aspect360：计算两个角度之间的角度

此crate基于ring360库，用于计算目标角度与或球或角度/或球的数组之间的角度。

此crate重新导出ring360，因此不需要单独安装它。

计算单个角度匹配

/// Cast two 64-bit floats to Ring360 values 
let angle_1 = 74.7.to_360(); 
let angle_2 = 164.4.to_360();

// calculate the aspect to ±90º within a 2º orb
let result = angle_1.calc_aspect(&angle_2, 90.0, 2.0);

println!("{:.1}º and {:.1}º are {:.1}º apart, {:.1}º from the target aspect of {:.1}º with an orb of {:.1}. Matched: {}",
    angle_1.degrees(),
    angle_2.degrees(),
    result.aspect(),
    result.distance(),
    result.target(),
    result.orb(),
    result.matched(),
);
/// Should read: 74.7º and 164.4º are 89.7º apart, -0.3 from the target aspect of 90.0º with an orb of 2.0. Match: true

从多个选项中找到第一个角度匹配

let lng_1 = 98.202928;
let lng_2 = 249.325729;

let angle_1 = lng_1.to_360();
let angle_2 = lng_2.to_360();

// List target aspect as pairs of target angles and orbs
let targets = [
  (0.0, 8.0), // conjunction
  (90.0, 5.0), // square
  (120.0, 3.0), // trine
  (180.0, 4.0) // opposition
].to_aspect_orbs(); // cast the tuple pairs to a vector of AspectOrb structs

let aspect_match_opt = angle_1.find_aspect(&angle_2, &targets);
if let Some(aspect_match) = aspect_match_opt {

  println!(
    "{:.6}º and  {:.6}º have an an aspect match of {:.0}º within {:.6}º",
    angle_1,
    angle_2,
    aspect_match.target(),
    aspect_match.distance(),
  );
  // Should read: 98.202928º and  249.325729º have an an aspect match of 150º within 1.122801º
}

在角度定义可能重叠的情况下找到最佳匹配的角度

在实际应用中，如果角度定义不能重叠，find_aspect()方法将更有效，因为它将返回第一个匹配的AspectOrb对象。但是，当定义重叠时（例如，六分相仅比七分相远约8.57度），第一个匹配可能不是最佳匹配，如下例所示。

  let lng_1 = 192.928202;
  let lng_2 = 249.325729;

  let angle_1 = lng_1.to_360();
  let angle_2 = lng_2.to_360();

  let targets = [
    (30.0, 5.0), // semisextile
    (45.0, 8.0), // semisquare
    (360.0 / 7.0, 9.0), // septile 360/7 = approx. 51.428571
    (60.0, 8.0), // sextile
    (90.0, 8.0), // square
    (120.0, 8.0), // trine
    (150.0, 10.0) // quincunx
  ].to_aspect_orbs(); // cast to a vector of AspectOrb structs

  let aspect_matches = angle_1.find_aspects(&angle_2, &targets);
  println!("{} aspects have been matched within the specified ranges", aspect_matches.len());
  // yields a vector with 2 matched AspectResults 
  // Two aspects are matched.
  

  let first_match = angle_1.find_aspect(&angle_2, &targets);
  // yields the first matched aspect even if it's not best aspect. In this case a septile with a wide orb of 9.0
  println!("The first match is {}º from the target aspect of {}º", first_match.unwrap().divergence(), first_match.unwrap().target());
  // prints: The first match is 4.968955571428566º from the target aspect of 51.42857142857143º

  // However, the best match is sextile and not septile, which would have been matched first
  let best_aspect_match = angle_1.find_best_aspect(&angle_2, &targets);
  // Yields a sextile
  
  println!("The best match is {}º from the target aspect of {}º", best_aspect_match.unwrap().divergence(), best_aspect_match.unwrap().target());
  // prints: The best match is 3.6024730000000034º from the target aspect of 60º

结构体

AspectResult

实例方法

• aspect()-> f64 两个角度的角度，无论它们是否匹配。
• distance()-> f64 从目标角度的角度距离。可能产生负值
• divergence()-> f64 从目标角度的绝对角度距离。可能只产生零或正值
• target()-> f64 目标角度，始终是对称的，例如90度将匹配±90或±270
• matched()-> bool 如果角度与目标在指定的或球内进行角度匹配，则为真。
• orb() -> f64 角度匹配的容差

AspectOrb

一个简单的元组结构体，包含目标角度和或球，都是64位浮点数。任何包含表示目标角度和或球的f64值数组的或向量都可以通过to_aspect_orbs()转换为AspectOrb对象。

实例方法

• target()-> f64 目标角度
• orb() -> f64 角度匹配的容差

特质

Aspect360

此特质仅在Ring360中实现，但任何64位浮点数都可以通过.to_360()扩展方法和以_f64结尾的变异方法转换为Ring360，这些方法接受正常的f64值作为比较角度，这些角度将在0度到360度的范围内进行归一化。

• calc_aspect(other: &Ring360, target: f64, orb: f64) -> AspectResult
• is_aspected(other: &Ring360, target: f64, orb: f64) -> bool
• calc_aspect_f64(other: f64, target: f64, orb: f64) -> AspectResult
• *find_aspect(other: &Ring360, targets: &[AspectOrb]) -> Option
• *find_aspects(other: &Ring360, targets: &[AspectOrb]) -> Vec
• *find_best_aspect(other: &Ring360, targets: &[AspectOrb]) -> Option
• is_aspected_f64(other: f64, target: f64, orb: f64) -> bool

开发笔记

版本 0.1.4 引入了两个新方法 find_aspects() 和 find_best_aspect()，用于处理方面定义（AspectOrb）可能重叠的情况。

版本 0.1.7 添加了一个新的特质 ToAspectOrb，其中包含一个 to_aspect_orbs 方法，用于将一个简单的 (f64, f64) 元组数组转换为 AspectOrb() 结构体向量，以供 find_aspect()、find_best_aspect() 和 find_aspects() 使用。这减少了样板代码。