C++ (Cpp) BodySystemCPU::getArray Examples

Example #1

File: nbody.cpp Project: benl23x5/papers

        bool _compareResults(int numBodies)
        {
            assert(m_nbodyCuda);

            bool passed = true;

            m_nbody->update(0.001f);

            {
                m_nbodyCpu = new BodySystemCPU<T>(numBodies);

                m_nbodyCpu->setArray(BODYSYSTEM_POSITION, m_hPos);
                m_nbodyCpu->setArray(BODYSYSTEM_VELOCITY, m_hVel);

                m_nbodyCpu->update(0.001f);

                T *cudaPos = m_nbodyCuda->getArray(BODYSYSTEM_POSITION);
                T *cpuPos  = m_nbodyCpu->getArray(BODYSYSTEM_POSITION);

                T tolerance = 0.0005f;

                for (int i = 0; i < numBodies; i++)
                {
                    if (fabs(cpuPos[i] - cudaPos[i]) > tolerance)
                    {
                        passed = false;
                        printf("Error: (host)%f != (device)%f\n", cpuPos[i], cudaPos[i]);
                    }
                }
            }
            return passed;
        }