WaterFlush/Assets/AIPagedLod/Scripts/Loader/B3dmFileLoader.cs

/*************************************************************************
 *  Copyright © 2018-2023 Liwen All rights reserved.
 *------------------------------------------------------------------------
 *  File         :  B3dmFileLoader.cs
 *  Description  :  load b3dm format tile info 
 *------------------------------------------------------------------------
 *  Author       :  Liwen
 *  Version      :  1.0.0
 *  Date         :  1/5/2019
 *  Description  :  Initial development version.
 *************************************************************************/

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using System;
using System.Runtime.InteropServices;
using System.Linq;
using System.IO;

namespace AIPagedLod
{
    public class B3dmFileLoader : PagedLodFileLoader
    {
        public B3dmFileLoader()
        {

        }
        public B3dmFileLoader(string fileName)
        {
            mFileName = fileName;
        }

        public override void LoadObjectMeshInfo()
        {
            IntPtr ptr = B3dmLoader.OpenB3dmFile(mFileName);
            if (ptr == IntPtr.Zero)
            {
                Debug.LogError("OpenB3dmFile failure " + mFileName);
                return;
            }
            LoadObjectMeshInfoFromPtr(ptr);
            B3dmLoader.CloseB3dmFile(ptr);
        }

        private void LoadObjectMeshInfoFromPtr(IntPtr ptr)
        {
            int meshCount = B3dmLoader.GetMeshCount(ptr);
            for (int i = 0; i < meshCount; ++i)
            {
                TileObjectInfo info = new TileObjectInfo();
                info.mVertices = B3dmLoader.GetVertexs(ptr, i, mIsDaJiangData);
                info.mTriangles = B3dmLoader.GetTriangles(ptr, i, mIsDaJiangData);
                info.mTexCoords = B3dmLoader.GetTexCoords(ptr, i);
                info.mImageResolutionS = B3dmLoader.GetImageResolutionS(ptr, i);
                info.mImageResolutionT = B3dmLoader.GetImageResolutionT(ptr, i);
                info.mImageData = B3dmLoader.GetImageData(ptr, i);
                info.mTextureFormat = B3dmLoader.GetImageFormat(ptr, i);
                info.mUnityTextureFormat = TextureFormat.RGBA32;
                mObjectInfoList.Add(info);
            }
        }

        public void LoadObjectMeshInfoFromData(byte[] data)
        {
            IntPtr ptr = B3dmLoader.LoadB3dmFromData(ref data[0], data.Length);
            if (ptr == IntPtr.Zero)
            {
                Debug.LogError("OpenB3dmFile failure--------------");
                return;
            }
            LoadObjectMeshInfoFromPtr(ptr);
            B3dmLoader.CloseB3dmFile(ptr);
        }
    }
}