| /* |
| ** 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: 2012/03/29 17:22:17 $ $Revision: 1.1.1.1 $ |
| */ |
| /* |
| ** $Header: /cvs/bao-parsec/pkgs/libs/mesa/src/src/glu/sgi/libnurbs/nurbtess/sampledLine.cc,v 1.1.1.1 2012/03/29 17:22:17 uid42307 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]) |
| { |
| 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); |
| } |
| } |