From 6a347439a76e265aa66fd3bcce6ff5665b8d8662 Mon Sep 17 00:00:00 2001
From: Dan Goodliffe <dan@randomdan.homeip.net>
Date: Fri, 14 Oct 2022 18:11:40 +0100
Subject: Network candidate links

Returns a collection of links/nodes without adding them to the network, suitable for displaying in the UI
during a design/build process
---
 game/network/network.h      | 19 +++++++++++++++----
 game/network/network.impl.h | 18 ++++++++++++++++--
 2 files changed, 31 insertions(+), 6 deletions(-)

(limited to 'game')

diff --git a/game/network/network.h b/game/network/network.h
index 60d9a02..773426e 100644
--- a/game/network/network.h
+++ b/game/network/network.h
@@ -31,7 +31,9 @@ public:
 	[[nodiscard]] Link::Nexts routeFromTo(const Link::End &, glm::vec3) const;
 	[[nodiscard]] Link::Nexts routeFromTo(const Link::End &, const Node::Ptr &) const;
 
-	virtual Link::CPtr addStraight(glm::vec3, glm::vec3) = 0;
+	virtual Link::CCollection candidateStraight(glm::vec3, glm::vec3) = 0;
+	virtual Link::CCollection candidateJoins(glm::vec3, glm::vec3) = 0;
+	virtual Link::CCollection addStraight(glm::vec3, glm::vec3) = 0;
 	virtual Link::CCollection addJoins(glm::vec3, glm::vec3) = 0;
 
 protected:
@@ -55,8 +57,15 @@ protected:
 public:
 	template<typename L, typename... Params>
 	std::shared_ptr<L>
-	addLink(glm::vec3 a, glm::vec3 b, Params &&... params)
-		requires std::is_base_of_v<T, L>
+	candidateLink(glm::vec3 a, glm::vec3 b, Params &&... params) requires std::is_base_of_v<T, L>
+	{
+		const auto node1 = candidateNodeAt(a).first, node2 = candidateNodeAt(b).first;
+		return std::make_shared<L>(node1, node2, std::forward<Params>(params)...);
+	}
+
+	template<typename L, typename... Params>
+	std::shared_ptr<L>
+	addLink(glm::vec3 a, glm::vec3 b, Params &&... params) requires std::is_base_of_v<T, L>
 	{
 		const auto node1 = nodeAt(a), node2 = nodeAt(b);
 		auto l {links.template create<L>(node1, node2, std::forward<Params>(params)...)};
@@ -64,7 +73,9 @@ public:
 		return l;
 	}
 
-	Link::CPtr addStraight(glm::vec3 n1, glm::vec3 n2) override;
+	Link::CCollection candidateStraight(glm::vec3 n1, glm::vec3 n2) override;
+	Link::CCollection candidateJoins(glm::vec3, glm::vec3) override;
+	Link::CCollection addStraight(glm::vec3 n1, glm::vec3 n2) override;
 	Link::CCollection addJoins(glm::vec3, glm::vec3) override;
 
 	void render(const Shader &) const override;
diff --git a/game/network/network.impl.h b/game/network/network.impl.h
index 68da5d9..6769320 100644
--- a/game/network/network.impl.h
+++ b/game/network/network.impl.h
@@ -38,10 +38,24 @@ NetworkOf<T>::intersectRayLinks(const Ray & ray) const
 }
 
 template<typename T>
-Link::CPtr
+Link::CCollection
+NetworkOf<T>::candidateStraight(glm::vec3 n1, glm::vec3 n2)
+{
+	return {candidateLink<typename T::StraightLink>(n1, n2)};
+}
+
+template<typename T>
+Link::CCollection
+NetworkOf<T>::candidateJoins(glm::vec3 n1, glm::vec3 n2)
+{
+	return {candidateLink<typename T::StraightLink>(n1, n2)};
+}
+
+template<typename T>
+Link::CCollection
 NetworkOf<T>::addStraight(glm::vec3 n1, glm::vec3 n2)
 {
-	return addLink<typename T::StraightLink>(n1, n2);
+	return {addLink<typename T::StraightLink>(n1, n2)};
 }
 
 template<typename T>
-- 
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