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<HTML><BODY><PRE> <STRONG>NAME</STRONG> <STRONG>fgluPwlCurve</STRONG> - describe a piecewise linear NURBS trimming curve <STRONG>FORTRAN</STRONG> <STRONG>SPECIFICATION</STRONG> SUBROUTINE <STRONG>fgluPwlCurve</STRONG>( CHARACTER*8 <EM>nurb</EM>, INTEGER*4 <EM>count</EM>, CHARACTER*8 <EM>data</EM>, INTEGER*4 <EM>stride</EM>, INTEGER*4 <EM>type</EM> ) <STRONG>PARAMETERS</STRONG> <EM>nurb</EM> Specifies the NURBS object (created with <STRONG>fgluNewNurbsRenderer</STRONG>). <EM>count</EM> Specifies the number of points on the curve. <EM>data</EM> Specifies an array containing the curve points. <EM>stride</EM> Specifies the offset (a number of single-precision floating-point values) between points on the curve. <EM>type</EM> Specifies the type of curve. Must be either <STRONG>GLU_MAP1_TRIM_2</STRONG> or <STRONG>GLU_MAP1_TRIM_3</STRONG>. <STRONG>DESCRIPTION</STRONG> <STRONG>fgluPwlCurve</STRONG> describes a piecewise linear trimming curve for a NURBS surface. A piecewise linear curve consists of a list of coordinates of points in the parameter space for the NURBS surface to be trimmed. These points are connected with line segments to form a curve. If the curve is an approximation to a curve that is not piecewise linear, the points should be close enough in parameter space that the resulting path appears curved at the resolution used in the application. If <EM>type</EM> is <STRONG>GLU_MAP1_TRIM_2</STRONG>, then it describes a curve in two-dimensional (<EM>u</EM> and <EM>v</EM>) parameter space. If it is <STRONG>GLU_MAP1_TRIM_3</STRONG>, then it describes a curve in two- dimensional homogeneous (<EM>u</EM>, <EM>v</EM>, and <EM>w</EM>) parameter space. See the <STRONG>fgluBeginTrim</STRONG> reference page for more information about trimming curves. <STRONG>NOTES</STRONG> To describe a trim curve that closely follows the contours of a NURBS surface, call <STRONG>fgluNurbsCurve</STRONG>. <STRONG>SEE</STRONG> <STRONG>ALSO</STRONG> <STRONG>fgluBeginCurve</STRONG>, <STRONG>fgluBeginTrim</STRONG>, <STRONG>fgluNewNurbsRenderer</STRONG>, <STRONG>fgluNurbsCurve</STRONG></PRE></BODY></HTML>⌨️ 快捷键说明
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