Avoid Enemy Ai walk into higher ground terrain or walk on Air

Question

How can i avoid my enemy ai to not walking into the high ground in my terrain, and at the same time i can prevent it not to walk on the air after it move to a higher ground, which i mean it moves based on the terrain's ground height so that it will not walking on the air when it moves to a lower ground..

Answer 1

Answer by Punkjim420 · Jan 24, 2013 at 09:41 AM

which language? javascript or c#? in javascript id check if the enemy is grounded or not. if it isnt grounded add force to make it "fall" til it hits ground.

in javascript something like this..

 var isGrounded : boolean = false;  //means it is not on the ground
 
 
 function Update(){
     if(!isGrounded){
         rigidbody.AddForce(Vector3.Up * insert a negative number here like -1, -2, -3, etc);
     }
 }
 
 function OnCollisionEnter(col : Collision){
     if(col.gameObject.FindWithTag("Terrain")){
         isGrounded = true;
     }
 }

for this to work youd need a tag on your terrain object called "Terrain" and a rigidbody on the enemy, or you can use transform.Translate instead of rigidbodys. it depends how your monster moves. force, or translations. you will probably have to edit it to fit your scripts a little. If you do it right, as long as the monster isnt standing on your terrain it will push it down if your force is high enough.(should be more than the force used to make the enemy "walk". Hope this helped.

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Punkjim420 · Jan 24, 2013 at 09:47 AM 0

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oh and for the enemy walking into terrain...that shouldnt be possible you might not be using colliders or rigidbodies, could you show your movement script and tell if your objects have colliders/rigidbodies?

Answer 2

Answer by shenglee83 · Jan 24, 2013 at 09:53 AM

thank you for this script. My enemy object is use character controller actually... i have rigidbody as well..... but anyhow i will try ur script 1st.

Thanks alot.

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Punkjim420 · Jan 24, 2013 at 10:05 AM 0

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no problem but you shouldnt just use scripts that are given, you should try to understand them so you can write your own. Also, please dont reply using an Answer, theres an "add new comment" button. Use that to reply to other people, unless your posting an answer to somebody elses question.

shenglee83 · Jan 24, 2013 at 11:49 AM 0

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u r right... actually still new in this part. But what i wan to ask again is how the isGrounded variable able to tell the that my enemy ai is on ground or not??? i mean how it will tell update function to addforce to the rigidbody?

Punkjim420 · Jan 24, 2013 at 12:17 PM 0

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isGrounded is a variable that is of type boolean. A boolean can only be true or false. The function OnCollisionEnter(col : Collision) is a function that checks for collision(touch). So this script is setting the boolean(isGrounded) as true if your touching an object tagged as "Terrain" then in the update function we wrote an if statement.

if(!isGrounded){ rigidbody.AddForce(Vector3.Up * insert a negative number here like -1, -2, -3, etc); }

that says if(!isGrounded) or in other words, if isGrounded is false, (your not touching ground) to add force to the rigidbody that your enemy has attached to it.

Does this make any sense to you? Sorry, im not really good at explaining things.

shenglee83 · Jan 24, 2013 at 01:57 PM 0

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that's very helpful.... man, u r good in explaining this... it freshes my mind and i get another understanding from it... Thanks man

Punkjim420 · Jan 25, 2013 at 12:11 AM 0

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no problem, glad i could help.

Avoid Enemy Ai walk into higher ground terrain or walk on Air

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