mirror of
https://github.com/g-truc/glm.git
synced 2024-09-20 16:32:16 +00:00
96 lines
2.7 KiB
C++
96 lines
2.7 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
|
|
/// OpenGL Mathematics (glm.g-truc.net)
|
|
///
|
|
/// Copyright (c) 2005 - 2014 G-Truc Creation (www.g-truc.net)
|
|
/// Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
/// of this software and associated documentation files (the "Software"), to deal
|
|
/// in the Software without restriction, including without limitation the rights
|
|
/// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
/// copies of the Software, and to permit persons to whom the Software is
|
|
/// furnished to do so, subject to the following conditions:
|
|
///
|
|
/// The above copyright notice and this permission notice shall be included in
|
|
/// all copies or substantial portions of the Software.
|
|
///
|
|
/// Restrictions:
|
|
/// By making use of the Software for military purposes, you choose to make
|
|
/// a Bunny unhappy.
|
|
///
|
|
/// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
/// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
/// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
/// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
/// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
/// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
/// THE SOFTWARE.
|
|
///
|
|
/// @file test/gtx/gtx_integer.cpp
|
|
/// @date 2011-10-11 / 2014-11-25
|
|
/// @author Christophe Riccio
|
|
///////////////////////////////////////////////////////////////////////////////////
|
|
|
|
#include <glm/exponential.hpp>
|
|
#include <glm/gtc/epsilon.hpp>
|
|
#include <glm/gtx/integer.hpp>
|
|
#include <cstdio>
|
|
/*
|
|
int test_floor_log2()
|
|
{
|
|
int Error = 0;
|
|
|
|
for(std::size_t i = 1; i < 1000000; ++i)
|
|
{
|
|
glm::uint A = glm::floor_log2(glm::uint(i));
|
|
glm::uint B = glm::uint(glm::floor(glm::log2(double(i)))); // Will fail with float, lack of accuracy
|
|
|
|
Error += A == B ? 0 : 1;
|
|
assert(!Error);
|
|
}
|
|
|
|
return Error;
|
|
}
|
|
*/
|
|
int test_log2()
|
|
{
|
|
int Error = 0;
|
|
|
|
for(std::size_t i = 1; i < 24; ++i)
|
|
{
|
|
glm::uint A = glm::log2(glm::uint(1 << i));
|
|
glm::uint B = glm::uint(glm::log2(double(1 << i)));
|
|
|
|
//Error += glm::equalEpsilon(double(A), B, 1.0) ? 0 : 1;
|
|
Error += glm::abs(double(A) - B) <= 24 ? 0 : 1;
|
|
assert(!Error);
|
|
|
|
printf("Log2(%d) Error: %d, %d\n", 1 << i, A, B);
|
|
}
|
|
|
|
printf("log2 error: %d\n", Error);
|
|
|
|
return Error;
|
|
}
|
|
|
|
int test_nlz()
|
|
{
|
|
int Error = 0;
|
|
|
|
for(glm::uint i = 1; i < glm::uint(33); ++i)
|
|
Error += glm::nlz(i) == glm::uint(31u) - glm::findMSB(i) ? 0 : 1;
|
|
//printf("%d, %d\n", glm::nlz(i), 31u - glm::findMSB(i));
|
|
|
|
return Error;
|
|
}
|
|
|
|
int main()
|
|
{
|
|
int Error = 0;
|
|
|
|
Error += test_nlz();
|
|
// Error += test_floor_log2();
|
|
Error += test_log2();
|
|
|
|
return Error;
|
|
}
|
|
|