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obj_loader.cc
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obj_loader.cc
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/*
* Copyright 2014 Google Inc. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <string>
#include <fstream>
#include <android/asset_manager.h>
#include <unistd.h>
#include "tango-gl/obj_loader.h"
namespace tango_gl {
bool obj_loader::LoadOBJData(AAssetManager* mgr, const char* path, std::vector<GLfloat>& vertices,
std::vector<GLfloat>& normals) {
std::vector<unsigned int> vertexIndices, normalIndices;
std::vector<GLfloat> temp_vertices, temp_normals;
AAsset* asset = AAssetManager_open(mgr, path, AASSET_MODE_STREAMING);
if (asset == NULL) {
LOGE("Error opening asset %s", path);
return false;
}
off_t length;
off_t start;
int fd = AAsset_openFileDescriptor(asset, &start, &length);
lseek(fd, start, SEEK_CUR);
FILE* file = fdopen(fd, "r");
if (file == NULL) {
LOGE("Failed to open file: %s", path);
return false;
}
char lineHeader[128]; // max size of .obj line
char* pNext; // used to get next pointer of token
while(fgets(lineHeader, sizeof lineHeader, file) != NULL) {
if (strncmp(lineHeader, "v ", 2) == 0) {
GLfloat vertex[3];
vertex[0] = (GLfloat) strtof(lineHeader + 2, &pNext); // 2 lines to ignore the v char
vertex[1] = (GLfloat) strtof(pNext, &pNext);
vertex[2] = (GLfloat) strtof(pNext, NULL);
temp_vertices.push_back(vertex[0]);
temp_vertices.push_back(vertex[1]);
temp_vertices.push_back(vertex[2]);
} else if (strncmp(lineHeader, "vt ", 3) == 0) {
} else if (strncmp(lineHeader, "vn ", 3) == 0) {
GLfloat normal[3];
normal[0] = (GLfloat) strtof(lineHeader + 3, &pNext); // 3 lines to ignore the vn char
normal[1] = (GLfloat) strtof(pNext, &pNext);
normal[2] = (GLfloat) strtof(pNext, NULL);
temp_normals.push_back(normal[0]);
temp_normals.push_back(normal[1]);
temp_normals.push_back(normal[2]);
} else if (strncmp(lineHeader, "f ", 2) == 0) {
LOGE("F : %s", lineHeader);
unsigned int vertexIndex[4];
unsigned int textureIndex[4];
unsigned int normalIndex[4];
vertexIndex[0] = (unsigned int) strtol(lineHeader + 2, &pNext, 10);
textureIndex[0] = (unsigned int) strtol(pNext + 1, &pNext, 10);
normalIndex[0] = (unsigned int) strtol(pNext + 1, &pNext, 10);
vertexIndex[1] = (unsigned int) strtol(pNext, &pNext, 10);
textureIndex[1] = (unsigned int) strtol(pNext + 1, &pNext, 10);
normalIndex[1] = (unsigned int) strtol(pNext + 1, &pNext, 10);
vertexIndex[2] = (unsigned int) strtol(pNext, &pNext, 10);
textureIndex[2] = (unsigned int) strtol(pNext + 1, &pNext, 10);
normalIndex[2] = (unsigned int) strtol(pNext + 1, &pNext, 10);
vertexIndex[3] = (unsigned int) strtol(pNext, &pNext, 10);
textureIndex[3] = (unsigned int) strtol(pNext + 1, &pNext, 10);
normalIndex[3] = (unsigned int) strtol(pNext + 1, NULL, 10);
LOGE("CHECK: %u %u %u \n", vertexIndex[3], normalIndex[3], textureIndex[3]);
if (vertexIndex[0] == 0 || normalIndex[0] == 0 || textureIndex[0] == 0) {
// skip, last line
} else if (vertexIndex[3] == 0 || normalIndex[3] == 0 || textureIndex[3] == 0) {
//Only 3
LOGE("PUSH: %u %u %u \n", vertexIndex[0] - 1, vertexIndex[1] - 1, vertexIndex[2] - 1);
vertexIndices.push_back(vertexIndex[0] - 1);
vertexIndices.push_back(vertexIndex[1] - 1);
vertexIndices.push_back(vertexIndex[2] - 1);
normalIndices.push_back(normalIndex[0] - 1);
normalIndices.push_back(normalIndex[1] - 1);
normalIndices.push_back(normalIndex[2] - 1);
} else {
// If quads provided.
