chemanim
ChemAnim
把中文化学动画要求转换为可校验的 Manim 场景:DeepSeek 负责理解需求并给出英文规范名称和候选 isomeric SMILES;程序再查询 PubChem,用 Morgan 指纹比较候选结构,采用数据库结构,并由 RDKit 校验分子式、形式电荷和方程式守恒。Manim 只读取最终 JSON,不执行模型生成的代码。
准备
需要 Python 3.12 和 DeepSeek API 密钥。方程式使用 Unicode 化学下标显示,不再依赖 MiKTeX。首次安装:
cd C:\Users\i\Documents\chemenv
py -3.12 -m venv .venv
.\.venv\Scripts\python.exe -m pip install -e .不要把密钥写进源码或 .env。在当前 PowerShell 会话中设置:
$secureKey = Read-Host "DeepSeek API Key" -AsSecureString
$env:DEEPSEEK_API_KEY = [Net.NetworkCredential]::new("", $secureKey).Password如果要跨新终端保存,请在 Windows 用户环境变量中添加 DEEPSEEK_API_KEY,然后重新打开 PowerShell。检查环境:
.\check_environment.ps1Related MCP server: ChemCP
使用
先只生成并检查场景、结构图和核验报告:
.\.venv\Scripts\chemanim.exe "演示乙烯与溴的加成反应。生成物为1,2-二溴乙烷,展示所有物质的结构式。" --no-render渲染二维或三维动画:
.\.venv\Scripts\chemanim.exe "演示乙烯与溴的加成反应。生成物为1,2-二溴乙烷。" --quality high
.\.venv\Scripts\chemanim.exe "演示乙烯与溴的加成反应。生成物为1,2-二溴乙烷。" --quality high --structure-mode 3d--structure-mode 3d 默认自动启用 OpenGL/GPU;二维结构默认使用更兼容的 Cairo。快速预览建议使用 --quality medium,需要手动选择时可加 --renderer opengl 或 --renderer cairo。
二维模式会让同一画面中的结构式共享比例尺,小分子不再被强行放大到与复杂分子相同的宽度。
输出位于:
build/scene.json:最终场景及核验摘要build/verification.json:PubChem CID、InChIKey、候选/核验 SMILES 和 Morgan Tanimoto 相似度build/molecule_*.svg或场景中的 3D 原子/键数据media/:Manim 视频
流程会在 DeepSeek JSON 无效时最多自动回传修正三次。PubChem 暂时不可用时,会保留候选结构并进行本地 RDKit 校验;未通过校验则停止,不渲染错误结果。
默认使用响应更快的 deepseek-v4-flash,化学结构仍由 PubChem 和 RDKit 校验。需要更强规划时可添加 --model deepseek-v4-pro --request-timeout 180。
更多示例
.\.venv\Scripts\chemanim.exe "演示甲苯被氧气选择性氧化为苯甲醛和水,展示全部结构式。" --quality medium
.\.venv\Scripts\chemanim.exe "制作阿莫西林半合成原理动画,保持正确立体化学,不要虚构实验条件。" --no-renderMCP 服务器
项目提供标准 stdio MCP 入口:
.\.venv\Scripts\chemanim-mcp.exeMCP 客户端配置示例(密钥由客户端进程继承,不要写进 JSON):
{
"mcpServers": {
"chemanim": {
"command": "C:\\Users\\i\\Documents\\chemenv\\.venv\\Scripts\\chemanim-mcp.exe"
}
}
}服务器暴露 generate_chemistry_animation 工具,参数包括 prompt、quality、structure_mode、render、model 和 request_timeout。它只调用受约束的 ChemAnim CLI,不执行模型提交的 Python 代码。
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