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| author | Juan Linietsky <reduzio@gmail.com> | 2017-04-08 22:38:11 -0300 |
|---|---|---|
| committer | Juan Linietsky <reduzio@gmail.com> | 2017-04-08 22:40:06 -0300 |
| commit | 4286aef69313e048fa91710c35456c08a252fd3c (patch) | |
| tree | 866ecba1e556f587aed886166afea79a47487248 /core/math | |
| parent | 6075dfe511728ab3fb59915a18ca99e5b8789d8b (diff) | |
Particle system is complete. Rejoice!
Diffstat (limited to 'core/math')
| -rw-r--r-- | core/math/geometry.h | 21 |
1 files changed, 11 insertions, 10 deletions
diff --git a/core/math/geometry.h b/core/math/geometry.h index 2469e799a0..909d8164c3 100644 --- a/core/math/geometry.h +++ b/core/math/geometry.h @@ -105,23 +105,23 @@ public: } static void get_closest_points_between_segments(const Vector3 &p1, const Vector3 &p2, const Vector3 &q1, const Vector3 &q2, Vector3 &c1, Vector3 &c2) { -#if 0 - //do the function 'd' as defined by pb. I think is is dot product of some sort +#if 1 +//do the function 'd' as defined by pb. I think is is dot product of some sort #define d_of(m, n, o, p) ((m.x - n.x) * (o.x - p.x) + (m.y - n.y) * (o.y - p.y) + (m.z - n.z) * (o.z - p.z)) //calculate the parametric position on the 2 curves, mua and mub - real_t mua = ( d_of(p1,q1,q2,q1) * d_of(q2,q1,p2,p1) - d_of(p1,q1,p2,p1) * d_of(q2,q1,q2,q1) ) / ( d_of(p2,p1,p2,p1) * d_of(q2,q1,q2,q1) - d_of(q2,q1,p2,p1) * d_of(q2,q1,p2,p1) ); - real_t mub = ( d_of(p1,q1,q2,q1) + mua * d_of(q2,q1,p2,p1) ) / d_of(q2,q1,q2,q1); + real_t mua = (d_of(p1, q1, q2, q1) * d_of(q2, q1, p2, p1) - d_of(p1, q1, p2, p1) * d_of(q2, q1, q2, q1)) / (d_of(p2, p1, p2, p1) * d_of(q2, q1, q2, q1) - d_of(q2, q1, p2, p1) * d_of(q2, q1, p2, p1)); + real_t mub = (d_of(p1, q1, q2, q1) + mua * d_of(q2, q1, p2, p1)) / d_of(q2, q1, q2, q1); //clip the value between [0..1] constraining the solution to lie on the original curves if (mua < 0) mua = 0; if (mub < 0) mub = 0; if (mua > 1) mua = 1; if (mub > 1) mub = 1; - c1 = p1.linear_interpolate(p2,mua); - c2 = q1.linear_interpolate(q2,mub); -#endif - + c1 = p1.linear_interpolate(p2, mua); + c2 = q1.linear_interpolate(q2, mub); +#else + //this is broken do not use Vector3 u = p2 - p1; Vector3 v = q2 - q1; Vector3 w = p1 - q1; @@ -144,8 +144,9 @@ public: c1 = w + sc * u; c2 = w + tc * v; - // get the difference of the two closest points - //Vector dP = w + (sc * u) - (tc * v); // = L1(sc) - L2(tc) +// get the difference of the two closest points +//Vector dP = w + (sc * u) - (tc * v); // = L1(sc) - L2(tc) +#endif } static real_t get_closest_distance_between_segments(const Vector3 &p_from_a, const Vector3 &p_to_a, const Vector3 &p_from_b, const Vector3 &p_to_b) { |