public GpuSpaceBufferContext(uint buffer, DiscreteBounds bounds)
{
CUDAInterop.cuGLRegisterBufferObject(buffer);
_buffer = buffer;
_devicePointer = new deviceptr <VoxelFace>(GetDevicePointer());
_bounds = bounds;
}
//[/LockPositions]
public SimWindow() : base(800, 600, GraphicsMode.Default, "Gravitational n-body simulation")
{
_numBodies = 256 * 64;
const float clusterScale = 1.0f;
const float velocityScale = 1.0f;
_deltaTime = 0.001f;
_softeningSquared = 0.00125f;
_damping = 0.9995f;
//[CreateWorker]
_worker = Worker.CreateByFunc(Generate);
//[/CreateWorker]
_stopwatch = Stopwatch.StartNew();
_fpsCalcLag = 128;
_frameCounter = 0;
//[CreateSimulatros]
_simulators = new Queue <ISimulator>();
var target = GPUModuleTarget.Worker(_worker);
var simulatorGpuDynamicBlockSizeModule = new GpuDynamicSimulatorModule(target); // need dispose
var simulatorGpuDynamicBlockSize64 = simulatorGpuDynamicBlockSizeModule.Create(64);
var simulatorGpuDynamicBlockSize128 = simulatorGpuDynamicBlockSizeModule.Create(128);
var simulatorGpuDynamicBlockSize256 = simulatorGpuDynamicBlockSizeModule.Create(256);
var simulatorGpuDynamicBlockSize512 = simulatorGpuDynamicBlockSizeModule.Create(512);
var simulatorGpuStaticBlockSizeModule64 = new GpuStaticSimulatorModule64(target); // need dispose
var simulatorGpuStaticBlockSizeModule128 = new GpuStaticSimulatorModule128(target); // need dispose
var simulatorGpuStaticBlockSizeModule256 = new GpuStaticSimulatorModule256(target); // need dispose
var simulatorGpuStaticBlockSizeModule512 = new GpuStaticSimulatorModule512(target); // need dispose
// First, enquene one simulator which is 256 blocksize so we can compare with C code for performance.
_simulators.Enqueue(simulatorGpuStaticBlockSizeModule256);
// Enqueue several dynamic block size simulators.
_simulators.Enqueue(simulatorGpuDynamicBlockSize64);
_simulators.Enqueue(simulatorGpuDynamicBlockSize128);
_simulators.Enqueue(simulatorGpuDynamicBlockSize256);
_simulators.Enqueue(simulatorGpuDynamicBlockSize512);
// Enqueue several static block size simulators.
_simulators.Enqueue(simulatorGpuStaticBlockSizeModule64);
_simulators.Enqueue(simulatorGpuStaticBlockSizeModule128);
_simulators.Enqueue(simulatorGpuStaticBlockSizeModule256);
_simulators.Enqueue(simulatorGpuStaticBlockSizeModule512);
// We do not enqueue any cpu simulator as it is much too slow.
//_simulators.Enqueue(new CpuSimulator(_worker, _numBodies));
_disposeSimulators = () =>
{
simulatorGpuDynamicBlockSizeModule.Dispose();
simulatorGpuStaticBlockSizeModule64.Dispose();
simulatorGpuStaticBlockSizeModule128.Dispose();
simulatorGpuStaticBlockSizeModule256.Dispose();
simulatorGpuStaticBlockSizeModule512.Dispose();
};
_simulator = _simulators.Dequeue();
//[/CreateSimulatros]
//[CreateBuffers]
_buffers = new uint[2];
for (var i = 0; i < _buffers.Length; i++)
{
_buffers[i] = 0;
}
GL.GenBuffers(_buffers.Length, _buffers);
foreach (var buffer in _buffers)
{
GL.BindBuffer(BufferTarget.ArrayBuffer, buffer);
GL.BufferData(BufferTarget.ArrayBuffer,
(IntPtr)(Microsoft.FSharp.Core.Operators.SizeOf <float4>() * _numBodies),
IntPtr.Zero, BufferUsageHint.DynamicDraw);
var size = 0;
unsafe
{
GL.GetBufferParameter(BufferTarget.ArrayBuffer, BufferParameterName.BufferSize, &size);
}
if (size != Microsoft.FSharp.Core.Operators.SizeOf <float4>() * _numBodies)
{
throw new Exception("Pixel Buffer Object allocation failed!");
}
GL.BindBuffer(BufferTarget.ArrayBuffer, 0);
CUDAInterop.cuSafeCall(CUDAInterop.cuGLRegisterBufferObject(buffer));
}
_resources = new IntPtr[_buffers.Length];
for (var i = 0; i < _buffers.Length; i++)
{
var res = IntPtr.Zero;
unsafe
{
CUDAInterop.cuSafeCall(CUDAInterop.cuGraphicsGLRegisterBuffer(&res, _buffers[i], 0u));
}
_resources[i] = res;
}
//[/CreateBuffers]
//[FinalizeGL]
_vel = _worker.Malloc <float4>(_numBodies);
float4[] hpos, hvel;
BodyInitializer.Initialize(new BodyInitializer3(), clusterScale, velocityScale, _numBodies,
out hpos, out hvel);
_worker.Scatter(hvel, _vel.Ptr, Microsoft.FSharp.Core.FSharpOption <int> .None,
Microsoft.FSharp.Core.FSharpOption <int> .None);
LockPos(
(pos0, pos1) =>
_worker.Scatter(hpos, pos1, Microsoft.FSharp.Core.FSharpOption <int> .None,
Microsoft.FSharp.Core.FSharpOption <int> .None));
Help();
Description();
//[/FinalizeGL]
}