OpenSpace/src/properties/matrix/mat2property.cpp

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 * OpenSpace                                                                             *
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 * Copyright (c) 2014-2017                                                               *
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#include <openspace/properties/matrix/mat2property.h>

#include <ghoul/misc/misc.h>

#include <limits>
#include <sstream>
#include <vector>

namespace {

glm::mat2x2 fromLuaConversion(lua_State* state, bool& success) {
    glm::mat2x2 result;
    int number = 1;
    for (glm::length_t i = 0; i < ghoul::glm_cols<glm::mat2x2>::value; ++i) {
        for (glm::length_t j = 0; j < ghoul::glm_rows<glm::mat2x2>::value; ++j) {
            lua_getfield(state, -1, std::to_string(number).c_str());
            if (lua_isnumber(state, -1) != 1) {
                success = false;
                return glm::mat2x2(0);
            } else {
                result[i][j]
                        = static_cast<glm::mat2x2::value_type>(lua_tonumber(state, -1));
                lua_pop(state, 1);
                ++number;
            }
        }
    }
    success = true;
    return result;
}

bool toLuaConversion(lua_State* state, glm::mat2x2 value) {
    lua_newtable(state);
    int number = 1;
    for (glm::length_t i = 0; i < ghoul::glm_cols<glm::mat2x2>::value; ++i) {
        for (glm::length_t j = 0; j < ghoul::glm_rows<glm::mat2x2>::value; ++j) {
            lua_pushnumber(state, static_cast<lua_Number>(value[i][j]));
            lua_setfield(state, -2, std::to_string(number).c_str());
            ++number;
        }
    }
    return true;
}

glm::mat2x2 fromStringConversion(std::string val, bool& success) {
    glm::mat2x2 result;
    std::vector<std::string> tokens = ghoul::tokenizeString(val, ',');
    if (tokens.size() !=
        (ghoul::glm_rows<glm::mat2x2>::value * ghoul::glm_cols<glm::mat2x2>::value))
    {
        success = false;
        return result;
    }
    int number = 0;
    for (glm::length_t i = 0; i < ghoul::glm_cols<glm::mat2x2>::value; ++i) {
        for (glm::length_t j = 0; j < ghoul::glm_rows<glm::mat2x2>::value; ++j) {
            std::stringstream s(tokens[number]);
            glm::mat2x2::value_type v;
            s >> v;
            if (s.fail()) {
                success = false;
                return result;
            }
            else {
                result[i][j] = v;
                ++number;
            }
        }
    }
    success = true;
    return result;
}

bool toStringConversion(std::string& outValue, glm::mat2x2 inValue) {
    outValue = "";
    for (glm::length_t i = 0; i < ghoul::glm_cols<glm::mat2x2>::value; ++i) {
        for (glm::length_t j = 0; j < ghoul::glm_rows<glm::mat2x2>::value; ++j) {
            outValue += std::to_string(inValue[i][j]) + ",";
        }
        outValue.pop_back();
    }
    return true;
}

} // namespace

namespace openspace::properties {

using nl = std::numeric_limits<float>;

REGISTER_NUMERICALPROPERTY_SOURCE(
    Mat2Property,
    glm::mat2x2,
    glm::mat2x2(0),
    glm::mat2x2(
        nl::lowest(), nl::lowest(),
        nl::lowest(), nl::lowest()
    ),
    glm::mat2x2(
        nl::max(), nl::max(),
        nl::max(), nl::max()
    ),
    glm::mat2x2(
        0.01f, 0.01f,
        0.01f, 0.01f
    ),
    fromLuaConversion,
    toLuaConversion,
    fromStringConversion,
    toStringConversion,
    LUA_TTABLE
)

}  // namespace openspace::properties