double2_add double2_collinear double2_eq double2_make double2_out double2_set double2segm_interpolate double3_add double3_collinear double3_eq double3_make double3_out double3_set double3segm_interpolate double4_add double4_collinear double4_eq double4_make double4_out double4_set double4segm_interpolate

double4_collinear() bool double4_collinear ( const double4 *  x1, const double4 *  x2, const double4 *  x3, double  ratio  ) Return true if the three values are collinear. Parameters [in] x1,x2,x3 Input values [in] ratio Value in [0,1] representing the duration of the timestamps associated to x1 and x2 divided by the duration of the timestamps associated to x1 and x3 Precondition The function supposes that the segments are not constant Note Function used for normalizing temporal values by removing redundant instants