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#pragma once
#include "rawaccel-base.hpp"
#include <float.h>
namespace rawaccel {
struct power_base {
static double base_fn(double x, double scale, const accel_args& args)
{
// f(x) = w(mx)^k
return args.weight * pow(scale * x, args.exponent_power);
}
};
template <bool Gain> struct power;
template <>
struct power<LEGACY> : power_base {
double cap = DBL_MAX;
double scale = 0;
power(const accel_args& args)
{
// Note that cap types may overwrite this below.
scale = args.scale;
switch (args.cap_mode){
case classic_cap_mode::in:
if (args.cap.x > 0)
{
cap = base_fn(
args.cap.x,
args.scale,
args);
}
break;
case classic_cap_mode::io:
if (args.cap.x > 0 &&
args.cap.y > 1)
{
cap = args.cap.y;
scale = scale_from_sens_point(
args.cap.y,
args.cap.x,
args.exponent_power);
}
break;
case classic_cap_mode::out:
default:
if (args.cap.y > 1)
{
cap = args.cap.y;
}
break;
}
/*
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
{
return minsd(base_fn(speed, scale, args), cap);
}
double static scale_from_sens_point(double sens, double input, double power)
{
return pow(sens, 1 / power) / input;
}
};
template <>
struct power<GAIN> : power_base {
vec2d cap = { DBL_MAX, DBL_MAX };
double constant = 0;
double scale = 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;
}
*/
// Note that cap types may overwrite this below.
scale = args.scale;
switch (args.cap_mode) {
case classic_cap_mode::in:
if (args.cap.x > 0) {
cap.x = args.cap.x;
cap.y = gain(
args.cap.x,
args.exponent_power,
scale);
constant = integration_constant(
cap.x,
cap.y,
base_fn(cap.x, scale, args));
}
case classic_cap_mode::io:
if (args.cap.x > 0 &&
args.cap.y > 1) {
cap.x = args.cap.x;
cap.y = args.cap.y;
scale = scale_from_gain_point(
args.cap.x,
args.cap.y,
args.exponent_power);
constant = integration_constant(
cap.x,
cap.y,
base_fn(cap.x, scale, args));
}
case classic_cap_mode::out:
default:
if (args.cap.y > 1) {
cap.y = args.cap.y;
cap.x = gain_inverse(
args.cap.y,
args.exponent_power,
scale);
constant = integration_constant(
cap.x,
cap.y,
base_fn(cap.x, scale, args));
}
break;
}
}
double operator()(double speed, const accel_args& args) const
{
if (speed < cap.x) {
return base_fn(speed, scale, args);
}
else {
return cap.y + constant / speed;
}
}
double static gain_inverse(double gain, double power, double scale)
{
return pow(gain / (power + 1), 1 / power) / scale;
}
double static gain(double input, double power, double scale)
{
return (power + 1) * pow(input * scale, power);
}
double static scale_from_gain_point(double input, double gain, double power)
{
return pow(gain / (power + 1), 1 / power) / input;
}
double static integration_constant(double input, double gain, double output)
{
return (output - gain) * input;
}
};
}
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