Geometry Lib

GeometryHelper.cs

using UnityEngine;
using System.Collections;

[System.Serializable]
public class TwirlLineRenderer
{
	[SerializeField] private  LineRenderer lineRenderer;
	
	[SerializeField] private float radius = 1f;
	
	[SerializeField] private float lineWidth = 0.25f;
	
	[SerializeField] private float loop = 1f;
	
	private const int stepMin = 8;
	private const int stepMax = 64;
	[Range(stepMin, stepMax)] [SerializeField] private int step = 1;
	
	private const float twirlMin = -1f;
	private const float twirlMax = -1f;
	[Range(twirlMin, twirlMax)] [SerializeField] private float twirlXDirection = 1f;
	[Range(twirlMin, twirlMax)] [SerializeField] private float twirlZDirection = 1f;
	[Range(twirlMin, twirlMax)] [SerializeField] private float twirlYDirection = 1f;
	
	private Vector3 vertPos = Vector3.zero;
	
	private int stepTot = 10;
	
	
	public void SetLoop(float loop)
	{
		this.loop = Mathf.Max(loop, 0f);
		
	}// SetLoop()
	
	
	public void SetLineWidth(float lineWidth)
	{
		this.lineWidth = lineWidth;
		
	}// SetLineWidth()
	
	
	public void SetRadius(float radius)
	{
		this.radius = radius;
		
	}// SetRadius()
	
	
	public void Refresh()
	{
		if(lineRenderer == null) return;
		
		step = Mathf.Clamp(step, stepMin, stepMax);
		
		SetLoop(loop);
		
		stepTot = Mathf.FloorToInt(loop * (step + 1));
		
		float iStep = 1f;
		iStep /= (float)(stepTot - 1);
		
		lineRenderer.SetVertexCount(stepTot);
		
		lineRenderer.SetWidth(lineWidth, lineWidth);
		
		for(int i = 0; i < stepTot; i++)
		{
			float _f_ratio = i * iStep;
			
			float _f_sphere = Mathf.Cos((90f + 180f * _f_ratio) * Mathf.Deg2Rad);
		
			vertPos.y = Mathf.Sin((90f + 180f * _f_ratio) * Mathf.Deg2Rad) * radius * twirlYDirection;
			
			vertPos.x = Mathf.Cos(360f * _f_ratio * loop * Mathf.Deg2Rad) * radius * _f_sphere * twirlXDirection;
			
			vertPos.z = Mathf.Sin(360f * _f_ratio * loop * Mathf.Deg2Rad) * radius * _f_sphere * twirlZDirection;
			
			lineRenderer.SetPosition(i, vertPos);
			
		}//for()
		
	}// Refresh()

}// TwirlLineRenderer