/*
private unsafe Mem GetCounter()
{
fixed (ulong* dataptr = &voxelctr)
{
counter = manager.Context.CreateBuffer(MemFlags.READ_WRITE, 8, new IntPtr(dataptr));
}
return counter;
}*/
private unsafe void DoRayCasting(BitmapData output)
{
try
{
int deviceIndex = 0;
outputBuffer = manager.Context.CreateBuffer(MemFlags.USE_HOST_PTR, output.Stride * output.Height, output.Scan0);
if (first || changeDistance)
{
// модель камеры UVN
camPos = new Float4()
{
S0 =
vol.GetSize() / 2 - (float)Math.Cos(camAngle * Math.PI / 180) * camDist,
S1 = vol.GetSize() / 2,
S2 = vol.GetSize() / 2 - (float)Math.Sin(camAngle * Math.PI / 180) * camDist,
S3 = 0
};
first = false;
changeDistance = false;
camPosOld = camPos;
}
else
{
// поворот вокруг оси куба визуализации
if (angleChange && leftChange)
{
camPosOld.S0 -= camLookAt.S0;
camPosOld.S2 -= camLookAt.S2;
camPos.S0 = (float)Math.Cos(camAngle * Math.PI / 180) * camPosOld.S0 + (float)Math.Sin(camAngle * Math.PI / 180) * camPosOld.S2;
camPos.S1 = vol.GetSize() / 2;
camPos.S2 = -(float)Math.Sin(camAngle * Math.PI / 180) * camPosOld.S0 + (float)Math.Cos(camAngle * Math.PI / 180) * camPosOld.S2;
camPos.S3 = 0;
camPos.S0 += camLookAt.S0;
camPos.S2 += camLookAt.S2;
camPosOld = camPos;
angleChange = false;
leftChange = false;
}
if (angleChange && rightChange)
{
camPosOld.S0 -= camLookAt.S0;
camPosOld.S2 -= camLookAt.S2;
camPos.S0 = (float)Math.Cos(camAngle * Math.PI / 180) * camPosOld.S0 - (float)Math.Sin(camAngle * Math.PI / 180) * camPosOld.S2;
camPos.S1 = vol.GetSize() / 2;
camPos.S2 = (float)Math.Sin(camAngle * Math.PI / 180) * camPosOld.S0 + (float)Math.Cos(camAngle * Math.PI / 180) * camPosOld.S2;
camPos.S3 = 0;
camPos.S0 += camLookAt.S0;
camPos.S2 += camLookAt.S2;
camPosOld = camPos;
angleChange = false;
leftChange = false;
}
}
camLookAt = new Float4()
{
S0 = vol.GetSize() / camfactorX,
S1 = vol.GetSize() / camfactorX,
S2 = vol.GetSize() / camfactorZ,
S3 = 0
};
//light = camPos;
// направление камеры, UVN модель
camForward = camLookAt.Sub(camPos).Normalize(); // направление просмотра
var up = new Float4(0.0f, 1.0f, 0.0f, 0.0f);
var right = MathClass.Cross(up, camForward).Normalize().Times(1.5f);
up = MathClass.Cross(camForward, right).Normalize().Times(-1.5f);
/* обработка выходного изображения BitmapData в OpenCl устройстве */
for (var x = 0; x < output.Width; x += blocksize)
{
for (var y = 0; y < output.Height; y += blocksize)
{
var rayTracingGlobalWorkSize = new IntPtr[2]; // work_dim = 2
rayTracingGlobalWorkSize[0] = (IntPtr)(output.Width - x > blocksize ? blocksize : output.Width - x);
rayTracingGlobalWorkSize[1] = (IntPtr)(output.Height - y > blocksize ? blocksize : output.Height - y);
var rayTracingGlobalOffset = new IntPtr[2];
rayTracingGlobalOffset[0] = (IntPtr)x;
rayTracingGlobalOffset[1] = (IntPtr)y;
float ka = (float)(Convert.ToDouble(kamb.Text));
float kd = (float)(Convert.ToDouble(kdiff.Text));
float ks = (float)(Convert.ToDouble(kspec.Text));
