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46 lines
1.1 KiB
46 lines
1.1 KiB
3 years ago
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using System.Collections;
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using System.Collections.Generic;
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using UnityEngine;
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[ExecuteInEditMode]
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public class sprite_sheet : MonoBehaviour
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{
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public int _uvTieX = 1;
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public int _uvTieY = 1;
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public int _fps = 10;
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private Vector2 _size;
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private Renderer _myRenderer;
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private int _lastIndex = -1;
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void Start ()
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{
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_size = new Vector2 (1.0f / _uvTieX , 1.0f / _uvTieY);
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_myRenderer = GetComponent<Renderer>();
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if(_myRenderer == null)
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enabled = false;
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}
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// Update is called once per frame
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void Update()
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{
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// Calculate index
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int index = (int)(Time.timeSinceLevelLoad * _fps) % (_uvTieX * _uvTieY);
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if(index != _lastIndex)
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{
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// split into horizontal and vertical index
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int uIndex = index % _uvTieX;
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int vIndex = index / _uvTieY;
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// build offset
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// v coordinate is the bottom of the image in opengl so we need to invert.
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Vector2 offset = new Vector2 (uIndex * _size.x, 1.0f - _size.y - vIndex * _size.y);
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_myRenderer.material.SetTextureOffset ("_MainTex", offset);
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_myRenderer.material.SetTextureScale ("_MainTex", _size);
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_lastIndex = index;
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}
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}
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}
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