added Query module, added Query.ray

src/collision/Query.js

@@ -0,0 +1,43 @@
+/**
+* Functions for performing collision queries
+*
+* @class Query
+*/
+
+var Query = {};
+
+(function() {
+
+    /**
+     * Casts a ray segment against a set of bodies and returns all collisions, ray width is optional. Intersection points are not provided.
+     * @method ray
+     * @param {body[]} bodies
+     * @param {vector} startPoint
+     * @param {vector} endPoint
+     * @return {object[]} Collisions
+     */
+    Query.ray = function(bodies, startPoint, endPoint, rayWidth) {
+        var rayAngle = Vector.angle(startPoint, endPoint),
+            rayWidth = rayWidth || Number.MIN_VALUE,
+            rayLength = Vector.magnitude(Vector.sub(startPoint, endPoint)),
+            rayX = (endPoint.x + startPoint.x) * 0.5,
+            rayY = (endPoint.y + startPoint.y) * 0.5,
+            ray = Bodies.rectangle(rayX, rayY, rayLength, rayWidth, { angle: rayAngle }),
+            collisions = [];
+
+        for (var i = 0; i < bodies.length; i++) {
+            var bodyA = bodies[i];
+
+            if (Bounds.overlaps(bodyA.bounds, ray.bounds)) {
+                var collision = SAT.collides(bodyA, ray);
+                if (collision.collided) {
+                    collision.body = collision.bodyA = collision.bodyB = bodyA;
+                    collisions.push(collision);
+                }
+            }
+        }
+
+        return collisions;
+    };
+
+})();

src/module/Outro.js

@@ -36,6 +36,7 @@ Matter.Gui = Gui;
 Matter.Render = Render;
 Matter.RenderPixi = RenderPixi;
 Matter.Events = Events;
+Matter.Query = Query;
 
 // CommonJS module
 if (typeof exports !== 'undefined') {