init

lib/engine/rs.cpp

@@ -0,0 +1,51 @@
+#include<iostream>
+#include<vector>
+#include<utility>
+#include<climits>
+#include "rs.h"
+
+RS2::LineWidth RS2::intToLineWidth(int w) {
+	std::vector<std::pair<int, LineWidth>> const table{
+		{-2, WidthDefault}, //for w = -3
+		{-1, WidthByBlock}, //for w = -2
+		{0, WidthByLayer}, //for w = -1
+		// for w < 3, return Width00
+		{3, Width00},
+		{8, Width01},
+		{12, Width02},
+		{14, Width03},
+		{17, Width04},
+		{19, Width05},
+		{23, Width06},
+		{28, Width07},
+		{33, Width08},
+		{38, Width09},
+		{46, Width10},
+		{52, Width11},
+		{57, Width12},
+		{66, Width13},
+		{76, Width14},
+		{86, Width15},
+		{96, Width16},
+		{104, Width17},
+		{114, Width18},
+		{131, Width19},
+		{150, Width20},
+		{180, Width21},
+		{206, Width22},
+		{INT_MAX, Width23}
+	};
+
+	//binary search
+	//assume table size is at least 2
+	size_t low = -1;
+	size_t high = table.size() - 1;
+	while (low + 1 < high) {
+		size_t const mid = low + (high - low)/2;
+		if (w >= table.at(mid).first)
+			low = mid;
+		else
+			high = mid;
+	}
+	return table.at(high).second;
+}