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Add geom::smoothstep & smootherstep

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This commit is contained in:
Nikita Lisitsa 2022-08-04 11:43:07 +03:00
parent 3ca9c8b16e
commit 48801a69da
2 changed files with 15 additions and 1 deletions
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4
libs/geom/include/psemek/geom/easing.hpp
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@ -1,5 +1,7 @@
#pragma once
#include <psemek/geom/math.hpp>
#include <psemek/util/assert.hpp>
namespace psemek::geom
@ -26,7 +28,7 @@ namespace psemek::geom
case easing_type::linear: return t;
case easing_type::quadratic_in: return t * t;
case easing_type::quadratic_out: return t * (2 - t);
case easing_type::cubic: return t * t * (3 - 2 * t);
case easing_type::cubic: return smoothstep(t);
default: assert(false);
}

12
libs/geom/include/psemek/geom/math.hpp
View file

@ -193,4 +193,16 @@ namespace psemek::geom
return false;
}
template <typename T>
T smoothstep(T x)
{
return x * x * (3 - 2 * x);
}
template <typename T>
T smootherstep(T x)
{
return x * x * x * (10 - x * (15 - 6 * x));
}
}