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sync: try to impl intersection detection for rectangles

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Shuo Feng 2024-02-20 20:45:20 -05:00
parent 0006e3f0f4
commit 22a96dce29
Signed by: sfeng
GPG key ID: 1E83AE6CD1C037B1
1 changed files with 13 additions and 1 deletions
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14
src/Geometry.cc
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@ -13,4 +13,16 @@ bool Sphere::intersect(const Ray &r) const {
return b * b - 4 * a * c >= 0; return b * b - 4 * a * c >= 0;
} }
bool Rectangle::intersect(const Ray &r) const { return false; } bool Rectangle::intersect(const Ray &r) const {
Vector3f p1p2 = corners.col(1) - corners.col(0);
Vector3f p2p3 = corners.col(2) - corners.col(1);
Vector3f p3p1 = corners.col(0) - corners.col(2);
Vector3f p1p4 = corners.col(3) - corners.col(0);
Vector3f p4p3 = corners.col(2) - corners.col(3);
Vector3f n = -p1p2.cross(p2p3) / p1p2.cross(p2p3).norm();
if (n.dot(r.getOrigin() + r.getDirection()) == 0) {
}
return false;
}