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OrcaSlicer/src/libslic3r/Format/PRUS.cpp
Vojtech Bubnik 067cde85f1 WIP Refactoring of exceptions: 
1) All slicer's exceptions are now derived from Slic3r::Exception.
2) New exceptions are defined for slicing errors.
3) Exceptions are propagated to the Plater to show.
It remains to modify the slicing back-end to throw the new SlicingError
exceptions instead of std::runtime_error and to show the other exceptions
by a message dialog instead of a notification.
2020-09-14 18:03:22 +02:00

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#include <string.h>
#include <exception>
#include <boost/algorithm/string.hpp>
#include <boost/nowide/convert.hpp>
#include <boost/nowide/cstdio.hpp>
#include "miniz_extension.hpp"
#include <Eigen/Geometry>
#include "../libslic3r.h"
#include "../Model.hpp"
#include "PRUS.hpp"
#if 0
// Enable debugging and assert in this file.
#define DEBUG
#define _DEBUG
#undef NDEBUG
#endif
#include <assert.h>
namespace Slic3r
{
struct StlHeader
{
char comment[80];
uint32_t nTriangles;
};
static_assert(sizeof(StlHeader) == 84, "StlHeader size not correct");
// Buffered line reader to a string buffer.
class LineReader
{
public:
LineReader(std::vector<char> &data) : m_buffer(data), m_pos(0), m_len((int)data.size()) {}
const char* next_line() {
// Skip empty lines.
while (m_pos < m_len && (m_buffer[m_pos] == '\r' || m_buffer[m_pos] == '\n'))
++ m_pos;
if (m_pos == m_len) {
// End of file.
return nullptr;
}
// The buffer is nonempty and it does not start with end of lines. Find the first end of line.
int end = m_pos + 1;
while (end < m_len && m_buffer[end] != '\r' && m_buffer[end] != '\n')
++ end;
char *ptr_out = m_buffer.data() + m_pos;
m_pos = end + 1;
m_buffer[end] = 0;
return ptr_out;
}
int next_line_scanf(const char *format, ...)
{
const char *line = next_line();
if (line == nullptr)
return -1;
int result;
va_list arglist;
va_start(arglist, format);
result = vsscanf(line, format, arglist);
va_end(arglist);
return result;
}
private:
std::vector<char> &m_buffer;
int m_pos;
int m_len;
};
static void extract_model_from_archive(
// name of the model file
const char *name,
// path to the archive
const char *path,
// content of scene.xml
const std::vector<char> &scene_xml_data,
// loaded data of this STL
std::vector<char> &data,
// Model, to which the newly loaded objects will be added
Model *model,
// To map multiple STLs into a single model object for multi-material prints.
std::map<int, ModelObject*> &group_to_model_object)
{
// Find the model entry in the XML data.
char model_name_tag[1024];
sprintf(model_name_tag, "<model name=\"%s\">", name);
const char *model_xml = strstr(scene_xml_data.data(), model_name_tag);
const char *zero_tag = "<zero>";
const char *zero_xml = strstr(scene_xml_data.data(), zero_tag);
Vec3d instance_rotation = Vec3d::Zero();
Vec3d instance_scaling_factor = Vec3d::Ones();
Vec3d instance_offset = Vec3d::Zero();
bool trafo_set = false;
unsigned int group_id = (unsigned int)-1;
unsigned int extruder_id = (unsigned int)-1;
ModelObject *model_object = nullptr;
if (model_xml != nullptr) {
model_xml += strlen(model_name_tag);
const char *position_tag = "<position>";
const char *position_xml = strstr(model_xml, position_tag);
const char *rotation_tag = "<rotation>";
const char *rotation_xml = strstr(model_xml, rotation_tag);
const char *scale_tag = "<scale>";
const char *scale_xml = strstr(model_xml, scale_tag);
float position[3], rotation[3], scale[3], zero[3];
if (position_xml != nullptr && rotation_xml != nullptr && scale_xml != nullptr && zero_xml != nullptr &&
sscanf(position_xml+strlen(position_tag),
"[%f, %f, %f]", position, position+1, position+2) == 3 &&
sscanf(rotation_xml+strlen(rotation_tag),
"[%f, %f, %f]", rotation, rotation+1, rotation+2) == 3 &&
sscanf(scale_xml+strlen(scale_tag),
"[%f, %f, %f]", scale, scale+1, scale+2) == 3 &&
sscanf(zero_xml+strlen(zero_tag),
"[%f, %f, %f]", zero, zero+1, zero+2) == 3) {
instance_scaling_factor = Vec3d((double)scale[0], (double)scale[1], (double)scale[2]);
instance_rotation = Vec3d(-(double)rotation[0], -(double)rotation[1], -(double)rotation[2]);
instance_offset = Vec3d((double)(position[0] - zero[0]), (double)(position[1] - zero[1]), (double)(position[2] - zero[2]));
trafo_set = true;
}
const char *group_tag = "<group>";
const char *group_xml = strstr(model_xml, group_tag);
const char *extruder_tag = "<extruder>";
const char *extruder_xml = strstr(model_xml, extruder_tag);
if (group_xml != nullptr) {
int group = atoi(group_xml + strlen(group_tag));
if (group > 0) {
group_id = group;
auto it = group_to_model_object.find(group_id);
if (it != group_to_model_object.end())
model_object = it->second;
}
}
if (extruder_xml != nullptr) {
int e = atoi(extruder_xml + strlen(extruder_tag));
if (e > 0)
extruder_id = e;
}
}
if (! trafo_set)
throw Slic3r::FileIOError(std::string("Archive ") + path + " does not contain a valid entry in scene.xml for " + name);
// Extract the STL.
