mirror of https://github.com/vitalif/openscad
654 lines
18 KiB
C++
654 lines
18 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 "module.h"
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#include "node.h"
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#include "polyset.h"
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#include "evalcontext.h"
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#include "dxfdata.h"
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#include "dxftess.h"
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#include "builtin.h"
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#include "printutils.h"
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#include "visitor.h"
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#include "context.h"
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#include "calc.h"
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#include "mathc99.h"
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#include <sstream>
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#include <assert.h>
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#include <boost/assign/std/vector.hpp>
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using namespace boost::assign; // bring 'operator+=()' into scope
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#include <boost/math/special_functions/fpclassify.hpp>
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using boost::math::isinf;
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#define F_MINIMUM 0.01
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enum primitive_type_e {
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CUBE,
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SPHERE,
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CYLINDER,
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POLYHEDRON,
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SQUARE,
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CIRCLE,
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POLYGON
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};
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class PrimitiveModule : public AbstractModule
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{
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public:
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primitive_type_e type;
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PrimitiveModule(primitive_type_e type) : type(type) { }
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virtual AbstractNode *instantiate(const Context *ctx, const ModuleInstantiation *inst, const EvalContext *evalctx) const;
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private:
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Value lookup_radius(const Context &ctx, const std::string &radius_var, const std::string &diameter_var) const;
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};
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class PrimitiveNode : public AbstractPolyNode
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{
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public:
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PrimitiveNode(const ModuleInstantiation *mi, primitive_type_e type) : AbstractPolyNode(mi), type(type) { }
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virtual Response accept(class State &state, Visitor &visitor) const {
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return visitor.visit(state, *this);
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}
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virtual std::string toString() const;
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virtual std::string name() const {
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switch (this->type) {
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case CUBE:
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return "cube";
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break;
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case SPHERE:
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return "sphere";
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break;
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case CYLINDER:
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return "cylinder";
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break;
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case POLYHEDRON:
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return "polyhedron";
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break;
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case SQUARE:
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return "square";
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break;
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case CIRCLE:
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return "circle";
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break;
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case POLYGON:
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return "polygon";
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break;
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default:
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assert(false && "PrimitiveNode::name(): Unknown primitive type");
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return AbstractPolyNode::name();
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}
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}
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bool center;
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double x, y, z, h, r1, r2;
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double fn, fs, fa;
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primitive_type_e type;
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int convexity;
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Value points, paths, faces;
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virtual PolySet *evaluate_polyset(class PolySetEvaluator *) const;
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};
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/**
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* Return a radius value by looking up both a diameter and radius variable.
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* The diameter has higher priority, so if found an additionally set radius
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* value is ignored.
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*
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* @param ctx data context with variable values.
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* @param radius_var name of the variable to lookup for the radius value.
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* @param diameter_var name of the variable to lookup for the diameter value.
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* @return radius value of type Value::NUMBER or Value::UNDEFINED if both
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* variables are invalid or not set.
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*/
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Value PrimitiveModule::lookup_radius(const Context &ctx, const std::string &diameter_var, const std::string &radius_var) const
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{
