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107 lines
2.1 KiB
107 lines
2.1 KiB
/////////////////////////////////////////////////////////////////////////////////////////////////// |
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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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