Package toxi.geom.nurbs

Interface NurbsSurface

All Known Implementing Classes:

BasicNurbsSurface

public interface NurbsSurface

Interface for Nurbs Surfaces.

Version:

1.2

Author:

sg

Method Summary

Modifier and Type	Method	Description
ControlNet	getControlNet()	Get the Contol points of the NurbsSurface
int	getUDegree()	Get the degree in u direction
float[]	getUKnots()	Get the knot values in u direction
KnotVector	getUKnotVector()
int	getVDegree()	Get the degree in v direction
float[]	getVKnots()	Get the knot values in v direction
KnotVector	getVKnotVector()
Vec3D	pointOnSurface(double u, double v)
Vec3D	pointOnSurface(float u, float v)	Calculate point on surface for the given u and v values
Vec3D	pointOnSurface(float u, float v, Vec3D out)	Calculate point on surface for the given u and v values
Vec4D[][][][]	surfaceDerivCpts(int d, int r1, int r2, int s1, int s2)	Computes control points of dth derivative Piegel, L.

Method Details

getControlNet

ControlNet getControlNet()

Get the Contol points of the NurbsSurface

Returns:

ControlNet of the Nurbs

getUDegree

int getUDegree()

Get the degree in u direction

Returns:

degree in u direction

getUKnots

float[] getUKnots()

Get the knot values in u direction

Returns:

knot values in u direction

getUKnotVector

KnotVector getUKnotVector()

getVDegree

int getVDegree()

Get the degree in v direction

Returns:

degree in v direction

getVKnots

float[] getVKnots()

Get the knot values in v direction

Returns:

knot values in v direction

getVKnotVector

KnotVector getVKnotVector()

pointOnSurface

Vec3D pointOnSurface(double u,
 double v)

pointOnSurface

Vec3D pointOnSurface(float u,
 float v)

Calculate point on surface for the given u and v values

Parameters:

u - u value to caculate point from

v - v value to caculate point from

Returns:

calculated point

pointOnSurface

Vec3D pointOnSurface(float u,
 float v,
 Vec3D out)

Calculate point on surface for the given u and v values

Parameters:

u - u value to caculate point from

v - v value to caculate point from

out - point to place result in.

surfaceDerivCpts

Vec4D[][][][] surfaceDerivCpts(int d,
 int r1,
 int r2,
 int s1,
 int s2)

Computes control points of dth derivative
Piegel, L. The Nurbs Book, Algorithm A3.7 -> Page 114

Parameters:

d - - dth derivative (0<=k+l<=d)

r1 - - from control point (u direction; 0 for all control points)

r2 - - to control point (u direction; n for all control points)

s1 - - from control point (v direction; 0 for all control points)

s2 - - to control point (v direction; n for all control points)

Returns:

ControlPoint4f[k][l][i][j] i,jth control point, differentiated k times
with respect to u and l times with respect to v