The avatar for @heganjie
Bruce He
Biu biu biu...
Published
Edited
Oct 12, 2021
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distance(113.11529, 23.015409, 113.119871, 23.015425) // 季华园宽度，约为 460m
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move(vec2.create(), [113.115299, 23.015409], 460, 0)
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distance(113.115353, 23.017379, 113.1114501953125, 23.017377853393555)
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# 计算目标点相对起点的方位（仅支持正负 90 度内）

设地心为点 O，根据起点 A、目标点 D ，得目标点方位 radCompass，东方为 0°

1. 用 OA 为法线，以 A 为起点定义平面，求 OD 与平面交点 OD'
2. 设 uAD = normalize(AD')，用两次 cross 算得北方位和东方位，用 uAD' 分别与这两个方位做映射得 x,y
3. 通过 atan2 算得方位

直线与平面交点算法：
https://www.scratchapixel.com/lessons/3d-basic-rendering/minimal-ray-tracer-rendering-simple-shapes/ray-plane-and-ray-disk-intersection
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(getCompass(113.108885, 23.017363, 113.149273, 23.033727) * 180) / Math.PI
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