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maths/fast: add minimal explanation of estrin function

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Danny Robson 2021-05-12 15:29:12 +10:00
parent 15ee2f5f58
commit 41f444a943
1 changed files with 2 additions and 0 deletions
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maths/fast.hpp
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@ -12,6 +12,8 @@
#include "../debug/assert.hpp" #include "../debug/assert.hpp"
namespace cruft::maths::fast { namespace cruft::maths::fast {
// computes: a + t * b + t^2 * c + t^3 * d, but hopefully a little more
// efficiently than typing out the above directly.
constexpr float constexpr float
estrin (float t, float a, float b, float c, float d) estrin (float t, float a, float b, float c, float d)
{ {