noise: templatise lerp functions
This commit is contained in:
parent
47423da841
commit
ebbc90c88d
@ -23,48 +23,88 @@
|
|||||||
|
|
||||||
|
|
||||||
//-----------------------------------------------------------------------------
|
//-----------------------------------------------------------------------------
|
||||||
double
|
template <typename T>
|
||||||
util::lerp::sigmoid (double val) {
|
T
|
||||||
return -1.0 + 2.0 / (1.0 + exp (-2.0 * val));
|
util::lerp::sigmoid (T val)
|
||||||
|
{
|
||||||
|
static_assert (std::is_floating_point<T>::value, "lerp is only defined for floating types");
|
||||||
|
return -1 + 2 / (1 + std::exp (-2 * val));
|
||||||
}
|
}
|
||||||
|
|
||||||
|
template float util::lerp::sigmoid (float);
|
||||||
|
template double util::lerp::sigmoid (double);
|
||||||
|
|
||||||
|
|
||||||
//-----------------------------------------------------------------------------
|
//-----------------------------------------------------------------------------
|
||||||
double util::lerp::trunc (double a, double, double)
|
template <typename T>
|
||||||
{ return a; }
|
T
|
||||||
|
util::lerp::trunc (T a, T, T)
|
||||||
|
{
|
||||||
|
static_assert (std::is_floating_point<T>::value, "lerp is only defined for floating types");
|
||||||
|
return a;
|
||||||
|
}
|
||||||
|
|
||||||
|
template float util::lerp::trunc (float, float, float);
|
||||||
|
template double util::lerp::trunc (double, double, double);
|
||||||
|
|
||||||
|
|
||||||
//-----------------------------------------------------------------------------
|
//-----------------------------------------------------------------------------
|
||||||
double
|
template <typename T>
|
||||||
util::lerp::linear (double a, double b, double weight) {
|
T
|
||||||
CHECK (weight >= 0.0 && weight <= 1.0);
|
util::lerp::linear (T a, T b, T weight)
|
||||||
return a * (1.0 - weight) + b * weight;
|
{
|
||||||
|
static_assert (std::is_floating_point<T>::value, "lerp is only defined for floating types");
|
||||||
|
CHECK (weight >= 0 && weight <= 1);
|
||||||
|
return a * (1 - weight) + b * weight;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
template float util::lerp::linear (float, float, float);
|
||||||
|
template double util::lerp::linear (double, double, double);
|
||||||
|
|
||||||
|
|
||||||
//-----------------------------------------------------------------------------
|
//-----------------------------------------------------------------------------
|
||||||
double
|
template <typename T>
|
||||||
util::lerp::cosine (double a, double b, double weight) {
|
T
|
||||||
CHECK (weight >= 0.0 && weight <= 1.0);
|
util::lerp::cosine (T a, T b, T weight)
|
||||||
double t = (1.0 - cos (weight * PI<double>)) * 0.5;
|
{
|
||||||
|
static_assert (std::is_floating_point<T>::value, "lerp is only defined for floating types");
|
||||||
|
CHECK (weight >= 0 && weight <= 1);
|
||||||
|
T t = (1 - std::cos (weight * PI<T>)) * T(0.5);
|
||||||
|
|
||||||
return a * (1.0 - t) + b * t;
|
return a * (1 - t) + b * t;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
template float util::lerp::cosine (float, float, float);
|
||||||
|
template double util::lerp::cosine (double, double, double);
|
||||||
|
|
||||||
|
|
||||||
//-----------------------------------------------------------------------------
|
//-----------------------------------------------------------------------------
|
||||||
double
|
template <typename T>
|
||||||
util::lerp::cubic (double a, double b, double weight) {
|
T
|
||||||
CHECK (weight >= 0.0 && weight <= 1.0);
|
util::lerp::cubic (T a, T b, T weight)
|
||||||
double t = weight * weight * (3.0 - 2.0 * weight);
|
{
|
||||||
return a * (1.0 - t) + b * t;
|
static_assert (std::is_floating_point<T>::value, "lerp is only defined for floating types");
|
||||||
|
CHECK (weight >= 0 && weight <= 1);
|
||||||
|
T t = weight * weight * (3 - 2 * weight);
|
||||||
|
return a * (1 - t) + b * t;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
template float util::lerp::cubic (float, float, float);
|
||||||
|
template double util::lerp::cubic (double, double, double);
|
||||||
|
|
||||||
|
|
||||||
//-----------------------------------------------------------------------------
|
//-----------------------------------------------------------------------------
|
||||||
double
|
template <typename T>
|
||||||
util::lerp::quintic (double a, double b, double weight) {
|
T
|
||||||
CHECK (weight >= 0.0 && weight <= 1.0);
|
util::lerp::quintic (T a, T b, T weight)
|
||||||
double t = weight * weight * weight * (weight * (weight * 6.0 - 15.0) + 10.0);
|
{
|
||||||
return a * (1.0 - t) + b * t;
|
static_assert (std::is_floating_point<T>::value, "lerp is only defined for floating types");
|
||||||
|
|
||||||
|
CHECK (weight >= 0 && weight <= 1);
|
||||||
|
T t = weight * weight * weight * (weight * (weight * 6 - 15) + 10);
|
||||||
|
return a * (1 - t) + b * t;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
|
||||||
|
template float util::lerp::quintic (float, float, float);
|
||||||
|
template double util::lerp::quintic (double, double, double);
|
||||||
|
@ -18,13 +18,13 @@
|
|||||||
#define __UTIL_NOISE_LERP_HPP
|
#define __UTIL_NOISE_LERP_HPP
|
||||||
|
|
||||||
namespace util { namespace lerp {
|
namespace util { namespace lerp {
|
||||||
double sigmoid (double val);
|
template <typename T> T sigmoid (T val);
|
||||||
|
|
||||||
double linear (double a, double b, double weight);
|
template <typename T> T linear (T a, T b, T weight);
|
||||||
double cosine (double a, double b, double weight);
|
template <typename T> T cosine (T a, T b, T weight);
|
||||||
double cubic (double a, double b, double weight);
|
template <typename T> T cubic (T a, T b, T weight);
|
||||||
double quintic (double a, double b, double weight);
|
template <typename T> T quintic (T a, T b, T weight);
|
||||||
double trunc (double a, double b, double weight);
|
template <typename T> T trunc (T a, T b, T weight);
|
||||||
} }
|
} }
|
||||||
|
|
||||||
#endif
|
#endif
|
||||||
|
Loading…
Reference in New Issue
Block a user