108 lines
2.1 KiB
C++
108 lines
2.1 KiB
C++
///////////////////////////////////////////////////////////////////////////////////////////////////
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// OpenGL Mathematics Copyright (c) 2005 - 2011 G-Truc Creation (www.g-truc.net)
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///////////////////////////////////////////////////////////////////////////////////////////////////
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// Created : 2011-04-26
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// Updated : 2011-04-26
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// Licence : This source is under MIT licence
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// File : test/gtx/ulp.cpp
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///////////////////////////////////////////////////////////////////////////////////////////////////
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#include <glm/glm.hpp>
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#include <glm/gtx/ulp.hpp>
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#include <iostream>
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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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