From 0d59b73de4e51a3a5b3c680f3dca97c2b942cc09 Mon Sep 17 00:00:00 2001
From: Dan Goodliffe <dan@randomdan.homeip.net>
Date: Fri, 14 Oct 2022 18:15:53 +0100
Subject: Builders manage a collection of candidate links rendered by the base
 builder

---
 ui/builders/join.cpp | 19 ++++++++++++++-----
 1 file changed, 14 insertions(+), 5 deletions(-)

(limited to 'ui/builders/join.cpp')

diff --git a/ui/builders/join.cpp b/ui/builders/join.cpp
index cc2ca2d..caa635f 100644
--- a/ui/builders/join.cpp
+++ b/ui/builders/join.cpp
@@ -1,11 +1,6 @@
 #include "join.h"
 #include <game/geoData.h>
 
-void
-BuilderJoin::render(const Shader &) const
-{
-}
-
 std::string
 BuilderJoin::hint() const
 {
@@ -15,6 +10,19 @@ BuilderJoin::hint() const
 	return "Pick first node";
 }
 
+void
+BuilderJoin::move(Network * network, const GeoData *, const SDL_MouseMotionEvent &, const Ray & ray)
+{
+	if (p1) {
+		if (const auto p = network->intersectRayNodes(ray)) {
+			candidateLinks.objects = network->candidateJoins(p1->pos, p->pos);
+		}
+		else {
+			candidateLinks.removeAll();
+		}
+	}
+}
+
 void
 BuilderJoin::click(Network * network, const GeoData *, const SDL_MouseButtonEvent & e, const Ray & ray)
 {
@@ -24,6 +32,7 @@ BuilderJoin::click(Network * network, const GeoData *, const SDL_MouseButtonEven
 				if (p1) {
 					create(network, p1, p);
 					p1.reset();
+					candidateLinks.removeAll();
 				}
 				else {
 					p1 = p;
-- 
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