how can i find direction of drawn an arc between 2 gameobjects

Questions & Answers
1

I drew an arc between 2 gameobjects . Now I want to see direction of arc so I want to draw an arrow How can I do this? Code is here:

using UnityEngine;
using System.Collections;

public class Line : MonoBehaviour 
{

	public Transform p0Transform, p1Transform;
 
    void OnDrawGizmos()
    {
        if (p0Transform == null || p1Transform == null)
        return;


        Vector3 p0 = p0Transform.position;
        Vector3 p1 = p1Transform.position;

        Vector3 center = new Vector3(p0.x, 0f, p1.z);

        float radiusX = p0.x - p1.x;
        float radiusZ = p0.z - p1.z;
                                          
        Gizmos.color = Color.cyan;

        int segmentCount = 5;
        float angleInterval = (1f / segmentCount) * (Mathf.PI * 0.5f);

        for (int i = 0; i < segmentCount; i++)
        {

            float angle = ((float)i / segmentCount) * (Mathf.PI * 0.5f) + Mathf.PI * 0.5f;
            float nextAngle = angle + angleInterval;

            Vector3 lineStartPos = center + new Vector3(Mathf.Cos(angle) * radiusX, 0f, Mathf.Sin(angle) * radiusZ);
            Vector3 lineEndPos = center + new Vector3(Mathf.Cos(nextAngle) * radiusX, 0f, Mathf.Sin(nextAngle) * radiusZ);

            Gizmos.DrawLine(lineStartPos, lineEndPos);

        }
    }

}
2

Perhaps I’m not understanding you correctly, but wouldn’t the direction of your arrow be:

Vector3 direction = lineEndPos - lineStartPos;

After the last iteration? So just move lineEndPos and lineStartPos out of your loop:

Vector3 lineStartPos;
Vector3 lineEndPos;

for (int i = 0; i < segmentCount; i++)
{
    float angle = ((float)i / segmentCount) * (Mathf.PI * 0.5f) + Mathf.PI * 0.5f;
    float nextAngle = angle + angleInterval;
 
    lineStartPos = center + new Vector3(Mathf.Cos(angle) * radiusX, 0f, Mathf.Sin(angle) * radiusZ);
    lineEndPos = center + new Vector3(Mathf.Cos(nextAngle) * radiusX, 0f, Mathf.Sin(nextAngle) * radiusZ);
 
    Gizmos.DrawLine(lineStartPos, lineEndPos);
}

Vector3 direction = lineEndPos - lineStartPos;

// Draw arrow here