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Diffstat (limited to 'nx-X11/extras/Mesa_6.4.1/src/glu/sgi/libnurbs/interface/bezierPatch.h')
-rw-r--r-- | nx-X11/extras/Mesa_6.4.1/src/glu/sgi/libnurbs/interface/bezierPatch.h | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/nx-X11/extras/Mesa_6.4.1/src/glu/sgi/libnurbs/interface/bezierPatch.h b/nx-X11/extras/Mesa_6.4.1/src/glu/sgi/libnurbs/interface/bezierPatch.h new file mode 100644 index 000000000..31c97ba08 --- /dev/null +++ b/nx-X11/extras/Mesa_6.4.1/src/glu/sgi/libnurbs/interface/bezierPatch.h @@ -0,0 +1,111 @@ +/* +** 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 00:25:40 $ $Revision: 1.1 $ +*/ +/* +** $Header: /home/krh/git/sync/mesa-cvs-repo/Mesa/src/glu/sgi/libnurbs/interface/bezierPatch.h,v 1.1 2001/03/17 00:25:40 brianp Exp $ +*/ + +#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 |