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128 lines
3.1 KiB
C++
128 lines
3.1 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/gtc/gtc_ulp.cpp
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/// @date 2011-04-26 / 2014-11-25
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/// @author Christophe Riccio
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///////////////////////////////////////////////////////////////////////////////////
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#include <glm/gtc/ulp.hpp>
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#include <limits>
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int test_ulp_float_dist()
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{
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int Error = 0;
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float A = 1.0f;
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float B = glm::next_float(A);
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Error += A != B ? 0 : 1;
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float C = glm::prev_float(B);
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Error += A == C ? 0 : 1;
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int D = glm::float_distance(A, B);
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Error += D == 1 ? 0 : 1;
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int E = glm::float_distance(A, C);
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Error += E == 0 ? 0 : 1;
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return Error;
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}
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int test_ulp_float_step()
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{
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int Error = 0;
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float A = 1.0f;
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for(int i = 10; i < 1000; i *= 10)
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{
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float B = glm::next_float(A, i);
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Error += A != B ? 0 : 1;
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float C = glm::prev_float(B, i);
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Error += A == C ? 0 : 1;
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int D = glm::float_distance(A, B);
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Error += D == i ? 0 : 1;
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int E = glm::float_distance(A, C);
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Error += E == 0 ? 0 : 1;
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}
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return Error;
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}
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int test_ulp_double_dist()
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{
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int Error = 0;
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double A = 1.0;
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double B = glm::next_float(A);
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Error += A != B ? 0 : 1;
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double C = glm::prev_float(B);
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Error += A == C ? 0 : 1;
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int D = glm::float_distance(A, B);
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Error += D == 1 ? 0 : 1;
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int E = glm::float_distance(A, C);
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Error += E == 0 ? 0 : 1;
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return Error;
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}
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int test_ulp_double_step()
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{
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int Error = 0;
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double A = 1.0;
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for(int i = 10; i < 1000; i *= 10)
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{
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double B = glm::next_float(A, i);
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Error += A != B ? 0 : 1;
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double C = glm::prev_float(B, i);
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Error += A == C ? 0 : 1;
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int D = glm::float_distance(A, B);
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Error += D == i ? 0 : 1;
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int E = glm::float_distance(A, C);
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Error += E == 0 ? 0 : 1;
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}
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return Error;
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}
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int main()
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{
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int Error = 0;
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Error += test_ulp_float_dist();
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Error += test_ulp_float_step();
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Error += test_ulp_double_dist();
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Error += test_ulp_double_step();
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return Error;
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}
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