float exp = (float)(Convert.ToDouble(specexp.Text));
float kkc = (float)(Convert.ToDouble(this.kc.Text));
float kkl = (float)(Convert.ToDouble(this.kl.Text));
float kkq = (float)(Convert.ToDouble(this.kq.Text));
/* передали аргументы в kernel функцию */
kernel.SetArg(0, output.Width);
kernel.SetArg(1, output.Height);
kernel.SetArg(2, outputBuffer); // в ядре с global, поскольку для выполнения требуется доступ к output
kernel.SetArg(3, output.Stride);
kernel.SetArg(4, camPos);
kernel.SetArg(5, camForward);
kernel.SetArg(6, right);
kernel.SetArg(7, up);
kernel.SetArg(8, vol.CreateBuffer());
kernel.SetArg(9, vol.GetSize());
kernel.SetArg(10, light);
kernel.SetArg(11, boxMinCon);
kernel.SetArg(12, boxMaxCon);
kernel.SetArg(13, Convert.ToInt16(colorMi.Text));
kernel.SetArg(14, Convert.ToInt16(colorMa.Text));
kernel.SetArg(15, _cutArrea.Checked ? (short)1 : (short)0);
kernel.SetArg(16, _trilinear.Checked ? (short)1 : (short)0);
kernel.SetArg(17, tf.Checked ? (short)1: (short)0 );
kernel.SetArg(18, GetColors());
kernel.SetArg(19, winWidth_vox);
kernel.SetArg(20, winCentre_vox);
kernel.SetArg(21, form_this.knots_counter);
kernel.SetArg(22, Convert.ToInt16(colorMi2.Text));
kernel.SetArg(23, Convert.ToInt16(colorMa2.Text));
kernel.SetArg(24, GetOpacity());
kernel.SetArg(25, ka);
kernel.SetArg(26, kd);
kernel.SetArg(27, ks);
kernel.SetArg(28, exp);
kernel.SetArg(29, kkc);
kernel.SetArg(30, kkl);
kernel.SetArg(31, kkq);
//kernel.SetArg(32, GetCounter());
/* Ставит в очередь команду для исполнения kernel на устройстве */
/*
rayTracingGlobalOffset -
* globalWorkOffset: может использоваться для указания массива значений
* размерности work_dim unsigned который описывает смещение используемое для расчета global ID work-item
* вместо того чтобы global IDs всегда начинался со смещение (0, 0,... 0).
* rayTracingGlobalWorkSize -
* globalWorkSize: общее число global work-items вычисляется как global_work_size[0] *...* global_work_size[work_dim - 1].
*
*/
manager.CQ[deviceIndex].EnqueueNDRangeKernel(kernel, 2, rayTracingGlobalOffset, rayTracingGlobalWorkSize, null);
}
}
/* подождали пока все work-items выполнятся */
manager.CQ[deviceIndex].EnqueueBarrier();
/* для того чтобы получить доступ к памяти и записать в выходное изображение мы просим у OpenCL *наложить* данные в хост-устройство */
IntPtr p = manager.CQ[deviceIndex].EnqueueMapBuffer(outputBuffer, true, MapFlags.READ, IntPtr.Zero, (IntPtr)(output.Stride * output.Height));
//IntPtr z = manager.CQ[deviceIndex].EnqueueMapBuffer(counter, true, MapFlags.READ_WRITE, IntPtr.Zero, (IntPtr)(sizeof(ulong)));
/* когда мы заканчиваем работать с буфером надо вызвать эту функцию */
manager.CQ[deviceIndex].EnqueueUnmapMemObject(outputBuffer, p);
//manager.CQ[deviceIndex].EnqueueUnmapMemObject(counter, z);
manager.CQ[deviceIndex].Finish();
realctr += voxelctr;
voxelCounter.Text = Convert.ToString(realctr);
}
catch (Exception ex)
{
