how to move an image

[Notthebbq]

my group member wants to know how to move an image around the screen with out use of arrow keys (ie: an NPC/AI) and if you could explain it simply would be nice

[apython1992]

Well, if you are using the arrow keys to move an image, you would be watching the event queue for a KEYDOWN event, which is a conditional, correct?

Pseudocode

code:

if KEYDOWN(left_arrow):     image_x -= 1

and so on. With an AI, moving the image is the same, in that you change its position. It's just the condition that's different (not a button pressed, but perhaps its position relative to the tower and which direction the path follows).

[Notthebbq]

Thanks for the advice, I was just wondering if you could elaborate on the whole AI moving part, like an example code would be really helpful. I kind of knew of the moving with keyboard solution.
Thanks again.

[Insectoid]

Say we have a loop. Inside that loop we have image_x += 1. If we execute that loop, the image will move in the +x direction.

Similarly, we can do something like

code:

if my_dog_is_male :     image_x += 1

alternatively;

code:

if i_want_to_go_left:     image_x += 1

Whether or not you want to go left is an entirely different question.

[Tony]

Most NPCs are scripted -- they don't make decisions, just follow the actions described in some text-file.

Basic AIs come down to a very simple model: what is the current world state? What move should I make this turn for this state? Repeat.