From: Mikko Rasa <tdb@tdb.fi>
Date: Thu, 10 Apr 2014 23:06:18 +0000 (+0300)
Subject: Use the endpoint closest to the pointer when placing trains
X-Git-Url: http://git.tdb.fi/?p=r2c2.git;a=commitdiff_plain;h=dfd78df0c79d03404d1f2e70c08b643655455725

Use the endpoint closest to the pointer when placing trains
---

diff --git a/source/engineer/controlpanel.cpp b/source/engineer/controlpanel.cpp
index 0ca2d97..c2938cd 100644
--- a/source/engineer/controlpanel.cpp
+++ b/source/engineer/controlpanel.cpp
@@ -109,12 +109,27 @@ void ControlPanel::pointer_motion(int x, int y)
 		int ry = y;
 		map_coords_to_ancestor(rx, ry, *find_ancestor<GLtk::Root>());
 		Ray ray = engineer.get_main_view().create_ray(rx, ry);
+		Vector ground = ray.get_start()-ray.get_direction()*ray.get_start().z/ray.get_direction().z;
 		Track *track = engineer.get_layout().pick<Track>(ray);
 		if(track)
 		{
-			place_location = TrackIter(track, 0).block_iter();
-			if(place_location)
+			const vector<Block::Endpoint> &eps = track->get_block().get_endpoints();
+			int closest_ep = -1;
+			float closest_dist = -1;
+			for(unsigned i=0; i<eps.size(); ++i)
 			{
+				Snap sn = eps[i].track->get_snap_node(eps[i].track_ep);
+				float d = (sn.position-ground).norm();
+				if(d<closest_dist || closest_dist<0)
+				{
+					closest_ep = i;
+					closest_dist = d;
+				}
+			}
+
+			if(closest_ep>=0)
+			{
+				place_location = BlockIter(&track->get_block(), closest_ep);
 				ghosts.back()->place(place_location.track_iter());
 				for(unsigned i=ghosts.size()-1; i--; )
 					ghosts[i]->place_before(*ghosts[i+1]);