StlHeader header;
TriangleMesh mesh;
bool mesh_valid = false;
bool stl_ascii = false;
if (data.size() > sizeof(StlHeader)) {
memcpy((char*)&header, data.data(), sizeof(StlHeader));
if (strncmp(header.comment, "solid ", 6) == 0)
stl_ascii = true;
else {
// Header has been extracted. Now read the faces.
stl_file &stl = mesh.stl;
stl.stats.type = inmemory;
stl.stats.number_of_facets = header.nTriangles;
stl.stats.original_num_facets = header.nTriangles;
stl_allocate(&stl);
if (header.nTriangles > 0 && data.size() == 50 * header.nTriangles + sizeof(StlHeader)) {
memcpy((char*)stl.facet_start.data(), data.data() + sizeof(StlHeader), 50 * header.nTriangles);
if (sizeof(stl_facet) > SIZEOF_STL_FACET) {
// The stl.facet_start is not packed tightly. Unpack the array of stl_facets.
unsigned char *data = (unsigned char*)stl.facet_start.data();
for (size_t i = header.nTriangles - 1; i > 0; -- i)
memmove(data + i * sizeof(stl_facet), data + i * SIZEOF_STL_FACET, SIZEOF_STL_FACET);
}
// All the faces have been read.
stl_get_size(&stl);
mesh.repair();
if (std::abs(stl.stats.min(2)) < EPSILON)
stl.stats.min(2) = 0.;
// Add a mesh to a model.
if (mesh.facets_count() > 0)
mesh_valid = true;
}
}
} else
stl_ascii = true;
if (stl_ascii) {
// Try to parse ASCII STL.
char normal_buf[3][32];
stl_facet facet;
std::vector<stl_facet> facets;
LineReader line_reader(data);
std::string solid_name;
facet.extra[0] = facet.extra[1] = 0;
for (;;) {
const char *line = line_reader.next_line();
if (line == nullptr)
// End of file.
break;
if (strncmp(line, "solid", 5) == 0) {
// Opening the "solid" block.
if (! solid_name.empty()) {
// Error, solid block is already open.
facets.clear();
break;
}
solid_name = line + 5;
if (solid_name.empty())
solid_name = "unknown";
continue;
}
if (strncmp(line, "endsolid", 8) == 0) {
// Closing the "solid" block.
if (solid_name.empty()) {
// Error, no solid block is open.
facets.clear();
break;
}
solid_name.clear();
continue;
}
// Line has to start with the word solid.
int res_normal = sscanf(line, " facet normal %31s %31s %31s", normal_buf[0], normal_buf[1], normal_buf[2]);
assert(res_normal == 3);
int res_outer_loop = line_reader.next_line_scanf(" outer loop");
assert(res_outer_loop == 0);
int res_vertex1 = line_reader.next_line_scanf(" vertex %f %f %f", &facet.vertex[0](0), &facet.vertex[0](1), &facet.vertex[0](2));
assert(res_vertex1 == 3);
int res_vertex2 = line_reader.next_line_scanf(" vertex %f %f %f", &facet.vertex[1](0), &facet.vertex[1](1), &facet.vertex[1](2));
assert(res_vertex2 == 3);
int res_vertex3 = line_reader.next_line_scanf(" vertex %f %f %f", &facet.vertex[2](0), &facet.vertex[2](1), &facet.vertex[2](2));
assert(res_vertex3 == 3);
int res_endloop = line_reader.next_line_scanf(" endloop");
assert(res_endloop == 0);
int res_endfacet = line_reader.next_line_scanf(" endfacet");
if (res_normal != 3 || res_outer_loop != 0 || res_vertex1 != 3 || res_vertex2 != 3 || res_vertex3 != 3 || res_endloop != 0 || res_endfacet != 0) {
// perror("Something is syntactically very wrong with this ASCII STL!");
facets.clear();
break;
}
// The facet normal has been parsed as a single string as to workaround for not a numbers in the normal definition.
