174 lines
4.5 KiB
C++
174 lines
4.5 KiB
C++
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/**************************************************************************
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* *
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* Copyright (C) 1991, Silicon Graphics, Inc. *
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* *
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* These coded instructions, statements, and computer programs contain *
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* unpublished proprietary information of Silicon Graphics, Inc., and *
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* are protected by Federal copyright law. They may not be disclosed *
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* to third parties or copied or duplicated in any form, in whole or *
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* in part, without the prior written consent of Silicon Graphics, Inc. *
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* *
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**************************************************************************/
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/*
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* glcurveval.c++ - curve evaluator
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*
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* $Revision: 1.1 $
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*/
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/* Polynomial Evaluator Interface */
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#include <glos.h>
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#include <GL/gl.h>
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#include "glimport.h"
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#include "glrender.h"
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#include "glcurvev.h"
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#include "nurbscon.h"
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OpenGLCurveEvaluator::OpenGLCurveEvaluator(void)
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{
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}
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OpenGLCurveEvaluator::~OpenGLCurveEvaluator(void)
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{
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}
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/* added nonsense to avoid the warning messages at compile time */
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void
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OpenGLCurveEvaluator::addMap(CurveMap *m)
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{
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m = m;
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}
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void
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OpenGLCurveEvaluator::range1f(long type, REAL *from, REAL *to)
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{
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type = type;
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from = from;
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to = to;
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}
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void
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OpenGLCurveEvaluator::domain1f(REAL ulo, REAL uhi)
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{
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ulo = ulo;
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uhi = uhi;
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}
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void
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OpenGLCurveEvaluator::bgnline(void)
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{
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glBegin((GLenum) GL_LINE_STRIP);
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}
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void
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OpenGLCurveEvaluator::endline(void)
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{
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glEnd();
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}
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/*---------------------------------------------------------------------------
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* disable - turn off a curve map
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*---------------------------------------------------------------------------
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*/
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void
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OpenGLCurveEvaluator::disable(long type)
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{
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glDisable((GLenum) type);
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}
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/*---------------------------------------------------------------------------
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* enable - turn on a curve map
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*---------------------------------------------------------------------------
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*/
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void
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OpenGLCurveEvaluator::enable(long type)
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{
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glEnable((GLenum) type);
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}
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/*-------------------------------------------------------------------------
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* mapgrid1f - define a lattice of points with origin and offset
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*-------------------------------------------------------------------------
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*/
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void
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OpenGLCurveEvaluator::mapgrid1f(long nu, REAL u0, REAL u1)
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{
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glMapGrid1f((GLint) nu, (GLfloat) u0, (GLfloat) u1);
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}
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/*-------------------------------------------------------------------------
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* bgnmap1 - preamble to curve definition and evaluations
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*-------------------------------------------------------------------------
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*/
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void
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OpenGLCurveEvaluator::bgnmap1f(long)
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{
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glPushAttrib((GLbitfield) GL_EVAL_BIT);
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}
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/*-------------------------------------------------------------------------
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* endmap1 - postamble to a curve map
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*-------------------------------------------------------------------------
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*/
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void
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OpenGLCurveEvaluator::endmap1f(void)
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{
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glPopAttrib();
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}
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/*-------------------------------------------------------------------------
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* map1f - pass a desription of a curve map
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*-------------------------------------------------------------------------
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*/
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void
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OpenGLCurveEvaluator::map1f(
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long type, /* map type */
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REAL ulo, /* lower parametric bound */
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REAL uhi, /* upper parametric bound */
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long stride, /* distance to next point in REALS */
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long order, /* parametric order */
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REAL *pts /* control points */
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)
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{
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glMap1f((GLenum) type, (GLfloat) ulo, (GLfloat) uhi, (GLint) stride,
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(GLint) order, (const GLfloat *) pts);
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}
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/*-------------------------------------------------------------------------
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* mapmesh1f - evaluate a mesh of points on lattice
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*-------------------------------------------------------------------------
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*/
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void OpenGLCurveEvaluator::mapmesh1f(long style, long from, long to)
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{
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switch(style) {
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default:
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case N_MESHFILL:
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case N_MESHLINE:
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glEvalMesh1((GLenum) GL_LINE, (GLint) from, (GLint) to);
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break;
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case N_MESHPOINT:
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glEvalMesh1((GLenum) GL_POINT, (GLint) from, (GLint) to);
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break;
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}
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}
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/*-------------------------------------------------------------------------
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* evalpoint1i - evaluate a point on a curve
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*-------------------------------------------------------------------------
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*/
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void OpenGLCurveEvaluator::evalpoint1i(long i)
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{
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glEvalPoint1((GLint) i);
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}
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/*-------------------------------------------------------------------------
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* evalcoord1f - evaluate a point on a curve
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*-------------------------------------------------------------------------
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*/
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void OpenGLCurveEvaluator::evalcoord1f(long, REAL u)
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{
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glEvalCoord1f((GLfloat) u);
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}
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