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#pragma once
namespace rawaccel {
/// <summary> Struct to hold arguments for an acceleration function. </summary>
struct accel_args {
double offset = 0;
double accel = 0;
double limit = 2;
double exponent = 2;
double midpoint = 0;
double power_scale = 1;
double power_exp = 0.05;
double weight = 1;
double rate = 0;
double scale_cap = 0;
double gain_cap = 0;
};
template <typename Func>
struct accel_val_base {
double offset = 0;
double weight = 1;
Func fn;
accel_val_base(const accel_args& args) : fn(args) {}
};
template <typename Func>
struct additive_accel : accel_val_base<Func> {
additive_accel(const accel_args& args) : accel_val_base(args) {
offset = args.offset;
weight = args.weight;
}
inline double operator()(double speed) const {
double offset_speed = speed - offset;
return offset_speed > 0 ? 1 + fn(offset_speed) * weight : 1;
}
};
template <typename Func>
struct nonadditive_accel : accel_val_base<Func> {
nonadditive_accel(const accel_args& args) : accel_val_base(args) {
if (args.weight != 0) weight = args.weight;
}
inline double operator()(double speed) const {
return fn(speed) * weight;
}
};
}
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