1 files changed, 104 insertions, 0 deletions
diff --git a/mesalib/src/glu/sgi/libnurbs/interface/bezierPatch.h b/mesalib/src/glu/sgi/libnurbs/interface/bezierPatch.h
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index 000000000..981183afa
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+++ b/mesalib/src/glu/sgi/libnurbs/interface/bezierPatch.h
@@ -0,0 +1,104 @@
+/*
+ * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
+ * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice including the dates of first publication and
+ * either this permission notice or a reference to
+ * http://oss.sgi.com/projects/FreeB/
+ * shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
+ * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * Except as contained in this notice, the name of Silicon Graphics, Inc.
+ * shall not be used in advertising or otherwise to promote the sale, use or
+ * other dealings in this Software without prior written authorization from
+ * Silicon Graphics, Inc.
+ */
+/*
+*/
+
+#ifndef _BEZIERPATCH_H
+#define _BEZIERPATCH_H
+
+typedef struct bezierPatch{
+  float umin, vmin, umax, vmax;
+  int uorder; /*order= degree + 1*/
+  int vorder; 
+
+  /*
+   *the control points are stored in a one dimensional  array.
+   *the surface is defined as:
+   *      s(u,v) = sum_{i,j} P(i,j) * B_i(u) * B_j(v).
+   *where P(i,j) are the control points, B_i(.) are Bezier
+   *basis functions.
+   *Each control point can have dimension 3 or 4: (x,y,z,w).
+   *The components of P(i,j) are stored in a one dimensional 
+   *array: 
+   *       ctlpoints[]
+   *in the order of:
+   * P[0,0], P[0,1], ..., P[0,vorder-1],
+   * P[1,0], P[1,1], ..., P[1,vorder-1],
+   *  ...             
+   * P[uorder-1,0], P[uorder-1,1], ..., P[uorder-1,vorder-1].
+   */
+  int dimension;
+  float* ctlpoints;
+
+  /*
+   *in case we have to manage multiple bezierPatches.
+   */
+  struct bezierPatch  *next; 
+
+} bezierPatch;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+bezierPatch* bezierPatchMake(float umin, float vmin, float umax, float vmax, int urder, int vorder, int dimension);
+
+bezierPatch* bezierPatchMake2(float umin, float vmin, float umax, float vmax, int urder, int vorder, int dimension, int ustride, int vstride, float *ctlpoints);
+
+
+bezierPatch* bezierPatchInsert(bezierPatch *list, bezierPatch *b);
+
+void bezierPatchDelete(bezierPatch *b);
+
+void bezierPatchDeleteList(bezierPatch *b);
+
+void bezierPatchPrint(bezierPatch *b);
+
+void bezierPatchPrintList(bezierPatch *list);
+
+void bezierPatchEval(bezierPatch *b, float u, float v, float ret[]);
+
+void bezierPatchEvalNormal(bezierPatch *b, float u, float v, float retNormal[]);
+
+void bezierPatchEval(bezierPatch *b, float u, float v, float ret[]);
+
+void bezierPatchEvalNormal(bezierPatch *b, float u, float v, float ret[]);
+
+
+void bezierPatchDraw(bezierPatch *bpatch, int u_reso, int v_reso);
+
+void bezierPatchListDraw(bezierPatch *list, int u_reso, int v_reso);
+
+#ifdef __cplusplus
+}
+#endif
+
+
+#endif