CODEWITHSUNDEEP
c#unity-game-engine
DAVIDBALAS1
DAVIDBALAS1

Reputation: 484

Unity create sprite at runtime in random position

I am trying to spawn a 2d image sprite in the screen in random position:

        tex = Resources.Load<Texture2D>("pig") as Texture2D;
        Sprite sprite = new Sprite();
        sprite = Sprite.Create(tex, new Rect(0, 0, 250, 150), new Vector2(Random.Range(-1.5f, 1.5f), Random.Range(-1.5f, 1.5f)));
        GameObject newSprite = new GameObject();
        newSprite.AddComponent<Rigidbody2D>();
        newSprite.GetComponent<Rigidbody2D>().gravityScale = 0f;
        newSprite.AddComponent<ObjectMovement>();
        newSprite.AddComponent<SpriteRenderer>();
        SR = newSprite.GetComponent<SpriteRenderer>();
        SR.sprite = sprite;

However, The placement of the sprite is not accurate and it being spawned in a tiny area, I want it to be in any point in the screen, What should my random range be?

Upvotes: 1

Views: 2504

Answers (1)

Programmer
Programmer

Reputation: 125455

You have to convert view to world point with Camera.main.ViewportToWorldPoint then you can use 0 to 1 to represent the screen size with .5 being the middle point.

Don't try to change the position from Sprite.Create. Do it after creating the sprite. Remove the random code in that line of code. The only thing to add is 

newSprite.transform.position = Camera.main.ViewportToWorldPoint(new Vector3(Random.Range(0f, 1f), Random.Range(0f, 1f), Camera.main.nearClipPlane + 15f));

I will use a code from your last question to answer to make sure there is no other problem in your current code. Tested and it works.

Texture2D tex = Resources.Load<Texture2D>("pig") as Texture2D;
Sprite sprite = new Sprite();
sprite = Sprite.Create(tex, new Rect(0, 0, 250, 150), new Vector2(0.5f, 0.5f), 40);
GameObject newSprite = new GameObject();
newSprite.AddComponent<Rigidbody2D>();
newSprite.GetComponent<Rigidbody2D>().gravityScale = 0f;
//newSprite.AddComponent<ObjectMovement>();
newSprite.AddComponent<SpriteRenderer>();
SR = newSprite.GetComponent<SpriteRenderer>();
SR.sprite = sprite;
SR.transform.position = Camera.main.ViewportToWorldPoint(new Vector3(Random.Range(0f, 1f), Random.Range(0f, 1f), Camera.main.nearClipPlane));

Upvotes: 2

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