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const Value d = ctx.lookup_variable(diameter_var, true);
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const Value r = ctx.lookup_variable(radius_var, true);
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const bool r_defined = (r.type() == Value::NUMBER);
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if (d.type() == Value::NUMBER) {
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if (r_defined) {
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PRINTB("WARNING: Ignoring radius variable '%s' as diameter '%s' is defined too.", radius_var % diameter_var);
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}
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return Value(d.toDouble() / 2.0);
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} else if (r_defined) {
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return r;
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} else {
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return Value();
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}
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}
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AbstractNode *PrimitiveModule::instantiate(const Context *ctx, const ModuleInstantiation *inst, const EvalContext *evalctx) const
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{
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PrimitiveNode *node = new PrimitiveNode(inst, this->type);
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node->center = false;
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node->x = node->y = node->z = node->h = node->r1 = node->r2 = 1;
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AssignmentList args;
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switch (this->type) {
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case CUBE:
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args += Assignment("size", NULL), Assignment("center", NULL);
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break;
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case SPHERE:
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args += Assignment("r", NULL);
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break;
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case CYLINDER:
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args += Assignment("h", NULL), Assignment("r1", NULL), Assignment("r2", NULL), Assignment("center", NULL);
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break;
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case POLYHEDRON:
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args += Assignment("points", NULL), Assignment("faces", NULL), Assignment("convexity", NULL);
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break;
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case SQUARE:
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args += Assignment("size", NULL), Assignment("center", NULL);
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break;
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case CIRCLE:
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args += Assignment("r", NULL);
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break;
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case POLYGON:
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args += Assignment("points", NULL), Assignment("paths", NULL), Assignment("convexity", NULL);
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break;
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default:
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assert(false && "PrimitiveModule::instantiate(): Unknown node type");
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}
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Context c(ctx);
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c.setVariables(args, evalctx);
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node->fn = c.lookup_variable("$fn").toDouble();
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node->fs = c.lookup_variable("$fs").toDouble();
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node->fa = c.lookup_variable("$fa").toDouble();
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if (node->fs < F_MINIMUM) {
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PRINTB("WARNING: $fs too small - clamping to %f", F_MINIMUM);
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node->fs = F_MINIMUM;
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}
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if (node->fa < F_MINIMUM) {
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PRINTB("WARNING: $fa too small - clamping to %f", F_MINIMUM);
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node->fa = F_MINIMUM;
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}
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if (type == CUBE) {
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Value size = c.lookup_variable("size");
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Value center = c.lookup_variable("center");
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size.getDouble(node->x);
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size.getDouble(node->y);
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size.getDouble(node->z);
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size.getVec3(node->x, node->y, node->z);
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if (center.type() == Value::BOOL) {
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node->center = center.toBool();
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}
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}
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if (type == SPHERE) {
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const Value r = lookup_radius(c, "d", "r");
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if (r.type() == Value::NUMBER) {
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node->r1 = r.toDouble();
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}
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}
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if (type == CYLINDER) {
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const Value h = c.lookup_variable("h");
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if (h.type() == Value::NUMBER) {
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node->h = h.toDouble();
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}
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const Value r = lookup_radius(c, "d", "r");
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const Value r1 = lookup_radius(c, "d1", "r1");
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const Value r2 = lookup_radius(c, "d2", "r2");
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if (r.type() == Value::NUMBER) {
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node->r1 = r.toDouble();
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node->r2 = r.toDouble();
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}
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if (r1.type() == Value::NUMBER) {
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node->r1 = r1.toDouble();
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}
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if (r2.type() == Value::NUMBER) {
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node->r2 = r2.toDouble();
