79 lines
3.0 KiB
Python
79 lines
3.0 KiB
Python
import os
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import subprocess
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import json
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import shutil
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import logging
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class ConvertOBJ:
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def __init__(self, output_dir: str):
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self.output_dir = output_dir
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self.logger = logging.getLogger('UAV_Preprocess.ConvertOBJ')
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def convert_grid_obj(self, grid_points):
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"""转换每个网格的OBJ文件为OSGB格式"""
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os.makedirs(os.path.join(self.output_dir, "osgb"), exist_ok=True)
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for grid_id in grid_points.keys():
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try:
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self._convert_single_grid(grid_id)
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except Exception as e:
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self.logger.error(f"网格 {grid_id} 转换失败: {str(e)}")
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def _convert_single_grid(self, grid_id):
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"""转换单个网格的OBJ文件"""
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# 1. 构建相关路径
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grid_name = f"grid_{grid_id[0]}_{grid_id[1]}"
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project_dir = os.path.join(self.output_dir, grid_name, "project")
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texturing_dir = os.path.join(project_dir, "odm_texturing")
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opensfm_dir = os.path.join(project_dir, "opensfm")
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# 检查输入文件是否存在
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obj_file = os.path.join(texturing_dir, "odm_textured_model_geo.obj")
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if not os.path.exists(obj_file):
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raise FileNotFoundError(f"找不到OBJ文件: {obj_file}")
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# 2. 执行格式转换
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self.logger.info(f"开始转换网格 {grid_id} 的OBJ文件")
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output_osgb = os.path.join(texturing_dir, "Tile.osgb")
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cmd = (
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f"osgconv --compressed --smooth --fix-transparency -o 0,1,0-0,0,-1 "
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f"{obj_file} {output_osgb}"
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)
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try:
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subprocess.run(cmd, shell=True, check=True, cwd=texturing_dir)
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except subprocess.CalledProcessError as e:
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raise RuntimeError(f"OSGB转换失败: {str(e)}")
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# 3. 读取地理信息
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ref_lla_file = os.path.join(opensfm_dir, "reference_lla.json")
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with open(ref_lla_file, 'r') as f:
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ref_lla = json.load(f)
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# 4. 创建OSGB目录结构
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osgb_dir = os.path.join(self.output_dir, "osgb", grid_name)
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data_dir = os.path.join(osgb_dir, "Data")
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tile_dir = os.path.join(data_dir, "Tile")
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os.makedirs(tile_dir, exist_ok=True)
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# 5. 创建metadata.xml
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metadata_content = f"""<?xml version="1.0" encoding="utf-8"?>
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<ModelMetadata version="1">
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<!--Spatial Reference System-->
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<SRS>EPSG:4326</SRS>
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<!--Origin in Spatial Reference System-->
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<SRSOrigin>{ref_lla['longitude']},{ref_lla['latitude']},0.000000</SRSOrigin>
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<Texture>
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<ColorSource>Visible</ColorSource>
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</Texture>
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</ModelMetadata>"""
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metadata_file = os.path.join(osgb_dir, "metadata.xml")
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with open(metadata_file, 'w', encoding='utf-8') as f:
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f.write(metadata_content)
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# 6. 复制OSGB文件
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shutil.copy2(output_osgb, os.path.join(tile_dir, "Tile.osgb"))
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self.logger.info(f"网格 {grid_id} 转换完成")
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