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本帖最后由 hbghlyj 于 2021-11-21 19:00 编辑 asymptote的文档中- real incircle(pair a, pair b, pair c, pair d);
- returns a positive (negative) value if d lies inside (outside) the circle passing through the counterclockwise-oriented points a,b,c or zero if d lies on the this circle. The value returned is the determinant
- |a.x a.y a.x^2+a.y^2 1|
- |b.x b.y b.x^2+b.y^2 1|
- |c.x c.y c.x^2+c.y^2 1|
- |d.x d.y d.x^2+d.y^2 1|
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