Page 194 - CodePilot V5.0 C8

USING EYE SENSING BLOCKS

The Eye sensing blocks enable the robot to detect colours and objects using its Front or Down Eye
sensors. These blocks are located in the Sensing category under Sensing – Eye.
Some of the key blocks are as follows:

Blocks Description
Eye sensor near object? This block detects a specific object (like an object shape

FrontEye is near object? or a symbol) in the robot’s visual field.

Eye Sensor detects [color]? This block detects a specific colour in the robot’s view.

FrontEye detects red ?

Eye Sensor brightness in % This block detects the brightness of the surface in front

FrontEye brightness in % of the robot.

Program 5 Make the robot move and respond according to the detected colour.

This program shows how a robot uses colour detection to make movement decisions. When it
detects green, it turns right 90°, blue makes it turn left 90° and red makes it stop. The code and
its output are shown below:

when started

set drive velocity to 40 %
set turn velocity to 40 %

drive forward

forever

if FrontEye detects green ? then
turn right for 90 degrees

drive forward

if FrontEye detects blue ? then
turn left for 90 degrees

drive forward

if FrontEye detects red ? then
stop driving

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