if (sscanf(normal_buf[0], "%f", &facet.normal(0)) != 1 ||
sscanf(normal_buf[1], "%f", &facet.normal(1)) != 1 ||
sscanf(normal_buf[2], "%f", &facet.normal(2)) != 1) {
// Normal was mangled. Maybe denormals or "not a number" were stored?
// Just reset the normal and silently ignore it.
facet.normal = stl_normal::Zero();
}
facets.emplace_back(facet);
}
if (! facets.empty() && solid_name.empty()) {
stl_file &stl = mesh.stl;
stl.stats.type = inmemory;
stl.stats.number_of_facets = (uint32_t)facets.size();
stl.stats.original_num_facets = (int)facets.size();
stl_allocate(&stl);
memcpy((void*)stl.facet_start.data(), facets.data(), facets.size() * 50);
stl_get_size(&stl);
mesh.repair();
// Add a mesh to a model.
if (mesh.facets_count() > 0)
mesh_valid = true;
}
}
if (! mesh_valid)
throw Slic3r::FileIOError(std::string("Archive ") + path + " does not contain a valid mesh for " + name);
// Add this mesh to the model.
ModelVolume *volume = nullptr;
if (model_object == nullptr) {
// This is a first mesh of a group. Create a new object & volume.
model_object = model->add_object(name, path, std::move(mesh));
volume = model_object->volumes.front();
ModelInstance *instance = model_object->add_instance();
instance->set_rotation(instance_rotation);
instance->set_scaling_factor(instance_scaling_factor);
instance->set_offset(instance_offset);
if (group_id != (unsigned int)(-1))
group_to_model_object[group_id] = model_object;
} else {
// This is not the 1st mesh of a group. Add it to the ModelObject.
volume = model_object->add_volume(std::move(mesh));
volume->name = name;
}
// Set the extruder to the volume.
if (extruder_id != (unsigned int)-1) {
char str_extruder[64];
sprintf(str_extruder, "%ud", extruder_id);
volume->config.set_deserialize("extruder", str_extruder);
}
}
// Load a PrusaControl project file into a provided model.
bool load_prus(const char *path, Model *model)
{
mz_zip_archive archive;
mz_zip_zero_struct(&archive);
size_t n_models_initial = model->objects.size();
mz_bool res = MZ_FALSE;
try {
if (!open_zip_reader(&archive, path))
throw Slic3r::FileIOError(std::string("Unable to init zip reader for ") + path);
std::vector<char> scene_xml_data;
// For grouping multiple STLs into a single ModelObject for multi-material prints.
std::map<int, ModelObject*> group_to_model_object;
mz_uint num_entries = mz_zip_reader_get_num_files(&archive);
for (mz_uint i = 0; i < num_entries; ++ i) {
mz_zip_archive_file_stat stat;
if (! mz_zip_reader_file_stat(&archive, i, &stat))
continue;
std::vector<char> buffer;
buffer.assign((size_t)stat.m_uncomp_size, 0);
res = mz_zip_reader_extract_file_to_mem(&archive, stat.m_filename, (char*)buffer.data(), (size_t)stat.m_uncomp_size, 0);
if (res == MZ_FALSE)
throw Slic3r::FileIOError(std::string("Error while extracting a file from ") + path);
if (strcmp(stat.m_filename, "scene.xml") == 0) {
if (! scene_xml_data.empty())
throw Slic3r::FileIOError(std::string("Multiple scene.xml were found in the archive.") + path);
scene_xml_data = std::move(buffer);
} else if (boost::iends_with(stat.m_filename, ".stl")) {
// May throw std::exception
extract_model_from_archive(stat.m_filename, path, scene_xml_data, buffer, model, group_to_model_object);
}
}
} catch (std::exception &ex) {
close_zip_reader(&archive);
throw ex;
}
close_zip_reader(&archive);
return model->objects.size() > n_models_initial;
}
}; // namespace Slic3r
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