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/*
* OpenSCAD (www.openscad.org)
* Copyright (C) 2009-2011 Clifford Wolf <clifford@clifford.at> and
* Marius Kintel <marius@kintel.net>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* As a special exception, you have permission to link this program
* with the CGAL library and distribute executables, as long as you
* follow the requirements of the GNU GPL in regard to all of the
* software in the executable aside from CGAL.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include "dxfdim.h"
#include "value.h"
#include "function.h"
#include "dxfdata.h"
#include "builtin.h"
#include "printutils.h"
#include "fileutils.h"
#include "evalcontext.h"
#include "mathc99.h"
#include <sstream>
#include <stdint.h>
#include <boost/filesystem.hpp>
boost::unordered_map<std::string,Value> dxf_dim_cache;
boost::unordered_map<std::string,Value> dxf_cross_cache;
namespace fs = boost::filesystem;
Value builtin_dxf_dim(const Context *ctx, const EvalContext *evalctx)
{
std::string filename;
std::string layername;
std::string name;
double xorigin = 0;
double yorigin = 0;
double scale = 1;
// FIXME: We don't lookup the file relative to where this function was instantiated
// since the path is only available for ModuleInstantiations, not function expressions.
// See issue #217
for (size_t i = 0; i < evalctx->numArgs(); i++) {
if (evalctx->getArgName(i) == "file")
filename = lookup_file(evalctx->getArgValue(i).toString(),
evalctx->documentPath(), ctx->documentPath());
if (evalctx->getArgName(i) == "layer")
layername = evalctx->getArgValue(i).toString();
if (evalctx->getArgName(i) == "origin")
evalctx->getArgValue(i).getVec2(xorigin, yorigin);
if (evalctx->getArgName(i) == "scale")
evalctx->getArgValue(i).getDouble(scale);
if (evalctx->getArgName(i) == "name")
name = evalctx->getArgValue(i).toString();
}
std::stringstream keystream;
fs::path filepath(filename);
uintmax_t filesize = -1;
time_t lastwritetime = -1;
if (fs::exists(filepath) && fs::is_regular_file(filepath)) {
filesize = fs::file_size(filepath);
lastwritetime = fs::last_write_time(filepath);
}
keystream << filename << "|" << layername << "|" << name << "|" << xorigin
<< "|" << yorigin <<"|" << scale << "|" << lastwritetime
<< "|" << filesize;
std::string key = keystream.str();
if (dxf_dim_cache.find(key) != dxf_dim_cache.end())
return dxf_dim_cache.find(key)->second;
DxfData dxf(36, 0, 0, filename, layername, xorigin, yorigin, scale);
for (size_t i = 0; i < dxf.dims.size(); i++)
{
if (!name.empty() && dxf.dims[i].name != name)
continue;
DxfData::Dim *d = &dxf.dims[i];
int type = d->type & 7;
if (type == 0) {
// Rotated, horizontal or vertical
double x = d->coords[4][0] - d->coords[3][0];
double y = d->coords[4][1] - d->coords[3][1];
double angle = d->angle;
double distance_projected_on_line = fabs(x * cos(angle*M_PI/180) + y * sin(angle*M_PI/180));
return dxf_dim_cache[key] = Value(distance_projected_on_line);
}
else if (type == 1) {
// Aligned
double x = d->coords[4][0] - d->coords[3][0];
double y = d->coords[4][1] - d->coords[3][1];
return dxf_dim_cache[key] = Value(sqrt(x*x + y*y));
}
else if (type == 2) {
// Angular
double a1 = atan2(d->coords[0][0] - d->coords[5][0], d->coords[0][1] - d->coords[5][1]);
double a2 = atan2(d->coords[4][0] - d->coords[3][0], d->coords[4][1] - d->coords[3][1]);
return dxf_dim_cache[key] = Value(fabs(a1 - a2) * 180 / M_PI);
}
else if (type == 3 || type == 4) {
// Diameter or Radius
double x = d->coords[5][0] - d->coords[0][0];
double y = d->coords[5][1] - d->coords[0][1];
return dxf_dim_cache[key] = Value(sqrt(x*x + y*y));
}
else if (type == 5) {
// Angular 3 Point
}
else if (type == 6) {
// Ordinate
return dxf_dim_cache[key] = Value((d->type & 64) ? d->coords[3][0] : d->coords[3][1]);
}
PRINTB("WARNING: Dimension '%s' in '%s', layer '%s' has unsupported type!",
name % filename % layername);
return Value();
}
PRINTB("WARNING: Can't find dimension '%s' in '%s', layer '%s'!",
name % filename % layername);
return Value();
}
Value builtin_dxf_cross(const Context *ctx, const EvalContext *evalctx)
{
std::string filename;
std::string layername;
double xorigin = 0;
double yorigin = 0;
double scale = 1;
// FIXME: We don't lookup the file relative to where this function was instantiated
// since the path is only available for ModuleInstantiations, not function expressions.
