Implicit surface rendering via ray tracing
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/*
* Copyright (c) 2014-2021, NVIDIA CORPORATION. All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* SPDX-FileCopyrightText: Copyright (c) 2014-2021 NVIDIA CORPORATION
* SPDX-License-Identifier: Apache-2.0
*/
//--------------------------------------------------------------------------------------------------
/**
\class InputParser
\brief InputParser is a Simple command line parser
Example of usage for: test.exe -f name.txt -size 200 100
Parsing the command line: mandatory '-f' for the filename of the scene
\code{.cpp}
nvh::InputParser parser(argc, argv);
std::string filename = parser.getString("-f");
if(filename.empty()) filename = "default.txt";
if(parser.exist("-size") {
auto values = parser.getInt2("-size");
\endcode
*/
#pragma once
#include <string>
#include <vector>
class InputParser
{
public:
InputParser(int& argc, char** argv)
{
for(int i = 1; i < argc; ++i)
{
if(argv[i])
{
m_tokens.emplace_back(argv[i]);
}
}
}
auto findOption(const std::string& option) const { return std::find(m_tokens.begin(), m_tokens.end(), option); }
const std::string getString(const std::string& option, std::string defaultString = "") const
{
if(exist(option))
{
auto itr = findOption(option);
if(itr != m_tokens.end() && ++itr != m_tokens.end())
{
return *itr;
}
}
return defaultString;
}
std::vector<std::string> getString(const std::string& option, uint32_t nbElem) const
{
auto itr = findOption(option);
std::vector<std::string> items;
while(itr != m_tokens.end() && ++itr != m_tokens.end() && nbElem-- > 0)
{
items.push_back((*itr));
}
return items;
}
int getInt(const std::string& option, int defaultValue = 0) const
{
if(exist(option))
return std::stoi(getString(option));
return defaultValue;
}
auto getInt2(const std::string& option, std::array<int, 2> defaultValues = {0, 0}) const
{
if(exist(option))
{
auto items = getString(option, 2);
if(items.size() == 2)
{
defaultValues[0] = std::stoi(items[0]);
defaultValues[1] = std::stoi(items[1]);
}
}
return defaultValues;
}
float getFloat(const std::string& option, float defaultValue = 0.0f) const
{
if(exist(option))
return std::stof(getString(option));
return defaultValue;
}
bool exist(const std::string& option) const { return findOption(option) != m_tokens.end(); }
private:
std::vector<std::string> m_tokens;
};