From 47ab9d322179b73f53e5cb5033b9b1f73d3df585 Mon Sep 17 00:00:00 2001
From: David Rowe <david@ctrlaltstudio.com>
Date: Thu, 28 Sep 2017 16:04:22 +1300
Subject: [PATCH] Fix flash of color from laser target when turn on or jump
 distance

---
 scripts/vr-edit/modules/laser.js | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/scripts/vr-edit/modules/laser.js b/scripts/vr-edit/modules/laser.js
index afd67cf364..39ce0b713b 100644
--- a/scripts/vr-edit/modules/laser.js
+++ b/scripts/vr-edit/modules/laser.js
@@ -44,6 +44,7 @@ Laser = function (side) {
 
         laserLength,
         specifiedLaserLength = null,
+        laserSphereSize = 0,
 
         LEFT_HAND = 0,
 
@@ -132,12 +133,16 @@ Laser = function (side) {
         } else {
             Overlays.editOverlay(laserLine, { visible: false });
         }
-        updateSphere(searchTarget, sphereSize, color, brightColor);
+        // Avoid flash from large laser sphere when turn on or suddenly increase distance. Rendering seems to update overlay 
+        // position one frame behind so use sphere size from preceding frame.
+        updateSphere(searchTarget, laserSphereSize, color, brightColor);
+        laserSphereSize = sphereSize;
     }
 
     function hide() {
         Overlays.editOverlay(laserLine, { visible: false });
         Overlays.editOverlay(laserSphere, { visible: false });
+        laserSphereSize = 0;
     }
 
     function setUIOverlays(overlayIDs) {