393 lines
8.5 KiB
C++
393 lines
8.5 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
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/// OpenGL Mathematics (glm.g-truc.net)
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///
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/// Copyright (c) 2005 - 2015 G-Truc Creation (www.g-truc.net)
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/// Permission is hereby granted, free of charge, to any person obtaining a copy
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/// of this software and associated documentation files (the "Software"), to deal
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/// in the Software without restriction, including without limitation the rights
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/// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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/// copies of the Software, and to permit persons to whom the Software is
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/// furnished to do so, subject to the following conditions:
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///
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/// The above copyright notice and this permission notice shall be included in
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/// all copies or substantial portions of the Software.
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///
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/// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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/// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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/// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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/// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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/// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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/// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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/// THE SOFTWARE.
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///
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/// @file test/gtc/gtc_round.cpp
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/// @date 2014-11-03 / 2014-11-03
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/// @author Christophe Riccio
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///
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/// @see core (dependence)
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/// @see gtc_round (dependence)
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///////////////////////////////////////////////////////////////////////////////////
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#include <glm/gtc/round.hpp>
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#include <glm/gtc/type_precision.hpp>
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#include <glm/gtc/vec1.hpp>
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#include <glm/gtc/epsilon.hpp>
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#include <vector>
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#include <ctime>
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#include <cstdio>
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namespace isPowerOfTwo
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{
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template <typename genType>
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struct type
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{
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genType Value;
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bool Return;
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};
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int test_int16()
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{
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type<glm::int16> const Data[] =
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{
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{0x0001, true},
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{0x0002, true},
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{0x0004, true},
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{0x0080, true},
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{0x0000, true},
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{0x0003, false}
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};
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int Error(0);
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for(std::size_t i = 0, n = sizeof(Data) / sizeof(type<glm::int16>); i < n; ++i)
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{
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bool Result = glm::isPowerOfTwo(Data[i].Value);
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Error += Data[i].Return == Result ? 0 : 1;
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}
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return Error;
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}
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int test_uint16()
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{
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type<glm::uint16> const Data[] =
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{
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{0x0001, true},
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{0x0002, true},
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{0x0004, true},
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{0x0000, true},
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{0x0000, true},
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{0x0003, false}
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};
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int Error(0);
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for(std::size_t i = 0, n = sizeof(Data) / sizeof(type<glm::uint16>); i < n; ++i)
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{
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bool Result = glm::isPowerOfTwo(Data[i].Value);
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Error += Data[i].Return == Result ? 0 : 1;
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}
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return Error;
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}
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int test_int32()
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{
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type<int> const Data[] =
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{
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{0x00000001, true},
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{0x00000002, true},
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{0x00000004, true},
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{0x0000000f, false},
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{0x00000000, true},
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{0x00000003, false}
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};
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int Error(0);
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for(std::size_t i = 0, n = sizeof(Data) / sizeof(type<int>); i < n; ++i)
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{
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bool Result = glm::isPowerOfTwo(Data[i].Value);
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Error += Data[i].Return == Result ? 0 : 1;
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}
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for(std::size_t i = 0, n = sizeof(Data) / sizeof(type<int>); i < n; ++i)
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{
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glm::bvec1 Result = glm::isPowerOfTwo(glm::ivec1(Data[i].Value));
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Error += glm::all(glm::equal(glm::bvec1(Data[i].Return), Result)) ? 0 : 1;
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}
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for(std::size_t i = 0, n = sizeof(Data) / sizeof(type<int>); i < n; ++i)
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{
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glm::bvec2 Result = glm::isPowerOfTwo(glm::ivec2(Data[i].Value));
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Error += glm::all(glm::equal(glm::bvec2(Data[i].Return), Result)) ? 0 : 1;
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}
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for(std::size_t i = 0, n = sizeof(Data) / sizeof(type<int>); i < n; ++i)
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{
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glm::bvec3 Result = glm::isPowerOfTwo(glm::ivec3(Data[i].Value));
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Error += glm::all(glm::equal(glm::bvec3(Data[i].Return), Result)) ? 0 : 1;
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}
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for(std::size_t i = 0, n = sizeof(Data) / sizeof(type<int>); i < n; ++i)
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{
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glm::bvec4 Result = glm::isPowerOfTwo(glm::ivec4(Data[i].Value));
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Error += glm::all(glm::equal(glm::bvec4(Data[i].Return), Result)) ? 0 : 1;
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}
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return Error;
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}
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int test_uint32()
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{
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type<glm::uint> const Data[] =
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{
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{0x00000001, true},
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{0x00000002, true},
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{0x00000004, true},
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{0x80000000, true},
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{0x00000000, true},
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{0x00000003, false}
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};
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int Error(0);
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for(std::size_t i = 0, n = sizeof(Data) / sizeof(type<glm::uint>); i < n; ++i)
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{
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bool Result = glm::isPowerOfTwo(Data[i].Value);
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Error += Data[i].Return == Result ? 0 : 1;
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}
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return Error;
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}
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int test()
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{
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int Error(0);
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Error += test_int16();
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Error += test_uint16();
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Error += test_int32();
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Error += test_uint32();
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return Error;
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}
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}//isPowerOfTwo
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namespace ceilPowerOfTwo
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{
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template <typename genIUType>
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GLM_FUNC_QUALIFIER genIUType highestBitValue(genIUType Value)
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{
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genIUType tmp = Value;
