From 71f67c99ccbd401810bcaa79ca8a736dfa28da90 Mon Sep 17 00:00:00 2001
From: "Anthony J. Thibault" <tony@highfidelity.io>
Date: Tue, 26 Apr 2016 13:43:03 -0700
Subject: [PATCH] MyAvatar: use coneSphereAngle for eyeTracking look at targets

---
 interface/src/avatar/MyAvatar.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/interface/src/avatar/MyAvatar.cpp b/interface/src/avatar/MyAvatar.cpp
index 9a61c00712..2c4b8da5e1 100644
--- a/interface/src/avatar/MyAvatar.cpp
+++ b/interface/src/avatar/MyAvatar.cpp
@@ -911,7 +911,8 @@ void MyAvatar::updateLookAtTargetAvatar() {
         avatar->setIsLookAtTarget(false);
         if (!avatar->isMyAvatar() && avatar->isInitialized() &&
             (distanceTo < GREATEST_LOOKING_AT_DISTANCE * getUniformScale())) {
-            float angleTo = glm::angle(lookForward, glm::normalize(avatar->getHead()->getEyePosition() - getHead()->getEyePosition()));
+            float radius = glm::length(avatar->getHead()->getEyePosition() - avatar->getHead()->getRightEyePosition());
+            float angleTo = coneSphereAngle(getHead()->getEyePosition(), lookForward, avatar->getHead()->getEyePosition(), radius);
             if (angleTo < (smallestAngleTo * (isCurrentTarget ? KEEP_LOOKING_AT_CURRENT_ANGLE_FACTOR : 1.0f))) {
                 _lookAtTargetAvatar = avatarPointer;
                 _targetAvatarPosition = avatarPointer->getPosition();