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}
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const Value center = c.lookup_variable("center");
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if (center.type() == Value::BOOL) {
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node->center = center.toBool();
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}
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}
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if (type == POLYHEDRON) {
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node->points = c.lookup_variable("points");
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node->faces = c.lookup_variable("faces");
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if (node->faces.type() == Value::UNDEFINED) {
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// backwards compatable
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node->faces = c.lookup_variable("triangles");
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if (node->faces.type() != Value::UNDEFINED) {
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printDeprecation("DEPRECATED: polyhedron(triangles=[]) will be removed in future releases. Use polyhedron(faces=[]) instead.");
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}
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}
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}
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if (type == SQUARE) {
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Value size = c.lookup_variable("size");
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Value center = c.lookup_variable("center");
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size.getDouble(node->x);
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size.getDouble(node->y);
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size.getVec2(node->x, node->y);
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if (center.type() == Value::BOOL) {
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node->center = center.toBool();
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}
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}
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if (type == CIRCLE) {
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const Value r = lookup_radius(c, "d", "r");
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if (r.type() == Value::NUMBER) {
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node->r1 = r.toDouble();
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}
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}
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if (type == POLYGON) {
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node->points = c.lookup_variable("points");
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node->paths = c.lookup_variable("paths");
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}
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node->convexity = c.lookup_variable("convexity", true).toDouble();
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if (node->convexity < 1)
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node->convexity = 1;
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return node;
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}
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struct point2d {
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double x, y;
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};
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static void generate_circle(point2d *circle, double r, int fragments)
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{
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for (int i=0; i<fragments; i++) {
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double phi = (M_PI*2*i) / fragments;
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circle[i].x = r*cos(phi);
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circle[i].y = r*sin(phi);
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}
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}
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PolySet *PrimitiveNode::evaluate_polyset(class PolySetEvaluator *) const
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{
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PolySet *p = new PolySet();
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if (this->type == CUBE &&
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this->x > 0 && this->y > 0 && this->z > 0 &&
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!isinf(this->x) > 0 && !isinf(this->y) > 0 && !isinf(this->z) > 0) {
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double x1, x2, y1, y2, z1, z2;
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if (this->center) {
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x1 = -this->x/2;
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x2 = +this->x/2;
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y1 = -this->y/2;
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y2 = +this->y/2;
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z1 = -this->z/2;
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z2 = +this->z/2;
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} else {
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x1 = y1 = z1 = 0;
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x2 = this->x;
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y2 = this->y;
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z2 = this->z;
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}
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p->append_poly(); // top
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p->append_vertex(x1, y1, z2);
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p->append_vertex(x2, y1, z2);
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p->append_vertex(x2, y2, z2);
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p->append_vertex(x1, y2, z2);
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p->append_poly(); // bottom
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p->append_vertex(x1, y2, z1);
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p->append_vertex(x2, y2, z1);
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p->append_vertex(x2, y1, z1);
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p->append_vertex(x1, y1, z1);
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p->append_poly(); // side1
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p->append_vertex(x1, y1, z1);
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p->append_vertex(x2, y1, z1);
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p->append_vertex(x2, y1, z2);
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p->append_vertex(x1, y1, z2);
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p->append_poly(); // side2
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p->append_vertex(x2, y1, z1);
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p->append_vertex(x2, y2, z1);
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p->append_vertex(x2, y2, z2);
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p->append_vertex(x2, y1, z2);
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p->append_poly(); // side3
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p->append_vertex(x2, y2, z1);
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p->append_vertex(x1, y2, z1);
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p->append_vertex(x1, y2, z2);
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p->append_vertex(x2, y2, z2);
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p->append_poly(); // side4
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p->append_vertex(x1, y2, z1);
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p->append_vertex(x1, y1, z1);
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p->append_vertex(x1, y1, z2);
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p->append_vertex(x1, y2, z2);
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}
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if (this->type == SPHERE && this->r1 > 0 && !isinf(this->r1))
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{
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struct ring_s {
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point2d *points;
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double z;
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};
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int fragments = Calc::get_fragments_from_r(r1, fn, fs, fa);
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int rings = (fragments+1)/2;
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// Uncomment the following three lines to enable experimental sphere tesselation
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// if (rings % 2 == 0) rings++; // To ensure that the middle ring is at phi == 0 degrees
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ring_s *ring = new ring_s[rings];
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// double offset = 0.5 * ((fragments / 2) % 2);
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for (int i = 0; i < rings; i++) {
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// double phi = (M_PI * (i + offset)) / (fragments/2);
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double phi = (M_PI * (i + 0.5)) / rings;
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double r = r1 * sin(phi);
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ring[i].z = r1 * cos(phi);
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ring[i].points = new point2d[fragments];
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generate_circle(ring[i].points, r, fragments);
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}
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p->append_poly();
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for (int i = 0; i < fragments; i++)
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p->append_vertex(ring[0].points[i].x, ring[0].points[i].y, ring[0].z);
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for (int i = 0; i < rings-1; i++) {
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ring_s *r1 = &ring[i];
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ring_s *r2 = &ring[i+1];
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int r1i = 0, r2i = 0;
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while (r1i < fragments || r2i < fragments)
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{
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if (r1i >= fragments)
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goto sphere_next_r2;
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if (r2i >= fragments)
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goto sphere_next_r1;
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if ((double)r1i / fragments <
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(double)r2i / fragments)
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{
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sphere_next_r1:
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p->append_poly();
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int r1j = (r1i+1) % fragments;
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p->insert_vertex(r1->points[r1i].x, r1->points[r1i].y, r1->z);
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p->insert_vertex(r1->points[r1j].x, r1->points[r1j].y, r1->z);
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p->insert_vertex(r2->points[r2i % fragments].x, r2->points[r2i % fragments].y, r2->z);
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r1i++;
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} else {
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sphere_next_r2:
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p->append_poly();
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int r2j = (r2i+1) % fragments;
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p->append_vertex(r2->points[r2i].x, r2->points[r2i].y, r2->z);
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p->append_vertex(r2->points[r2j].x, r2->points[r2j].y, r2->z);
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p->append_vertex(r1->points[r1i % fragments].x, r1->points[r1i % fragments].y, r1->z);
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r2i++;
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}
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}
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}
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p->append_poly();
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for (int i = 0; i < fragments; i++)
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p->insert_vertex(ring[rings-1].points[i].x, ring[rings-1].points[i].y, ring[rings-1].z);
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delete[] ring;
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}
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if (this->type == CYLINDER &&
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this->h > 0 && !isinf(this->h) &&
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this->r1 >=0 && this->r2 >= 0 && (this->r1 + this->r2) > 0 &&
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!isinf(this->r1) && !isinf(this->r2)) {
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int fragments = Calc::get_fragments_from_r(fmax(this->r1, this->r2), this->fn, this->fs, this->fa);
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double z1, z2;
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if (this->center) {
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z1 = -this->h/2;
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z2 = +this->h/2;
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} else {
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z1 = 0;
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z2 = this->h;
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}
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point2d *circle1 = new point2d[fragments];
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point2d *circle2 = new point2d[fragments];
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generate_circle(circle1, r1, fragments);
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generate_circle(circle2, r2, fragments);
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for (int i=0; i<fragments; i++) {
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int j = (i+1) % fragments;
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if (r1 == r2) {
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p->append_poly();
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p->insert_vertex(circle1[i].x, circle1[i].y, z1);
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p->insert_vertex(circle2[i].x, circle2[i].y, z2);
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p->insert_vertex(circle2[j].x, circle2[j].y, z2);
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p->insert_vertex(circle1[j].x, circle1[j].y, z1);
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} else {
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if (r1 > 0) {
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p->append_poly();
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p->insert_vertex(circle1[i].x, circle1[i].y, z1);
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p->insert_vertex(circle2[i].x, circle2[i].y, z2);
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p->insert_vertex(circle1[j].x, circle1[j].y, z1);
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}
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if (r2 > 0) {
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p->append_poly();
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p->insert_vertex(circle2[i].x, circle2[i].y, z2);
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p->insert_vertex(circle2[j].x, circle2[j].y, z2);
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p->insert_vertex(circle1[j].x, circle1[j].y, z1);
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}
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}
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}
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if (this->r1 > 0) {
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p->append_poly();
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for (int i=0; i<fragments; i++)
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p->insert_vertex(circle1[i].x, circle1[i].y, z1);
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}
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if (this->r2 > 0) {
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p->append_poly();
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for (int i=0; i<fragments; i++)
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p->append_vertex(circle2[i].x, circle2[i].y, z2);
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}
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delete[] circle1;
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delete[] circle2;
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}
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if (this->type == POLYHEDRON)
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{
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p->convexity = this->convexity;
|
|
for (size_t i=0; i<this->faces.toVector().size(); i++)
|
|
{
|
|
p->append_poly();
|
|
const Value::VectorType &vec = this->faces.toVector()[i].toVector();
|
|
for (size_t j=0; j<vec.size(); j++) {
|
|
size_t pt = vec[j].toDouble();
|
|
if (pt < this->points.toVector().size()) {
|
|
double px, py, pz;
|
|
if (!this->points.toVector()[pt].getVec3(px, py, pz) ||
|
|
isinf(px) || isinf(py) || isinf(pz)) {
|
|
PRINTB("ERROR: Unable to convert point at index %d to a vec3 of numbers", j);
|
|
delete p;
|
|
return NULL;
|
|
}
|
|
p->insert_vertex(px, py, pz);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (this->type == SQUARE && x > 0 && y > 0)
|
|
{
|
|
double x1, x2, y1, y2;
|
|
if (this->center) {
|
|
x1 = -this->x/2;
|
|
x2 = +this->x/2;
|
|
y1 = -this->y/2;
|
|
y2 = +this->y/2;
|
|
} else {
|
|
x1 = y1 = 0;
|
|
x2 = this->x;
|
|
y2 = this->y;
|
|
}
|
|
|
|
p->is2d = true;
|
|
p->append_poly();
|
|
p->append_vertex(x1, y1);
|
|
p->append_vertex(x2, y1);
|
|
p->append_vertex(x2, y2);
|
|
p->append_vertex(x1, y2);
|
|
}
|
|
|
|
if (this->type == CIRCLE)
|
|
{
|
|
int fragments = Calc::get_fragments_from_r(this->r1, this->fn, this->fs, this->fa);
|
|
|
|
p->is2d = true;
|
|
p->append_poly();
|
|
|
|
for (int i=0; i < fragments; i++) {
|
|
double phi = (M_PI*2*i) / fragments;
|
|
p->append_vertex(this->r1*cos(phi), this->r1*sin(phi));
|
|
}
|
|
}
|
|
|
|
if (this->type == POLYGON)
|
|
{
|
|
DxfData dd;
|
|
|
|
for (size_t i=0; i<this->points.toVector().size(); i++) {
|
|
double x,y;
|
|
if (!this->points.toVector()[i].getVec2(x, y) ||
|
|
isinf(x) || isinf(y)) {
|
|
PRINTB("ERROR: Unable to convert point at index %d to a vec2 of numbers", i);
|
|
delete p;
|
|
return NULL;
|
|
}
|
|
dd.points.push_back(Vector2d(x, y));
|
|
}
|
|
|
|
if (this->paths.toVector().size() == 0)
|
|
{
|
|
if (dd.points.size() <= 2) { // Ignore malformed polygons
|
|
delete p;
|
|
return NULL;
|
|
}
|
|
dd.paths.push_back(DxfData::Path());
|
|
for (size_t i=0; i<dd.points.size(); i++) {
|
|
assert(i < dd.points.size()); // FIXME: Not needed, but this used to be an 'if'
|
|
dd.paths.back().indices.push_back(i);
|
|
}
|
|
if (dd.paths.back().indices.size() > 0) {
|
|
dd.paths.back().indices.push_back(dd.paths.back().indices.front());
|
|
dd.paths.back().is_closed = true;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
for (size_t i=0; i<this->paths.toVector().size(); i++)
|
|
{
|
|
dd.paths.push_back(DxfData::Path());
|
|
for (size_t j=0; j<this->paths.toVector()[i].toVector().size(); j++) {
|
|
unsigned int idx = this->paths.toVector()[i].toVector()[j].toDouble();
|
|
if (idx < dd.points.size()) {
|
|
dd.paths.back().indices.push_back(idx);
|
|
}
|
|
}
|
|
if (dd.paths.back().indices.empty()) {
|
|
dd.paths.pop_back();
|
|
} else {
|
|
dd.paths.back().indices.push_back(dd.paths.back().indices.front());
|
|
dd.paths.back().is_closed = true;
|
|
}
|
|
}
|
|
}
|
|
|
|
p->is2d = true;
|
|
p->convexity = convexity;
|
|
dxf_tesselate(p, dd, 0, Vector2d(1,1), true, false, 0);
|
|
dxf_border_to_ps(p, dd);
|
|
}
|
|
|
|
return p;
|
|
}
|
|
|
|
std::string PrimitiveNode::toString() const
|
|
{
|
|
std::stringstream stream;
|
|
|
|
stream << this->name();
|
|
|
|
switch (this->type) {
|
|
case CUBE:
|
|
stream << "(size = [" << this->x << ", " << this->y << ", " << this->z << "], "
|
|
<< "center = " << (center ? "true" : "false") << ")";
|
|
break;
|
|
case SPHERE:
|
|
stream << "($fn = " << this->fn << ", $fa = " << this->fa
|
|
<< ", $fs = " << this->fs << ", r = " << this->r1 << ")";
|
|
break;
|
|
case CYLINDER:
|
|
stream << "($fn = " << this->fn << ", $fa = " << this->fa
|
|
<< ", $fs = " << this->fs << ", h = " << this->h << ", r1 = " << this->r1
|
|
<< ", r2 = " << this->r2 << ", center = " << (center ? "true" : "false") << ")";
|
|
break;
|
|
case POLYHEDRON:
|
|
stream << "(points = " << this->points
|
|
<< ", faces = " << this->faces
|
|
<< ", convexity = " << this->convexity << ")";
|
|
break;
|
|
case SQUARE:
|
|
stream << "(size = [" << this->x << ", " << this->y << "], "
|
|
<< "center = " << (center ? "true" : "false") << ")";
|
|
break;
|
|
case CIRCLE:
|
|
stream << "($fn = " << this->fn << ", $fa = " << this->fa
|
|
<< ", $fs = " << this->fs << ", r = " << this->r1 << ")";
|
|
break;
|
|
case POLYGON:
|
|
stream << "(points = " << this->points << ", paths = " << this->paths << ", convexity = " << this->convexity << ")";
|
|
break;
|
|
default:
|
|
assert(false);
|
|
}
|
|
|
|
return stream.str();
|
|
}
|
|
|
|
void register_builtin_primitives()
|
|
{
|
|
Builtins::init("cube", new PrimitiveModule(CUBE));
|
|
Builtins::init("sphere", new PrimitiveModule(SPHERE));
|
|
Builtins::init("cylinder", new PrimitiveModule(CYLINDER));
|
|
Builtins::init("polyhedron", new PrimitiveModule(POLYHEDRON));
|
|
Builtins::init("square", new PrimitiveModule(SQUARE));
|
|
Builtins::init("circle", new PrimitiveModule(CIRCLE));
|
|
Builtins::init("polygon", new PrimitiveModule(POLYGON));
|
|
}
|