th_lua_ui.h File Reference

#include "config.h"
#include <algorithm>
#include <cassert>

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Functions
constexpr uint8_t	map_color_channel (int low, int high, int val, int start, int end)
	Remap a value between low and high to an output between start and end.

Function Documentation

map_color_channel()

constexpr uint8_t map_color_channel ( int  low, int  high, int  val, int  start, int  end  )

constexpr

Remap a value between low and high to an output between start and end.

Perform linear scaling of a value from one range to another. This function is primarily intended for mapping bytes to color channel values.

Parameters

low	Lower bound of input range. Must be less than high. [0-255]
high	Upper bound of input range. Must be greater than low. [0-255]
val	Value in [low, high] to scale.
start	Lower bound of output range. May be greater than end. [0-255]
end	Upper bound of output range. May be less than start. [0-255]

Returns

Scaled value in [start, end]