From 63f7f8b0bc17795364fa72d34cd6ac7d71203cbe Mon Sep 17 00:00:00 2001
From: Paul Masson <paulmasson@comcast.net>
Date: Tue, 8 May 2018 13:54:35 -0700
Subject: [PATCH] Add collision handling

---
 examples/webvr_gearvr.html | 30 ++++++++++++++++++++++++++++--
 1 file changed, 28 insertions(+), 2 deletions(-)

diff --git a/examples/webvr_gearvr.html b/examples/webvr_gearvr.html
index 5b03ed81d3..bd617229fd 100644
--- a/examples/webvr_gearvr.html
+++ b/examples/webvr_gearvr.html
@@ -42,6 +42,10 @@
 			var controller;
 
 			var room;
+			
+			var radius = 0.08;
+			var normal = new THREE.Vector3();
+			var relativeVelocity = new THREE.Vector3();
 
 			init();
 			animate();
@@ -77,7 +81,7 @@
 				light.position.set( 1, 1, 1 ).normalize();
 				scene.add( light );
 
-				var geometry = new THREE.IcosahedronBufferGeometry( 0.08, 2 );
+				var geometry = new THREE.IcosahedronBufferGeometry( radius, 2 );
 
 				for ( var i = 0; i < 200; i ++ ) {
 
@@ -187,7 +191,7 @@
 
 				// keep cubes inside room
 
-				var range = 3 - 0.08;
+				var range = 3 - radius;
 
 				for ( var i = 0; i < room.children.length; i ++ ) {
 
@@ -218,6 +222,28 @@
 						cube.userData.velocity.z = - cube.userData.velocity.z;
 
 					}
+					
+					for ( var j = i + 1; j < room.children.length; j ++ ) {
+						
+						var cube2 = room.children[ j ];
+						
+						normal.copy( cube.position ).sub( cube2.position );
+						
+						if ( normal.length() < 2 * radius ) {
+							
+							normal.normalize();
+
+							relativeVelocity.copy( cube.userData.velocity ).sub( cube2.userData.velocity );
+							var dot = relativeVelocity.dot( normal );
+
+							normal = normal.multiplyScalar( dot );
+
+							cube.userData.velocity.sub( normal );
+							cube2.userData.velocity.add( normal );
+
+						}
+						
+					}
 
 					cube.userData.velocity.y -= 0.00098;
 
-- 
GitLab