public void IsIdempotent()
{
var subject = new Emitter(10, TimeSpan.FromSeconds(1), Profile.Point());
subject.Dispose();
subject.Dispose();
}
public void WhenEnoughHeadroom_IncreasesActiveParticlesCountByReleaseQuantity()
{
var subject = new Emitter(100, TimeSpan.FromSeconds(1), Profile.Point())
{
Parameters = new ReleaseParameters
{
Quantity = 10
}
};
subject.ActiveParticles.Should().Be(0);
subject.Trigger(new Coordinate(0f, 0f));
subject.ActiveParticles.Should().Be(10);
}
public void WhenNoRemainingParticles_DoesNotIncreaseActiveParticlesCount()
{
var subject = new Emitter(10, TimeSpan.FromSeconds(1), Profile.Point())
{
Parameters = new ReleaseParameters
{
Quantity = 10
}
};
subject.Trigger(new Coordinate(0f, 0f));
subject.ActiveParticles.Should().Be(10);
subject.Trigger(new Coordinate(0f, 0f));
subject.ActiveParticles.Should().Be(10);
}
static void Main()
{
var worldSize = new Size2(1024, 768);
var renderSize = new Size2(1920, 1080);
const bool windowed = true;
const int numParticles = 1000000;
const int numEmitters = 5;
const int budget = numParticles / numEmitters;
var form = new RenderForm("Mercury Particle Engine - SharpDX.Direct3D9 Sample")
{
Size = new System.Drawing.Size(renderSize.Width, renderSize.Height)
};
var direct3d = new Direct3D();
var device = new Device(direct3d, 0, DeviceType.Hardware, form.Handle, CreateFlags.HardwareVertexProcessing, new PresentParameters(renderSize.Width, renderSize.Height) { PresentationInterval = PresentInterval.Immediate, Windowed = windowed });
var view = new Matrix(
1.0f, 0.0f, 0.0f, 0.0f,
0.0f, -1.0f, 0.0f, 0.0f,
0.0f, 0.0f, -1.0f, 0.0f,
0.0f, 0.0f, 0.0f, 1.0f);
var proj = Matrix.OrthoOffCenterLH(worldSize.Width * -0.5f, worldSize.Width * 0.5f, worldSize.Height * 0.5f, worldSize.Height * -0.5f, 0f, 1f);
var wvp = Matrix.Identity * view * proj;
var emitters = new Emitter[numEmitters];
for (int i = 0; i < numEmitters; i++)
{
emitters[i] = new Emitter(budget, TimeSpan.FromSeconds(600), Profile.BoxFill(worldSize.Width, worldSize.Height))
{
Parameters = new ReleaseParameters
{
Colour = new Colour(220f, 0.7f, 0.1f),
Opacity = 1f,
Quantity = budget,
Speed = 0f,
Scale = 1f,
Rotation = 0f,
Mass = new RangeF(8f, 12f)
},
BlendMode = BlendMode.Add,
ReclaimInterval = 600f
};
emitters[i].Modifiers.Add(new DragModifier
{
DragCoefficient = .47f,
Density = .15f
}, 15f);
emitters[i].Modifiers.Add(new VortexModifier
{
Position = Coordinate.Origin,
Mass = 200f,
MaxSpeed = 1000f
}, 30f);
emitters[i].Modifiers.Add(new VelocityHueModifier
{
StationaryHue = 220f,
VelocityHue = 300f,
VelocityThreshold = 800f
}, 15f);
emitters[i].Modifiers.Add(new ContainerModifier
{
RestitutionCoefficient = 0.75f,
Position = Coordinate.Origin,
Width = worldSize.Width,
Height = worldSize.Height
}, 30f);
emitters[i].Modifiers.Add(new MoveModifier(), 60f);
};
var renderer = new PointSpriteRenderer(device, budget)
{
// EnableFastFade = true
};
var texture = Texture.FromFile(device, "Pixel.dds");
var fontDescription = new FontDescription
{
Height = 16,
FaceName = "Consolas",
PitchAndFamily = FontPitchAndFamily.Mono,
Quality = FontQuality.Draft
};
var font = new Font(device, fontDescription);
var totalTimer = Stopwatch.StartNew();
var updateTimer = new Stopwatch();
