private async Task TwoPhaseDraw(World world, Tuple <int, int>[] regions, WritableTexture screen)
{
_firstPhaseScreen.Clear();
_faceDrawer.Init(RenderMode.Fill);
var firstPhaseTasks = regions.Select(
region =>
new Task(
() =>
Draw(_firstPhaseScreen, world.WorldObject.FirstPhaseShaderFactory, _faceDrawer, region.Item1,
region.Item2, world)))
.ToArray();
foreach (var task in firstPhaseTasks)
{
task.Start();
}
await Task.WhenAll(firstPhaseTasks).ConfigureAwait(false);
_faceDrawer.Init(world.RenderMode);
var secondPhaseTasks = regions.Select(
region =>
new Task(() =>
{
var shaderState = new ShaderState(30, world);
var shader = world.WorldObject.ShaderFactory();
shader.World(world, _firstPhaseScreen);
for (var i = 0; i < world.WorldObject.Model.Geometry.Faces.Count; i++)
{
_faceDrawer.Draw(i, screen, shader, shaderState, region.Item1, region.Item2);
}
}))
.ToArray();
foreach (var task in secondPhaseTasks)
{
task.Start();
}
await Task.WhenAll(secondPhaseTasks).ConfigureAwait(false);
}
public void Render(World world, Bitmap bitmap)
{
using (var screen = new WritableTexture(bitmap, false))
{
screen.Clear();
var parCount = Environment.ProcessorCount;
var vertStep = _height / parCount - 1;
var start = 0;
var regions = new Tuple <int, int> [parCount];
for (var i = 0; i < parCount; i++)
{
var end = start + vertStep;
regions[i] = Tuple.Create(start, end);
start = end + 1;
}
var last = parCount - 1;
regions[last] = Tuple.Create(regions[last].Item1, _height - 1);
if (world.TwoPhaseRendering)
{
var task = TwoPhaseDraw(world, regions, screen);
task.Wait();
}
else
{
_faceDrawer.Init(world.RenderMode);
var tasks = regions.Select(
region =>
new Task(() => Draw(screen, world.WorldObject.ShaderFactory, _faceDrawer, region.Item1, region.Item2, world)))
.ToArray();
foreach (var task in tasks)
{
task.Start();
}
Task.WaitAll(tasks);
}
}
}
