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192 lines
6.7 KiB
C++
192 lines
6.7 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
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/// OpenGL Mathematics (glm.g-truc.net)
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///
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/// Copyright (c) 2005 - 2014 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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/// Restrictions:
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/// By making use of the Software for military purposes, you choose to make
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/// a Bunny unhappy.
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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/gtx/gtx_fast_trigonometry.cpp
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/// @date 2013-10-25 / 2014-11-25
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/// @author Christophe Riccio
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///////////////////////////////////////////////////////////////////////////////////
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#include <glm/gtc/type_precision.hpp>
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#include <glm/gtx/fast_trigonometry.hpp>
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#include <glm/gtc/constants.hpp>
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#include <glm/gtc/ulp.hpp>
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#include <ctime>
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#include <cstdio>
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namespace fastCos
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{
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int perf()
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{
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const float begin = -glm::pi<float>();
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const float end = glm::pi<float>();
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float result = 0.f;
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const std::clock_t timestamp1 = std::clock();
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for(float i=begin; i<end; i = glm::next_float(i, end))
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result = glm::fastCos(i);
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const std::clock_t timestamp2 = std::clock();
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for(float i=begin; i<end; i = glm::next_float(i, end))
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result = glm::cos(i);
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const std::clock_t timestamp3 = std::clock();
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const std::clock_t time_fast = timestamp2 - timestamp1;
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const std::clock_t time_default = timestamp3 - timestamp2;
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std::printf("fastCos Time %d clocks\n", static_cast<unsigned int>(time_fast));
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std::printf("cos Time %d clocks\n", static_cast<unsigned int>(time_default));
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return time_fast < time_default ? 0 : 1;
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}
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}//namespace fastCos
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namespace fastSin
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{
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int perf()
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{
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const float begin = -glm::pi<float>();
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const float end = glm::pi<float>();
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float result = 0.f;
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const std::clock_t timestamp1 = std::clock();
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for (float i = begin; i<end; i = glm::next_float(i, end))
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result = glm::fastSin(i);
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const std::clock_t timestamp2 = std::clock();
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for (float i = begin; i<end; i = glm::next_float(i, end))
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result = glm::sin(i);
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const std::clock_t timestamp3 = std::clock();
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const std::clock_t time_fast = timestamp2 - timestamp1;
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const std::clock_t time_default = timestamp3 - timestamp2;
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std::printf("fastSin Time %d clocks\n", static_cast<unsigned int>(time_fast));
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std::printf("sin Time %d clocks\n", static_cast<unsigned int>(time_default));
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return time_fast < time_default ? 0 : 1;
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}
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}//namespace fastSin
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namespace fastTan
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{
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int perf()
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{
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const float begin = -glm::pi<float>();
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const float end = glm::pi<float>();
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float result = 0.f;
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const std::clock_t timestamp1 = std::clock();
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for (float i = begin; i<end; i = glm::next_float(i, end))
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result = glm::fastTan(i);
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const std::clock_t timestamp2 = std::clock();
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for (float i = begin; i<end; i = glm::next_float(i, end))
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result = glm::tan(i);
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const std::clock_t timestamp3 = std::clock();
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const std::clock_t time_fast = timestamp2 - timestamp1;
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const std::clock_t time_default = timestamp3 - timestamp2;
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std::printf("fastTan Time %d clocks\n", static_cast<unsigned int>(time_fast));
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std::printf("tan Time %d clocks\n", static_cast<unsigned int>(time_default));
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return time_fast < time_default ? 0 : 1;
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}
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}//namespace fastTan
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namespace fastAcos
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{
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int perf()
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{
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const float begin = -glm::pi<float>();
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const float end = glm::pi<float>();
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float result = 0.f;
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const std::clock_t timestamp1 = std::clock();
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for (float i = begin; i<end; i = glm::next_float(i, end))
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result = glm::fastAcos(i);
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const std::clock_t timestamp2 = std::clock();
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for (float i = begin; i<end; i = glm::next_float(i, end))
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result = glm::acos(i);
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const std::clock_t timestamp3 = std::clock();
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const std::clock_t time_fast = timestamp2 - timestamp1;
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const std::clock_t time_default = timestamp3 - timestamp2;
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std::printf("fastAcos Time %d clocks\n", static_cast<unsigned int>(time_fast));
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std::printf("acos Time %d clocks\n", static_cast<unsigned int>(time_default));
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return time_fast < time_default ? 0 : 1;
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}
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}//namespace fastAcos
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namespace fastAsin
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{
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int perf()
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{
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const float begin = -glm::pi<float>();
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const float end = glm::pi<float>();
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float result = 0.f;
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const std::clock_t timestamp1 = std::clock();
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for (float i = begin; i<end; i = glm::next_float(i, end))
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result = glm::fastAsin(i);
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const std::clock_t timestamp2 = std::clock();
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for (float i = begin; i<end; i = glm::next_float(i, end))
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result = glm::asin(i);
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const std::clock_t timestamp3 = std::clock();
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const std::clock_t time_fast = timestamp2 - timestamp1;
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const std::clock_t time_default = timestamp3 - timestamp2;
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std::printf("fastAsin Time %d clocks\n", static_cast<unsigned int>(time_fast));
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std::printf("asin Time %d clocks\n", static_cast<unsigned int>(time_default));
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return time_fast < time_default ? 0 : 1;
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}
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}//namespace fastAsin
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namespace fastAtan
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{
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int perf()
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{
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const float begin = -glm::pi<float>();
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const float end = glm::pi<float>();
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float result = 0.f;
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const std::clock_t timestamp1 = std::clock();
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for (float i = begin; i<end; i = glm::next_float(i, end))
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result = glm::fastAtan(i);
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const std::clock_t timestamp2 = std::clock();
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for (float i = begin; i<end; i = glm::next_float(i, end))
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result = glm::atan(i);
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const std::clock_t timestamp3 = std::clock();
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const std::clock_t time_fast = timestamp2 - timestamp1;
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const std::clock_t time_default = timestamp3 - timestamp2;
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std::printf("fastAtan Time %d clocks\n", static_cast<unsigned int>(time_fast));
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std::printf("atan Time %d clocks\n", static_cast<unsigned int>(time_default));
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return time_fast < time_default ? 0 : 1;
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}
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}//namespace fastAtan
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int main()
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{
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int Error(0);
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# ifdef NDEBUG
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Error += ::fastCos::perf();
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Error += ::fastSin::perf();
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Error += ::fastTan::perf();
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Error += ::fastAcos::perf();
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Error += ::fastAsin::perf();
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Error += ::fastAtan::perf();
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# endif//NDEBUG
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return Error;
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}
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