How to move Left and Right...?

Getting Started Newbie Questions
#1

I literally have no idea how to do this.

I have arrows on the screen as well as an attack button(however I want my character to shoot where I click on the screen. More challenges to figure out later). Basically all I want it to do is move left and right like in Space Invaders.

Any help would be greatly appreciated :smiley:

#2

Well your arrows and fire buttons should probably have touch event handlers on them.  See:  http://docs.coronalabs.com/api/event/touch/index.html

Now you will run into an issue with your move buttons because they don’t tell you continuously that they are still being pressed.  This tutorial addresses that.

http://coronalabs.com/blog/2014/02/04/tutorial-continuous-actions-in-corona/

Rob

#3

Getting runtime errors, when simply copying code. I got the button to acknowledge it’s being clicked and I got a big green circle to move about the screen. Then I moved on to making the buttons function. However there seems to be a problem with “fireButton:addEventListener( “touch”, handleFireButton )”. In the second lot of codes. It just won’t start up with this line of code in there.
(EDIT) Actually the simulator does start up. I just get an runtime error saying “attempt to index global ‘firebutton’(a nil value) stack traceback. [C]: ?.. main.lua:60: in main chuck.” I haven’t the slightest clue what this means.

All I want to make is this:http://www.infiniteskills.com/training/mobile-game-development-with-corona-sdk/the-space-shooter-foundation.html. Why is it so darn difficult. I spend more time thinking about how perfect the game will be. Yet I can’t even get passed the basics. I take it back. The piano is much easier to learn. None the less I will keep at it :slight_smile:

Edit. Got my “ship” firing lasers up the screen by pressing a button. However I want it to fire where I press in the screen, but at least it’s a step in the right direction… Thanks again for the help.

#4

Well @moonxpig, I don’t know where you’re skills are starting from.  The video on that tutorial wasn’t playing that well for me, so I can’t tell if it’s based on an older version of Corona SDK or not.  Anyway, it might be useful for you to also look at these tutorials at the same time:   http://coronalabs.com/resources/tutorials/getting-started-with-corona/

It breaks things down by task, like how to add a touch listener and such.

Rob

#5

Sound like a good…

java

#6

I got a lot done towards the end of the night, last night. I have a fire button. My ship fires lasers up and out the screen, but I don’t think they disappear. I also got my ship moving left and right, but it doesn’t stop and goes off the screen. One step at a time I suppose.

#7

Well your arrows and fire buttons should probably have touch event handlers on them.  See:  http://docs.coronalabs.com/api/event/touch/index.html

Now you will run into an issue with your move buttons because they don’t tell you continuously that they are still being pressed.  This tutorial addresses that.

http://coronalabs.com/blog/2014/02/04/tutorial-continuous-actions-in-corona/

Rob

#8

Getting runtime errors, when simply copying code. I got the button to acknowledge it’s being clicked and I got a big green circle to move about the screen. Then I moved on to making the buttons function. However there seems to be a problem with “fireButton:addEventListener( “touch”, handleFireButton )”. In the second lot of codes. It just won’t start up with this line of code in there.
(EDIT) Actually the simulator does start up. I just get an runtime error saying “attempt to index global ‘firebutton’(a nil value) stack traceback. [C]: ?.. main.lua:60: in main chuck.” I haven’t the slightest clue what this means.

All I want to make is this:http://www.infiniteskills.com/training/mobile-game-development-with-corona-sdk/the-space-shooter-foundation.html. Why is it so darn difficult. I spend more time thinking about how perfect the game will be. Yet I can’t even get passed the basics. I take it back. The piano is much easier to learn. None the less I will keep at it :slight_smile:

Edit. Got my “ship” firing lasers up the screen by pressing a button. However I want it to fire where I press in the screen, but at least it’s a step in the right direction… Thanks again for the help.

#9

Well @moonxpig, I don’t know where you’re skills are starting from.  The video on that tutorial wasn’t playing that well for me, so I can’t tell if it’s based on an older version of Corona SDK or not.  Anyway, it might be useful for you to also look at these tutorials at the same time:   http://coronalabs.com/resources/tutorials/getting-started-with-corona/

It breaks things down by task, like how to add a touch listener and such.

Rob

#10

Sound like a good…

java

#11

I got a lot done towards the end of the night, last night. I have a fire button. My ship fires lasers up and out the screen, but I don’t think they disappear. I also got my ship moving left and right, but it doesn’t stop and goes off the screen. One step at a time I suppose.