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c70056491d
This cleans up the example code. Now all of the examples use the "namespace compute = boost::compute" alias. This shortens the example code making it less verbose and more clear. Also cleans up a few style issues.
56 lines
1.7 KiB
C++
56 lines
1.7 KiB
C++
//---------------------------------------------------------------------------//
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// Copyright (c) 2013 Kyle Lutz <kyle.r.lutz@gmail.com>
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//
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// Distributed under the Boost Software License, Version 1.0
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// See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt
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//
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// See http://kylelutz.github.com/compute for more information.
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//---------------------------------------------------------------------------//
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#include <iostream>
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#include <iterator>
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#include <boost/compute.hpp>
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namespace compute = boost::compute;
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// this example shows how to use the max_element() algorithm along with
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// a transform_iterator and the length() function to find the longest
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// 4-component vector in an array of vectors
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int main()
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{
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using compute::float4_;
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// vectors data
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float data[] = { 1.0f, 2.0f, 3.0f, 0.0f,
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4.0f, 5.0f, 6.0f, 0.0f,
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7.0f, 8.0f, 9.0f, 0.0f,
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0.0f, 0.0f, 0.0f, 0.0f };
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// create device vector with the vector data
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compute::vector<float4_> vector(
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reinterpret_cast<float4_ *>(data),
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reinterpret_cast<float4_ *>(data) + 4
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);
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// find the longest vector
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compute::vector<float4_>::const_iterator iter =
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compute::max_element(
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compute::make_transform_iterator(
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vector.begin(), compute::length<float4_>()
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),
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compute::make_transform_iterator(
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vector.end(), compute::length<float4_>()
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)
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).base();
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// print the index of the longest vector
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std::cout << "longest vector index: "
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<< std::distance(vector.begin(), iter)
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<< std::endl;
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return 0;
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}
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