Help with my radar please.

Unity Engine
1

Hey there everyone, I know there is a radar script on the unity wiki that I could use, but I want to make my own and I am so close to completing it. Here is the code(that you may want to copy to a text editor(lol)):

using UnityEngine;
using System.Collections;

[AddComponentMenu("HUD/Radar")]
public class Radar : MonoBehaviour {
	//Radar texture/positioning crap
	public Texture2D radarImage;
	public Texture2D ourBlip;
	public Texture2D enemyBlip;
	public Vector2 radarSize;
	public Vector2 blipSize;
	
	//The rest
	public Transform pivOffset;
	private GameObject[] enemies;
	public float maxDistance;
	
	void OnGUI()
	{
		enemies = GameObject.FindGameObjectsWithTag("Finish");	    
		Vector2 radCenter = new Vector2(Screen.width - (radarSize.x / 2), Screen.height - (radarSize.y / 2));
		Vector2 radarPlace = new Vector2(Screen.width - radarSize.x, Screen.height - radarSize.y);
		GUI.DrawTexture(new Rect(radarPlace.x, radarPlace.y, radarSize.x, radarSize.y), radarImage, ScaleMode.ScaleToFit, true);
		GUI.DrawTexture(new Rect(radCenter.x - (blipSize.x / 2), radCenter.y - (blipSize.y / 2), blipSize.x, blipSize.y), ourBlip, ScaleMode.ScaleToFit, true);
		foreach(GameObject enemy in enemies)
		{
			float distance;			
			distance = Vector3.Distance(enemy.transform.position, pivOffset.position);
			if(distance <= maxDistance)
			{
				Vector2 position2D = new Vector2(enemy.transform.position.x - transform.position.x, enemy.transform.position.z - transform.position.z);
				DrawBlips(distance, enemyBlip, radCenter, position2D);
			}
		}
	}
	
	void DrawBlips(float distance, Texture2D blip, Vector2 offset, Vector2 pos2D)
	{
		float scaleRadarRange = maxDistance / radarSize.y;
		pos2D.x /= scaleRadarRange;
		pos2D.x /= 2;
		pos2D.y /= scaleRadarRange;
		pos2D.y /= 2;
		GUIUtility.RotateAroundPivot(-pivOffset.eulerAngles.y, offset);		
		GUI.DrawTexture(new Rect(offset.x - (blipSize.x / 2) + pos2D.x, (offset.y - (blipSize.y /2)) - pos2D.y, blipSize.x, blipSize.y), blip);
	}
}

It works great when there is only one enemy within distance. But if there are two or more, then GUIUtility.RotateAroundPivot, stacks for each enemy. Any suggestions on how to fix this?

2

Cough

3

Reset the gui matrix after you use it.

–Eric

4

I’m sorry, I tried to figure it out, but how would one go about resetting the matrix?

5

Store it in a variable before altering it and then load it back again.

–Eric

6

Thats how I was going to do it, I just don’t know which variable to modify.

7

Heh, oops. I figured it out. It was simpler than I thought, too simple.

Here are the end results for anyone wanting a different radar.

using UnityEngine;
using System.Collections;

[AddComponentMenu("HUD/Radar")]
public class Radar : MonoBehaviour {
	//Radar texture/positioning crap
	public Texture2D radarImage;
	public Texture2D ourBlip;
	public Texture2D enemyBlip;
	public Vector2 radarSize;
	public Vector2 blipSize;
	
	//The rest
	public Transform pivOffset;
	private GameObject[] enemies;
	public float maxDistance;
	
	void OnGUI()
	{
		enemies = GameObject.FindGameObjectsWithTag("Finish");	    
		Vector2 radCenter = new Vector2(Screen.width - (radarSize.x / 2), Screen.height - (radarSize.y / 2));
		Vector2 radarPlace = new Vector2(Screen.width - radarSize.x, Screen.height - radarSize.y);
		GUI.DrawTexture(new Rect(radarPlace.x, radarPlace.y, radarSize.x, radarSize.y), radarImage, ScaleMode.ScaleToFit, true);
		GUI.DrawTexture(new Rect(radCenter.x - (blipSize.x / 2), radCenter.y - (blipSize.y / 2), blipSize.x, blipSize.y), ourBlip, ScaleMode.ScaleToFit, true);
		foreach(GameObject enemy in enemies)
		{
			float distance;			
			distance = Vector3.Distance(enemy.transform.position, pivOffset.position);
			if(distance <= maxDistance)
			{
				Vector2 position2D = new Vector2(enemy.transform.position.x - transform.position.x, enemy.transform.position.z - transform.position.z);
				DrawBlips(distance, enemyBlip, radCenter, position2D);
			}
		}
	}
	
	void DrawBlips(float distance, Texture2D blip, Vector2 offset, Vector2 pos2D)
	{
		float scaleRadarRange = maxDistance / radarSize.y;
		pos2D.x /= scaleRadarRange;
		pos2D.x /= 2;
		pos2D.y /= scaleRadarRange;
		pos2D.y /= 2;
        Matrix4x4 stuff = GUI.matrix;
		GUIUtility.RotateAroundPivot(-pivOffset.eulerAngles.y, offset);		
		GUI.DrawTexture(new Rect(offset.x - (blipSize.x / 2) + pos2D.x, (offset.y - (blipSize.y /2)) - pos2D.y, blipSize.x, blipSize.y), blip);
		GUI.matrix = stuff;
	}
}