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#pragma once
#include "rawaccel-base.hpp"
#include <float.h>
namespace rawaccel {
struct power_base {
static double base_fn(double x, const accel_args& args)
{
// f(x) = w(mx)^k
return args.weight * pow(args.scale * x, args.exponent_power);
}
};
template <bool Gain> struct power;
template <>
struct power<LEGACY> : power_base {
vec2d cap = { DBL_MAX, DBL_MAX };
power(const accel_args& args)
{
if (args.cap.x > 0) {
cap.x = args.cap.x;
cap.y = base_fn(cap.x, args);
}
}
double operator()(double speed, const accel_args& args) const
{
if (speed < cap.x) {
return base_fn(speed, args);
}
return cap.y;
}
};
template <>
struct power<GAIN> : power_base {
vec2d cap = { DBL_MAX, DBL_MAX };
double constant = 0;
power(const accel_args& args)
{
if (args.cap.x > 0) {
cap.x = args.cap.x;
double output = base_fn(cap.x, args);
cap.y = output * (args.exponent_power + 1);
constant = -args.exponent_power * output * args.cap.x;
}
}
double operator()(double speed, const accel_args& args) const
{
if (speed < cap.x) {
return base_fn(speed, args);
}
else {
return cap.y + constant / speed;
}
}
};
}
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