0642478668
When vectorization is enabled we start using 'fast' math, and therefore instead of getting perfect 0.0 values we get values that are extremely close to zero.
172 lines
5.3 KiB
C++
172 lines
5.3 KiB
C++
//============================================================================
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// Copyright (c) Kitware, Inc.
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// All rights reserved.
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// See LICENSE.txt for details.
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// This software is distributed WITHOUT ANY WARRANTY; without even
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// the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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// PURPOSE. See the above copyright notice for more information.
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//
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// Copyright 2014 Sandia Corporation.
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// Copyright 2014 UT-Battelle, LLC.
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// Copyright 2014 Los Alamos National Security.
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//
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// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
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// the U.S. Government retains certain rights in this software.
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//
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// Under the terms of Contract DE-AC52-06NA25396 with Los Alamos National
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// Laboratory (LANL), the U.S. Government retains certain rights in
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// this software.
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//============================================================================
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#ifndef vtk_m_testing_TestingImplicitFunctions_h
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#define vtk_m_testing_TestingImplicitFunctions_h
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#include <vtkm/ImplicitFunctions.h>
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#include <vtkm/Math.h>
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#include <vtkm/cont/ArrayHandle.h>
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#include <vtkm/cont/ArrayHandleTransform.h>
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#include <vtkm/cont/testing/Testing.h>
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#include <vtkm/worklet/DispatcherMapField.h>
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#include <vtkm/worklet/WorkletMapField.h>
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VTKM_THIRDPARTY_PRE_INCLUDE
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#include <boost/random/mersenne_twister.hpp>
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#include <boost/random/uniform_real_distribution.hpp>
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VTKM_THIRDPARTY_POST_INCLUDE
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namespace vtkm {
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namespace testing {
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namespace {
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inline vtkm::FloatDefault GetRandomValue()
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{
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static boost::random::mt19937 gen;
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boost::random::uniform_real_distribution<vtkm::FloatDefault> dist(-7.0, 7.0);
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return dist(gen);
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}
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}
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template<typename DeviceAdapter>
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struct TestingImplicitFunctions
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{
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typedef vtkm::Vec<vtkm::FloatDefault, 3> FVec3;
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template<typename ImplicitFunction>
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class EvaluateImplicitFunction : public vtkm::worklet::WorkletMapField
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{
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public:
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typedef void ControlSignature(FieldIn<Vec3>, FieldOut<Scalar>);
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typedef void ExecutionSignature(_1, _2);
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EvaluateImplicitFunction(const ImplicitFunction &function)
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: Function(function)
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{ }
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template<typename VecType, typename ScalarType>
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VTKM_EXEC_EXPORT
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void operator()(const VecType &point, ScalarType &val) const
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{
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val = this->Function.Value(point);
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}
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private:
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ImplicitFunction Function;
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};
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static void TestSphereValue()
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{
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typedef EvaluateImplicitFunction<vtkm::Sphere> EvalWorklet;
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typedef vtkm::worklet::DispatcherMapField<EvalWorklet, DeviceAdapter>
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EvalDispatcher;
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FVec3 center(GetRandomValue(), GetRandomValue(), GetRandomValue());
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FloatDefault radius = vtkm::Abs(GetRandomValue());
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vtkm::Sphere sphere(center, radius);
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FloatDefault r = radius;
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FVec3 cube[8] = { center + FVec3(0, 0, 0),
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center + FVec3(r, 0, 0),
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center + FVec3(0, r, 0),
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center + FVec3(r, r, 0),
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center + FVec3(0, 0, r),
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center + FVec3(r, 0, r),
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center + FVec3(0, r, r),
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center + FVec3(r, r, r)
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};
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vtkm::cont::ArrayHandle<FVec3> points = vtkm::cont::make_ArrayHandle(cube, 8);
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EvalWorklet eval(sphere);
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vtkm::cont::ArrayHandle<FloatDefault> values;
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EvalDispatcher(eval).Invoke(points, values);
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vtkm::cont::ArrayHandle<FloatDefault>::PortalConstControl portal =
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values.GetPortalConstControl();
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bool success = (portal.Get(0) == -(r*r)) &&
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test_equal(portal.Get(1), FloatDefault(0.0) ) &&
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test_equal(portal.Get(2), FloatDefault(0.0) ) &&
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test_equal(portal.Get(4), FloatDefault(0.0) ) &&
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(portal.Get(3) > 0.0) &&
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(portal.Get(5) > 0.0) &&
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(portal.Get(6) > 0.0) &&
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(portal.Get(7) > 0.0);
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VTKM_TEST_ASSERT(success, "Sphere: did not get expected results.");
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}
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static void TestPlaneValue()
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{
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typedef EvaluateImplicitFunction<vtkm::Plane> EvalWorklet;
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typedef vtkm::worklet::DispatcherMapField<EvalWorklet, DeviceAdapter>
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EvalDispatcher;
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FVec3 origin(GetRandomValue(), GetRandomValue(), GetRandomValue());
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FVec3 normal(GetRandomValue(), GetRandomValue(), GetRandomValue());
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vtkm::Plane plane(origin, normal);
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FloatDefault t[] = { -2.0, -1.0, 0.0, 1.0, 2.0 };
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vtkm::cont::ArrayHandle<FVec3> points;
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points.Allocate(5);
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for (int i = 0; i < 5; ++i)
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{
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points.GetPortalControl().Set(i, origin + (t[i] * normal));
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}
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EvalWorklet eval(plane);
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vtkm::cont::ArrayHandle<FloatDefault> values;
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EvalDispatcher(eval).Invoke(points, values);
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vtkm::cont::ArrayHandle<FloatDefault>::PortalConstControl portal =
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values.GetPortalConstControl();
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bool success = (portal.Get(0) < 0.0) &&
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(portal.Get(1) < 0.0) &&
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test_equal(portal.Get(2), FloatDefault(0.0) ) &&
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(portal.Get(3) > 0.0) &&
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(portal.Get(4) > 0.0);
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VTKM_TEST_ASSERT(success, "Plane: did not get expected results.");
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}
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static void Run()
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{
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for (int i = 0; i < 50; ++i)
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{
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TestSphereValue();
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}
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for (int i = 0; i < 50; ++i)
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{
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TestPlaneValue();
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}
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}
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};
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}
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} // namespace vtkm::testing
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#endif // vtk_m_testing_TestingImplicitFunctions_h
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