This group contains several useful tools for development, debugging and testing. 
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| file | arg_parser.h | 
|  | A tool to parse command line arguments. 
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| file | color.h | 
|  | Tools to manage RGB colors. 
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| file | math.h | 
|  | Some extensions to the standard cmathlibrary.
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| file | random.h | 
|  | Mersenne Twister random number generator. 
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| file | tolerance.h | 
|  | A basic tool to handle the anomalies of calculation with floating point numbers. 
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| file | test_tools.h | 
|  | Some utilities to write test programs. 
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| Color | distantColor (const Color &c) | 
|  | Returns a visibly distinct Color.  More... 
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| Color | distantBW (const Color &c) | 
|  | Returns black for light colors and white for the dark ones.  More... 
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| bool | isNaN (double v) | 
|  | Check whether the parameter is NaN or not.  More... 
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| double | round (double r) | 
|  | Round a value to its closest integer. 
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| const Color | WHITE (1, 1, 1) | 
|  | White color constant. 
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| const Color | BLACK (0, 0, 0) | 
|  | Black color constant. 
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| const Color | RED (1, 0, 0) | 
|  | Red color constant. 
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| const Color | GREEN (0, 1, 0) | 
|  | Green color constant. 
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| const Color | BLUE (0, 0, 1) | 
|  | Blue color constant. 
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| const Color | YELLOW (1, 1, 0) | 
|  | Yellow color constant. 
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| const Color | MAGENTA (1, 0, 1) | 
|  | Magenta color constant. 
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| const Color | CYAN (0, 1, 1) | 
|  | Cyan color constant. 
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| const Color | GREY (0, 0, 0) | 
|  | Grey color constant. 
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| const Color | DARK_RED (.5, 0, 0) | 
|  | Dark red color constant. 
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| const Color | DARK_GREEN (0,.5, 0) | 
|  | Dark green color constant. 
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| const Color | DARK_BLUE (0, 0,.5) | 
|  | Drak blue color constant. 
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| const Color | DARK_YELLOW (.5,.5, 0) | 
|  | Dark yellow color constant. 
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| const Color | DARK_MAGENTA (.5, 0,.5) | 
|  | Dark magenta color constant. 
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| const Color | DARK_CYAN (0,.5,.5) | 
|  | Dark cyan color constant. 
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| const long double | E = 2.7182818284590452353602874713526625L | 
|  | The Euler constant. 
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| const long double | LOG2E = 1.4426950408889634073599246810018921L | 
|  | log_2(e) 
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| const long double | LOG10E = 0.4342944819032518276511289189166051L | 
|  | log_10(e) 
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| const long double | LN2 = 0.6931471805599453094172321214581766L | 
|  | ln(2) 
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| const long double | LN10 = 2.3025850929940456840179914546843642L | 
|  | ln(10) 
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| const long double | PI = 3.1415926535897932384626433832795029L | 
|  | pi 
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| const long double | PI_2 = 1.5707963267948966192313216916397514L | 
|  | pi/2 
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| const long double | PI_4 = 0.7853981633974483096156608458198757L | 
|  | pi/4 
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| const long double | SQRT2 = 1.4142135623730950488016887242096981L | 
|  | sqrt(2) 
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| const long double | SQRT1_2 = 0.7071067811865475244008443621048490L | 
|  | 1/sqrt(2) 
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          | Color lemon::distantColor | ( | const Color & | c | ) |  |  | inline | 
 
Returns a Color which is as different from the given parameter as it is possible. 
 
 
  
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          | Color lemon::distantBW | ( | const Color & | c | ) |  |  | inline | 
 
Returns black for light colors and white for the dark ones. 
 
 
  
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          | bool lemon::isNaN | ( | double | v | ) |  |  | inline | 
 
This function checks whether the parameter is NaN or not. Is should be equivalent with std::isnan(), but it is not provided by all compilers.