Added GPU SoftBody constraint solvers for DirectX 11 (Direct Compute) and OpenCL, thanks to AMD.

See also http://code.google.com/p/bullet/issues/detail?id=390 Added Demos/DX11ClothDemo (an OpenCL cloth demo will follow soon)
2010-07-20 16:09:53 +00:00
parent 5fd08505ba
commit 11fa2e8b43
99 changed files with 117195 additions and 0 deletions
--- a/src/BulletMultiThreaded/GpuSoftBodySolvers/OpenCL/btSoftBodySolverBuffer_OpenCL.h
+++ b/src/BulletMultiThreaded/GpuSoftBodySolvers/OpenCL/btSoftBodySolverBuffer_OpenCL.h
@@ -0,0 +1,183 @@
+/*
+Bullet Continuous Collision Detection and Physics Library
+Copyright (c) 2003-2006 Erwin Coumans  http://continuousphysics.com/Bullet/
+
+This software is provided 'as-is', without any express or implied warranty.
+In no event will the authors be held liable for any damages arising from the use of this software.
+Permission is granted to anyone to use this software for any purpose, 
+including commercial applications, and to alter it and redistribute it freely, 
+subject to the following restrictions:
+
+1. The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation would be appreciated but is not required.
+2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software.
+3. This notice may not be removed or altered from any source distribution.
+*/
+
+#ifndef BT_SOFT_BODY_SOLVER_BUFFER_OPENCL_H
+#define BT_SOFT_BODY_SOLVER_BUFFER_OPENCL_H
+
+// OpenCL support
+#include <CL/cl.hpp>
+
+#ifndef SAFE_RELEASE
+#define SAFE_RELEASE(p)      { if(p) { (p)->Release(); (p)=NULL; } }
+#endif
+
+template <typename ElementType> class btOpenCLBuffer
+{
+protected:
+	cl::CommandQueue m_queue;
+	btAlignedObjectArray< ElementType > * m_CPUBuffer;
+	cl::Buffer m_buffer;
+
+	int  m_gpuSize;
+	bool m_onGPU;
+
+	bool m_readOnlyOnGPU;
+
+	bool m_allocated;
+	// TODO: Remove this once C++ bindings are fixed
+	cl::Context context;
+
+	bool createBuffer( cl::Buffer *preexistingBuffer = 0)
+	{
+		cl_int err;
+		 
+
+		if( preexistingBuffer )
+		{
+			m_buffer = *preexistingBuffer;
+		} 
+		else {
+			m_buffer = cl::Buffer(
+					context, 
+					m_readOnlyOnGPU ? CL_MEM_READ_ONLY : CL_MEM_READ_WRITE, 
+					m_CPUBuffer->size() * sizeof(ElementType), 
+					0, 
+					&err);
+			if( err != CL_SUCCESS )
+			{
+				btAssert( "Buffer::Buffer(m_buffer)");
+			}
+		}
+
+		m_gpuSize = m_CPUBuffer->size();
+		return true;
+	}
+
+public:
+	btOpenCLBuffer( 
+		cl::CommandQueue queue,
+		btAlignedObjectArray< ElementType > *CPUBuffer, 
+		bool readOnly) :
+		m_queue(queue),
+		m_CPUBuffer(CPUBuffer),
+		m_gpuSize(0),
+		m_onGPU(false),
+		m_readOnlyOnGPU(readOnly),
+		m_allocated(false)
+	{
+		context = m_queue.getInfo<CL_QUEUE_CONTEXT>();
+	}
+
+	~btOpenCLBuffer()
+	{
+	}
+
+	cl::Buffer getBuffer()
+	{
+		return m_buffer;
+	}
+
+	bool moveToGPU()
+	{
+		cl_int err;
+
+		if( (m_CPUBuffer->size() != m_gpuSize) )
+		{
+			m_onGPU = false;
+		}
+
+		if( !m_onGPU && m_CPUBuffer->size() > 0 )
+		{
+			if (!m_allocated || (m_CPUBuffer->size() != m_gpuSize)) {
+				if (!createBuffer()) {
+					return false;
+				}
+				m_allocated = true;
+			}
+			
+			err = m_queue.enqueueWriteBuffer(
+				m_buffer,
+				CL_FALSE,
+				0,
+				m_CPUBuffer->size() * sizeof(ElementType), 
+				&((*m_CPUBuffer)[0]));
+			if( err != CL_SUCCESS )
+			{
+				btAssert( "CommandQueue::enqueueWriteBuffer(m_buffer)" );
+			}
+
+			m_onGPU = true;
+		}
+
+		return true;
+	}
+
+	bool moveFromGPU()
+	{
+		cl_int err;
+
+		if (m_CPUBuffer->size() > 0) {
+			if (m_onGPU && !m_readOnlyOnGPU) {
+				err = m_queue.enqueueReadBuffer(
+					m_buffer,
+					CL_TRUE,
+					0,
+					m_CPUBuffer->size() * sizeof(ElementType), 
+					&((*m_CPUBuffer)[0]));
+
+				if( err != CL_SUCCESS )
+				{
+					btAssert( "CommandQueue::enqueueReadBuffer(m_buffer)" );
+				}
+
+				m_onGPU = false;
+			}
+		}
+
+		return true;
+	}
+
+	bool copyFromGPU()
+	{
+		cl_int err;
+
+		if (m_CPUBuffer->size() > 0) {
+			if (m_onGPU && !m_readOnlyOnGPU) {
+				err = m_queue.enqueueReadBuffer(
+					m_buffer,
+					CL_TRUE,
+					0,
+					m_CPUBuffer->size() * sizeof(ElementType), 
+					&((*m_CPUBuffer)[0]));
+
+				if( err != CL_SUCCESS )
+				{
+					btAssert( "CommandQueue::enqueueReadBuffer(m_buffer)");
+				}
+
+			}
+		}
+
+		return true;
+	}
+
+	virtual void changedOnCPU()
+	{
+		m_onGPU = false;
+	}
+}; // class btOpenCLBuffer
+
+
+#endif // #ifndef BT_SOFT_BODY_SOLVER_BUFFER_OPENCL_H