//更新笔刷，用于picker中的所选元素发生改变的时候使用
public void UpdateBrush(MeshFilter aMeshFilter, MeshRenderer aMeshRenderer)
{
if (brush != null)
{
brush.UpdateBrush(aMeshFilter, aMeshRenderer);
}
}
void CreateBrush()
{
//获得由picker选中的笔刷对象
BasicBlock block = voxelMap.GetBlockBrush;
if (block != null)
{
GameObject go = new GameObject("Brush");
go.transform.SetParent(voxelMap.transform);
//笔刷中保存笔刷实例的引用
brush = go.AddComponent <BlockBrush> ();
brush.m_meshFilter = go.AddComponent <MeshFilter> ();
brush.m_meshRender = go.AddComponent <MeshRenderer> ();
brush.m_tag = block.m_tag;
//使用brush的方法对笔刷实例的组件进行修改
brush.m_brushSize = voxelMap.GetBlockSize();
brush.UpdateBrush(block.m_gameobject.GetComponentInChildren <MeshFilter> (),
block.m_gameobject.GetComponentInChildren <MeshRenderer> ());
}
}
