trying to add a slight margin to the walls

1 files changed, 37 insertions, 0 deletions

diff --git a/assets/javascripts/rectangles/models/room.js b/assets/javascripts/rectangles/models/room.js
index f0ebc76..b66d868 100644
--- a/assets/javascripts/rectangles/models/room.js
+++ b/assets/javascripts/rectangles/models/room.js
@@ -94,6 +94,43 @@ window.room = (function(){
 		return collision
 	}
 
+	room.prototype.collidesDisc = function(x,y,radius){
+		var collision = 0, wall_collision, contains_x, contains_y
+		this.regions.forEach(function(r){
+			if (! r.sides) return
+			
+			wall_collision = 0
+
+			if ((r.sides & FRONT) && y-radius < r.y.a) {
+				wall_collision |= FRONT
+			}
+			if ((r.sides & BACK) && r.y.b < y+radius) {
+				wall_collision |= BACK
+			}
+			if ((r.sides & LEFT) && x-radius < r.x.a) {
+				wall_collision |= LEFT
+			}
+			if ((r.sides & RIGHT) && r.x.b < x+radius) {
+				wall_collision |= RIGHT
+			}
+			if (! wall_collision) return
+
+			contains_x = r.x.contains(x, radius)
+			contains_y = r.y.contains(y, radius)
+
+			if (contains_x) {
+				collision |= wall_collision & FRONT_BACK
+			}
+			else if (contains_y) {
+				collision |= wall_collision & LEFT_RIGHT
+			}
+			else if (bitcount(wall_collision) > 1) {
+ 				collision |= wall_collision
+			}
+		})
+		return collision
+	}
+
 	return room
 
 })()