From d7587defa3cedd6e7ea6d0623aa8cd0f6b27819c Mon Sep 17 00:00:00 2001
From: Dan Goodliffe <dan@randomdan.homeip.net>
Date: Sun, 2 Oct 2022 18:16:27 +0100
Subject: Add support for searching a network for a ray intersection

---
 game/network/network.cpp | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

(limited to 'game/network/network.cpp')

diff --git a/game/network/network.cpp b/game/network/network.cpp
index f59fe1e..775d420 100644
--- a/game/network/network.cpp
+++ b/game/network/network.cpp
@@ -5,7 +5,9 @@
 #include <filesystem>
 #include <game/network/link.h>
 #include <gfx/models/texture.h>
+#include <glm/gtx/intersect.hpp>
 #include <initializer_list>
+#include <ray.hpp>
 #include <stdexcept>
 #include <utility>
 
@@ -33,6 +35,21 @@ Network::findNodeAt(glm::vec3 pos) const
 	return {};
 }
 
+Network::IntersectRayResult
+Network::intersectRay(const Ray & ray) const
+{
+	// Click within 2m of a node
+	if (const auto node = std::find_if(nodes.begin(), nodes.end(),
+				[&ray](const NodePtr & node) {
+					glm::vec3 ipos, inorm;
+					return glm::intersectRaySphere(ray.start, ray.direction, node->pos, 2.F, ipos, inorm);
+				});
+			node != nodes.end()) {
+		return *node;
+	}
+	return intersectRayLinks(ray);
+}
+
 void
 Network::joinLinks(const LinkPtr & l, const LinkPtr & ol)
 {
-- 
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