rokojori_action_library/Tools/Gizmos.cs

using Godot;
using Rokojori;
using System.Collections.Generic;

namespace Rokojori
{  
  [Tool]
  public class Gizmos
  {
#if TOOLS

    public static void AddArc( List<Vector3> linePoints, Vector3 center, Vector3 axisA, Vector3 axisB, float angleStart, float angleEnd, int segments )
    {
      var last = center + axisA * Mathf.Cos( angleStart ) + axisB * Mathf.Sin( angleStart );

      for ( int i = 1; i <= segments; i++ )
      {
        var t = angleStart + ( angleEnd - angleStart ) * ( i / (float) segments );
        var point = center + axisA * Mathf.Cos( t ) + axisB * Mathf.Sin( t );

        linePoints.Add( last );
        linePoints.Add( point );

        last = point;
      }
    }

    public static void AddCircle( List<Vector3> linePoints, Vector3 center, Vector3 axisA, Vector3 axisB, int segments = 32 )
    {
      AddArc( linePoints, center, axisA, axisB, 0, Mathf.Tau, segments );
    }

    public static void AddSphere( List<Vector3> linePoints, Vector3 scale, int segments = 32 )
    {
      var right = Vector3.Right * scale.X;
      var up = Vector3.Up * scale.Y;
      var forward = Vector3.Forward * scale.Z;

      AddCircle( linePoints, Vector3.Zero, right, forward, segments );
      AddCircle( linePoints, Vector3.Zero, right, up, segments );
      AddCircle( linePoints, Vector3.Zero, forward, up, segments );
    }

    public static void AddDome( List<Vector3> linePoints, Vector3 scale, int segments = 32 )
    {
      var right = Vector3.Right * scale.X;
      var up = Vector3.Up * scale.Y;
      var forward = Vector3.Forward * scale.Z;

      AddCircle( linePoints, Vector3.Zero, right, forward, segments );
      AddArc( linePoints, Vector3.Zero, right, up, 0, Mathf.Pi, Mathf.Max( 2, segments / 2 ) );
      AddArc( linePoints, Vector3.Zero, forward, up, 0, Mathf.Pi, Mathf.Max( 2, segments / 2 ) );
    }

    public static void AddDisc( List<Vector3> linePoints, Vector3 scale, int segments = 32 )
    {
      AddCircle( linePoints, Vector3.Zero, Vector3.Right * scale.X, Vector3.Forward * scale.Z, segments );
    }

    public static void AddCone( List<Vector3> linePoints, Vector3 scale, int segments = 32, int spokes = 8 )
    {
      var apex = Vector3.Zero;
      var baseCenter = Vector3.Up * scale.Y;
      var right = Vector3.Right * scale.X;
      var forward = Vector3.Forward * scale.Z;

      AddCircle( linePoints, baseCenter, right, forward, segments );

      for ( int i = 0; i < spokes; i++ )
      {
        var t = i / (float) spokes * Mathf.Tau;
        var basePoint = baseCenter + right * Mathf.Cos( t ) + forward * Mathf.Sin( t );

        linePoints.Add( apex );
        linePoints.Add( basePoint );
      }
    }

#endif
  }
}