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Diffstat (limited to 'src/glu/sgi/libnurbs/nurbtess/sampledLine.cc')
-rw-r--r-- | src/glu/sgi/libnurbs/nurbtess/sampledLine.cc | 182 |
1 files changed, 182 insertions, 0 deletions
diff --git a/src/glu/sgi/libnurbs/nurbtess/sampledLine.cc b/src/glu/sgi/libnurbs/nurbtess/sampledLine.cc new file mode 100644 index 00000000000..66e1a7f77c4 --- /dev/null +++ b/src/glu/sgi/libnurbs/nurbtess/sampledLine.cc @@ -0,0 +1,182 @@ +/* +** License Applicability. Except to the extent portions of this file are +** made subject to an alternative license as permitted in the SGI Free +** Software License B, Version 1.1 (the "License"), the contents of this +** file are subject only to the provisions of the License. You may not use +** this file except in compliance with the License. You may obtain a copy +** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600 +** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at: +** +** http://oss.sgi.com/projects/FreeB +** +** Note that, as provided in the License, the Software is distributed on an +** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS +** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND +** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A +** PARTICULAR PURPOSE, AND NON-INFRINGEMENT. +** +** Original Code. The Original Code is: OpenGL Sample Implementation, +** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics, +** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc. +** Copyright in any portions created by third parties is as indicated +** elsewhere herein. All Rights Reserved. +** +** Additional Notice Provisions: The application programming interfaces +** established by SGI in conjunction with the Original Code are The +** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released +** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version +** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X +** Window System(R) (Version 1.3), released October 19, 1998. This software +** was created using the OpenGL(R) version 1.2.1 Sample Implementation +** published by SGI, but has not been independently verified as being +** compliant with the OpenGL(R) version 1.2.1 Specification. +** +** $Date: 2001/03/17 00:25:41 $ $Revision: 1.1 $ +*/ +/* +** $Header: /home/krh/git/sync/mesa-cvs-repo/Mesa/src/glu/sgi/libnurbs/nurbtess/sampledLine.cc,v 1.1 2001/03/17 00:25:41 brianp Exp $ +*/ + +#include <stdlib.h> +#include <stdio.h> +#include <math.h> //for fabs() +#include "glimports.h" +#include "zlassert.h" +#include "sampledLine.h" + +void sampledLine::setPoint(Int i, Real p[2]) +{ + points[i][0]=p[0]; + points[i][1]=p[1]; +} + + +/*insert this single line in front of the oldList*/ +sampledLine* sampledLine::insert(sampledLine *oldList) +{ + next = oldList; + return this; +} + +void sampledLine::deleteList() +{ + sampledLine *temp, *tempNext; + for(temp = this; temp != NULL; temp = tempNext) + { + tempNext = temp->next; + delete temp; + } +} + + +/*space of points[][2] is allocated*/ +sampledLine::sampledLine(Int n_points) +{ + npoints = n_points; + points = (Real2*) malloc(sizeof(Real2) * n_points); + assert(points); + next = NULL; +} + +/*space of points[][2] is allocated and + *points are copied + */ +sampledLine::sampledLine(Int n_points, Real2 pts[]) +{ + int i; + npoints = n_points; + points = (Real2*) malloc(sizeof(Real2) * n_points); + assert(points); + for(i=0; i<npoints; i++) { + points[i][0] = pts[i][0]; + points[i][1] = pts[i][1]; + } + next = NULL; +} + +sampledLine::sampledLine(Real pt1[2], Real pt2[2]) +{ + int i; + npoints = 2; + points = (Real2*) malloc(sizeof(Real2) * 2); + assert(points); + points[0][0] = pt1[0]; + points[0][1] = pt1[1]; + points[1][0] = pt2[0]; + points[1][1] = pt2[1]; + next = NULL; +} + +//needs tp call init to setup +sampledLine::sampledLine() +{ +} + +//warning: ONLY pointer is copies!!! +void sampledLine::init(Int n_points, Real2 *pts) +{ + npoints = n_points; + points = pts; +} + +/*points[] is dealocated + */ +sampledLine::~sampledLine() +{ + free(points); +} + +void sampledLine::print() +{ + int i; + printf("npoints=%i\n", npoints); + + for(i=0; i<npoints; i++){ + printf("(%f,%f)\n", points[i][0], points[i][1]); + } + +} + +void sampledLine::tessellate(Real u_reso, Real v_reso) +{ + int i; + + Int nu, nv, n; + nu = 1+(Int) (fabs((points[npoints-1][0] - points[0][0])) * u_reso); + nv = 1+(Int) (fabs((points[npoints-1][1] - points[0][1])) * v_reso); + + if(nu > nv) n = nu; + else + n = nv; + if(n<1) + n = 1; + //du dv could be negative + Real du = (points[npoints-1][0] - points[0][0])/n; + Real dv = (points[npoints-1][1] - points[0][1])/n; + Real2 *temp = (Real2*) malloc(sizeof(Real2) * (n+1)); + assert(temp); + + Real u,v; + for(i=0, u=points[0][0], v=points[0][1]; i<n; i++, u+=du, v+=dv) + { + temp[i][0] = u; + temp[i][1] = v; + } + temp[n][0] = points[npoints-1][0]; + temp[n][1] = points[npoints-1][1]; + + free(points); + + npoints = n+1; + points = temp; + +} + +void sampledLine::tessellateAll(Real u_reso, Real v_reso) +{ + sampledLine* temp; + for(temp = this; temp != NULL; temp = temp->next) + { + temp->tessellate(u_reso, v_reso); + } +} |