From 576d5111a5747d1773c13439033754541b5d22d5 Mon Sep 17 00:00:00 2001
From: scrawl <scrawl@baseoftrash.de>
Date: Mon, 30 Nov 2015 17:04:45 +0100
Subject: [PATCH] Prefer Intersector::PROJECTION over Intersector::WINDOW

---
 apps/openmw/mwrender/characterpreview.cpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/apps/openmw/mwrender/characterpreview.cpp b/apps/openmw/mwrender/characterpreview.cpp
index 7ba8369dfc..e2ff08b6b5 100644
--- a/apps/openmw/mwrender/characterpreview.cpp
+++ b/apps/openmw/mwrender/characterpreview.cpp
@@ -269,7 +269,11 @@ namespace MWRender
 
     int InventoryPreview::getSlotSelected (int posX, int posY)
     {
-        osg::ref_ptr<osgUtil::LineSegmentIntersector> intersector (new osgUtil::LineSegmentIntersector(osgUtil::Intersector::WINDOW, posX, posY));
+        float projX = (posX / mCamera->getViewport()->width()) * 2 - 1.f;
+        float projY = (posY / mCamera->getViewport()->height()) * 2 - 1.f;
+        // With Intersector::WINDOW, the intersection ratios are slightly inaccurate. TODO: investigate
+        osg::ref_ptr<osgUtil::LineSegmentIntersector> intersector (new osgUtil::LineSegmentIntersector(osgUtil::Intersector::PROJECTION, projX, projY));
+
         intersector->setIntersectionLimit(osgUtil::LineSegmentIntersector::LIMIT_NEAREST);
         osgUtil::IntersectionVisitor visitor(intersector);
         visitor.setTraversalMode(osg::NodeVisitor::TRAVERSE_ACTIVE_CHILDREN);