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c424146e2c
svn path=/branches/cmake-bringup/; revision=48236
182 lines
4.6 KiB
C++
182 lines
4.6 KiB
C++
/*
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** License Applicability. Except to the extent portions of this file are
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** made subject to an alternative license as permitted in the SGI Free
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** Software License B, Version 1.1 (the "License"), the contents of this
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** file are subject only to the provisions of the License. You may not use
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** this file except in compliance with the License. You may obtain a copy
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** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
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** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
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**
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** http://oss.sgi.com/projects/FreeB
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**
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** Note that, as provided in the License, the Software is distributed on an
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** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
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** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
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** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
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** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
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**
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** Original Code. The Original Code is: OpenGL Sample Implementation,
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** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
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** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
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** Copyright in any portions created by third parties is as indicated
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** elsewhere herein. All Rights Reserved.
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**
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** Additional Notice Provisions: The application programming interfaces
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** established by SGI in conjunction with the Original Code are The
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** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
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** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
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** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
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** Window System(R) (Version 1.3), released October 19, 1998. This software
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** was created using the OpenGL(R) version 1.2.1 Sample Implementation
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** published by SGI, but has not been independently verified as being
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** compliant with the OpenGL(R) version 1.2.1 Specification.
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**
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** $Date$ $Revision: 1.1 $
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*/
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/*
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** $Header: /cygdrive/c/RCVS/CVS/ReactOS/reactos/lib/glu32/libnurbs/nurbtess/sampledLine.cc,v 1.1 2004/02/02 16:39:15 navaraf Exp $
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <math.h> //for fabs()
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#include "glimports.h"
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#include "zlassert.h"
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#include "sampledLine.h"
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void sampledLine::setPoint(Int i, Real p[2])
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{
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points[i][0]=p[0];
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points[i][1]=p[1];
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}
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/*insert this single line in front of the oldList*/
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sampledLine* sampledLine::insert(sampledLine *oldList)
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{
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next = oldList;
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return this;
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}
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void sampledLine::deleteList()
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{
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sampledLine *temp, *tempNext;
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for(temp = this; temp != NULL; temp = tempNext)
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{
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tempNext = temp->next;
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delete temp;
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}
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}
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/*space of points[][2] is allocated*/
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sampledLine::sampledLine(Int n_points)
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{
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npoints = n_points;
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points = (Real2*) malloc(sizeof(Real2) * n_points);
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assert(points);
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next = NULL;
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}
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/*space of points[][2] is allocated and
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*points are copied
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*/
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sampledLine::sampledLine(Int n_points, Real2 pts[])
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{
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int i;
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npoints = n_points;
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points = (Real2*) malloc(sizeof(Real2) * n_points);
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assert(points);
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for(i=0; i<npoints; i++) {
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points[i][0] = pts[i][0];
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points[i][1] = pts[i][1];
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}
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next = NULL;
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}
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sampledLine::sampledLine(Real pt1[2], Real pt2[2])
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{
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npoints = 2;
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points = (Real2*) malloc(sizeof(Real2) * 2);
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assert(points);
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points[0][0] = pt1[0];
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points[0][1] = pt1[1];
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points[1][0] = pt2[0];
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points[1][1] = pt2[1];
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next = NULL;
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}
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//needs tp call init to setup
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sampledLine::sampledLine()
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{
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}
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//warning: ONLY pointer is copies!!!
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void sampledLine::init(Int n_points, Real2 *pts)
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{
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npoints = n_points;
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points = pts;
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}
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/*points[] is dealocated
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*/
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sampledLine::~sampledLine()
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{
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free(points);
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}
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void sampledLine::print()
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{
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int i;
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printf("npoints=%i\n", npoints);
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for(i=0; i<npoints; i++){
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printf("(%f,%f)\n", points[i][0], points[i][1]);
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}
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}
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void sampledLine::tessellate(Real u_reso, Real v_reso)
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{
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int i;
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Int nu, nv, n;
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nu = 1+(Int) (fabs((points[npoints-1][0] - points[0][0])) * u_reso);
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nv = 1+(Int) (fabs((points[npoints-1][1] - points[0][1])) * v_reso);
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if(nu > nv) n = nu;
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else
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n = nv;
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if(n<1)
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n = 1;
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//du dv could be negative
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Real du = (points[npoints-1][0] - points[0][0])/n;
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Real dv = (points[npoints-1][1] - points[0][1])/n;
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Real2 *temp = (Real2*) malloc(sizeof(Real2) * (n+1));
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assert(temp);
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Real u,v;
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for(i=0, u=points[0][0], v=points[0][1]; i<n; i++, u+=du, v+=dv)
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{
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temp[i][0] = u;
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temp[i][1] = v;
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}
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temp[n][0] = points[npoints-1][0];
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temp[n][1] = points[npoints-1][1];
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free(points);
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npoints = n+1;
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points = temp;
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}
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void sampledLine::tessellateAll(Real u_reso, Real v_reso)
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{
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sampledLine* temp;
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for(temp = this; temp != NULL; temp = temp->next)
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{
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temp->tessellate(u_reso, v_reso);
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}
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}
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