aboutsummaryrefslogtreecommitdiff
path: root/mesalib/src/glu/sgi/libnurbs/nurbtess/sampledLine.cc
diff options
context:
space:
mode:
authormarha <marha@users.sourceforge.net>2009-10-08 13:15:52 +0000
committermarha <marha@users.sourceforge.net>2009-10-08 13:15:52 +0000
commita0c4815433ccd57322f4f7703ca35e9ccfa59250 (patch)
treef5213802ec12adb86ec3136001c1c29fe5343700 /mesalib/src/glu/sgi/libnurbs/nurbtess/sampledLine.cc
parentc73dc01b6de45612b24dc2dd34fba24d81ebf46c (diff)
downloadvcxsrv-a0c4815433ccd57322f4f7703ca35e9ccfa59250.tar.gz
vcxsrv-a0c4815433ccd57322f4f7703ca35e9ccfa59250.tar.bz2
vcxsrv-a0c4815433ccd57322f4f7703ca35e9ccfa59250.zip
Added MesaLib-7.6
Diffstat (limited to 'mesalib/src/glu/sgi/libnurbs/nurbtess/sampledLine.cc')
-rw-r--r--mesalib/src/glu/sgi/libnurbs/nurbtess/sampledLine.cc179
1 files changed, 179 insertions, 0 deletions
diff --git a/mesalib/src/glu/sgi/libnurbs/nurbtess/sampledLine.cc b/mesalib/src/glu/sgi/libnurbs/nurbtess/sampledLine.cc
new file mode 100644
index 000000000..6253a7c09
--- /dev/null
+++ b/mesalib/src/glu/sgi/libnurbs/nurbtess/sampledLine.cc
@@ -0,0 +1,179 @@
+/*
+** 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.
+**
+*/
+/*
+*/
+
+#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);
+ }
+}