Unify interpolation function.

src/fmri/utils.cpp

@@ -1,3 +1,4 @@
+#include <caffe/util/math_functions.hpp>
 #include "utils.hpp"
 
 const float fmri::LAYER_X_OFFSET = -10;
@@ -14,3 +15,12 @@ std::default_random_engine &fmri::rng()
 
     return rng;
 }
+
+std::vector<float> fmri::animate(const std::vector<float> &start, const std::vector<float> &delta, float time)
+{
+    auto vertexBuffer = delta;
+    caffe::caffe_scal(vertexBuffer.size(), time, vertexBuffer.data());
+    caffe::caffe_add(start.size(), vertexBuffer.data(), start.data(), vertexBuffer.data());
+
+    return vertexBuffer;
+}