first good build. Part, PartFrame, Matrix

MbDCode/SparseVector.h

@@ -0,0 +1,27 @@
+#pragma once
+#include <map>
+#include <cmath>
+
+namespace MbD {
+	template <typename T>
+	class SparseVector : public std::map<int, T>
+	{
+	public:
+		SparseVector() {}
+		SparseVector(std::initializer_list<std::pair<const int, T>> list) : std::map<int, T>{ list } {}
+		SparseVector(std::initializer_list<std::initializer_list<T>> list) {
+			for (auto pair : list) {
+				int i = 0;
+				int index;
+				T value;
+				for (auto element : pair) {
+					if (i == 0) index = (int)std::round(element); ;
+					if (i == 1) value = element;
+					i++;
+				}
+				this->insert(std::pair<const int, double>(index, value));
+			}
+		}
+	};
+}
+