MessageBox.Show("Ray casting exception:" + ex.Message, "Exception");
//Environment.Exit(-1);
}
finally
{
if (outputBuffer != null)
{
outputBuffer.Dispose();
}
}
}
private unsafe void DoRayCasting(BitmapData output)
{
try{
int deviceIndex = 0;
outputBuffer = manager.Context.CreateBuffer(MemFlags.USE_HOST_PTR, output.Stride * output.Height, output.Scan0);
if (first || changeDistance)
{
// camera model UVN
camPos = new Float4()
{
S0 =
vol.GetSize() / 2 - (float)Math.Cos(camAngle * Math.PI / 180) * camDist,
S1 = vol.GetSize() / 2,
S2 = vol.GetSize() / 2 - (float)Math.Sin(camAngle * Math.PI / 180) * camDist,
S3 = 0
};
first = false;
changeDistance = false;
camPosOld = camPos;
}
else{
// rotation around the axis of the cube visualization
if (angleChange && leftChange){
camPosOld.S0 -= camLookAt.S0;
camPosOld.S2 -= camLookAt.S2;
camPos.S0 = (float)Math.Cos(camAngle * Math.PI / 180) * camPosOld.S0 + (float)Math.Sin(camAngle * Math.PI / 180) * camPosOld.S2;
camPos.S1 = vol.GetSize() / 2;
camPos.S2 = -(float)Math.Sin(camAngle * Math.PI / 180) * camPosOld.S0 + (float)Math.Cos(camAngle * Math.PI / 180) * camPosOld.S2;
camPos.S3 = 0;
camPos.S0 += camLookAt.S0;
camPos.S2 += camLookAt.S2;
camPosOld = camPos;
angleChange = false;
leftChange = false;
}
if (angleChange && rightChange){
camPosOld.S0 -= camLookAt.S0;
camPosOld.S2 -= camLookAt.S2;
camPos.S0 = (float)Math.Cos(camAngle * Math.PI / 180) * camPosOld.S0 - (float)Math.Sin(camAngle * Math.PI / 180) * camPosOld.S2;
camPos.S1 = vol.GetSize() / 2;
camPos.S2 = (float)Math.Sin(camAngle * Math.PI / 180) * camPosOld.S0 + (float)Math.Cos(camAngle * Math.PI / 180) * camPosOld.S2;
camPos.S3 = 0;
camPos.S0 += camLookAt.S0;
camPos.S2 += camLookAt.S2;
camPosOld = camPos;
angleChange = false;
leftChange = false;
}
}
camLookAt = new Float4(){
S0 = vol.GetSize() / camfactorX,
S1 = vol.GetSize() / camfactorX,
S2 = vol.GetSize() / camfactorZ,
S3 = 0
};
// direction of the camera, UVN model
camForward = camLookAt.Sub(camPos).Normalize(); // viewing direction
var up = new Float4(0.0f, 1.0f, 0.0f, 0.0f);
var right = MathClass.Cross(up, camForward).Normalize().Times(1.5f);
up = MathClass.Cross(camForward, right).Normalize().Times(-1.5f);
/* processing of the output image in BitmapData OpenCl device */
for (var x = 0; x < output.Width; x += blocksize){
for (var y = 0; y < output.Height; y += blocksize){
var rayTracingGlobalWorkSize = new IntPtr[2]; // work_dim = 2
rayTracingGlobalWorkSize[0] = (IntPtr)(output.Width - x > blocksize ? blocksize : output.Width - x);
rayTracingGlobalWorkSize[1] = (IntPtr)(output.Height - y > blocksize ? blocksize : output.Height - y);
var rayTracingGlobalOffset = new IntPtr[2];
rayTracingGlobalOffset[0] = (IntPtr)x;
rayTracingGlobalOffset[1] = (IntPtr)y;
float ka = (float)(Convert.ToDouble(kamb.Text));
float kd = (float)(Convert.ToDouble(kdiff.Text));
float ks = (float)(Convert.ToDouble(kspec.Text));
float exp = (float)(Convert.ToDouble(specexp.Text));
