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Fix cubic spline interpolation in glTF animations

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This commit is contained in:
Nikita Lisitsa 2024-10-15 21:40:18 +03:00
parent 8b5c35f89a
commit b5d556d06f
1 changed files with 4 additions and 3 deletions
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7
libs/gfx/include/psemek/gfx/gltf_animation.hpp
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@ -129,7 +129,8 @@ namespace psemek::gfx
auto i = it - input_.begin(); auto i = it - input_.begin();
float t = (time - input_[i - 1]) / (input_[i] - input_[i - 1]); float td = (input_[i] - input_[i - 1]);
float t = (time - input_[i - 1]) / td;
switch (interpolation_) switch (interpolation_)
{ {
@ -144,9 +145,9 @@ namespace psemek::gfx
float t3 = t * t2; float t3 = t * t2;
return traits::normalize(output_type::zero() return traits::normalize(output_type::zero()
+ output_[3 * (i - 1) + 1] * ( 2.f * t3 - 3.f * t2 + 1.f) + output_[3 * (i - 1) + 1] * ( 2.f * t3 - 3.f * t2 + 1.f)
+ output_[3 * (i - 1) + 2] * ( t3 - 2.f * t2 + t ) + output_[3 * (i - 1) + 2] * ( t3 - 2.f * t2 + t ) * td
+ output_[3 * (i + 0) + 1] * (- 2.f * t3 + 3.f * t2 ) + output_[3 * (i + 0) + 1] * (- 2.f * t3 + 3.f * t2 )
+ output_[3 * (i + 0) + 0] * ( t3 - t2 ) + output_[3 * (i + 0) + 0] * ( t3 - t2 ) * td
); );
} }
default: default: