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