float kkc = (float)(Convert.ToDouble(this.kc.Text));
float kkl = (float)(Convert.ToDouble(this.kl.Text));
float kkq = (float)(Convert.ToDouble(this.kq.Text));
/* arguments passed to kernel function */
kernel.SetArg(0, output.Width);
kernel.SetArg(1, output.Height);
kernel.SetArg(2, outputBuffer); // in the nucleus with global, as is required for access to the output
kernel.SetArg(3, output.Stride);
kernel.SetArg(4, camPos);
kernel.SetArg(5, camForward);
kernel.SetArg(6, right);
kernel.SetArg(7, up);
kernel.SetArg(8, vol.CreateBuffer());
kernel.SetArg(9, vol.GetSize());
kernel.SetArg(10, light);
kernel.SetArg(11, boxMinCon);
kernel.SetArg(12, boxMaxCon);
kernel.SetArg(13, Convert.ToInt16(colorMi.Text));
kernel.SetArg(14, Convert.ToInt16(colorMa.Text));
kernel.SetArg(15, _cutArrea.Checked ? (short)1 : (short)0);
kernel.SetArg(16, _trilinear.Checked ? (short)1 : (short)0);
kernel.SetArg(17, tf.Checked ? (short)1: (short)0 );
kernel.SetArg(18, GetColors());
kernel.SetArg(19, winWidth_vox);
kernel.SetArg(20, winCentre_vox);
kernel.SetArg(21, form_this.knots_counter);
kernel.SetArg(22, Convert.ToInt16(colorMi2.Text));
kernel.SetArg(23, Convert.ToInt16(colorMa2.Text));
kernel.SetArg(24, GetOpacity());
kernel.SetArg(25, ka);
kernel.SetArg(26, kd);
kernel.SetArg(27, ks);
kernel.SetArg(28, exp);
kernel.SetArg(29, kkc);
kernel.SetArg(30, kkl);
kernel.SetArg(31, kkq);
kernel.SetArg(32, GetCounter());
/* Queues a command for kernel execution on the device */
/* rayTracingGlobalOffset -
* globalWorkOffset: can be used to specify an array of values
* work_dim unsigned dimension that describes the offset used to calculate global ID work-item
* instead of global IDs always start at offset (0, 0,... 0).
* rayTracingGlobalWorkSize -
* globalWorkSize: общее число global work-items вычисляется как global_work_size[0] *...* global_work_size[work_dim - 1].*/
manager.CQ[deviceIndex].EnqueueNDRangeKernel(kernel, 2, rayTracingGlobalOffset, rayTracingGlobalWorkSize, null);
}
}
/*wait until all the work-items executed */
manager.CQ[deviceIndex].EnqueueBarrier();
/* to get access to memory and written to the output image we ask OpenCL * impose * data to the host device */
IntPtr p = manager.CQ[deviceIndex].EnqueueMapBuffer(outputBuffer, true, MapFlags.READ, IntPtr.Zero, (IntPtr)(output.Stride * output.Height));
IntPtr z = manager.CQ[deviceIndex].EnqueueMapBuffer(counter, true, MapFlags.READ_WRITE, IntPtr.Zero, (IntPtr)(sizeof(ulong)));
/* when we finish working with the buffer should call this function */
manager.CQ[deviceIndex].EnqueueUnmapMemObject(outputBuffer, p);
manager.CQ[deviceIndex].EnqueueUnmapMemObject(counter, z);
manager.CQ[deviceIndex].Finish();
realctr += voxelctr;
voxelCounter.Text = Convert.ToString(realctr);
}
catch (Exception ex){
MessageBox.Show("Ray casting exception:" + ex.Message, "Exception");
Environment.Exit(-1);
}
finally{
if (outputBuffer != null){
outputBuffer.Dispose();
}
}
}