Map

Defined in namespace hal

#include <libhal-util/map.hpp>

group Map

Functions

constexpr float map(float p_target, std::pair<float, float> p_input_range, std::pair<float, float> p_output_range)

Map an target value [x] from an input range [a,b] to an output range [c,d].

Another term for this is an affine transformation which follows this equation:

                  / d - c \
   y = (x - a) * | --------| + c
                  \ b - a /

For example:

let x = 5.0 let input_range = [0.0, 10.0] let output_range = [100.0, 200.0] The result will be 150.0

Parameters:

• p_target – - target value within p_input_range to be mapped to the output range.

• p_input_range – - the input range of p_target

• p_output_range – - the output range to map p_target to

Returns:

constexpr float - value mapped from input range to the output range. The output is clamped to the output range.