static bool
stringMatches(const char *candidate, const char *pattern)
{
for (;;) {
if ('*' == *pattern) {
/* match successively longer prefixes of candidate against the asterisk */
for (++pattern;; ++candidate) {
if (stringMatches(candidate, pattern)) {
return true;
} else if ('\0' == *candidate) {
break;
}
}
break;
} else if (*candidate != *pattern) {
/* no match */
break;
} else if ('\0' == *pattern) {
/* match: at the end of both the string and the pattern with no conflicts */
return true;
} else {
++candidate;
++pattern;
}
}
return false;
}
static bool
stringMatchesAny(const string &candidate, const set<string> &patterns)
{
const char *c_candidate = candidate.c_str();
for (set<string>::const_iterator it = patterns.begin(); it != patterns.end(); ++it) {
const string &pattern = *it;
if (stringMatches(c_candidate, pattern.c_str())) {
return true;
}
}
return false;
}
void PLYReader::readFromPly(
std::vector<Object *> & scene_objects,
const std::string & filename) {
std::ifstream fileIn(filename);
std::string currLine;
getline(fileIn, currLine);
std::cout << "cl: " << currLine << std::endl;
assert(stringMatches(currLine, "ply"));
getline(fileIn, currLine);
assert(stringMatches(currLine, "format ascii 1.0"));
std::string currWord;
fileIn >> currWord;
assert(stringMatches(currWord, "element"));
fileIn >> currWord;
assert(stringMatches(currWord, "vertex"));
fileIn >> currWord;
std::string::size_type sz;
int numVertices = std::stoi(currWord, &sz);
std::cout << "num vertices = " << numVertices << std::endl;
getline(fileIn, currLine);
getline(fileIn, currLine);
assert(stringMatches(currLine, "property float x"));
getline(fileIn, currLine);
assert(stringMatches(currLine, "property float y"));
getline(fileIn, currLine);
assert(stringMatches(currLine, "property float z"));
fileIn >> currWord;
assert(stringMatches(currWord, "element"));
fileIn >> currWord;
assert(stringMatches(currWord, "face"));
fileIn >> currWord;
int numFaces = std::stoi(currWord, &sz);
std::cout << "num faces = " << numFaces << std::endl;
getline(fileIn, currLine);
getline(fileIn, currLine);
getline(fileIn, currLine);
assert(stringMatches(currLine, "end_header"));
std::vector<Vector3D> vertices;
for (int i = 0; i < numVertices; ++i) {
getline(fileIn, currLine);
std::istringstream iss(currLine);
iss >> currWord;
auto x = std::stod(currWord, &sz);
iss >> currWord;
auto y = std::stod(currWord, &sz);
iss >> currWord;
auto z = std::stod(currWord, &sz);
vertices.push_back(Vector3D(x, y, z));
}
for (int i = 0; i < numFaces; ++i) {
getline(fileIn, currLine);
std::istringstream iss(currLine);
iss >> currWord;
assert(currWord.compare("3") == 0);
iss >> currWord;
int iv1 = std::stoi(currWord, &sz);
iss >> currWord;
int iv2 = std::stoi(currWord, &sz);
iss >> currWord;
int iv3 = std::stoi(currWord, &sz);
Triangle * t = new Triangle(vertices[iv1], vertices[iv2], vertices[iv3], randColor());
scene_objects.push_back(dynamic_cast<Object *>(t));
}
}
