Splash (Again)

I cant make it so that the water creates a splash when hit by an object. i'm looking to instantiate a prefab when there is a collision var power. does anyone have suggestions? or scripts? :roll:

 

I did this some time ago. Yoggy did some better stuff with water here, but it requires Pro.

--Eric

 

thanks... but i don't want to get all deep. is there a simpler (less expensive :roll: ) way?

 

My technique doesn't require Pro, so do something similar to that.

--Eric

 

Here is the script im trying:

Code (csharp):

1. /// Spawns an object (often a particle system).
2.  
3. // Anything declared with var outside a function is visible and can be changed in the inspector
4. var splash : GameObject;
5.  
6. function OnCollisionEnter () {
7.     // Instantiate the explosion object if we assigned one in the inspector!
8.     if (explosion != null) {
9.         instantiatedExplosion = Instantiate (explosion, transform.position, transform.rotation
10.         }

it doesn't work because it won't register the "}". Do you know what's wrong? :roll:

 

I think it either needs to be explosion or splash-one refrences the other, so use either not both?

Code (csharp):

1. var explosion : GameObject;
2.  
3. function OnCollisionEnter () {
4.    // Instantiate the explosion object if we assigned one in the inspector!
5.    if (explosion != null) {
6.       instantiatedExplosion = Instantiate (explosion, transform.position, transform.rotation
7.       }

You can
Substitute the word splash for explosion, but if you do do it throughout the script...

Do you know what I mean? I altered it slightly try it and see...(untested)

AC

Code (csharp):

1.  
2. var splash : GameObject;
3.  
4. function OnCollisionEnter () {
5.    // Instantiate the explosion object if we assigned one in the inspector!
6.    if (splash != null) {
7.      Instantiate (splash, transform.position, transform.rotation
8.       }
9. }

Edit>>>>>>>>> I missed a bracket-bottom code should work now

 

OH! here is someone's breakVase script i have modified (it doesn't have the collide with Tag, or work yet):

Code (csharp):

1. var brokenVase : Transform;
2. var radius = 2.0;         // The radius of the explosion that makes the vase shatter instead of just falling apart
3. var power = 10.0;         // The power of the explosion (later on this will be multiplied by the velocity,
4.                      // so the vase shatters more if it falls farther)
5. var fragility = 12;         // This is for the relative velocity when the vase hits...
6.                      // bigger numbers for fragility make the vase harder to break
7. private var numberOfCollisions = 1;   // A count for the number of objects a vase hits at once...
8.                            // we only want 1 or else you might get multiple shattered vases at once
9.  
10. // We want relative velocity info; otherwise this could be written as "function OnCollisionEnter(collision) {"
11. // and it would be a bit faster
12. function OnCollisionEnter(collision : Collision) {
13.  
14.    // If the vase isn't going fast enough to break or a collision has already been processed, then don't do anything
15.    if (collision.relativeVelocity.magnitude < fragility || numberOfCollisions != 1) {return;}
16.    else  
17.  
18.       // Get the velocity from the vase and apply it to the pieces of the broken vase
19.       // I figure the velocity would be reduced some by the impact if the vase was really shattering and not faked,
20.       // so multiply by .6...looks more or less right anyway, leaving it at 1 doesn't really
21.       var vaseVelocity = rigidbody.velocity;
22.       for (var child in clonedVase) {
23.          child.rigidbody.velocity = vaseVelocity*.6;
24.       }
25.        
26.       // Do the explosion force thing on nearby objects--the vase shards--in an attempt to simulate a properly breaking vase
27.       var explosionPos = transform.position;
28.       var colliders : Collider[] = Physics.OverlapSphere (explosionPos, radius);
29.              
30.       for (var hit in colliders) {
31.          if (!hit)
32.              continue;
33.              
34.          if (hit.rigidbody) {
35.             hit.rigidbody.AddExplosionForce(power*collision.relativeVelocity.magnitude, explosionPos, radius, 2.0);
36.          }
37.       }
38.    }

 

Here is the code that you were using. it has some problems.

1: you don't need to assign the instantiate to a var if you don't do anything with it aftarwards.

2: You are missing a ); on the instantiate line

3: You are missing a } on the bottom

4: The instantiate won't create an object at the collison point. It will place it at the center of the water every time

Code (csharp):

1.  
2. /// Spawns an object (often a particle system).
3.  
4. // Anything declared with var outside a function is visible and can be changed in the inspector
5. var splash : GameObject;
6.  
7. function OnCollisionEnter () {
8.    // Instantiate the explosion object if we assigned one in the inspector!
9.    if (explosion != null) {
10.       instantiatedExplosion = Instantiate (explosion, transform.position, transform.rotation
11.       }
12.  

Here is code that fixes all the problems and should work.

Note: If your water collider is a trigger you need to use OnTriggerEnter instead, but you can't just switch it, it needs to be set up differently with OnTriggerEnter.

Code (csharp):

1.  
2. // the splash prefab
3. var splash : GameObject;
4.  
5.  
6. // called whenever an object hits us
7. function OnCollisionEnter (collision : Collision) {
8.     // Instantiate the splash object if we assigned one in the inspector!
9.     if (splash != null) {
10.        
11.         // this part gets the correct point for the explosion out of all the explosion contacts
12.         var hitPoint : Vector3;
13.         for(contact in collision.contacts)
14.         {
15.             hitPoint += contact.point;
16.         }
17.         hitPoint /= collision.contacts.length;
18.        
19.         // do the instantiate. Make sure to clean up these splashes once they are done, with
20.         //TimedObjectDestroy or something
21.         Instantiate (splash, hitPoint, transform.rotation);
22.     }
23. }
24.  

 

Yeah, it's a trigger. So do I... what DO I do? :roll:

 

For now, you can make it not a trigger and give it a physics material with a spring. It is possible to achieve decent water this way I think. Using a trigger might be harder.

 

I'm Using your water script.

 

What is falling into the water in this case? if it is small objects, this might work ok.

Code (csharp):

1.  
2. // the splash prefab
3. var splash : GameObject;
4.  
5. // called whenever an object hits us
6. function OnTriggerEnter (other : Collider) {
7.    // Instantiate the splash object if we assigned one in the inspector!
8.    if (splash != null) {
9.      
10.       // do the instantiate. Make sure to clean up these splashes once they are done, with
11.       //TimedObjectDestroy or something
12.       Instantiate (splash, other.transform.position, transform.rotation);
13.    }
14. }
15.