Unity 3d Programming Video Tutorials

I am creating some video tutorials for programming concepts in Unity. The first video in a series that I aim to put together is basic dynamic obstacle avoidance programming.

This tutorial covers basic ray casting concepts and how to apply information received into rotations. Future videos will be more complex and discuss the creation of artificial intelligence classes to handle the work of obstacle avoidance.

This is my first video tutorial so let me know what you think.

Click below to watch the video:
http://vimeo.com/9304844

 

I gave it a quick look, nicely done. Any plans for posting the code?

 

In later videos I will include the code as it will be cleaner and more modular. But here is some basic code to play around with as it pertains to this video.

Code (csharp):

1.  
2. var target : Transform;
3. var repelForce : int = 20; // The force of which the object is pushed
4.  
5.  
6. function Update(){
7. var dir = (target.position - transform.position).normalized;
8. var hit : RaycastHit;
9. var leftRay = transform.position;
10. var rightRay = transform.position;
11. leftRay.x -= 2;
12. rightRay.x += 2;
13.  
14. if(Physics.Raycast(transform.position, transform.forward, hit, 20)){
15.      if(hit.transform != transform){
16.          Debug.DrawLine(transform.position, hit.point, Color.red);
17.           dir += hit.normal * repelForce;
18.      }
19. }
20.  
21. if(Physics.Raycast(leftRay, transform.forward, hit, 20)){
22.      if(hit.transform != transform){
23.           Debug.DrawLine(leftRay, hit.point, Color.red);
24.           dir += hit.normal * repelForce;
25.      }
26. }
27.  
28. if(Physics.Raycast(rightRay, transform.forward, hit, 20)){
29.      if(hit.transform != transform){
30.           Debug.DrawLine(rightRay, hit.point, Color.red);
31.           dir += hit.normal * repelForce;
32.      }
33. }
34.  
35. var rot = Quaternion.LookRotation(dir);
36. transform.rotation = Quaternion.Slerp(transform.rotation, rot, Time.deltaTime);
37. transform.position += transform.forward * 20 * Time.deltaTime;
38.  
39. }
40.  
41.  

This is not the cleanest code but it will serve as a starting point.

 

Nice tutorial - and well put together

Thank you

 

Wow very nice tutorial and very appreciated. I look forward to anymore you come up with.

 

good stuff, keep them coming!

 

Nice, thanks dklompmaker! I look forward to seeing more.

 

Excellent! No needless code input, easy to understand and implement, and to the point. Great work! I'm jumping aboard here with everyone who's waiting for your next tutorials.

 

Nice tutorial, simple and easy to understand. Cant wait for the rest.... No pressure

 

How would you change the script so the ai object first needs to collide with object 'subtarget' before it can reach its main target. For 'subtarget' the collider it has would be a trigger.

Can somebody plz alter the script for me since i am no expert at scripting.

Thanks very much

 

Nice tutorial thanks!

...but your website is not working.

 

Very nice!

 

Thanks for the tutorial.
but what's going on with http://www.house-lake.com/
is this your site?
there's nothing in it;

 

Very nice and easy to follow. One of my weaknesses is programming AI. This seems like a great places to start, Obstacle avoidance is key

 

And one of my weaknesses is babes with see-through clothing. Where do I get more of your avatar pic

 

as someone who has no experience with this (just an artist) this is really great to learn something new!

 

Very helpful- thanks a lot for posting it!

 

dklompmaker, Thanks I am just learning so I found even at a noob stand point I could understand what was happening.

 

I second that!