Fixed typo in RectToTriangle and added in easy bounding box escape checks.

Author: photonstorm

v3/src/checksum.js

@@ -1,4 +1,4 @@
 var CHECKSUM = {
-build: 'e1a4b350-18c9-11e7-9368-79f8c4c534b2'
+build: '8a8de700-18cc-11e7-bc06-b1929cecfc5e'
 };
 module.exports = CHECKSUM;

v3/src/geom/intersects/RectangleToTriangle.js

@@ -6,6 +6,17 @@ var Decompose = require('../rectangle/Decompose');
 
 var RectangleToTriangle = function (rect, triangle)
 {
+    //  First the cheapest ones:
+
+    if (
+        triangle.left > rect.right ||
+        triangle.right < rect.left ||
+        triangle.top > rect.bottom ||
+        triangle.bottom < rect.top)
+    {
+        return false;
+    }
+
     var triA = triangle.getLineA();
     var triB = triangle.getLineB();
     var triC = triangle.getLineC();
@@ -17,17 +28,17 @@ var RectangleToTriangle = function (rect, triangle)
         return true;
     }
 
-    if (Contains(rect, triB.x1, triA.y1) || Contains(rect, triB.x2, triA.y2))
+    if (Contains(rect, triB.x1, triB.y1) || Contains(rect, triB.x2, triB.y2))
     {
         return true;
     }
 
-    if (Contains(rect, triC.x1, triA.y1) || Contains(rect, triC.x2, triA.y2))
+    if (Contains(rect, triC.x1, triC.y1) || Contains(rect, triC.x2, triC.y2))
     {
         return true;
     }
 
-    //  Cheap tests over, no to see if any of the lines intersect ...
+    //  Cheap tests over, now to see if any of the lines intersect ...
 
     var rectA = rect.getLineA();
     var rectB = rect.getLineB();

v3/src/geom/intersects/TriangleToCircle.js

@@ -4,6 +4,17 @@ var Contains = require('../triangle/Contains');
 
 var TriangleToCircle = function (triangle, circle)
 {
+     //  First the cheapest ones:
+
+    if (
+        triangle.left > circle.right ||
+        triangle.right < circle.left ||
+        triangle.top > circle.bottom ||
+        triangle.bottom < circle.top)
+    {
+        return false;
+    }
+
     if (Contains(triangle, circle))
     {
         return true;

v3/src/geom/intersects/TriangleToTriangle.js

@@ -5,6 +5,17 @@ var Decompose = require('../triangle/Decompose');
 
 var TriangleToTriangle = function (triangleA, triangleB)
 {
+    //  First the cheapest ones:
+
+    if (
+        triangleA.left > triangleB.right ||
+        triangleA.right < triangleB.left ||
+        triangleA.top > triangleB.bottom ||
+        triangleA.bottom < triangleB.top)
+    {
+        return false;
+    }
+
     var lineAA = triangleA.getLineA();
     var lineAB = triangleA.getLineB();
     var lineAC = triangleA.getLineC();