// See isse #217
for (size_t i = 0; i < evalctx->numArgs(); i++) {
if (evalctx->getArgName(i) == "file")
filename = ctx->getAbsolutePath(evalctx->getArgValue(i).toString());
if (evalctx->getArgName(i) == "layer")
layername = evalctx->getArgValue(i).toString();
if (evalctx->getArgName(i) == "origin")
evalctx->getArgValue(i).getVec2(xorigin, yorigin);
if (evalctx->getArgName(i) == "scale")
evalctx->getArgValue(i).getDouble(scale);
}
std::stringstream keystream;
fs::path filepath(filename);
uintmax_t filesize = -1;
time_t lastwritetime = -1;
if (fs::exists(filepath) && fs::is_regular_file(filepath)) {
filesize = fs::file_size(filepath);
lastwritetime = fs::last_write_time(filepath);
}
keystream << filename << "|" << layername << "|" << xorigin << "|" << yorigin
<< "|" << scale << "|" << lastwritetime
<< "|" << filesize;
std::string key = keystream.str();
if (dxf_cross_cache.find(key) != dxf_cross_cache.end())
return dxf_cross_cache.find(key)->second;
DxfData dxf(36, 0, 0, filename, layername, xorigin, yorigin, scale);
double coords[4][2];
for (size_t i = 0, j = 0; i < dxf.paths.size(); i++) {
if (dxf.paths[i].indices.size() != 2)
continue;
coords[j][0] = dxf.points[dxf.paths[i].indices[0]][0];
coords[j++][1] = dxf.points[dxf.paths[i].indices[0]][1];
coords[j][0] = dxf.points[dxf.paths[i].indices[1]][0];
coords[j++][1] = dxf.points[dxf.paths[i].indices[1]][1];
if (j == 4) {
double x1 = coords[0][0], y1 = coords[0][1];
double x2 = coords[1][0], y2 = coords[1][1];
double x3 = coords[2][0], y3 = coords[2][1];
double x4 = coords[3][0], y4 = coords[3][1];
double dem = (y4 - y3)*(x2 - x1) - (x4 - x3)*(y2 - y1);
if (dem == 0)
break;
double ua = ((x4 - x3)*(y1 - y3) - (y4 - y3)*(x1 - x3)) / dem;
// double ub = ((x2 - x1)*(y1 - y3) - (y2 - y1)*(x1 - x3)) / dem;
double x = x1 + ua*(x2 - x1);
double y = y1 + ua*(y2 - y1);
Value::VectorType ret;
ret.push_back(Value(x));
ret.push_back(Value(y));
return dxf_cross_cache[key] = Value(ret);
}
}
PRINTB("WARNING: Can't find cross in '%s', layer '%s'!", filename % layername);
return Value();
}
void initialize_builtin_dxf_dim()
{
Builtins::init("dxf_dim", new BuiltinFunction(&builtin_dxf_dim));
Builtins::init("dxf_cross", new BuiltinFunction(&builtin_dxf_cross));
}
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