deadzone.hpp

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#pragma once
 
#include "point.hpp"
#include <cmath>
#include <functional>
 
namespace input
{
//  Deadzone filter functions for a single value
using deadzone_float_filter = std::function<float(const float, const float)>;
 
//  Deadzone filter functions for two values (XY)
using deadzone_point_filter = std::function<point(const float, const float, const float)>;
 
//  ----------------------------------------------------------------------------
static auto no_deadzone(const float deadzone, const float value) -> float
{
    return value;
}
 
//  ----------------------------------------------------------------------------
static auto basic_deadzone(const float deadzone, const float value) -> float
{
    if(std::abs(value) >= deadzone)
    {
        return value;
    }
 
    return 0.0f;
}
 
//  ----------------------------------------------------------------------------
static auto no_deadzone(const float deadzone, const float x, const float y) -> point
{
    return {x, y};
}
 
//  ----------------------------------------------------------------------------
static auto radial_deadzone(const float deadzone, const float x, const float y) -> point
{
    //  Calculate vector length
    const double length = std::sqrt(x * x + y * y);
 
    //  Normalize if needed
    if(length > 1.0f)
    {
        const float nx = x / length;
        const float ny = y / length;
        return radial_deadzone(deadzone, nx, ny);
    }
 
    if(length >= deadzone)
    {
        return {x, y};
    }
 
    return {0.0f, 0.0f};
}
} // namespace input