1 /*
2  * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
3  * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
4  *
5  * Permission is hereby granted, free of charge, to any person obtaining a
6  * copy of this software and associated documentation files (the "Software"),
7  * to deal in the Software without restriction, including without limitation
8  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9  * and/or sell copies of the Software, and to permit persons to whom the
10  * Software is furnished to do so, subject to the following conditions:
11  *
12  * The above copyright notice including the dates of first publication and
13  * either this permission notice or a reference to
14  * http://oss.sgi.com/projects/FreeB/
15  * shall be included in all copies or substantial portions of the Software.
16  *
17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20  * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
21  * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
22  * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
23  * SOFTWARE.
24  *
25  * Except as contained in this notice, the name of Silicon Graphics, Inc.
26  * shall not be used in advertising or otherwise to promote the sale, use or
27  * other dealings in this Software without prior written authorization from
28  * Silicon Graphics, Inc.
29  */
30 /*
31 */
32 
33 #ifndef _BEZIERPATCHMESH_H
34 #define _BEZIERPATCHMESH_H
35 
36 #include <GL/gl.h>
37 #include "bezierPatch.h"
38 
39 typedef struct bezierPatchMesh{
40   bezierPatch *bpatch; /*vertex*/
41   bezierPatch *bpatch_normal;
42   bezierPatch *bpatch_texcoord; /*s,t,r,q*/
43   bezierPatch *bpatch_color; /*RGBA*/
44 
45   float *UVarray; /*all UV components of all vertices of all strips*/
46   int   *length_array; /*[i] is the number of vertices in the ith strip*/
47   GLenum *type_array;  /*[i] is the type of the ith primitive*/
48 
49   /*to support dynamic insertion*/
50   int size_UVarray;
51   int index_UVarray;
52   int size_length_array;
53   int index_length_array;
54 
55   int counter; /*track the current strip size*/
56   GLenum type; /*track the current type: 0: GL_TRIANGLES, 1: GL_TRIANGLE_STRIP*/
57 
58   /*we eventually want to evaluate from (u,v) to (x,y,z) and draw them*/
59   float *vertex_array; /*each vertex contains three components*/
60   float *normal_array; /*each normal contains three components*/
61   float *color_array;
62   float *texcoord_array;
63 
64   /*in case we need a linked list*/
65   struct bezierPatchMesh *next;
66 } bezierPatchMesh;
67 
68 #ifdef __cplusplus
69 extern "C" {
70 #endif
71 
72 
73 
74 bezierPatchMesh *bezierPatchMeshMake(int maptype, float umin, float umax, int ustride, int uorder, float vmin, float vmax, int vstride, int vorder, float *ctlpoints,  int size_UVarray, int size_length_array);
75 
76 /*initilize patches to be null*/
77 bezierPatchMesh *bezierPatchMeshMake2(int size_UVarray, int size_length_array);
78 
79 void bezierPatchMeshPutPatch(bezierPatchMesh *bpm, int maptype, float umin, float umax, int ustride, int uorder, float vmin, float vmax, int vstride, int vorder, float *ctlpoints);
80 
81 void bezierPatchMeshDelete(bezierPatchMesh *bpm);
82 
83 void bezierPatchMeshBeginStrip(bezierPatchMesh *bpm, GLenum type);
84 
85 void bezierPatchMeshEndStrip(bezierPatchMesh *bpm);
86 
87 void bezierPatchMeshInsertUV(bezierPatchMesh *bpm, float u, float v);
88 
89 void bezierPatchMeshPrint(bezierPatchMesh *bpm);
90 
91 bezierPatchMesh* bezierPatchMeshListInsert(bezierPatchMesh* list, bezierPatchMesh* bpm);
92 
93 void bezierPatchMeshListPrint(bezierPatchMesh* list);
94 
95 int bezierPatchMeshListTotalStrips(bezierPatchMesh* list);
96 
97 int bezierPatchMeshListTotalVert(bezierPatchMesh* list);
98 int bezierPatchMeshNumTriangles(bezierPatchMesh* bpm);
99 int bezierPatchMeshListNumTriangles(bezierPatchMesh* list);
100 
101 void bezierPatchMeshDelDeg(bezierPatchMesh* bpm);
102 
103 
104 void bezierPatchMeshEval(bezierPatchMesh* bpm);
105 
106 void bezierPatchMeshDraw(bezierPatchMesh* bpm);
107 
108 void bezierPatchMeshListDraw(bezierPatchMesh* list);
109 void bezierPatchMeshListEval(bezierPatchMesh* list);
110 void bezierPatchMeshListCollect(bezierPatchMesh* list, float **vertex_array, float **normal_array, int **length_array, GLenum **type_array, int *num_strips);
111 
112 void bezierPatchMeshListDelDeg(bezierPatchMesh* list);
113 void bezierPatchMeshListDelete(bezierPatchMesh *list);
114 bezierPatchMesh* bezierPatchMeshListReverse(bezierPatchMesh* list);
115 void drawStrips(float *vertex_array, float *normal_array, int *length_array, GLenum *type_array, int num_strips);
116 
117 #ifdef __cplusplus
118 }
119 #endif
120 
121 #endif
122