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# 3d Question

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How do you find the average plane from a set of points. I know there was a paper on it but I cant find it anywhere on the next if you know where it is let me know, it was called “Finding the Average Plane for a Set of Points” by Niki (http://www.thecore.de/avgplane.pdf). the problme is the link is broken. thanks Reality Makes Me XIC I hack code: passion is my feul. Use my programs, experience genius. http://www.x-i-c.com/

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 // Create a plane from 3 pointsGPlane* Game3D::createPlane( GVector* a, GVector* b, GVector* c ){ GPlane* plane = new GPlane(); GVector q; GVector v; q.x = b->x - a->x; v.x = b->x - c->x; q.y = b->y - a->y; v.x = b->y - c->y; q.z = b->y - a->y; v.x = b->z - c->z; plane->normal = crossProduct( &q, &v ); normalizeVector( &plane->normal ); // calculate distance to origin plane->distance = dotProduct (&plane->normal, a); // you could also use b or c return plane;}GVector Game3D::crossProduct( GVector* v1, GVector* v2 ){ GVector result; result.x = ( v1->y * v2->z ) - ( v1->z * v2->y ); result.y = ( v1->z * v2->x ) - ( v1->x * v2->z ); result.z = ( v1->x * v2->y ) - ( v1->y * v2->x ); return result;} float Game3D::dotProduct( GVector* v1, GVector* v2 ){ float dot; dot = (v1->x * v2->x + v1->y * v2->y + v1->z * v2->z); return dot;}void Game3D::normalizeVector( GVector* vector ){ float length = (float)sqrt( (vector->x*vector->x) + (vector->y*vector->y) + (vector->z*vector->z) ); vector->x /= length; vector->y /= length; vector->z /= length;}

Seeya
Krippy

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