introduce roundabout-turns into instruction set

2016-04-18 13:41:19 +02:00
parent 8d68d4c050
commit 1544a08ea2
19 changed files with 791 additions and 141 deletions
@@ -0,0 +1,48 @@
+#ifndef OSRM_UTIL_GUIDANCE_TOOLKIT_HPP_
+#define OSRM_UTIL_GUIDANCE_TOOLKIT_HPP_
+
+/* A set of tools required for guidance in both pre and post-processing */
+
+#include "extractor/guidance/turn_instruction.hpp"
+
+namespace osrm
+{
+namespace util
+{
+namespace guidance
+{
+
+inline double angularDeviation(const double angle, const double from)
+{
+    const double deviation = std::abs(angle - from);
+    return std::min(360 - deviation, deviation);
+}
+
+inline extractor::guidance::DirectionModifier getTurnDirection(const double angle)
+{
+    // An angle of zero is a u-turn
+    // 180 goes perfectly straight
+    // 0-180 are right turns
+    // 180-360 are left turns
+    if (angle > 0 && angle < 60)
+        return extractor::guidance::DirectionModifier::SharpRight;
+    if (angle >= 60 && angle < 140)
+        return extractor::guidance::DirectionModifier::Right;
+    if (angle >= 140 && angle < 170)
+        return extractor::guidance::DirectionModifier::SlightRight;
+    if (angle >= 165 && angle <= 195)
+        return extractor::guidance::DirectionModifier::Straight;
+    if (angle > 190 && angle <= 220)
+        return extractor::guidance::DirectionModifier::SlightLeft;
+    if (angle > 220 && angle <= 300)
+        return extractor::guidance::DirectionModifier::Left;
+    if (angle > 300 && angle < 360)
+        return extractor::guidance::DirectionModifier::SharpLeft;
+    return extractor::guidance::DirectionModifier::UTurn;
+}
+
+} /* namespace guidance */
+} /* namespace util */
+} /* namespace osrm */
+
+#endif /* OSRM_UTIL_GUIDANCE_TOOLKIT_HPP_ */