using UnityEngine;

/// <summary>
/// 特殊处理--针对自己组合生成的网格,对rander的lightmap信息重新设定
/// 这里有个潜规则:关联的网格名字中包含有lightmap的索引ID
/// </summary>
public class CombineMeshLightmap : MonoBehaviour
{
    private void Awake()
    {
        var mf = GetComponent<MeshFilter>();
        var render = GetComponent<MeshRenderer>();
        if (render != null)
        {
            int litIdx = 0;
            if (mf != null && mf.sharedMesh != null)
            {
                int idx = mf.sharedMesh.name.LastIndexOf("_");
                if (idx >= 0)
                {
                    int.TryParse(mf.sharedMesh.name.Substring(idx), out litIdx);
                }
            }
            render.lightmapIndex = litIdx < 0 ? 0 : litIdx;
            render.lightmapScaleOffset = new Vector4(1, 1, 0, 0);
        }
    }

}