Hello,
I have written an MD2 3d mesh loader, everything works fine except for
the animations.
Because the model save only the key frame for each animation the
loader must interpolate the vertex position of the mesh to get a
smooth animation.
My solution was to save the triangles vertices in a gl-array for each
frame an then doing linear interpolation, something like that:
(defun lerp-gl-array (a b c count interpolation-factor)
(dotimes (i count)
(setf (gl:glaref c i)
(alexandria:lerp interpolation-factor (gl:glaref a i) (gl:glaref b i)))))
but it seem to be too slow as shown by the SBCL profiler
seconds | gc | consed | calls | sec/call | name
-----------------------------------------------------------
264.554 | 8.189 | 8,307,049,792 | 2,870 | 0.092179 | CL-GL-UTILS:LERP-GL-ARRAY
-----------------------------------------------------------
264.554 | 8.189 | 8,307,049,792 | 2,870 | | Total
is this my fault? Any idea how can I improve performance?
Thank you.
C.
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