How Do i shoot projectiles properly?

**How Do i shoot projectiles properly? -** 02-19-2009, 08:01 PM

Well i have a project and i want to shoot tennis balls at airplanes and i want it to be like aim and shoot style. Unfortunately the balls can go right through the targets and only register where they end up. I have attached a project file and am wondering if it is possible to do. I dont want the tennis balls to move to the planes i just want the program to register when they pass through the planes and then make the plane fall through the floor.

Scott300 · 08:02 AM

Looking at your file really quickly I notised a few things wrong.

1.Your leaveing the tennis balls as the vehicle so if you move the plane after you fire the tennis balls, the balls will follow the way you go, so after there fired remove there vehical to the jet to they continue on there path.

2. Your only checking for a hit right when you fire it, you need it to be called much longer than right after its fired, so stick it in a while, or loop it either or to make sure it checks it more than right when it is fired. (also it might be waiting till the balls are 200 feet away
so stick the check for hit in with the move 200 feet foward in a Do Together.

3.Your only checking for a hit with navy yet 2 none of the others. You could do each one by its self for do a for all together and make a object list with all the jets in it.

4.Lastly when your checking for a hit with both balls it will play the death animation 2 times since it check for both balls to see if it hit, make like a var is_hit set it to false when its hit set it true and make an if statement on the check for hit

if(is_hit==false)
{
do kill
}
else
{
nothing
}

02-20-2009, 05:49 PM

alright i fixed the tennis balls and am about to code the other planes but how exactly do i "stick it in a while, or loop it either or to make sure it checks it more than right when it is fired." I am just barely learning how to use alice (2 weeks).
also how do i make like a var is_hit set it to false when its hit set it true and make an if statement on the check for hit

if(is_hit==false)
{
do kill
}
else
{
nothing
}
thanks

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	#2 (permalink)
Scott300 Senior Member Status: Offline Posts: 80 Join Date: Feb 2009 Location: Ohio	02-20-2009, 07:58 AM Looking at your file really quickly I notised a few things wrong. 1.Your leaveing the tennis balls as the vehicle so if you move the plane after you fire the tennis balls, the balls will follow the way you go, so after there fired remove there vehical to the jet to they continue on there path. 2. Your only checking for a hit right when you fire it, you need it to be called much longer than right after its fired, so stick it in a while, or loop it either or to make sure it checks it more than right when it is fired. (also it might be waiting till the balls are 200 feet away so stick the check for hit in with the move 200 feet foward in a Do Together. 3.Your only checking for a hit with navy yet 2 none of the others. You could do each one by its self for do a for all together and make a object list with all the jets in it. 4.Lastly when your checking for a hit with both balls it will play the death animation 2 times since it check for both balls to see if it hit, make like a var is_hit set it to false when its hit set it true and make an if statement on the check for hit if(is_hit==false) { do kill } else { nothing } Last edited by Scott300; 02-20-2009 at 08:02 AM. Reason: Forgot something

	#3 (permalink)
Art Guest Status: Posts: n/a	02-20-2009, 05:49 PM alright i fixed the tennis balls and am about to code the other planes but how exactly do i "stick it in a while, or loop it either or to make sure it checks it more than right when it is fired." I am just barely learning how to use alice (2 weeks). also how do i make like a var is_hit set it to false when its hit set it true and make an if statement on the check for hit if(is_hit==false) { do kill } else { nothing } thanks