From 30e3c9625856c24fa88ec148da6865657414c77d Mon Sep 17 00:00:00 2001
From: Dan Goodliffe <dan@randomdan.homeip.net>
Date: Sun, 7 Feb 2021 11:32:15 +0000
Subject: Links have length, ends have entry direction

---
 game/network/rail.h | 23 +++++++++++++++++------
 1 file changed, 17 insertions(+), 6 deletions(-)

(limited to 'game/network/rail.h')

diff --git a/game/network/rail.h b/game/network/rail.h
index 7e1f5ac..3ab0c83 100644
--- a/game/network/rail.h
+++ b/game/network/rail.h
@@ -10,6 +10,7 @@
 #include <glm/glm.hpp>
 #include <memory>
 #include <set>
+#include <utility>
 #include <vector>
 class Shader;
 class Texture;
@@ -22,7 +23,6 @@ public:
 	void render(const Shader &) const override;
 
 protected:
-	RailLink();
 	Collection<Mesh, false> meshes;
 	std::vector<Vertex> vertices;
 	std::vector<unsigned int> indices;
@@ -30,15 +30,20 @@ protected:
 
 class RailLinkStraight : public RailLink {
 public:
-	RailLinkStraight(End, End);
+	RailLinkStraight(const NodePtr &, const NodePtr &);
+
+private:
+	RailLinkStraight(NodePtr, NodePtr, const glm::vec3 & diff);
 };
 
+using Arc = std::pair<float, float>;
 class RailLinkCurve : public RailLink {
 public:
-	RailLinkCurve(End, End, glm::vec2);
+	RailLinkCurve(const NodePtr &, const NodePtr &, glm::vec2);
 
 private:
-	glm::vec2 centre;
+	RailLinkCurve(const NodePtr &, const NodePtr &, glm::vec3, const Arc);
+	glm::vec3 centreBase;
 };
 
 template<typename T> concept RailLinkConcept = std::is_base_of_v<RailLink, T>;
@@ -46,8 +51,14 @@ template<typename T> concept RailLinkConcept = std::is_base_of_v<RailLink, T>;
 class RailLinks : public Renderable, public WorldObject {
 public:
 	RailLinks();
-	template<RailLinkConcept T> std::shared_ptr<T> addLink(glm::vec3, glm::vec3);
-	template<RailLinkConcept T> std::shared_ptr<T> addLink(glm::vec3, glm::vec3, glm::vec2);
+	template<RailLinkConcept T, typename... Params>
+	std::shared_ptr<T>
+	addLink(glm::vec3 a, glm::vec3 b, Params &&... params)
+	{
+		const auto node1 = *nodes.insert(std::make_shared<Node>(a)).first;
+		const auto node2 = *nodes.insert(std::make_shared<Node>(b)).first;
+		return links.create<T>(node1, node2, std::forward<Params>(params)...);
+	}
 
 private:
 	using Nodes = std::set<NodePtr, PtrSorter<NodePtr>>;
-- 
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