code/cube3d/training/expand_ldr.py

import os
import numpy as np

def parse_matrix_and_pos(tokens):
    """解析 1 行中的 位置和矩阵"""
    color = tokens[1]
    pos = np.array([float(tokens[2]), float(tokens[3]), float(tokens[4])])
    mat = np.array([
        [float(tokens[5]), float(tokens[6]), float(tokens[7])],
        [float(tokens[8]), float(tokens[9]), float(tokens[10])],
        [float(tokens[11]), float(tokens[12]), float(tokens[13])]
    ])
    filename = " ".join(tokens[14:]).upper()
    return color, pos, mat, filename

def apply_transform(pos_parent, mat_parent, pos_child, mat_child):
    """位置相加 & 矩阵相乘"""
    new_pos = pos_parent + mat_parent.dot(pos_child)
    new_mat = mat_parent.dot(mat_child)
    return new_pos, new_mat

def expand_submodel(line, submodels):
    """展开一个子模型引用"""
    tokens = line.strip().split()
    color, pos, mat, filename = parse_matrix_and_pos(tokens)

    if filename.lower().endswith(".dat"):  # 普通零件，不展开
        return [line]

    if filename not in submodels:
        print(f"⚠️ 未找到子模型定义: {filename}")
        return []

    expanded_lines = []
    for subline in submodels[filename]:
        if not subline.strip().startswith("1 "):  # 保留注释等
            expanded_lines.append(subline)
            continue
        stokens = subline.strip().split()
        scolor, spos, smat, sfile = parse_matrix_and_pos(stokens)

        new_pos, new_mat = apply_transform(pos, mat, spos, smat)
        new_line = "1 {} {:.3f} {:.3f} {:.3f} {:.6f} {:.6f} {:.6f} {:.6f} {:.6f} {:.6f} {:.6f} {:.6f} {:.6f} {}".format(
            scolor,
            new_pos[0], new_pos[1], new_pos[2],
            new_mat[0,0], new_mat[0,1], new_mat[0,2],
            new_mat[1,0], new_mat[1,1], new_mat[1,2],
            new_mat[2,0], new_mat[2,1], new_mat[2,2],
            sfile
        )
        expanded_lines.append(new_line)
    return expanded_lines

def expand_all(main_lines, submodels):
    """不断展开 main_lines，直到所有 1 行的子模型引用都是以 .dat 结尾"""
    changed = True
    while changed:
        changed = False
        new_lines = []
        for line in main_lines:
            if line.strip().startswith("1 "):
                tokens = line.strip().split()
                filename = " ".join(tokens[14:]).upper()
                if not filename.lower().endswith(".dat"):
                    if filename in submodels:
                        expanded = expand_submodel(line, submodels)
                        new_lines.extend(expanded)
                        changed = True
                        continue
            new_lines.append(line.strip())
        main_lines = new_lines
    return main_lines

def process_ldr(input_file, output_file):
    with open(input_file, "r", encoding="utf-8") as f:
        lines = f.readlines()

    # 找第一个 NOFILE
    nofile_idx = None
    for i, line in enumerate(lines):
        if line.strip().upper().startswith("0 NOFILE"):
            nofile_idx = i
            break
    # 如果没有找到 0 NOFILE，说明没有子模型，直接保存文件
    if nofile_idx is None:
        print(f"⚠️ {input_file} 未找到 0 NOFILE，文件没有子模型，直接保存")
        with open(output_file, "w", encoding="utf-8") as f:
            f.writelines(lines)  # 直接保存原始文件
        return

    main_lines = lines[:nofile_idx]
    sub_lines = lines[nofile_idx+1:]

    # 收集子模型定义
    submodels = {}
    cur_name = None
    cur_buf = []
    for line in sub_lines:
        if line.strip().upper().startswith("0 FILE"):
            if cur_name and cur_buf:
                submodels[cur_name.upper()] = cur_buf
            cur_name = line.strip().split(maxsplit=2)[-1].upper()
            cur_buf = []
        elif line.strip().upper().startswith("0 NOFILE"):
            if cur_name and cur_buf:
                submodels[cur_name.upper()] = cur_buf
            cur_name = None
            cur_buf = []
        else:
            if cur_name is not None:
                cur_buf.append(line.strip())
    if cur_name and cur_buf:
        submodels[cur_name.upper()] = cur_buf

    # 处理主文件，递归展开
    output_lines = expand_all(main_lines, submodels)

    os.makedirs(os.path.dirname(output_file), exist_ok=True)
    with open(output_file, "w", encoding="utf-8") as f:
        for l in output_lines:
            f.write(l + "\n")

    #print(f"✅ 已展开并保存到 {output_file}")
import shutil
def process_all_ldr(input_root, output_root):
    """遍历 input_root 下所有 .ldr 文件，并保存到 output_root 下相同路径，同时复制同名 txt 和 jpeg 文件"""
    for dirpath, _, filenames in os.walk(input_root):
        for filename in filenames:
            if filename.lower().endswith(".ldr"):
                in_file = os.path.join(dirpath, filename)
                rel_path = os.path.relpath(in_file, input_root)
                out_file = os.path.join(output_root, rel_path)
                
                # 处理 ldr 文件
                process_ldr(in_file, out_file)

                # 基础文件名，不含扩展名
                base_name = os.path.splitext(filename)[0]
                


if __name__ == "__main__":
    input_root = "/public/home/wangshuo/gap/assembly/data/car_1k/subset_bottom_300/ldr_rot_test"
    output_root = "/public/home/wangshuo/gap/assembly/data/car_1k/subset_bottom_300/ldr_rot_expand_test"
    process_all_ldr(input_root, output_root)