interpolate.hpp

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#ifndef EAGINE_MATH_INTERPOLATE_HPP
#define EAGINE_MATH_INTERPOLATE_HPP
 
#include "constants.hpp"
#include "functions.hpp"
 
#ifdef __clang__
EAGINE_DIAG_PUSH()
EAGINE_DIAG_OFF(double-promotion)
#endif
 
namespace eagine::math {
//------------------------------------------------------------------------------
template <typename T, typename C>
static inline auto interpolate_linear(const T& a, const T& b, C coef) {
    return T((1 - coef) * a + coef * b);
}
//------------------------------------------------------------------------------
template <typename T, typename C>
static inline auto lerp(const T& a, const T& b, C coef) {
    return interpolate_linear(a, b, coef);
}
//------------------------------------------------------------------------------
template <typename T, typename C>
static inline auto smooth_lerp(const T& a, const T& b, C coef) {
    return lerp(a, b, sine_sigmoid01(coef));
}
//------------------------------------------------------------------------------
template <typename T, typename C>
static inline auto smooth_oscillate(const T& a, C coef) {
    return smooth_lerp(-a, a, coef);
}
//------------------------------------------------------------------------------
} // namespace eagine::math
 
#ifdef __clang__
EAGINE_DIAG_POP()
#endif
 
#endif // EAGINE_MATH_INTERPOLATE_HPP