vertexIndices.push_back(vertexIndex[0] - 1);
vertexIndices.push_back(vertexIndex[1] - 1);
vertexIndices.push_back(vertexIndex[2] - 1);
vertexIndices.push_back(vertexIndex[0] - 1);
vertexIndices.push_back(vertexIndex[2] - 1);
vertexIndices.push_back(vertexIndex[3] - 1);
normalIndices.push_back(normalIndex[0] - 1);
normalIndices.push_back(normalIndex[1] - 1);
normalIndices.push_back(normalIndex[2] - 1);
normalIndices.push_back(normalIndex[0] - 1);
normalIndices.push_back(normalIndex[2] - 1);
normalIndices.push_back(normalIndex[3] - 1);
}
} else {
char comments_buffer[1000];
fgets(comments_buffer, 1000, file);
}
} //while loop
for (unsigned int i = 0; i < vertexIndices.size(); i++) {
unsigned int vertexIndex = vertexIndices[i];
unsigned int normalIndex = normalIndices[i];
vertices.push_back(temp_vertices[vertexIndex * 3]);
vertices.push_back(temp_vertices[vertexIndex * 3 + 1]);
vertices.push_back(temp_vertices[vertexIndex * 3 + 2]);
normals.push_back(temp_normals[normalIndex * 3]);
normals.push_back(temp_normals[normalIndex * 3 + 1]);
normals.push_back(temp_normals[normalIndex * 3 + 2]);
}
fclose(file);
AAsset_close(asset);
return true;
}
bool obj_loader::LoadOBJData(AAssetManager* mgr, const char* path, std::vector<GLfloat>& vertices,
std::vector<GLushort>& indices) {
// std::vector<unsigned int> vertexIndices, normalIndices;
// std::vector<GLfloat> temp_vertices, temp_normals;
//
// FILE* file = fopen(path, "r");
// if (file == NULL) {
// LOGE("Failed to open file: %s", path);
// return false;
// }
// while (1) {
// char lineHeader[128];
// int res = fscanf(file, "%s", lineHeader);
// if (res == EOF) break;
// if (strcmp(lineHeader, "v") == 0) {
// GLfloat vertex[3];
// int matches =
// fscanf(file, "%f %f %f\n", &vertex[0], &vertex[1], &vertex[2]);
// if (matches != 3) {
// LOGE("Format of 'v float float float' required for each vertice line");
// return false;
// }
// temp_vertices.push_back(vertex[0]);
// temp_vertices.push_back(vertex[1]);
// temp_vertices.push_back(vertex[2]);
// } else if (strcmp(lineHeader, "vn") == 0) {
// GLfloat normal[3];
// int matches =
// fscanf(file, "%f %f %f\n", &normal[0], &normal[1], &normal[2]);
// if (matches != 3) {
// LOGE("Format of 'vn float float float' required for each normal line");
// return false;
// }
// temp_normals.push_back(normal[0]);
// temp_normals.push_back(normal[1]);
// temp_normals.push_back(normal[2]);
// } else if (strcmp(lineHeader, "f") == 0) {
// unsigned int vertexIndex[4];
// unsigned int normalIndex[4];
// unsigned int textureIndex[4];
// int matches = fscanf(file, "%d//%d %d//%d %d//%d %d//%d\n",
// &vertexIndex[0], &normalIndex[0], &vertexIndex[1],
// &normalIndex[1], &vertexIndex[2], &normalIndex[2],
// &vertexIndex[3], &normalIndex[3]);
// // If the exported obj file includes texture face indices information,
// // we still support the loading
// if ((matches != 6) && (matches != 8)) {
// // to use "%d/%d %d/%d/%d %d/%d/%d %d/%d/%d\n" since we already have
// // one match in the previous scan.
// matches = fscanf(file, "%d/%d %d/%d/%d %d/%d/%d %d/%d/%d\n",
// &textureIndex[0], &normalIndex[0], &vertexIndex[1],
// &textureIndex[1], &normalIndex[1], &vertexIndex[2],
// &textureIndex[2], &normalIndex[2], &vertexIndex[3],
// &textureIndex[3], &normalIndex[3]);
// // Adding one count back to matches to count for the one we already
// // matched.
// matches += 1;
// }
// // .obj file is 1-indexed, so subtract 1 from all indices.
// if (matches == 6 || matches == 9) {
// // If triangles provided.
// vertexIndices.push_back(vertexIndex[0] - 1);
// vertexIndices.push_back(vertexIndex[1] - 1);
// vertexIndices.push_back(vertexIndex[2] - 1);
// normalIndices.push_back(normalIndex[0] - 1);
// normalIndices.push_back(normalIndex[1] - 1);
// normalIndices.push_back(normalIndex[2] - 1);
// } else if (matches == 8 || matches == 12) {
// // If quads provided.
