錆びて減らします。
これは、cのコードと同様に、錆の関数の関数です。

[さび]
`` `
fn matrix_from_normal（正常：＆[f32; 3]） - > [[f32;3];3] {
    MUTを結果とさせます：[[f32;3];3] = [[0F32;3];3];
    let length =（normal [0] * normal [0] + normor [1] * normal [1] + normal [2] * ermorm [2]）。sqrt（）as f32;
    INV_LENGTH =（1F32） / LEENGTH;
    result [0] [0] = normal [0] * inv_length;
    result [0] [1] = normal [1] * inv_length;
    result [0] [2] = normal [2] * inv_length;
    
    result [1] [0] = -normal [1] * inv_length;
    result [1] [1] = normal [0] * inv_length;
    結果[1] [2] = 0F32;
    
    result [2] [0] = -normal [2] * inv_length;
    結果[2] [1] = 0f32;
    result [2] [2] = normal [0] * inv_length;
    
    返品結果;
}
`` `