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      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