From ea8ae67d068fc5a1a2229e1ed17c795498024c71 Mon Sep 17 00:00:00 2001
From: Dan Goodliffe <dan@randomdan.homeip.net>
Date: Tue, 9 Mar 2021 00:28:33 +0000
Subject: Push link based movement into Vehicle

I think it's fair to make all vehicles uses links and nodes to navigate... even if those links, nodes are
private to that vehicle
---
 game/vehicles/vehicle.cpp | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)

(limited to 'game/vehicles/vehicle.cpp')

diff --git a/game/vehicles/vehicle.cpp b/game/vehicles/vehicle.cpp
index d3cae1d..db61564 100644
--- a/game/vehicles/vehicle.cpp
+++ b/game/vehicles/vehicle.cpp
@@ -5,6 +5,16 @@
 #include "game/objectives/freeroam.h"
 #include "game/orders.h"
 #include "game/vehicles/linkHistory.h"
+#include <algorithm>
+#include <array>
+#include <game/worldobject.h>
+#include <glm/glm.hpp>
+#include <iterator>
+#include <location.hpp>
+#include <maths.h>
+#include <random>
+#include <utility>
+#include <vector>
 
 Vehicle::Vehicle(const LinkPtr & l, float ld) : linkDist {ld}
 {
@@ -12,3 +22,27 @@ Vehicle::Vehicle(const LinkPtr & l, float ld) : linkDist {ld}
 	orders.create<FreeRoam>(&orders);
 	currentActivity = orders.current()->createActivity();
 }
+
+void
+Vehicle::move(TickDuration dur)
+{
+	static std::mt19937 gen(std::random_device {}());
+	linkDist += dur.count() * speed;
+	auto curLink {linkHist.getCurrent()};
+	while (linkDist > curLink.first->length) {
+		const auto location = curLink.first->positionAt(curLink.first->length, curLink.second);
+		auto nexts {curLink.first->nexts[1 - curLink.second]};
+		auto last = std::remove_if(nexts.begin(), nexts.end(), [ang = location.rot.y](const Link::Next & n) {
+			return std::abs(normalize(n.first.lock()->ends[n.second].second - ang)) > 0.1F;
+		});
+		if (last != nexts.begin()) {
+			auto off = std::uniform_int_distribution<>(0, std::distance(nexts.begin(), last) - 1)(gen);
+			linkDist -= curLink.first->length;
+			curLink = linkHist.add(nexts[off].first, nexts[off].second);
+		}
+		else {
+			linkDist = curLink.first->length;
+			speed = 0;
+		}
+	}
+}
-- 
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