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    This chapter introduces you to the fascinating world of VEXcode VR programming, where you will
                     learn how robots sense their surroundings, make logical decisions and move through complex mazes.

                     VR ROBOT’S SENSORS

                     In VEXcode VR, a sensor is a tool that helps the robot understand what’s around it. Sensors allow the
                     robot to gather information, so it can react to its environment. Here are the main types of sensors:

                     Sensing-Bumper
                     These sensors detect when the robot bumps into something. When this happens, the robot can
                     stop or change direction.

                     Some of the important Bumper sensing blocks are as follows:
                                   Block                                          Description
                                                         This block checks if either the LeftBumper or RightBumper is
                        LeftBumper   pressed?
                                                         pressed, based on the selected option.
                                                         This block  triggers an action  when  the LeftBumper  or

                       when  LeftBumper    pressed       RightBumper is either pressed or released, depending on the
                                                         selected condition.

                     Sensing-Eye
                     These sensors help the robot see objects and colours in front of it and below it. The robot can use
                     this to recognise things or avoid obstacles.
                     Some of the important Eye sensing blocks are as follows:

                                    Block                                          Description

                         FrontEye  is near object?         This block checks if an object is close in front of the robot.

                         FrontEye  detects  red  ?         This block detects a specific colour in the robot’s view.

                                                           This block measures the brightness of the surface directly in
                        FrontEye  brightness in %
                                                           front of the robot.

                                                           This block triggers an action when the Front Eye or Down
                       when FrontEye   detects  an object
                                                           Eye of Robot detects or or loses an object.

                     Sensing-Distance
                     This sensor measures how far an object is from the robot. It helps the robot avoid crashing into
                     things by telling it how much space is ahead.

                     Some of the important Distance sensing blocks are as follows:
                                     Block                                          Description

                                                            This block checks if the FrontDistance sensor detects any
                         FrontDistance  found an object?
                                                            object in front of the robot.
                                                            This block  measures  the  distance  from the  robot  to  an
                        FrontDistance  in  mm
                                                            object in millimetres, based on the sensor’s reading.

                                                                             Sensors, Logic and Maze Navigation
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