xge::Game::initVariables()

void xge::Game::initVariables(void)
{
    // TODO: Write code to parse the rest of the text fields
    //      -- exprtk lib will parse text variables and expressions

    randomNumber<float> randomNumberFloat;
    randomRange<float> randomRangeFloat;

    exprtk::symbol_table<float> symbolTable;
    symbolTable.add_function("random.number", randomNumberFloat);
    symbolTable.add_function("random.range", randomRangeFloat);
    symbolTable.add_constant("screen.left", 0);
    symbolTable.add_constant("screen.right", windowDesc.width);
    symbolTable.add_constant("screen.width.center", windowDesc.width / 2);
    symbolTable.add_constant("screen.height.center", windowDesc.height / 2);
    for (auto variable : variables)
    {
        symbolTable.add_constant(variable.first, variable.second);
    }

    exprtk::expression<float> expression;
    expression.register_symbol_table(symbolTable);
    exprtk::parser<float> parser;
    std::string expression_str;

    for (auto &object : objects)
    {
        expression_str = object.sposition.x;
        parser.compile(expression_str, expression);
        object.position.x = expression.value();

        expression_str = object.sposition.y;
        parser.compile(expression_str, expression);
        object.position.y = expression.value();

        expression_str = object.svelocity.x;
        parser.compile(expression_str, expression);
        object.velocity.x = expression.value();

        expression_str = object.svelocity.y;
        parser.compile(expression_str, expression);
        object.velocity.y = expression.value();
    }
}