// vertexIndices.push_back(vertexIndex[0] - 1);
// vertexIndices.push_back(vertexIndex[1] - 1);
// vertexIndices.push_back(vertexIndex[2] - 1);
// vertexIndices.push_back(vertexIndex[0] - 1);
// vertexIndices.push_back(vertexIndex[2] - 1);
// vertexIndices.push_back(vertexIndex[3] - 1);
// normalIndices.push_back(normalIndex[0] - 1);
// normalIndices.push_back(normalIndex[1] - 1);
// normalIndices.push_back(normalIndex[2] - 1);
// normalIndices.push_back(normalIndex[0] - 1);
// normalIndices.push_back(normalIndex[2] - 1);
// normalIndices.push_back(normalIndex[3] - 1);
// } else {
// LOGE(
// "Format of 'f int/int/int int/int/int int/int/int (int/int/int)' "
// "or 'f int//int int//int int//int (int//int)' required for each "
// "face");
// return false;
// }
// } else {
// char comments_buffer[1000];
// fgets(comments_buffer, 1000, file);
// }
// }
// for (unsigned int i = 0; i < vertexIndices.size(); i++) {
// unsigned int vertexIndex = vertexIndices[i];
// unsigned int normalIndex = normalIndices[i];
//
// vertices.push_back(temp_vertices[vertexIndex * 3]);
// vertices.push_back(temp_vertices[vertexIndex * 3 + 1]);
// vertices.push_back(temp_vertices[vertexIndex * 3 + 2]);
// normals.push_back(temp_normals[normalIndex * 3]);
// normals.push_back(temp_normals[normalIndex * 3 + 1]);
// normals.push_back(temp_normals[normalIndex * 3 + 2]);
// }
// fclose(file);
return true;
}
bool obj_loader::LoadOBJData(AAssetManager* mgr, const char* path, std::vector<GLfloat>& vertices,
std::vector<GLfloat>& normals, std::vector<GLfloat>& textures) {
std::vector<unsigned int> vertexIndices, normalIndices, textureIndices;
std::vector<GLfloat> temp_vertices, temp_normals, temp_textures;
AAsset* asset = AAssetManager_open(mgr, path, AASSET_MODE_STREAMING);
if (asset == NULL) {
LOGE("Error opening asset %s", path);
return false;
}
off_t length;
off_t start;
int fd = AAsset_openFileDescriptor(asset, &start, &length);
lseek(fd, start, SEEK_CUR);
FILE* file = fdopen(fd, "r");
if (file == NULL) {
LOGE("Failed to open file: %s", path);
return false;
}
char lineHeader[128]; // max size of .obj line
char* pNext; // used to get next pointer of token
while(fgets(lineHeader, sizeof lineHeader, file) != NULL) {
if (strncmp(lineHeader, "v ", 2) == 0) {
GLfloat vertex[3];
vertex[0] = (GLfloat) strtof(lineHeader + 2, &pNext); // 2 lines to ignore the v char
vertex[1] = (GLfloat) strtof(pNext, &pNext);
vertex[2] = (GLfloat) strtof(pNext, NULL);
temp_vertices.push_back(vertex[0]);
temp_vertices.push_back(vertex[1]);
temp_vertices.push_back(vertex[2]);
} else if (strncmp(lineHeader, "vt ", 3) == 0) {
GLfloat texture[2];
texture[0] = (GLfloat) strtof(lineHeader + 3, &pNext); // 3 lines to ignore the vt char
texture[1] = (GLfloat) strtof(pNext, NULL);
temp_textures.push_back(texture[0]);
temp_textures.push_back(texture[1]);
} else if (strncmp(lineHeader, "vn ", 3) == 0) {
GLfloat normal[3];
normal[0] = (GLfloat) strtof(lineHeader + 3, &pNext); // 3 lines to ignore the vn char
normal[1] = (GLfloat) strtof(pNext, &pNext);
normal[2] = (GLfloat) strtof(pNext, NULL);
temp_normals.push_back(normal[0]);
temp_normals.push_back(normal[1]);
temp_normals.push_back(normal[2]);
} else if (strncmp(lineHeader, "f ", 2) == 0) {
// LOGE("F : %s", lineHeader);
unsigned int vertexIndex[4];
unsigned int textureIndex[4];
unsigned int normalIndex[4];
vertexIndex[0] = (unsigned int) strtol(lineHeader + 2, &pNext, 10);
