[749] | 1 | #include <iostream>
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| 2 | using namespace std;
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| 3 | #include <ply.h>
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[752] | 4 | #include <stdio.h>
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[749] | 5 |
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| 6 | #include "PlyParser.h"
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| 7 |
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| 8 | #include "SceneGraph.h"
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| 9 | #include "Mesh.h"
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| 10 |
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| 11 |
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[752] | 12 | // int facesPerMesh = 100000000;
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| 13 | int facesPerMesh = 30;
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| 14 | bool useRandomMaterial = false;
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| 15 | bool indexVertices = true;
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[749] | 16 |
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| 17 | /* user's vertex and face definitions for a polygonal object */
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| 18 |
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| 19 | typedef struct Vertex {
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| 20 | int id;
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| 21 | float x,y,z;
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| 22 | void *other_props; /* other properties */
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| 23 | } Vertex;
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| 24 |
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| 25 | typedef struct PlyFace {
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| 26 | int id;
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| 27 | unsigned char nverts; /* number of vertex indices in list */
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| 28 | int *verts; /* vertex index list */
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| 29 | void *other_props; /* other properties */
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| 30 | } PlyFace;
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| 31 |
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| 32 |
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| 33 |
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| 34 | char *elem_names[] = { /* list of the kinds of elements in the user's object */
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| 35 | "vertex", "face"
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| 36 | };
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| 37 |
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[752] | 38 |
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[749] | 39 | PlyProperty vert_props[] = { /* list of property information for a vertex */
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| 40 | {"x", PLY_FLOAT, PLY_FLOAT, offsetof(Vertex,x), 0, 0, 0, 0},
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| 41 | {"y", PLY_FLOAT, PLY_FLOAT, offsetof(Vertex,y), 0, 0, 0, 0},
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| 42 | {"z", PLY_FLOAT, PLY_FLOAT, offsetof(Vertex,z), 0, 0, 0, 0}
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| 43 | };
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| 44 |
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| 45 | PlyProperty face_props[] = { /* list of property information for a face */
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| 46 | {"vertex_indices", PLY_INT, PLY_INT, offsetof(PlyFace,verts),
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| 47 | 1, PLY_UCHAR, PLY_UCHAR, offsetof(PlyFace,nverts)}
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| 48 | };
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| 49 |
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| 50 | unsigned char has_fverts;
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| 51 | static PlyFace **flist;
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| 52 |
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[752] | 53 |
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[749] | 54 | bool
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[752] | 55 | PlyParser::ParseSingleFile(const string filename,
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| 56 | SceneGraphNode *root)
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[749] | 57 | {
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[752] | 58 | /*** the PLY object ***/
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| 59 | int nverts;
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| 60 | Vertex **vlist;
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| 61 | PlyOtherElems *other_elements = NULL;
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| 62 | PlyOtherProp *vert_other;
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| 63 | int nelems;
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| 64 | char **elist;
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| 65 | int num_comments;
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| 66 | char **comments;
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| 67 | int num_obj_info;
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| 68 | char **obj_info;
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| 69 | int file_type;
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[749] | 70 |
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[752] | 71 | int i,j;
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| 72 | PlyFile *ply;
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| 73 | int nprops;
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| 74 | int num_elems;
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| 75 | PlyProperty **plist;
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| 76 | char *elem_name;
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| 77 | float version;
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| 78 |
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[749] | 79 |
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| 80 | /*** Read in the original PLY object ***/
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| 81 | FILE *file = fopen(filename.c_str(), "rb");
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| 82 |
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| 83 | ply = ply_read (file, &nelems, &elist);
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| 84 | ply_get_info (ply, &version, &file_type);
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| 85 |
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| 86 | int nfaces;
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| 87 |
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| 88 | for (i = 0; i < nelems; i++) {
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| 89 |
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| 90 | /* get the description of the first element */
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| 91 | elem_name = elist[i];
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| 92 | plist = ply_get_element_description (ply, elem_name, &num_elems, &nprops);
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| 93 |
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| 94 | if (equal_strings ("vertex", elem_name)) {
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| 95 |
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| 96 | /* create a vertex list to hold all the vertices */
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| 97 | vlist = (Vertex **) malloc (sizeof (Vertex *) * num_elems);
