From 77cc447b96a75106354da02437c4e868265d27bb Mon Sep 17 00:00:00 2001
From: Brian Paul <brian.paul@tungstengraphics.com>
Date: Sat, 17 Mar 2001 00:25:40 +0000
Subject: SGI SI GLU library

---
 src/glu/sgi/libnurbs/nurbtess/rectBlock.cc | 198 +++++++++++++++++++++++++++++
 1 file changed, 198 insertions(+)
 create mode 100644 src/glu/sgi/libnurbs/nurbtess/rectBlock.cc

(limited to 'src/glu/sgi/libnurbs/nurbtess/rectBlock.cc')

diff --git a/src/glu/sgi/libnurbs/nurbtess/rectBlock.cc b/src/glu/sgi/libnurbs/nurbtess/rectBlock.cc
new file mode 100644
index 0000000000..932683ccac
--- /dev/null
+++ b/src/glu/sgi/libnurbs/nurbtess/rectBlock.cc
@@ -0,0 +1,198 @@
+/*
+** 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/rectBlock.cc,v 1.1 2001/03/17 00:25:41 brianp Exp $
+*/
+
+#include "gluos.h"
+#include <stdlib.h>
+#include <stdio.h>
+#include "glimports.h"
+#include "zlassert.h"
+#include <GL/gl.h>
+
+#include "rectBlock.h"
+
+rectBlock::rectBlock(gridBoundaryChain* left, gridBoundaryChain* right, Int beginVline, Int endVline)
+{
+  Int i;
+
+
+  upGridLineIndex = left->getVlineIndex(beginVline);
+
+  lowGridLineIndex = left->getVlineIndex(endVline);
+
+  Int n = upGridLineIndex-lowGridLineIndex+1; //number of grid lines
+  leftIndices = (Int*) malloc(sizeof(Int) * n);
+  assert(leftIndices);
+  rightIndices = (Int*) malloc(sizeof(Int) * n);
+  assert(rightIndices);
+  for(i=0; i<n; i++)
+    {
+
+      leftIndices[i] = left->getInnerIndex(i+beginVline);
+      rightIndices[i] = right->getInnerIndex(i+beginVline);
+    }
+}
+
+
+rectBlock::~rectBlock()
+{
+  free(leftIndices);
+  free(rightIndices);
+}
+
+void rectBlock::print()
+{
+  Int i;
+  printf("block:\n");
+  for(i=upGridLineIndex; i >= lowGridLineIndex; i--)
+    {
+      printf("gridline %i, (%i,%i)\n", i, leftIndices[upGridLineIndex-i], rightIndices[upGridLineIndex-i]);
+    }
+}
+
+
+
+void rectBlock::draw(Real* u_values, Real* v_values)
+{
+  Int i,j,k;
+  //upgrid line to bot grid line
+#ifdef DEBUG
+printf("upGridLineIndex=%i, lowGridLineIndex=%i\n", upGridLineIndex, lowGridLineIndex);
+#endif
+  for(k=0, i=upGridLineIndex; i > lowGridLineIndex; i--, k++)
+    {
+      glBegin(GL_QUAD_STRIP);
+
+      for(j=leftIndices[k+1]; j<= rightIndices[k+1]; j++)
+	{
+	  glVertex2f(u_values[j], v_values[i]);
+	  glVertex2f(u_values[j], v_values[i-1]);
+	}
+      glEnd();
+    }  
+}
+
+
+Int rectBlock::num_quads()
+{
+  Int ret=0;
+  Int k,i;
+  for(k=0, i=upGridLineIndex; i>lowGridLineIndex; i--, k++)
+    {
+      ret += (rightIndices[k+1]-leftIndices[k+1]);
+    }
+  return ret;
+}
+
+Int rectBlockArray::num_quads()
+{
+  Int ret=0;
+  for(Int i=0; i<n_elements; i++)
+    ret += array[i]->num_quads();
+  return ret;
+}
+
+rectBlockArray::rectBlockArray(Int s)
+{
+  Int i;
+  n_elements = 0;
+  size = s;
+  array = (rectBlock**) malloc(sizeof(rectBlock*) * s);
+  assert(array);
+//initialization
+  for(i=0; i<s; i++)
+    array[i] = NULL;
+}
+
+rectBlockArray::~rectBlockArray()
+{
+  Int i;
+  for(i=0; i<size; i++)
+    {
+      if(array[i] != NULL)
+	delete array[i];
+    }
+  free(array);
+}
+
+//put to the end of the array, check the size
+void rectBlockArray::insert(rectBlock* newBlock)
+{
+  Int i;
+  if(n_elements == size) //full
+    {
+      rectBlock** temp = (rectBlock**) malloc(sizeof(rectBlock) * (2*size+1));
+      assert(temp);
+      //initialization
+      for(i=0; i<2*size+1; i++)
+	temp[i] = NULL;
+      
+      for(i=0; i<n_elements; i++)
+	temp[i] = array[i];
+      
+      free(array);
+      array = temp;
+      size = 2*size +  1;
+    }
+  
+  array[n_elements++] = newBlock;
+}
+
+void rectBlockArray::print()
+{
+  Int i;
+  for(i=0; i<n_elements; i++)
+    array[i]->print();
+}
+
+void rectBlockArray::draw(Real* u_values, Real* v_values)
+{
+  Int i;
+  for(i=0; i<n_elements; i++)
+    array[i]->draw(u_values, v_values);
+}
+
+
+
+
+
+
+
+
+
+
-- 
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