separate all utility headers and sources

cosets/include/numeric.hpp

@@ -0,0 +1,24 @@
+#pragma once
+
+#include <glm/glm.hpp>
+#include <vector>
+#include <algorithm>
+
+glm::vec4 round(glm::vec4 f, int prec);
+
+float dot(int n, glm::vec4 a, glm::vec4 b);
+
+glm::vec4 project(glm::vec4 vec, glm::vec4 target);
+
+glm::vec4 reflect(glm::vec4 vec, glm::vec4 axis);
+
+glm::vec4 gram_schmidt_last(std::vector<glm::vec4> vecs);
+
+glm::vec4 barycentric(std::vector<glm::vec4> basis, std::vector<float> coords);
+
+std::vector<glm::vec4> plane_intersections(std::vector<glm::vec4> normals);
+
+
+std::vector<std::vector<int>> combinations(int N, int K);
+
+std::vector<std::vector<int>> combinations(std::vector<int> N, int K);