Unity - Tiled and optionally rotating background

using UnityEngine; using System.Collections; /* CreateBackground.cs * * Written by: Aubrey Kilian <aubreykilian (at) gmail (dot) com * Date: 2014-08-08 * See more: http://www.dociletree.co.za/ * * Purpose: * Tile a plane to be used as a background with a prefab, optionally allowing the background to rotate. * * License: Apache 2.0 * * Use as you wish, please let me know if you do. * * Usage: * * 1) Create an empty game object (plane works best) and name it something like "Background" * 2) Place the object in the center of your camera (in 2D, Orthographic mode works best, camera at 0,0,-10, object at 0,0,0) * 3) Drag this script into your Project * 4) Drag the script onto the plane * 5) Drag your image you want to use into your project * 6) Create a prefab of the image (Drag image from Project into Hierarchy, Drag image from Hierarchy to Project, Delete image from Hierarchy) * 7) Select your background object * 8) Drag the newly created prefab into "Background Image" property of script in Inspector * 9) Adjust other optional values in Inspector for script * */ public class CreateBackground : MonoBehaviour { public GameObject BackgroundImage; public bool flipEveryOther; public bool equalUpAndDown; public float ZOffset; public int NumberExtraTiles; // The script always adds 1 until we get an uneven number, to make sure we have a tile in the middle always public bool RotateBackground; public bool RotateAntiClockwise; public float RotateSpeed; private int ReverseAdjuster = -1; void FixedUpdate () { if(RotateBackground && BackgroundImage && RotateSpeed > 0) transform.RotateAround (new Vector3 (0, 0, 0), new Vector3 (0, 0, 2), RotateSpeed * Time.deltaTime * ReverseAdjuster); } void Start () { if(BackgroundImage) doBackground (); if(RotateAntiClockwise) ReverseAdjuster = 1; } void doBackground () { Vector3 topRight = Camera.main.ScreenToWorldPoint (new Vector3 (Screen.width, Screen.height, 0)); Vector3 middle = Camera.main.ScreenToWorldPoint (new Vector3 (Screen.width/2, Screen.height/2, 0)); Vector3 bgSize = BackgroundImage.renderer.bounds.size; int numWide = Mathf.CeilToInt((topRight.x * 2) / bgSize.x ) + 1 + NumberExtraTiles; int numHigh = Mathf.CeilToInt((topRight.y * 2) / bgSize.y ) + 1 + NumberExtraTiles; while(numWide % 2 < 1) { numWide += 1; } while(numHigh % 2 < 1) { numHigh += 1; } if(equalUpAndDown) { numHigh = (numHigh > numWide) ? numHigh : numWide; numWide = numHigh; } float endX = middle.x + (Mathf.Round(numWide / 2) * bgSize.x); float endY = middle.y + (Mathf.Round(numHigh / 2) * bgSize.y); float startX = endX * -1; float startY = endY * -1; for(int countX = 0; countX<numWide; countX++) { float i = countX * bgSize.x + startX; for(int countY = 0; countY < numHigh; countY++) { float j = countY * bgSize.y + startY; Quaternion quat = new Quaternion (); quat = Quaternion.identity; if(flipEveryOther && (countX + countY) % 2 < 1) { quat = Quaternion.Euler (new Vector3 (0, 0, 180)); } Vector3 NewPosition = new Vector3(i, j, ZOffset); GameObject Go = Instantiate (BackgroundImage) as GameObject; Go.transform.parent = transform; Go.transform.position = NewPosition; Go.transform.rotation = quat; } } } }