koobas.hobune.stream
Keep SphereCollider radius the same, even though scale is changed
For a nice effect on a object I constantly change the scale of the transform, but this obviously changes the radius of the SphereCollider too. I need to find a way to keep the SphereCollider's radius the game, even though the scale of the transform changes.
Any idea on how to do this?
Help will be appreciated
Never $$anonymous$$d, solved it! :) This is how I did:
Start(): sphereCollider = GetComponent(); float sphereColliderRadius = sphereCollider.radius;
Update(): sphereCollider.radius = sphereColliderRadius / transform.localScale.x;
you could put your object as a child of an empty game. The empty game object gets the collider, the child scale is modified. Then no need for calculation.
It is better to not use lossyScale as it is inaccurate.
Instead use localToWorldMatrix directly:
var sphereCollider = gameObject.GetComponent<SphereCollider>();
var matrix = sphereCollider.transform.localToWorldMatrix;
var xAxisMag = matrix.GetColumn(0).magnitude;
var yAxisMag = matrix.GetColumn(1).magnitude;
var zAxisMag = matrix.GetColumn(2).magnitude;
// Adjust radius to be in meters.
sphereCollider.radius = _collisionRadius / Mathf.Max(xAxisMag, yAxisMag, zAxisMag);
Actually what you have to do is divide target spherecollider.radius by the largest component value of transform.losslyScale.
ie:-
SphereCollider __spherecollider = this .GetComponent< SphereCollider >();
float scale__float = this.transform.lossyScale.x;
if( this.transform.lossyScale.y > scale_float ) { scale_float = this.transform.lossyScale.y; }
if( this.transform.lossyScale.z > scale_float ) { scale_float = this.transform.lossyScale.z; }
__spherecollider.radius = target_radius_float / scale_float;
