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3. Turn the Sprite Left and Right

Transcript

In this video, you'll program the sprite to turn when the arrow keys are pressed.

To start, select events and drag out two when key pressed blocks.

Change their values in the drop down to left arrow and right arrow.

For motion, add the appropriate turn blocks to teach arrow.

Press the right and left arrow keys to test.

Cool.

The sprites turn when the arrow key is pressed, but they don't turn smoothly.

To fix this, you will program the sprite to repeat turning until the arrow key is no longer being pressed.

This will make the sprite turn smoothly when the key is pressed and held down.

Click control and add a repeat until block around one of the turns.

Because you'll have to program this twice, it's a good idea to try it on one turn, see if it works, then copy the code for the other turn.

Clock operators and add a not block into the repeat until block.

From sensing add a key pressed block and change the value to the correct arrow key.

Test your code.

If you stop the game with the player sprite in the corner, it stays there even when a new game is started.

To fix this, add a go to block at the beginning of the code.

Change the value of this block to a position on the left side of the stage.

Now test the code again.

Perfect!

Finally, test the entire program to make sure that it works the way you want it.

Tinker with the values in the move blocks to make sure that the sprite is moving and turning at a speed that works for your game.

Adjusting these can make your game a lot easier or a lot harder, it's up to you.

In the next video, you'll program this game to level up with spawning enemies.

Now it's your turn.

Program the arrow keys to turn the sprite right and left, then make the sprite turn smoothly using repeat until, key pressed, and not blocks.

Instructions
  1. Select the player 1 sprite and create events for the left and right arrow keys.
  2. Add two "turn" blocks to make the sprite turn left and right.
  3. Make the player 1 sprite turn smoothly by adding a "repeat until" block, a "not" block, and a "key pressed" block to each "turn" stack.