Thanks everyone,
Mastaba, how do I find E in your solution ? That''s the point on Line(AB) that goes through my point C at a right angle to AB.
Thanks.
Point->Line-Segment Distance ?
I don't really like to give explicit code, as I'd rather see people learn the math behind the code. I'll clearly give you a hint however.
Good Luck!
[edited by - Mastaba on July 3, 2003 8:53:33 PM]
Good Luck!
[edited by - Mastaba on July 3, 2003 8:53:33 PM]
point PointOnSegment(point C, point A, point B){ point D = (C.x - A.x, C.y - A.y); // D = C - A point E = (B.x - A.x, B.y - A.y); // E = B - A float DdotE (D.x * E.x + D.y * E.y); // DdotE = D . E float e2 = E.x*E.x + E.y*E.y; // e2 = E . E if (DdotE < 0.0f) return A; if (DdotE > e2) return B; DdotE /= e2; // DdotE = (D . E) / (E . E) point F = (E.x * DdotE, E.y * DdotE); // F = E * (D . E) / (E . E) return point(A.x + F.x, A.y + F.y); // return A + F}This topic is closed to new replies.
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