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| 98 | nverts = num_elems;
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| 99 |
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| 100 | /* set up for getting vertex elements */
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| 101 |
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| 102 | ply_get_property (ply, elem_name, &vert_props[0]);
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| 103 | ply_get_property (ply, elem_name, &vert_props[1]);
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| 104 | ply_get_property (ply, elem_name, &vert_props[2]);
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| 105 | vert_other = ply_get_other_properties (ply, elem_name,
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| 106 | offsetof(Vertex,other_props));
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| 107 |
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| 108 | /* grab all the vertex elements */
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| 109 | for (j = 0; j < num_elems; j++) {
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| 110 | vlist[j] = (Vertex *) malloc (sizeof (Vertex));
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| 111 | ply_get_element (ply, (void *) vlist[j]);
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| 112 | vlist[j]->id = j;
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| 113 | // cout<<"("<<vlist[j]->x<<","<<vlist[j]->y<<","<<vlist[j]->z<<")"<<endl;
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| 114 | }
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| 115 | }
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| 116 | else
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| 117 | if (equal_strings ("face", elem_name)) {
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| 118 | /* create a list to hold all the face elements */
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| 119 | ALLOCN(flist, PlyFace *, num_elems);
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| 120 | nfaces = num_elems;
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| 121 | cerr<<"num faces="<<nfaces<<endl;
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| 122 |
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| 123 | /* set up for getting face elements */
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| 124 | has_fverts = false;
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| 125 |
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| 126 | for (j=0; j<nprops; j++)
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| 127 | {
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| 128 | if (equal_strings("vertex_indices", plist[j]->name))
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| 129 | {
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| 130 | ply_get_property (ply, elem_name, &face_props[0]);
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| 131 | has_fverts = true;
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| 132 | }
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| 133 | }
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| 134 |
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| 135 | // face_other = ply_get_other_properties (ply, elem_name,
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| 136 | // offsetof(Face,other_props));
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| 137 |
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| 138 | /* test for necessary properties */
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| 139 | if (!has_fverts) {
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| 140 | fprintf(stderr,"Faces must have vertex indices\n");
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| 141 | exit(-1);
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| 142 | }
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| 143 |
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| 144 | /* grab all the face elements */
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| 145 | for (j = 0; j < num_elems; j++) {
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| 146 | ALLOCN(flist[j], PlyFace, 1);
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| 147 | ply_get_element (ply, (void *) flist[j]);
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| 148 | flist[j]->id = j;
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| 149 |
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| 150 | // for (int k = 0; k < flist[j]->nverts; k++)
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| 151 | // cout<<flist[j]->verts[k]<<" ";
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| 152 | // cout<<endl;
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| 153 | }
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| 154 | } else
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| 155 | other_elements = ply_get_other_element (ply, elem_name, num_elems);
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| 156 |
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| 157 |
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| 158 | }
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| 159 |
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| 160 |
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| 161 |
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| 162 | comments = ply_get_comments (ply, &num_comments);
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| 163 | obj_info = ply_get_obj_info (ply, &num_obj_info);
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| 164 |
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| 165 | ply_close (ply);
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| 166 |
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[752] | 167 | SceneGraphNode *currentNode = root;
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[749] | 168 |
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[752] | 169 | cerr<<"Baking faces into meshes"<<endl;
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[749] | 170 |
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[752] | 171 | // bake the faces into meshes
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| 172 | Mesh meshProxy;
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| 173 | // only one face per mesh
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| 174 | VertexContainer vertices;
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[749] | 175 |
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[752] | 176 | for (i = 0; i < nfaces; i++) {
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| 177 | if (i % facesPerMesh == 0) {
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| 178 | if (meshProxy.mFaces.size()) {
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[749] | 179 |
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[752] | 180 | if (indexVertices)
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| 181 | meshProxy.IndexVertices();
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| 182 |
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| 183 | Mesh *mesh = new Mesh(meshProxy.mVertices.size(),
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| 184 | meshProxy.mFaces.size());
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| 185 |
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| 186 |
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| 187 | // cout<<"C="<<mesh->mVertices.capacity();
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| 188 | mesh->mVertices = meshProxy.mVertices;
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| 189 | // cout<<" NC="<<mesh->mVertices.capacity()<<" S="<<mesh->mVertices.size()<<endl;
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| 190 |
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| 191 | mesh->mFaces = meshProxy.mFaces;
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| 192 |
