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i am making a game that is a cross between space invaders and asteroids. I have done most of the stuff but my bullet does'nt work. It goes in the corner of the screen and moves when i move the ship. Could someone help?

Source attached

I use DBP

If you go through your code logically you will see that it is working perfectly!
When I say perfectly, I mean that what you have written will do exactly what you have described it does.

Let's go through it together:

Sprite 999 is your bullet. It doesn't exist at all until you press the spacekey. At which point you position it on screen. However, you are positioning it at the objects co-ordinates, which causes a problem:

Sprites (your bullet) use screen co-ordinates.
Objects (your Ship) use world co-ordinates.

There are two ways around to get around the problem.
1) Position the bullet at the objects screen co-ordinates by using the OBJECT SCREEN X() and OBJECT SCREEN Y() commands.

or

2) (preferred method) Don't use a sprite for your bullet ... it causes problems with positioning (as we have mentioned) but it will also make collision detection unneccesarily awkward. Instead make a plain and texture that with the bullet image. You can then position it as you would any other 3D object.

There are several other errors with your code. The bullet wont move as you would expect. Nor will it ever disappear.
Also this line: When the help file says image number it doesn't mean for you to type in 'image number', you are supposed to supply the number which references the image that you want to use for you particles.

There's also a tutorial on the different methods of shooting bullets on my web site if you are still not sure about it. (Link at bottom of my post).

TDK_Man

its now


but when i press the spacebar it comes up with an error message - "object already exists at line 52"

sos

by the way i used the dbp help example for the particles - thats why it said "ImageNumber"

Yes, it would do!

Every time you the press space bar, you try to make object 999. You can't do that. You need to make it before your main loop and only position it when you want to use it.


and ...

... and quoting myself:
That's why you don't

I recommend that you read TDK's bullet tutorial. If your eyes can handle the horrendous colour scheme on his website then you will find some pretty useful info there.

ty