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111 lines
3.8 KiB
C
111 lines
3.8 KiB
C
/*
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** License Applicability. Except to the extent portions of this file are
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** made subject to an alternative license as permitted in the SGI Free
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** Software License B, Version 1.1 (the "License"), the contents of this
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** file are subject only to the provisions of the License. You may not use
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** this file except in compliance with the License. You may obtain a copy
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** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
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** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
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**
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** http://oss.sgi.com/projects/FreeB
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**
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** Note that, as provided in the License, the Software is distributed on an
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** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
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** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
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** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
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** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
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**
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** Original Code. The Original Code is: OpenGL Sample Implementation,
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** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
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** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
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** Copyright in any portions created by third parties is as indicated
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** elsewhere herein. All Rights Reserved.
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**
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** Additional Notice Provisions: The application programming interfaces
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** established by SGI in conjunction with the Original Code are The
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** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
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** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
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** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
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** Window System(R) (Version 1.3), released October 19, 1998. This software
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** was created using the OpenGL(R) version 1.2.1 Sample Implementation
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** published by SGI, but has not been independently verified as being
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** compliant with the OpenGL(R) version 1.2.1 Specification.
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**
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** $Date$ $Revision: 1.1 $
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*/
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/*
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** $Header: /cygdrive/c/RCVS/CVS/ReactOS/reactos/lib/glu32/libnurbs/interface/bezierPatch.h,v 1.1 2004/02/02 16:39:08 navaraf Exp $
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*/
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#ifndef _BEZIERPATCH_H
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#define _BEZIERPATCH_H
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typedef struct bezierPatch{
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float umin, vmin, umax, vmax;
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int uorder; /*order= degree + 1*/
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int vorder;
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/*
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*the control points are stored in a one dimensional array.
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*the surface is defined as:
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* s(u,v) = sum_{i,j} P(i,j) * B_i(u) * B_j(v).
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*where P(i,j) are the control points, B_i(.) are Bezier
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*basis functions.
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*Each control point can have dimension 3 or 4: (x,y,z,w).
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*The components of P(i,j) are stored in a one dimensional
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*array:
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* ctlpoints[]
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*in the order of:
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* P[0,0], P[0,1], ..., P[0,vorder-1],
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* P[1,0], P[1,1], ..., P[1,vorder-1],
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* ...
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* P[uorder-1,0], P[uorder-1,1], ..., P[uorder-1,vorder-1].
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*/
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int dimension;
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float* ctlpoints;
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/*
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*in case we have to manage multiple bezierPatches.
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*/
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struct bezierPatch *next;
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} bezierPatch;
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#ifdef __cplusplus
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extern "C" {
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#endif
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bezierPatch* bezierPatchMake(float umin, float vmin, float umax, float vmax, int urder, int vorder, int dimension);
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bezierPatch* bezierPatchMake2(float umin, float vmin, float umax, float vmax, int urder, int vorder, int dimension, int ustride, int vstride, float *ctlpoints);
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bezierPatch* bezierPatchInsert(bezierPatch *list, bezierPatch *b);
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void bezierPatchDelete(bezierPatch *b);
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void bezierPatchDeleteList(bezierPatch *b);
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void bezierPatchPrint(bezierPatch *b);
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void bezierPatchPrintList(bezierPatch *list);
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void bezierPatchEval(bezierPatch *b, float u, float v, float ret[]);
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void bezierPatchEvalNormal(bezierPatch *b, float u, float v, float retNormal[]);
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void bezierPatchEval(bezierPatch *b, float u, float v, float ret[]);
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void bezierPatchEvalNormal(bezierPatch *b, float u, float v, float ret[]);
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void bezierPatchDraw(bezierPatch *bpatch, int u_reso, int v_reso);
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void bezierPatchListDraw(bezierPatch *list, int u_reso, int v_reso);
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#ifdef __cplusplus
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}
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#endif
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#endif
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