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genIUType result = genIUType(0);
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while(tmp)
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{
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result = (tmp & (~tmp + 1)); // grab lowest bit
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tmp &= ~result; // clear lowest bit
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}
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return result;
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}
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template <typename genType>
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GLM_FUNC_QUALIFIER genType ceilPowerOfTwo_loop(genType value)
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{
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return glm::isPowerOfTwo(value) ? value : highestBitValue(value) << 1;
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}
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template <typename genType>
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struct type
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{
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genType Value;
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genType Return;
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};
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int test_int32()
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{
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type<glm::int32> const Data[] =
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{
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{0x0000ffff, 0x00010000},
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{-3, -4},
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{-8, -8},
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{0x00000001, 0x00000001},
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{0x00000002, 0x00000002},
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{0x00000004, 0x00000004},
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{0x00000007, 0x00000008},
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{0x0000fff0, 0x00010000},
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{0x0000f000, 0x00010000},
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{0x08000000, 0x08000000},
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{0x00000000, 0x00000000},
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{0x00000003, 0x00000004}
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};
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int Error(0);
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for(std::size_t i = 0, n = sizeof(Data) / sizeof(type<glm::int32>); i < n; ++i)
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{
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glm::int32 Result = glm::ceilPowerOfTwo(Data[i].Value);
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Error += Data[i].Return == Result ? 0 : 1;
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}
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return Error;
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}
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int test_uint32()
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{
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type<glm::uint32> const Data[] =
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{
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{0x00000001, 0x00000001},
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{0x00000002, 0x00000002},
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{0x00000004, 0x00000004},
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{0x00000007, 0x00000008},
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{0x0000ffff, 0x00010000},
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{0x0000fff0, 0x00010000},
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{0x0000f000, 0x00010000},
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{0x80000000, 0x80000000},
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{0x00000000, 0x00000000},
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{0x00000003, 0x00000004}
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};
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int Error(0);
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for(std::size_t i = 0, n = sizeof(Data) / sizeof(type<glm::uint32>); i < n; ++i)
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{
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glm::uint32 Result = glm::ceilPowerOfTwo(Data[i].Value);
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Error += Data[i].Return == Result ? 0 : 1;
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}
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return Error;
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}
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int perf()
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{
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int Error(0);
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std::vector<glm::uint> v;
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v.resize(100000000);
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std::clock_t Timestramp0 = std::clock();
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for(glm::uint32 i = 0, n = static_cast<glm::uint>(v.size()); i < n; ++i)
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v[i] = ceilPowerOfTwo_loop(i);
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std::clock_t Timestramp1 = std::clock();
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for(glm::uint32 i = 0, n = static_cast<glm::uint>(v.size()); i < n; ++i)
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v[i] = glm::ceilPowerOfTwo(i);
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std::clock_t Timestramp2 = std::clock();
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std::printf("ceilPowerOfTwo_loop: %d clocks\n", static_cast<unsigned int>(Timestramp1 - Timestramp0));
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std::printf("glm::ceilPowerOfTwo: %d clocks\n", static_cast<unsigned int>(Timestramp2 - Timestramp1));
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return Error;
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}
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int test()
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{
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int Error(0);
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Error += test_int32();
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Error += test_uint32();
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return Error;
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}
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}//namespace ceilPowerOfTwo
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namespace floorMultiple
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{
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template <typename genType>
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struct type
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{
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genType Source;
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genType Multiple;
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genType Return;
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genType Epsilon;
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};
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int test_float()
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{
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type<glm::float64> const Data[] =
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{
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{3.4, 0.3, 3.3, 0.0001},
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{-1.4, 0.3, -1.5, 0.0001},
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};
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int Error(0);
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for(std::size_t i = 0, n = sizeof(Data) / sizeof(type<glm::float64>); i < n; ++i)
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{
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glm::float64 Result = glm::floorMultiple(Data[i].Source, Data[i].Multiple);
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Error += glm::epsilonEqual(Data[i].Return, Result, Data[i].Epsilon) ? 0 : 1;
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}
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return Error;
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}
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int test()
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{
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int Error(0);
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Error += test_float();
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return Error;
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}
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}//namespace floorMultiple
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namespace ceilMultiple
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{
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template <typename genType>
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struct type
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{
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genType Source;
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genType Multiple;
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genType Return;
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genType Epsilon;
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};
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int test_float()
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{
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type<glm::float64> const Data[] =
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{
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{3.4, 0.3, 3.6, 0.0001},
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{-1.4, 0.3, -1.2, 0.0001},
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};
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int Error(0);
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for(std::size_t i = 0, n = sizeof(Data) / sizeof(type<glm::float64>); i < n; ++i)
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{
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glm::float64 Result = glm::ceilMultiple(Data[i].Source, Data[i].Multiple);
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Error += glm::epsilonEqual(Data[i].Return, Result, Data[i].Epsilon) ? 0 : 1;
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}
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return Error;
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}
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int test()
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{
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int Error(0);
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Error += test_float();
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return Error;
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}
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}//namespace ceilMultiple
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int main()
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{
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int Error(0);
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Error += isPowerOfTwo::test();
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Error += ceilPowerOfTwo::test();
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# ifdef NDEBUG
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Error += ceilPowerOfTwo::perf();
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# endif//NDEBUG
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Error += floorMultiple::test();
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Error += ceilMultiple::test();
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return Error;
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}
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