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Chasing a sprite?

by Isaac Barbosa · in Torque Game Builder · 01/31/2007 (7:48 am) · 6 replies

Hello TGB growing community :)

I have been reading through the whole documents to check if there is a method to do this but isn't at all:

So I want to ask for some directions if somebody have done this before, I have a static sprite moving all over the stage, another static sprite is shooting some balls at random directions and speeds, but I want that those balls chase after the moving sprite... is this possible? I need to script some kind of AI?

Thanks for the help, as always very useful ;)

Isaac
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Torque Owner Ben R Vesco
#1
01/31/2007 (7:59 am)
Your approach to the situation depends on what you mean by chasing. Chasing can mean always moving toward the target's current position, guessing where the target will be in X seconds and moving toward that place, or anything else you can come up with.

If you just want to always move toward the target's current position you could set a moveTo every tick with the target's position as the destination.


Torque Owner Isaac Barbosa
IQ Games
#2
01/31/2007 (8:18 am)
I found moveTo thanks to another thread... I'm looking at the docs now :) As you say Ben, that's exactly what I want to do! Thanks

Torque Owner Isaac Barbosa
IQ Games
#3
01/31/2007 (8:23 am) 
%this.targetX = $hammer.getPositionX();
   %this.targetY = $hammer.getPositionY();
   %this.speed = 20;
   %this.moveTo(%targetX, %targetY, %speed, [%autoStop = true], [%callback = false], [%snap = true], [%margin = 0.1]);

hum... I'm trying this but I'm getting an error in the last line... what could be wrong?

Torque Owner Ben R Vesco
#4
01/31/2007 (9:25 am)
You can't put [] around your arguments. Those [] mean the parameter is optional. Also your %targetX and %targetY (and %speed) are not initialized because you are making them vars on the object. Try more like this:

%targetX = $hammer.getPositionX();
%targetY = $hammer.getPositionY();
%speed = 20;
%this.moveTo(%targetX, %targetY, %speed);


Torque Owner Isaac Barbosa
IQ Games
#5
01/31/2007 (10:09 am)
Hum...

So this code has to be outside of the object? like a global variable?

Torque Owner Isaac Barbosa
IQ Games
#6
01/31/2007 (11:39 am) 
%targetX = Hammer.getPositionX();
%targetY = Hammer.getPositionY();
%speed = 20;

Thanks Ben, my problem was the $ now is working :)