How to use Animation Curves, to evaluate distance across a given radius?

Hellow~

I have this code that is working as I expected to terraform my terrain mesh.

Now recently I found out that I can use Animation Curve to cover for the operation I'm doing in InfluenceFromDist() in a more flexible manner (given Animation Curves customizable properties in the editor), so i'm in a quest to integrate those into my MorphTerrain() but so far I can't manage to make it work... unless i'm missing something important, please check the three comments below modifiedVerts[i] += (_raises ? Vector3.up : Vector3.down) * brushIntensity * InfluenceFromDist (dist);.

I was wondering if someone can share some insight on this matter.

     // Gets influx within picel diameter, in a 0 to 1 range.
     private float InfluenceFromDist (float _dist)
     {
         return (brushRadius / (brushRadius - (brushRadius * brushHardness))) - (_dist / (brushRadius - 
         (brushRadius * brushHardness)));
     }
 
     // Used to raise and depress terrain
     private void MorphTerrain (Vector3 _selectedPoint, bool _raises)
     {
         Vector3 adaptedSelection = _selectedPoint;
         adaptedSelection.y = 0.0f;
 
         for (int i = 0; i < modifiedVerts.Length; i++)
         {
             Vector3 adaptedPoint = modifiedVerts[i];
             adaptedPoint.y = 0.0f;
 
             var dist = Vector3.Distance(adaptedPoint, adaptedSelection);
 
             if (dist <= brushRadius)
             {
                 modifiedVerts[i] += (_raises ? Vector3.up : Vector3.down) * brushIntensity * 
                 InfluenceFromDist (dist);

                 // Attemps
                 //modifiedVerts[i] += (_raises ? Vector3.up : Vector3.down) * brushIntensity * 
                 brushTypes.BrushSelected(curBrushType).Evaluate(dist);
                 //modifiedVerts[i] += (_raises ? Vector3.up : Vector3.down) * 
                  brushTypes.BrushSelected(curBrushType).Evaluate(brushIntensity);
                 //brushTypes.BrushSelected(curBrushType).Evaluate(modifiedVerts[i].y);
                 modifiedVerts[i].y = Mathf.Clamp (modifiedVerts[i].y, worldGen.sowl.worldDepth, 
                 worldGen.sowl.worldHeight);
             }
         }

Also, here is my brushTypes struc, if needed.

 public struct Brushes
 {
     public enum BrushTypesForSelection { LINEAL, CURVED, 
     INVERSEDCURVED, FLAT }
     public BrushTypesForSelection selectedBrush;
 
     public AnimationCurve lineal;
     public AnimationCurve curved;
     public AnimationCurve curvedInv;
     public AnimationCurve flat;
 
 
     public AnimationCurve BrushSelected (BrushTypesForSelection _brushType)
     {
         selectedBrush = _brushType;
 
         switch (selectedBrush)
         {
             case BrushTypesForSelection.LINEAL:
                 return lineal;
             case BrushTypesForSelection.CURVED:
                 return curved;
             case BrushTypesForSelection.INVERSEDCURVED:
                 return curvedInv;
             case BrushTypesForSelection.FLAT:
                 return flat;
         }
 
         return null;
     }
 }

I assign curBrushType from Canvas UI options.

Cheers~

*Sorry for any grammars, non-english speaker here.. ;3!