Mario: top collision detection

mario/mario_visitor.cpp

@@ -6,6 +6,8 @@ void MarioVisitor::visit( const SDLPP::RenderObject &obj ) {
     auto id = obj.getId();
     switch ( id ) {
     case FLOOR_ID:
+    case BRICK_ID:
+    case BRICK_TOP_ID:
         if ( from == MARIO_FLOOR_DETECT ) {
             onGround = true;
             groundY = obj.getPos().getY();
@@ -13,6 +15,8 @@ void MarioVisitor::visit( const SDLPP::RenderObject &obj ) {
             left = true;
         } else if (from == MARIO_RIGHT_SIDE_DETECT ) {
             right = true;
+        } else if (from == MARIO_TOP_DETECT) {
+            top_hit = true;
         }
         break;
     case DEATH_ID: