Added MesaLib-7.6

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);
+    }
+}