1 files changed, 41 insertions, 0 deletions
diff --git a/game/vehicles/linkHistory.cpp b/game/vehicles/linkHistory.cpp
new file mode 100644
index 0000000..4fac4ba
--- /dev/null
+++ b/game/vehicles/linkHistory.cpp
@@ -0,0 +1,41 @@
+#include "linkHistory.h"
+#include "game/network/link.h"
+#include <memory>
+
+LinkHistory::Entry
+LinkHistory::add(const LinkWPtr & l, unsigned char d)
+{
+	links.insert(links.begin(), {l, d});
+	const auto lp = l.lock();
+	totalLen += lp->length;
+	while (totalLen >= 1000.F && !links.empty()) {
+		totalLen -= links.back().first.lock()->length;
+		links.pop_back();
+	}
+	return {lp, d};
+}
+
+LinkHistory::Entry
+LinkHistory::getCurrent() const
+{
+	return {links.front().first.lock(), links.front().second};
+}
+
+LinkHistory::Entry
+LinkHistory::getAt(float len, float * rem) const
+{
+	auto litr = links.begin();
+	while (len > 0.F && litr != links.end()) {
+		litr++;
+		if (litr != links.end()) {
+			len -= litr->first.lock()->length;
+		}
+	}
+	if (litr == links.end()) {
+		litr--;
+	}
+	if (rem) {
+		*rem = -len;
+	}
+	return {litr->first.lock(), litr->second};
+}