Unix/Linux Go Back    


CentOS 7.0 - man page for glunurbssurface (centos section 3G)

Linux & Unix Commands - Search Man Pages
Man Page or Keyword Search:   man
Select Man Page Set:       apropos Keyword Search (sections above)


GLUNURBSSURFACE(3G)			  OpenGL Manual 		      GLUNURBSSURFACE(3G)

NAME
       gluNurbsSurface - define the shape of a NURBS surface

C SPECIFICATION
       void gluNurbsSurface(GLUnurbs* nurb, GLint sKnotCount, GLfloat* sKnots, GLint tKnotCount,
			    GLfloat* tKnots, GLint sStride, GLint tStride, GLfloat* control,
			    GLint sOrder, GLint tOrder, GLenum type);

PARAMETERS
       nurb
	   Specifies the NURBS object (created with gluNewNurbsRenderer()).

       sKnotCount
	   Specifies the number of knots in the parametric u direction.

       sKnots
	   Specifies an array of sKnotCount nondecreasing knot values in the parametric u
	   direction.

       tKnotCount
	   Specifies the number of knots in the parametric v direction.

       tKnots
	   Specifies an array of tKnotCount nondecreasing knot values in the parametric v
	   direction.

       sStride
	   Specifies the offset (as a number of single-precision floating-point values) between
	   successive control points in the parametric u direction in control.

       tStride
	   Specifies the offset (in single-precision floating-point values) between successive
	   control points in the parametric v direction in control.

       control
	   Specifies an array containing control points for the NURBS surface. The offsets
	   between successive control points in the parametric u and v directions are given by
	   sStride and tStride.

       sOrder
	   Specifies the order of the NURBS surface in the parametric u direction. The order is
	   one more than the degree, hence a surface that is cubic in u has a u order of 4.

       tOrder
	   Specifies the order of the NURBS surface in the parametric v direction. The order is
	   one more than the degree, hence a surface that is cubic in v has a v order of 4.

       type
	   Specifies type of the surface.  type can be any of the valid two-dimensional evaluator
	   types (such as GLU_MAP2_VERTEX_3 or GLU_MAP2_COLOR_4).

DESCRIPTION
       Use gluNurbsSurface within a NURBS (Non-Uniform Rational B-Spline) surface definition to
       describe the shape of a NURBS surface (before any trimming). To mark the beginning of a
       NURBS surface definition, use the gluBeginSurface() command. To mark the end of a NURBS
       surface definition, use the gluEndSurface() command. Call gluNurbsSurface within a NURBS
       surface definition only.

       Positional, texture, and color coordinates are associated with a surface by presenting
       each as a separate gluNurbsSurface between a gluBeginSurface()/gluEndSurface() pair. No
       more than one call to gluNurbsSurface for each of color, position, and texture data can be
       made within a single gluBeginSurface()/gluEndSurface() pair. Exactly one call must be made
       to describe the position of the surface (a type of GLU_MAP2_VERTEX_3 or
       GLU_MAP2_VERTEX_4).

       A NURBS surface can be trimmed by using the commands gluNurbsCurve() and gluPwlCurve()
       between calls to gluBeginTrim() and gluEndTrim().

       Note that a gluNurbsSurface with sKnotCount knots in the u direction and tKnotCount knots
       in the v direction with orders sOrder and tOrder must have (sKnotCount - sOrder) times
       (tKnotCount - tOrder) control points.

EXAMPLE
       The following commands render a textured NURBS surface with normals; the texture
       coordinates and normals are also NURBS surfaces:

	   gluBeginSurface(nobj);
	      gluNurbsSurface(nobj, ..., GL_MAP2_TEXTURE_COORD_2);
	      gluNurbsSurface(nobj, ..., GL_MAP2_NORMAL);
	      gluNurbsSurface(nobj, ..., GL_MAP2_VERTEX_4);
	   gluEndSurface(nobj);

SEE ALSO
       gluBeginSurface(), gluBeginTrim(), gluNewNurbsRenderer(), gluNurbsCurve(), gluPwlCurve()

COPYRIGHT
       Copyright (C) 1991-2006 Silicon Graphics, Inc. This document is licensed under the SGI
       Free Software B License. For details, see http://oss.sgi.com/projects/FreeB/.

AUTHORS
       opengl.org

opengl.org				    06/10/2014			      GLUNURBSSURFACE(3G)
Unix & Linux Commands & Man Pages : ©2000 - 2018 Unix and Linux Forums


All times are GMT -4. The time now is 07:57 AM.