CGFloat verticalOverlapRatioOfVectors(simd_float2 vector1, simd_float2 vector2) {
 // 計(jì)算向量長(zhǎng)度
 CGFloat length1 = simd_length(vector1);
 CGFloat length2 = simd_length(vector2);

 // 計(jì)算向量?jī)?nèi)積（點(diǎn)積）
 CGFloat dotProduct = simd_dot(vector1, vector2);

 // 計(jì)算向量夾角的余弦值和正弦值
 CGFloat cosAngle = dotProduct / (length1 * length2);
 CGFloat sinAngle = sqrt(1 - cosAngle * cosAngle);

 // 計(jì)算重合比例
 return sinAngle;
}