From 920ae293f6830833146a524345dfbf00669e785b Mon Sep 17 00:00:00 2001
From: Dan Goodliffe <dan@randomdan.homeip.net>
Date: Sat, 8 Oct 2022 18:40:58 +0100
Subject: Add a rather dumb builder for joining nodes

---
 game/network/network.h      |  2 ++
 game/network/network.impl.h |  7 +++++++
 ui/builders/join.cpp        | 43 +++++++++++++++++++++++++++++++++++++++++++
 ui/builders/join.h          | 15 +++++++++++++++
 ui/editNetwork.cpp          |  4 +++-
 5 files changed, 70 insertions(+), 1 deletion(-)
 create mode 100644 ui/builders/join.cpp
 create mode 100644 ui/builders/join.h

diff --git a/game/network/network.h b/game/network/network.h
index c795d86..9dbca7c 100644
--- a/game/network/network.h
+++ b/game/network/network.h
@@ -31,6 +31,7 @@ public:
 	[[nodiscard]] Link::Nexts routeFromTo(const Link::End &, const NodePtr &) const;
 
 	virtual LinkPtr addStraight(glm::vec3, glm::vec3) = 0;
+	virtual LinkPtr addJoins(glm::vec3, glm::vec3) = 0;
 
 protected:
 	static void joinLinks(const LinkPtr & l, const LinkPtr & ol);
@@ -63,6 +64,7 @@ public:
 	}
 
 	LinkPtr addStraight(glm::vec3 n1, glm::vec3 n2) override;
+	LinkPtr 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 f4466b7..37d03f8 100644
--- a/game/network/network.impl.h
+++ b/game/network/network.impl.h
@@ -43,3 +43,10 @@ NetworkOf<T>::addStraight(glm::vec3 n1, glm::vec3 n2)
 {
 	return addLink<typename T::StraightLink>(n1, n2);
 }
+
+template<typename T>
+LinkPtr
+NetworkOf<T>::addJoins(glm::vec3 n1, glm::vec3 n2)
+{
+	return addLink<typename T::StraightLink>(n1, n2);
+}
diff --git a/ui/builders/join.cpp b/ui/builders/join.cpp
new file mode 100644
index 0000000..90b1d61
--- /dev/null
+++ b/ui/builders/join.cpp
@@ -0,0 +1,43 @@
+#include "join.h"
+#include <game/geoData.h>
+
+void
+BuilderJoin::render(const Shader &) const
+{
+}
+
+std::string
+BuilderJoin::hint() const
+{
+	if (p1) {
+		return "Pick second node";
+	}
+	return "Pick first node";
+}
+
+void
+BuilderJoin::click(Network * network, const GeoData *, const SDL_MouseButtonEvent & e, const Ray & ray)
+{
+	switch (e.button) {
+		case SDL_BUTTON_LEFT:
+			if (const auto p = network->intersectRayNodes(ray)) {
+				if (p1) {
+					create(network, p1, p);
+					p1.reset();
+				}
+				else {
+					p1 = p;
+				}
+			}
+			return;
+		case SDL_BUTTON_MIDDLE:
+			p1.reset();
+			return;
+	}
+}
+
+void
+BuilderJoin::create(Network * network, const NodePtr & p1, const NodePtr & p2) const
+{
+	network->addJoins(p1->pos, p2->pos);
+}
diff --git a/ui/builders/join.h b/ui/builders/join.h
new file mode 100644
index 0000000..d4fb534
--- /dev/null
+++ b/ui/builders/join.h
@@ -0,0 +1,15 @@
+#pragma once
+#include "../editNetwork.h"
+
+class Network;
+class GeoData;
+
+class BuilderJoin : public EditNetwork::Builder {
+	void render(const Shader &) const override;
+	std::string hint() const override;
+	void click(Network * network, const GeoData * geoData, const SDL_MouseButtonEvent & e, const Ray & ray) override;
+
+	void create(Network * network, const NodePtr & p1, const NodePtr & p2) const;
+
+	NodePtr p1;
+};
diff --git a/ui/editNetwork.cpp b/ui/editNetwork.cpp
index a51d7fb..3ab7059 100644
--- a/ui/editNetwork.cpp
+++ b/ui/editNetwork.cpp
@@ -1,4 +1,5 @@
 #include "editNetwork.h"
+#include "builders/join.h"
 #include "builders/straight.h"
 #include "text.h"
 #include <game/gamestate.h>
@@ -7,6 +8,7 @@
 EditNetwork::EditNetwork(Network * n) :
 	network {n}, builderToolbar {
 						 {"ui/icon/network.png", mode.toggle<BuilderStraight>()},
+						 {"ui/icon/network.png", mode.toggle<BuilderJoin>()},
 				 }
 {
 }
@@ -16,7 +18,7 @@ EditNetwork::~EditNetwork() = default;
 bool
 EditNetwork::click(const SDL_MouseButtonEvent & e, const Ray & ray)
 {
-	if (builder) {
+	if (builder && (e.button == SDL_BUTTON_LEFT || e.button == SDL_BUTTON_MIDDLE)) {
 		builder->click(network, gameState->geoData.get(), e, ray);
 		return true;
 	}
-- 
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