textureIndex[0] = (unsigned int) strtol(pNext + 1, &pNext, 10);
normalIndex[0] = (unsigned int) strtol(pNext + 1, &pNext, 10);
vertexIndex[1] = (unsigned int) strtol(pNext, &pNext, 10);
textureIndex[1] = (unsigned int) strtol(pNext + 1, &pNext, 10);
normalIndex[1] = (unsigned int) strtol(pNext + 1, &pNext, 10);
vertexIndex[2] = (unsigned int) strtol(pNext, &pNext, 10);
textureIndex[2] = (unsigned int) strtol(pNext + 1, &pNext, 10);
normalIndex[2] = (unsigned int) strtol(pNext + 1, &pNext, 10);
vertexIndex[3] = (unsigned int) strtol(pNext, &pNext, 10);
textureIndex[3] = (unsigned int) strtol(pNext + 1, &pNext, 10);
normalIndex[3] = (unsigned int) strtol(pNext + 1, NULL, 10);
// LOGE("CHECK: %u %u %u \n", vertexIndex[3], normalIndex[3], textureIndex[3]);
if (vertexIndex[0] == 0 || normalIndex[0] == 0 || textureIndex[0] == 0) {
// skip, last line
} else if (vertexIndex[3] == 0 || normalIndex[3] == 0 || textureIndex[3] == 0) {
//Only 3
// LOGE("PUSH: %u %u %u \n", vertexIndex[0] - 1, vertexIndex[1] - 1, vertexIndex[2] - 1);
vertexIndices.push_back(vertexIndex[0] - 1);
vertexIndices.push_back(vertexIndex[1] - 1);
vertexIndices.push_back(vertexIndex[2] - 1);
normalIndices.push_back(normalIndex[0] - 1);
normalIndices.push_back(normalIndex[1] - 1);
normalIndices.push_back(normalIndex[2] - 1);
textureIndices.push_back(textureIndex[0] - 1);
textureIndices.push_back(textureIndex[1] - 1);
textureIndices.push_back(textureIndex[2] - 1);
} else {
// If quads provided.
vertexIndices.push_back(vertexIndex[0] - 1);
vertexIndices.push_back(vertexIndex[1] - 1);
vertexIndices.push_back(vertexIndex[2] - 1);
vertexIndices.push_back(vertexIndex[0] - 1);
vertexIndices.push_back(vertexIndex[2] - 1);
vertexIndices.push_back(vertexIndex[3] - 1);
normalIndices.push_back(normalIndex[0] - 1);
normalIndices.push_back(normalIndex[1] - 1);
normalIndices.push_back(normalIndex[2] - 1);
normalIndices.push_back(normalIndex[0] - 1);
normalIndices.push_back(normalIndex[2] - 1);
normalIndices.push_back(normalIndex[3] - 1);
textureIndices.push_back(textureIndex[0] - 1);
textureIndices.push_back(textureIndex[1] - 1);
textureIndices.push_back(textureIndex[2] - 1);
textureIndices.push_back(textureIndex[0] - 1);
textureIndices.push_back(textureIndex[2] - 1);
textureIndices.push_back(textureIndex[3] - 1);
}
} else {
char comments_buffer[1000];
fgets(comments_buffer, 1000, file);
}
} //while loop
for (unsigned int i = 0; i < vertexIndices.size(); i++) {
unsigned int vertexIndex = vertexIndices[i];
unsigned int normalIndex = normalIndices[i];
unsigned int textureIndex = textureIndices[i];
vertices.push_back(temp_vertices[vertexIndex * 3]);
vertices.push_back(temp_vertices[vertexIndex * 3 + 1]);
vertices.push_back(temp_vertices[vertexIndex * 3 + 2]);
normals.push_back(temp_normals[normalIndex * 3]);
normals.push_back(temp_normals[normalIndex * 3 + 1]);
normals.push_back(temp_normals[normalIndex * 3 + 2]);
textures.push_back(temp_textures[textureIndex * 3]);
textures.push_back(temp_textures[textureIndex * 3 + 1]);
}
fclose(file);
AAsset_close(asset);
return true;
}
} // namespace tango_gl
/*GLushort vertexIndex[3];
int matches = fscanf(file, "%hu %hu %hu\n", &vertexIndex[0],
&vertexIndex[1], &vertexIndex[2]);
if (matches != 3) {
LOGE("Format of 'f int int int' required for each face line");
return false;
}
indices.push_back(vertexIndex[0] - 1);
indices.push_back(vertexIndex[1] - 1);
indices.push_back(vertexIndex[2] - 1);*/