Arrow Stab into ground and stay(script)

Question

Hello :) I need help....

this is the code i am currently using

CODE#

 private var cam : follow_transform;
 
 function Start()
 {
     rigidbody.useGravity = false;
 }
 
 function Update () 
 {
     if(cam.fire)
     {
         FireArrow();
     }
 }
 
 function OnCollisionEnter(info : Collision) 
 {    
     if(info.gameObject.tag == "ground")   //ground is the base 
     {
         transform.rigidbody.isKinematic = true;
         gameObject.transform.parent = info.gameObject;
         DestroyAfteryield(2);
     }
 }
 
 function FireArrow()
 {
     rigidbody.useGravity = true;
     rigidbody.AddForce(-transform.forward * cam.fireforce * 110,ForceMode.Force);
 }
 
 
 function DestroyAfteryield(time : float)
 {
     yield WaitForSeconds(time);
     Destroy(gameObject);
 }

what i actually want is that when the arrow hits the ground it should actually stick there(just like a knife is stabbed)everything seems to work fine the arrow sticks to the ground but the moment it collides with the ground it gives an error(Cannot cast from source type to destination type in the following line(gameObject.transform.parent = info.gameObject;))and the arrow doesn't get destroyed as it should be according to the DestroyAfterYield function.

can anyone help me out with this thanks in advance

Answer 1

Best Answer

Answer by taters · May 26, 2011 at 11:59 AM

I think you need to parent to the 'transform' of the gameObject, not the gameobject itself.

try:

gameObject.transform.parent = info.gameObject.transform;

(not tested)

not sure on the destroy thing. Maybe that exception was causing that function to quit at that point, therfore not running the destroy. Put a print in the destroy function, see if it gets called.

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crazyKnight · May 26, 2011 at 12:54 PM 0

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i have already tried what you are suggesting but its is giving me very weird results,if i try your code then the moment the arrow collides with the ground it transform itself it to some other position and scales(i cant understand in what way is it scaling the arrow bcoz the arrow turns into a "what should i call that" object)

crazyKnight · May 26, 2011 at 12:58 PM 0

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and the destroy function is not called

taters · May 26, 2011 at 03:12 PM 0

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The reason it's scaling odd is because as soon as you add the child to the parent, it inherits it's scale. Ideally you want the ground to be 1,1,1 scale. (You may have stretched a cube primitive?, you'll need to make a 3D model if you want a custom shape/size). As for the destroy function, it should work.

I knocked up a quick scene. http://www.pyramid-design.co.uk/temp/arrowtest.zip

It shows a cube sticking on another cube. All works. But as soon as you scale the ground, you'll notice it screws up. Destroy function seems to be working o.k too. Hope this helps :)

Joshua · May 26, 2011 at 03:13 PM 1

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Why the downvote? He is correct that transform.parent should be set to a type of Transform, not GameObject - so upvote to compensate.. Also. Format your code if you want people to bother reading it.

Joshua · May 26, 2011 at 03:48 PM 0

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@Taters (hadn't seen your comment at the time of posting $$anonymous$$e) the scaling could of course be compensated to rescale according to the parent's scale.

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Answer 2

Answer by crazyKnight · May 27, 2011 at 05:39 AM

thanks everyone for there help and support. instead of figuring out how to maintain scale... i was more concerned about the errors...and was not using transform instead of game object anyways thanks all

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Arrow Stab into ground and stay(script)

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