Initial commit: Final state of the master project

Research/scene/Material/NearestFinder.h

@@ -0,0 +1,38 @@
+#pragma once
+#include <vector>
+#include <assert.h>
+#include "../../core/CollectionHelper.h"
+#include "../../inc/tbb/parallel_for.h"
+
+template<typename T>
+struct NearestFinder
+{
+	T operator()(const T& source, const std::vector<T>& values) const
+	{
+		assert(!values.empty());
+		float min = T::Distance(source, values[0]);
+		size_t minIndex = 0;
+		for (size_t i = 0; i < values.size(); i++)
+		{
+			float distance = T::Distance(source, values[i]);
+			if (distance < min)
+			{
+				min = distance;
+				minIndex = i;
+			}
+		}
+		return values[minIndex];
+	}
+};
+
+template<typename T>
+struct ParallelNearestFinder
+{
+	T operator()(const T& source, const std::vector<T>& values) const
+	{
+		assert(!values.empty());
+		std::vector<float> distances(values.size());
+		tbb::parallel_for(size_t(0), values.size(), [&](size_t i) { distances[i] = T::Distance(source, values[i]); });
+		return values[CollectionHelper::MinIndex(distances)];
+	}
+};