koobas.hobune.stream
how to resize box collider?
Hey people, i'm having trouble to resize from script a box collider.
the point is: (all in my script) i create several boxes(prefab) in different positions and then i want to assing them a collider. if i look at the inspector, they've already got one, but i've not been able to modify it. my last try was modifying some code relative to resize a Mesh, but still not working.
here's the code:
function creaBordes(x:int,z:int){
for(var i:int=0;i<4;i++){
bordes[i] = Instantiate(borde, vectores[i], Quaternion.identity);
}
asignaMeshCollider(x,z);
}
function asignaVectores(x:int,z:int){
vectores[0] = Vector3(x/2, 0, 0);
vectores[1] = Vector3(x/2, 0, z);
vectores[2] = Vector3(0, 0, z/2);
vectores[3] = Vector3(x, 0, z/2);
}
function asignaMeshCollider(x:int,z:int){
var bordeColision:BoxCollider[] = new BoxCollider[4];
bordeColision[0].size.x=x;
bordeColision[0].size.y=altura;
bordeColision[1].size.x=x;
bordeColision[1].size.y=altura;
bordeColision[2].size.z=z;
bordeColision[2].size.y=altura;
bordeColision[3].size.z=z;
bordeColision[3].size.y=altura;
for(var i:int=0;i<4;i++){
bordes[i].transform.gameObject.AddComponent(BoxCollider);
bordes[i].transform.GetComponent(BoxCollider).collider=bordeColision[i];
}
}
I am a little confused there, why do you want to use a script to assign a box collider? You can simply add it to the object and size from the inspector, in the box collider and scale X, Y and Z as well as position for it. This way also everytime you create a prefab you would have your box already done.
Is there a point for you to use your script?
The box collider follows the cube size - there's no need to change its collider size, unless you want the collider to be larger or smaller than the cube. Anyway, if you want to change the collider size, try this:
function asignaMeshCollider(x:int,z:int){
for(var i: int = 0; i < 4; i++){ var boxCol: BoxCollider = bordes[i].transform.collider; if (i < 2) boxCol.size.x = x; else boxCol.size.z = z; boxCol.size.y = altura; bordes[i].transform.collider = boxCol; } } NOTE: The prefab must have one and only one box collider for this to work.
I think the line "bordes[i].transform.collider = boxCol;" isn't necessary, and may cause an error.
@Blazor Ramone, you may be right: if boxCol is created as a BoxCollider reference, any changes will affect directly the object's collider, and that last assignment isn't necessary; on the other hand, if boxCol is a BoxCollider variable, it must be copied to the object's collider to have effect. It's different from the old C, where you can always know when the variable is a structure or its pointer. I'll test this.
because those 4 box colliders are "surrounding" a terrain and the terrain can be resized during execution. and i need the boxes to replace and resize according to terrain's size
Ok, answer is correct except that last line you've already told wouldn't be necessary. in fact, that line doesn't work because is trying to modify Read Only data.
thanks a lot.
there's an "add new comment" on the bottom right corner of an answer post...
ah yes, i'm sorry. anyway i wanted to write only one answer, but firefox got lagged and i reloaded 3 times. XD thx ;)
Can anyone tell me how I can resize the box collider,in unity editor, by mouse ?
Within the Box Collider component, there should be a variable called size, change that value.
