Functions | |
void | Edit_NURBS_Curve (HC_KEY key, int cp_offset, int knot_offset, int cp_count, int knot_count, const HC_POINT *control_points, const float *weights, const float *knots) |
void | DEdit_NURBS_Curve (HC_KEY key, int cp_offset, int knot_offset, int cp_count, int knot_count, const HCD_POINT *control_points, const double *weights, const double *knots) |
void Edit_NURBS_Curve | ( | HC_KEY | key, | |
int | cp_offset, | |||
int | knot_offset, | |||
int | cp_count, | |||
int | knot_count, | |||
const HC_POINT * | control_points, | |||
const float * | weights, | |||
const float * | knots | |||
) |
Modifies the control points, weights, and/or knots of a previously-inserted NURBS curve.
key | - The numeric identifier returned by a previous call to Insert_NURBS_Curve() . | |
cp_offset | - Index of the control point and/or weight in the original NURBS curve definition at which to begin editing (indices start at 0). | |
knot_offset | - Index of the knot in the original NURBS curve definition at which to begin editing. | |
cp_count | - The number of control points and/or weights to replace. | |
knot_count | - The number of knots to replace. | |
control_points | - Vector of x-y-z triplets. (A simple N x 3 array may also be used. Passed by reference always. Can be NULL if not interested) | |
weights | - Control point weights. Passed by reference always. Can be NULL if not interested. | |
knots | - Knot sequence. Passed by reference always. Can be NULL if not interested. |
Edit_NURBS_Curve() replaces entries in the originally specified control_points, weights and/or knots (see Insert_NURBS_Curve()), starting at cp_offset for the control points and weights, and knot_offset for the knots. To retain the curve's original values, simply pass NULL for that parameter.
cp_offset + cp_count must be less than the number of control points in the curve. knot_offset + knot_count must be less than the number of knots points in the curve (control points + order).
The system ignores the control_points and weights parameter if cp_count is equal to zero, and ignores the knots parameter if knot_count is equal to zero.
void DEdit_NURBS_Curve | ( | HC_KEY | key, | |
int | cp_offset, | |||
int | knot_offset, | |||
int | cp_count, | |||
int | knot_count, | |||
const HCD_POINT * | control_points, | |||
const double * | weights, | |||
const double * | knots | |||
) |
Similar to Edit_NURBS_Curve() but accepts and/or returns double-precision values. This command can only be used when the application source includes the HOOPS double-precision header, hcd.h.
key | - The numeric identifier returned by a previous call to Insert_NURBS_Curve() . | |
cp_offset | - Index of the control point and/or weight in the original NURBS curve definition at which to begin editing (indices start at 0). | |
knot_offset | - Index of the knot in the original NURBS curve definition at which to begin editing. | |
cp_count | - The number of control points and/or weights to replace. | |
knot_count | - The number of knots to replace. | |
control_points | - Vector of x-y-z triplets. (A simple N x 3 array may also be used. Passed by reference always. Can be NULL if not interested) | |
weights | - Control point weights. Passed by reference always. Can be NULL if not interested. | |
knots | - Knot sequence. Passed by reference always. Can be NULL if not interested. |