From f869d984d44bb6f221ed10c644e3f0f0df9697d8 Mon Sep 17 00:00:00 2001
From: Huy Nguyen <me@huy.dev>
Date: Sat, 18 Apr 2020 04:31:48 -0400
Subject: [PATCH 1/3] Fix test bed

Adapted from https://github.com/kripken/box2d.js/issues/87#issuecomment-304304620.
---
 demo/html5canvas/testbed.html |  3 +++
 helpers/embox2d-helpers.js    | 12 ++++++------
 2 files changed, 9 insertions(+), 6 deletions(-)

diff --git a/demo/html5canvas/testbed.html b/demo/html5canvas/testbed.html
index e27c6e5..903a4d7 100755
--- a/demo/html5canvas/testbed.html
+++ b/demo/html5canvas/testbed.html
@@ -21,6 +21,9 @@
         <script type="text/javascript">  
             var Box2D;
             if (!Box2D) Box2D = (typeof Box2D !== 'undefined' ? Box2D : null) || Module;
+            var Box2DConstructor = Box2D
+            Box2D = Box2D()
+            Module = Box2D
             window.onload = function() {
                 using(Box2D, "b2.+")
                 init();
diff --git a/helpers/embox2d-helpers.js b/helpers/embox2d-helpers.js
index aedbcc2..d2eed64 100755
--- a/helpers/embox2d-helpers.js
+++ b/helpers/embox2d-helpers.js
@@ -42,11 +42,11 @@ function scaledVec2(vec, scale) {
 // http://stackoverflow.com/questions/12792486/emscripten-bindings-how-to-create-an-accessible-c-c-array-from-javascript
 function createChainShape(vertices, closedLoop) {
     var shape = new Box2D.b2ChainShape();            
-    var buffer = Box2D.allocate(vertices.length * 8, 'float', Box2D.ALLOC_STACK);
+    var buffer = Box2D._malloc(vertices.length * 8);
     var offset = 0;
     for (var i=0;i<vertices.length;i++) {
-        Box2D.setValue(buffer+(offset), vertices[i].get_x(), 'float'); // x
-        Box2D.setValue(buffer+(offset+4), vertices[i].get_y(), 'float'); // y
+        Box2D.HEAPF32[buffer + offset >> 2] = vertices[i].get_x();
+        Box2D.HEAPF32[buffer + (offset + 4) >> 2] = vertices[i].get_y();
         offset += 8;
     }            
     var ptr_wrapped = Box2D.wrapPointer(buffer, Box2D.b2Vec2);
@@ -59,11 +59,11 @@ function createChainShape(vertices, closedLoop) {
 
 function createPolygonShape(vertices) {
     var shape = new Box2D.b2PolygonShape();            
-    var buffer = Box2D.allocate(vertices.length * 8, 'float', Box2D.ALLOC_STACK);
+    var buffer = Box2D._malloc(vertices.length * 8);
     var offset = 0;
     for (var i=0;i<vertices.length;i++) {
-        Box2D.setValue(buffer+(offset), vertices[i].get_x(), 'float'); // x
-        Box2D.setValue(buffer+(offset+4), vertices[i].get_y(), 'float'); // y
+        Box2D.HEAPF32[buffer + offset >> 2] = vertices[i].get_x();
+        Box2D.HEAPF32[buffer + (offset + 4) >> 2] = vertices[i].get_y();
         offset += 8;
     }            
     var ptr_wrapped = Box2D.wrapPointer(buffer, Box2D.b2Vec2);

From e90f144df81f5e5aa79c6c9eae2190bdcbad371d Mon Sep 17 00:00:00 2001
From: Huy Nguyen <me@huy.dev>
Date: Mon, 1 Jun 2020 16:27:13 -0400
Subject: [PATCH 2/3] Add semicolons to each line

---
 demo/html5canvas/testbed.html | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/demo/html5canvas/testbed.html b/demo/html5canvas/testbed.html
index 903a4d7..52e8015 100755
--- a/demo/html5canvas/testbed.html
+++ b/demo/html5canvas/testbed.html
@@ -21,9 +21,9 @@
         <script type="text/javascript">  
             var Box2D;
             if (!Box2D) Box2D = (typeof Box2D !== 'undefined' ? Box2D : null) || Module;
-            var Box2DConstructor = Box2D
-            Box2D = Box2D()
-            Module = Box2D
+            var Box2DConstructor = Box2D;
+            Box2D = Box2D();
+            Module = Box2D;
             window.onload = function() {
                 using(Box2D, "b2.+")
                 init();

From 8d2ad414f627b68719efd7a6ca17b972dfdc843a Mon Sep 17 00:00:00 2001
From: Huy Nguyen <me@huy.dev>
Date: Mon, 1 Jun 2020 16:29:39 -0400
Subject: [PATCH 3/3] Remove unused variable

---
 demo/html5canvas/testbed.html | 1 -
 1 file changed, 1 deletion(-)

diff --git a/demo/html5canvas/testbed.html b/demo/html5canvas/testbed.html
index 52e8015..da27762 100755
--- a/demo/html5canvas/testbed.html
+++ b/demo/html5canvas/testbed.html
@@ -21,7 +21,6 @@
         <script type="text/javascript">  
             var Box2D;
             if (!Box2D) Box2D = (typeof Box2D !== 'undefined' ? Box2D : null) || Module;
-            var Box2DConstructor = Box2D;
             Box2D = Box2D();
             Module = Box2D;
             window.onload = function() {