mirror of https://github.com/vitalif/openscad
122 lines
3.2 KiB
C++
122 lines
3.2 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 <math.h>
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#include <iostream>
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#include <algorithm>
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#include "Polygon2d.h"
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#include "DrawingCallback.h"
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DrawingCallback::DrawingCallback(unsigned long fn) : fn(fn),
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pen(Vector2d(0, 0)), offset(Vector2d(0, 0)), advance(Vector2d(0, 0))
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{
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}
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DrawingCallback::~DrawingCallback()
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{
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}
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void DrawingCallback::start_glyph()
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{
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this->polygon = new Polygon2d();
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this->polygon->setSanitized(true);
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}
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void DrawingCallback::finish_glyph()
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{
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if (this->outline.vertices.size() > 0) {
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this->polygon->addOutline(this->outline);
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this->outline.vertices.clear();
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}
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if (this->polygon->outlines().size() == 0) {
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delete this->polygon;
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this->polygon = NULL;
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}
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if (this->polygon) this->polygons.push_back(this->polygon);
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}
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std::vector<const Geometry *> DrawingCallback::get_result()
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{
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return this->polygons;
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}
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void DrawingCallback::set_glyph_offset(double offset_x, double offset_y)
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{
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offset = Vector2d(offset_x, offset_y);
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}
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void DrawingCallback::add_glyph_advance(double advance_x, double advance_y)
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{
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advance += Vector2d(advance_x, advance_y);
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}
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void DrawingCallback::add_vertex(Vector2d v)
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{
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this->outline.vertices.push_back(v + offset + advance);
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}
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void DrawingCallback::move_to(Vector2d to)
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{
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if (this->outline.vertices.size() > 0) {
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this->polygon->addOutline(this->outline);
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this->outline.vertices.clear();
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}
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add_vertex(to);
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pen = to;
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}
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void DrawingCallback::line_to(Vector2d to)
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{
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add_vertex(to);
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pen = to;
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}
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// Quadric Bezier curve
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void DrawingCallback::curve_to(Vector2d c1, Vector2d to)
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{
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for (unsigned long idx = 1;idx <= fn;idx++) {
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const double a = idx * (1.0 / (double)fn);
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add_vertex(pen * pow(1-a, 2) +
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c1 * 2 * pow(1-a, 1) * a +
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to * pow(a, 2));
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}
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pen = to;
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}
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// Cubic Bezier curve
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void DrawingCallback::curve_to(Vector2d c1, Vector2d c2, Vector2d to)
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{
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for (unsigned long idx = 1;idx <= fn;idx++) {
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const double a = idx * (1.0 / (double)fn);
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add_vertex(pen * pow(1-a, 3) +
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c1 * 3 * pow(1-a, 2) * a +
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c2 * 3 * pow(1-a, 1) * pow(a, 2) +
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to * pow(a, 3));
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}
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pen = to;
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}
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