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XCEngine/docs/api/math/frustum/intersects-sphere.md
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Frustum::Intersects

bool Intersects(const Sphere& sphere) const

检测球体是否与视锥体相交。判断方式为:依次计算球心到 6 个裁剪平面的有符号距离,若任意一个距离小于 -radius(即球体完全在平面外侧),则两者不相交;否则认为相交。

注意:此方法与 Contains(Sphere) 的区别在于——Contains 要求球体完全在视锥内,而 Intersects 只要有任意重叠就返回 true

参数:

  • sphere - 要检测的球体,包含圆心 center 和半径 radius

返回: bool - 视锥与球体相交返回 true,否则返回 false

线程安全: (只读操作,不修改状态)

复杂度: O(6),即遍历 6 个裁剪平面

示例:

#include <XCEngine/Core/Math/Frustum.h>
#include <XCEngine/Core/Math/Sphere.h>

void CheckSphereIntersection(const Frustum& frustum, const Sphere& sphere) {
    if (frustum.Intersects(sphere)) {
        // 球体与视锥相交
        Render();
    }
}

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