLinesForLightSource(ref LineGeneratorContext context, LightSource lightSource)
{
context.LineWriter.CropBounds = lightSource.Bounds;
Environment.EnumerateObstructionLinesInBounds(lightSource.Bounds, context.LineWriter);
context.LineWriter.CropBounds = null;
context.Queue.Add(new LinesForLightSource(lightSource, context.LineWriter));
context.LineWriter.Reset();
}
