1 files changed, 206 insertions, 0 deletions
diff --git a/mesalib/src/glu/sgi/libnurbs/interface/bezierPatch.cc b/mesalib/src/glu/sgi/libnurbs/interface/bezierPatch.cc
new file mode 100644
index 000000000..dbab3a1a2
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+++ b/mesalib/src/glu/sgi/libnurbs/interface/bezierPatch.cc
@@ -0,0 +1,206 @@
+/*
+** 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 "gluos.h"
+#include <stdlib.h>
+#include <stdio.h>
+#include <assert.h>
+#include <GL/glu.h> /*for drawing bzier patch*/
+#include "bezierPatch.h"
+#include "bezierEval.h"
+
+/*
+ *allocate an instance of bezierPatch. The control points are unknown. But
+ *the space of this array is allocated with size of 
+ *   uorder*vorder*dimension
+ *
+ */
+bezierPatch* bezierPatchMake(float umin, float vmin, float umax, float vmax, int uorder, int vorder, int dimension)
+{
+  bezierPatch* ret = (bezierPatch*) malloc(sizeof(bezierPatch));
+  assert(ret);
+  ret->umin = umin;
+  ret->vmin = vmin;
+  ret->umax = umax;
+  ret->vmax = vmax;
+  ret->uorder = uorder;
+  ret->vorder = vorder;
+  ret->dimension = dimension;
+  ret->ctlpoints = (float*) malloc(sizeof(float) * dimension * uorder * vorder);
+  assert(ret->ctlpoints);
+
+  ret->next = NULL;
+
+  return ret;
+}
+
+bezierPatch* bezierPatchMake2(float umin, float vmin, float umax, float vmax, int uorder, int vorder, int dimension, int ustride, int vstride,  float* ctlpoints)
+{
+  bezierPatch* ret = (bezierPatch*) malloc(sizeof(bezierPatch));
+  assert(ret);
+  ret->umin = umin;
+  ret->vmin = vmin;
+  ret->umax = umax;
+  ret->vmax = vmax;
+  ret->uorder = uorder;
+  ret->vorder = vorder;
+  ret->dimension = dimension;
+  ret->ctlpoints = (float*) malloc(sizeof(float) * dimension * uorder * vorder);
+  assert(ret->ctlpoints);
+
+  /*copy the control points there*/
+  int the_ustride = vorder * dimension;
+  int the_vstride = dimension;
+  for(int i=0; i<uorder; i++)
+    for(int j=0; j<vorder; j++)
+      for(int k=0; k<dimension; k++)
+	ret->ctlpoints[i * the_ustride + j*the_vstride+k] = ctlpoints[i*ustride+j*vstride+k];
+  
+  ret->next = NULL;
+
+  return ret;
+}
+
+/*
+ *deallocate the space as allocated by Make
+ */
+void bezierPatchDelete(bezierPatch *b)
+{
+  free(b->ctlpoints);
+  free(b);
+}
+
+/*delete the whole linked list
+ */
+void bezierPatchDeleteList(bezierPatch *b)
+{
+  bezierPatch *temp;
+  while (b != NULL) {
+    temp = b;
+    b = b->next;
+    bezierPatchDelete(temp);    
+  }
+}
+
+bezierPatch* bezierPatchInsert(bezierPatch *list, bezierPatch *b)
+{
+  b->next = list;
+  return b;
+}
+
+/*print the data stored in this patch*/
+void bezierPatchPrint(bezierPatch *b)
+{
+  printf("bezierPatch:\n");
+  printf("umin,umax=(%f,%f), (vmin, vmax)=(%f,%f)\n", b->umin, b->umax, b->vmin, b->vmax);
+  printf("uorder=%i, vorder=%i\n", b->uorder, b->vorder);
+  printf("idmension = %i\n", b->dimension);
+}
+       
+/*print the whole list*/
+void bezierPatchPrintList(bezierPatch *list)
+{
+  bezierPatch* temp;
+  for(temp=list; temp != NULL; temp = temp->next)
+    bezierPatchPrint(temp);
+}
+
+void bezierPatchEval(bezierPatch *b, float u, float v, float ret[])
+{
+  if(   u >= b->umin && u<= b->umax
+     && v >= b->vmin && v<= b->vmax)
+    {
+
+      bezierSurfEval(b->umin, b->umax, b->uorder, b->vmin, b->vmax, b->vorder, b->dimension, b->ctlpoints, b->dimension * b->vorder, b->dimension, u, v, ret);
+
+     }
+  else if(b->next != NULL)
+    bezierPatchEval(b->next, u,v, ret);
+  else 
+    bezierSurfEval(b->umin, b->umax, b->uorder, b->vmin, b->vmax, b->vorder, b->dimension, b->ctlpoints, b->dimension * b->vorder, b->dimension, u, v, ret);    
+}
+
+/*the returned normal is normlized
+ */
+void bezierPatchEvalNormal(bezierPatch *b, float u, float v, float ret[])
+{
+  bezierSurfEvalNormal(b->umin, b->umax, b->uorder, b->vmin, b->vmax, b->vorder, b->dimension, b->ctlpoints, b->dimension * b->vorder, b->dimension, u, v, ret);  
+
+  if(   u >= b->umin && u<= b->umax
+     && v >= b->vmin && v<= b->vmax)
+    {
+      bezierSurfEvalNormal(b->umin, b->umax, b->uorder, b->vmin, b->vmax, b->vorder, b->dimension, b->ctlpoints, b->dimension * b->vorder, b->dimension, u, v, ret);
+     }
+  else if(b->next != NULL)
+    bezierPatchEvalNormal(b->next, u,v, ret);
+  else 
+    bezierSurfEvalNormal(b->umin, b->umax, b->uorder, b->vmin, b->vmax, b->vorder, b->dimension, b->ctlpoints, b->dimension * b->vorder, b->dimension, u, v, ret);    
+
+}
+
+void bezierPatchDraw(bezierPatch *bpatch, int u_reso, int v_reso)
+{
+  if(bpatch->dimension == 3)
+    glMap2f(GL_MAP2_VERTEX_3, bpatch->umin, bpatch->umax, 3*bpatch->vorder, bpatch->uorder, bpatch->vmin, bpatch->vmax,3, bpatch->vorder, (GLfloat*) bpatch->ctlpoints);
+  else
+    glMap2f(GL_MAP2_VERTEX_4, bpatch->umin, bpatch->umax, 4*bpatch->vorder, bpatch->uorder, bpatch->vmin, bpatch->vmax,3, bpatch->vorder, (GLfloat*) bpatch->ctlpoints);    
+
+  glMapGrid2f(u_reso, bpatch->umin, bpatch->umax, 
+	      v_reso, bpatch->vmin, bpatch->vmax);
+  glEvalMesh2(GL_LINE, 0, u_reso, 0, v_reso);
+}
+
+void bezierPatchListDraw(bezierPatch *list, int u_reso, int v_reso)
+{
+  bezierPatch *temp;
+glEnable(GL_LIGHTING);
+glEnable(GL_LIGHT0);
+glEnable(GL_MAP2_VERTEX_3);
+glEnable(GL_AUTO_NORMAL);
+glEnable(GL_NORMALIZE);
+glColor3f(1,0,0);
+#ifdef DEBUG
+printf("mapmap\n");
+#endif
+
+
+  for(temp = list; temp != NULL; temp = temp->next)
+    bezierPatchDraw(temp, u_reso, v_reso);
+}
+	    
+
+