From ac67ef8e5ce5554ac4fed480069a4c3b7ae09a1b Mon Sep 17 00:00:00 2001
From: liabru <liabru@brm.io>
Date: Wed, 28 Jun 2017 00:21:17 +0100
Subject: [PATCH] fixed various constraints in examples

---
 examples/chains.js         |  4 ++--
 examples/doublePendulum.js | 14 ++++++++------
 src/factory/Composites.js  | 12 +++---------
 3 files changed, 13 insertions(+), 17 deletions(-)

diff --git a/examples/chains.js b/examples/chains.js
index c019b9d7..91b08b2e 100644
--- a/examples/chains.js
+++ b/examples/chains.js
@@ -43,7 +43,7 @@ Example.chains = function() {
         return Bodies.rectangle(x, y, 50, 20, { collisionFilter: { group: group } });
     });
     
-    Composites.chain(ropeA, 0.5, 0, -0.5, 0, { stiffness: 0.8, length: 2 });
+    Composites.chain(ropeA, 0.5, 0, -0.5, 0, { stiffness: 0.8, length: 2, render: { type: 'line' } });
     Composite.add(ropeA, Constraint.create({ 
         bodyB: ropeA.bodies[0],
         pointB: { x: -25, y: 0 },
@@ -57,7 +57,7 @@ Example.chains = function() {
         return Bodies.circle(x, y, 20, { collisionFilter: { group: group } });
     });
     
-    Composites.chain(ropeB, 0.5, 0, -0.5, 0, { stiffness: 0.8, length: 2 });
+    Composites.chain(ropeB, 0.5, 0, -0.5, 0, { stiffness: 0.8, length: 2, render: { type: 'line' } });
     Composite.add(ropeB, Constraint.create({ 
         bodyB: ropeB.bodies[0],
         pointB: { x: -20, y: 0 },
diff --git a/examples/doublePendulum.js b/examples/doublePendulum.js
index bef69584..70dec159 100644
--- a/examples/doublePendulum.js
+++ b/examples/doublePendulum.js
@@ -42,7 +42,7 @@ Example.doublePendulum = function() {
         length = 200,
         width = 25;
         
-    var pendulum = Composites.stack(350, 160, 2, 1, 0, 0, function(x, y) {
+    var pendulum = Composites.stack(350, 160, 2, 1, -20, 0, function(x, y) {
         return Bodies.rectangle(x, y, length, width, { 
             collisionFilter: { group: group },
             frictionAir: 0,
@@ -56,24 +56,26 @@ Example.doublePendulum = function() {
 
     pendulum.bodies[0].render.strokeStyle = '#4a485b';
     pendulum.bodies[1].render.strokeStyle = '#4a485b';
+
+    world.gravity.scale = 0.002;
     
-    Composites.chain(pendulum, 0.5, 0, -0.5, 0, { 
+    Composites.chain(pendulum, 0.45, 0, -0.45, 0, { 
         stiffness: 1, 
         length: 0,
         angularStiffness: 0.7,
         render: {
-            lineWidth: 0
+            strokeStyle: '#4a485b'
         }
     });
     
     Composite.add(pendulum, Constraint.create({ 
         bodyB: pendulum.bodies[0],
-        pointB: { x: -length * 0.5, y: 0 },
-        pointA: { x: pendulum.bodies[0].position.x - length * 0.5, y: pendulum.bodies[0].position.y },
+        pointB: { x: -length * 0.42, y: 0 },
+        pointA: { x: pendulum.bodies[0].position.x - length * 0.42, y: pendulum.bodies[0].position.y },
         stiffness: 1,
         length: 0,
         render: {
-            lineWidth: 0
+            strokeStyle: '#4a485b'
         }
     }));
 
diff --git a/src/factory/Composites.js b/src/factory/Composites.js
index 7ef9f3f4..3c9adf76 100644
--- a/src/factory/Composites.js
+++ b/src/factory/Composites.js
@@ -274,10 +274,7 @@ var Bodies = require('./Bodies');
             pointB: { x: wheelAOffset, y: wheelYOffset },
             bodyA: wheelA,
             stiffness: 1,
-            length: 0,
-            render: {
-                lineWidth: 0
-            }
+            length: 0
         });
                         
         var axelB = Constraint.create({
@@ -285,10 +282,7 @@ var Bodies = require('./Bodies');
             pointB: { x: wheelBOffset, y: wheelYOffset },
             bodyA: wheelB,
             stiffness: 1,
-            length: 0,
-            render: {
-                lineWidth: 0
-            }
+            length: 0
         });
         
         Composite.addBody(car, body);
@@ -317,7 +311,7 @@ var Bodies = require('./Bodies');
      */
     Composites.softBody = function(xx, yy, columns, rows, columnGap, rowGap, crossBrace, particleRadius, particleOptions, constraintOptions) {
         particleOptions = Common.extend({ inertia: Infinity }, particleOptions);
-        constraintOptions = Common.extend({ stiffness: 0.2 }, constraintOptions);
+        constraintOptions = Common.extend({ stiffness: 0.2, render: { type: 'line', anchors: false } }, constraintOptions);
 
         var softBody = Composites.stack(xx, yy, columns, rows, columnGap, rowGap, function(x, y) {
             return Bodies.circle(x, y, particleRadius, particleOptions);