var renderTimer = new Stopwatch();
var totalTime = 0f;
foreach (var emitter in emitters)
{
emitter.Trigger(Coordinate.Origin);
}
float updateTime = 0f;
RenderLoop.Run(form, () =>
{
// ReSharper disable AccessToDisposedClosure
var frameTime = ((float)totalTimer.Elapsed.TotalSeconds) - totalTime;
totalTime = (float)totalTimer.Elapsed.TotalSeconds;
var mousePosition = form.PointToClient(RenderForm.MousePosition);
Task.WaitAll(
Task.Factory.StartNew(() =>
{
var mouseVector = new Vector3(mousePosition.X, mousePosition.Y, 0f);
var unprojected = Vector3.Unproject(mouseVector, 0, 0, renderSize.Width, renderSize.Height, 0f, 1f, wvp);
Parallel.ForEach(emitters, emitter => ((VortexModifier)emitter.Modifiers.ElementAt(1)).Position = new Coordinate(unprojected.X, unprojected.Y));
updateTimer.Restart();
Parallel.ForEach(emitters, emitter => emitter.Update(frameTime));
updateTimer.Stop();
updateTime = (float)updateTimer.Elapsed.TotalSeconds;
_updateTimes.Add(updateTime);
}),
Task.Factory.StartNew(() =>
{
device.Clear(ClearFlags.Target, Color.Black, 1f, 0);
device.BeginScene();
renderTimer.Restart();
for (int i = 0; i < numEmitters; i++)
{
renderer.Render(emitters[i], wvp, texture);
}
renderTimer.Stop();
var renderTime = (float)renderTimer.Elapsed.TotalSeconds;
var totalUpdateTime = 0f;
// foreach (var time in _updateTimes)
// {
// totalUpdateTime += time;
// }
// totalUpdateTime /= _updateTimes.Count;
//
// if(_updateTimes.Count > 100)
// _updateTimes.RemoveAt(0);
font.DrawText(null, String.Format("Time: {0}", totalTimer.Elapsed), 0, 0, Color.White);
font.DrawText(null, String.Format("Particles: {0:n0}", emitters[0].ActiveParticles * numEmitters), 0, 16, Color.White);
font.DrawText(null, String.Format("Update: {0:n4} ({1,8:P2})", updateTime, updateTime / 0.01666666f), 0, 32, Color.White);
font.DrawText(null, String.Format("Render: {0:n4} ({1,8:P2})", renderTime, renderTime / 0.01666666f), 0, 48, Color.White);
device.EndScene();
device.Present();
})
);
if (Keyboard.IsKeyDown(Key.Escape))
Environment.Exit(0);
// ReSharper restore AccessToDisposedClosure
});
form.Dispose();
font.Dispose();
device.Dispose();
direct3d.Dispose();
}
public void WhenThereAreNoActiveParticles_GracefullyDoesNothing()
{
var subject = new Emitter(100, TimeSpan.FromSeconds(1), Profile.Point());
subject.Update(0.5f);
subject.ActiveParticles.Should().Be(0);
}
public void WhenThereAreParticlesToExpire_DoesNotPassExpiredParticlesToModifiers()
{
var subject = new Emitter(100, TimeSpan.FromSeconds(1), Profile.Point())
{
Parameters = new ReleaseParameters
{
Quantity = 1
}
};
subject.Modifiers.Add(new AssertionModifier((particle, i) => particle.Age[i] <= 1f));
subject.Trigger(new Coordinate(0f, 0f));
subject.Update(0.5f);
subject.Trigger(new Coordinate(0f, 0f));
subject.Update(0.5f);
subject.Trigger(new Coordinate(0f, 0f));
subject.Update(0.5f);
}
public void WhenThereAreParticlesToExpire_DecreasesActiveParticleCount()
{
var subject = new Emitter(100, TimeSpan.FromSeconds(1), Profile.Point())
{
Parameters = new ReleaseParameters
{
Quantity = 1
}
};
subject.Trigger(new Coordinate(0f, 0f));
subject.ActiveParticles.Should().Be(1);
subject.Update(2f);
subject.ActiveParticles.Should().Be(0);
}
