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Line Following Car With Scratch Program

 We will make the example of a line following  car with the Scratch program.

Line Following Car With Scratch Program

Line Following Car

For the line following car sample application that we will do with the Scratch program, we will first make a car track. For this, the scene in the lower left is selected. Then, we click on the backdrop in the middle of the Code and Sounds tab, which is in the middle of the screen. Here we select the circle icon, specify the color of the track, and then draw a circle, outlined circle. Let's draw the edge of the circle in bold.


Scratch games

Then we click on the pencil icon in the sprite part (Draw a paint). Here we draw a rectangular car. We draw two small squares. These will be the wheels of the car. We draw two much smaller rectangles. We do two of these with different colors. Because, so that we can control more easily whether it is out of line or not. We put the car on the black line of the track. The most important point here is that we are making the car smaller. Two colored headlights on the front of the car should be just above the black line. If one of the headlights goes beyond the black line and sees the ground color, the codes we have written may not work as we want.

Game Making with Scratch

Let's come to the codes we will write inside the car. When the green flag is clicked, we write the coordinates of the place where we want the car to stop. Wherever we left the program running. The car will always be at that coordinate. If you turn 90 degrees direction, when the car starts every program, it will start counterclockwise at the coordinate we specified. Then he came to move our car and check if it was out of line. Our car will move on its own, not with the arrow keys. For this, we add the Continuously forever code from the Control menu. Our car will go 3 steps in every move. Now, we check with the if code whether our car follows the line while it is moving. There are two possibilities here, if the car slides to the right, first the right headlight will touch the white ground and the left headlight should still be above the black line. The other possibility is that the car may slide to the left, first of all the left headlight will come out of the line and the right headlight should be above the black line. If two possibilities will occur at the same time in the code, we add the code And from the Operators menu, and if the colors we will choose from the sensing menu touch each other? We add the code. Does the blue color touch the white color (right headlight touch the white ground?) is the left headlight color on the black line? while we are like this, we turn the direction of the car to the right by 15 degrees (you can adjust this degree according to yourself). We do the same for the car shifting to the left.


 

To download the source code of the program CLICK HERE

To see the running version of the program CLICK HERE

 

 Similar Topics

For All Scratch Examples CLICK HERE

For Mblock With Arduino Examples CLICK HERE

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