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| 193 | if (useRandomMaterial)
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| 194 | mesh->AssignRandomMaterial();
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[749] | 195 |
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[752] | 196 | mesh->Preprocess();
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| 197 | // make an instance of this mesh
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| 198 | MeshInstance *mi = new MeshInstance(mesh);
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| 199 | currentNode->mGeometry.push_back(mi);
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[749] | 200 | }
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[752] | 201 |
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| 202 | meshProxy.Clear();
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| 203 | }
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[749] | 204 |
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[752] | 205 | // only one face per mesh
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| 206 | VertexIndexContainer vc;
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| 207 |
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| 208 | // add vertices
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| 209 | for (int k = 0; k < flist[i]->nverts; k++) {
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| 210 | Vertex *v = vlist[flist[i]->verts[k]];
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| 211 | vc.push_back(meshProxy.mVertices.size());
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| 212 | meshProxy.mVertices.push_back(Vector3(v->x, v->y, v->z));
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| 213 | }
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| 214 |
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| 215 | meshProxy.mFaces.push_back(new Face(vc));
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[749] | 216 | }
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| 217 |
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[752] | 218 | if (meshProxy.mFaces.size()) {
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| 219 |
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| 220 | if (indexVertices)
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| 221 | meshProxy.IndexVertices();
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| 222 |
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| 223 | Mesh *mesh = new Mesh(meshProxy.mVertices.size(),
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| 224 | meshProxy.mFaces.size());
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| 225 |
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| 226 | mesh->mVertices = meshProxy.mVertices;
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| 227 |
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| 228 | mesh->mFaces = meshProxy.mFaces;
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| 229 |
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| 230 | if (useRandomMaterial)
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| 231 | mesh->AssignRandomMaterial();
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| 232 |
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| 233 | mesh->Preprocess();
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| 234 | // make an instance of this mesh
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| 235 | MeshInstance *mi = new MeshInstance(mesh);
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| 236 | currentNode->mGeometry.push_back(mi);
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| 237 | }
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| 238 |
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| 239 | // make sure that no face gets deleted by the destructor!
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| 240 | meshProxy.Clear();
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| 241 |
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[749] | 242 | for (i=0; i < nverts; i++)
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| 243 | free(vlist[i]);
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[752] | 244 |
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[749] | 245 | free(vlist);
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| 246 |
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| 247 | for (i=0; i < nfaces; i++)
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| 248 | free(flist[i]);
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[752] | 249 |
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[749] | 250 | free(flist);
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| 251 |
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[752] | 252 |
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[749] | 253 | return true;
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[752] | 254 |
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| 255 |
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[749] | 256 | }
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[752] | 257 |
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| 258 | bool
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| 259 | PlyParser::ParseFile(const string filename,
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| 260 | SceneGraphNode **root,
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| 261 | const bool loadPolygonsAsMeshes)
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| 262 | {
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| 263 | vector<string> filelist;
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| 264 |
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| 265 | if (strstr(filename.c_str(), ".plb")) {
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| 266 | // parse the filelist
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| 267 | FILE *f = fopen(filename.c_str(), "rt");
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| 268 | char s[64];
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| 269 | if (!f) {
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| 270 | cerr<<"Cannot open .plb file"<<endl;
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| 271 | exit(1);
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| 272 | }
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| 273 | while (fgets(s,64,f)) {
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| 274 | // remove nl
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| 275 | s[strlen(s)-1] = 0;
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| 276 | filelist.push_back(s);
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| 277 | }
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| 278 | fclose(f);
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| 279 |
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| 280 | } else
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| 281 | filelist.push_back(filename);
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| 282 |
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| 283 | *root = new SceneGraphNode;
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| 284 |
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| 285 | for (int i=0; i < filelist.size(); i++) {
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| 286 | if (!ParseSingleFile(filelist[i], *root)) {
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| 287 | cerr<<"Ply parse error. Quiting ...\n";
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| 288 | exit(1);
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| 289 | }
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| 290 | }
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| 291 | return true;
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| 292 | }
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