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Diffstat (limited to 'src/3rdparty/2geom/src/toys/rect-toy.cpp')
| -rw-r--r-- | src/3rdparty/2geom/src/toys/rect-toy.cpp | 395 |
1 files changed, 395 insertions, 0 deletions
diff --git a/src/3rdparty/2geom/src/toys/rect-toy.cpp b/src/3rdparty/2geom/src/toys/rect-toy.cpp new file mode 100644 index 0000000..929afb7 --- /dev/null +++ b/src/3rdparty/2geom/src/toys/rect-toy.cpp @@ -0,0 +1,395 @@ +/* + * Rect Toy + * + * Copyright 2008 njh <> + * multitoy approach + * Copyright 2008 Marco <> + * + * This library is free software; you can redistribute it and/or + * modify it either under the terms of the GNU Lesser General Public + * License version 2.1 as published by the Free Software Foundation + * (the "LGPL") or, at your option, under the terms of the Mozilla + * Public License Version 1.1 (the "MPL"). If you do not alter this + * notice, a recipient may use your version of this file under either + * the MPL or the LGPL. + * + * You should have received a copy of the LGPL along with this library + * in the file COPYING-LGPL-2.1; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * You should have received a copy of the MPL along with this library + * in the file COPYING-MPL-1.1 + * + * The contents of this file are subject to the Mozilla Public License + * Version 1.1 (the "License"); you may not use this file except in + * compliance with the License. You may obtain a copy of the License at + * http://www.mozilla.org/MPL/ + * + * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY + * OF ANY KIND, either express or implied. See the LGPL or the MPL for + * the specific language governing rights and limitations. + */ + + +#include <2geom/line.h> +#include <toys/path-cairo.h> +#include <toys/toy-framework-2.h> +#include <2geom/transforms.h> + +#include <2geom/angle.h> + +#include <vector> +#include <string> +#include <optional> + +using namespace Geom; + + + +std::string angle_formatter(double angle) +{ + return default_formatter(decimal_round(deg_from_rad(angle),2)); +} + +class LineToy : public Toy +{ + enum menu_item_t + { + SHOW_MENU = 0, + TEST_CREATE, + TEST_PROJECTION, + TEST_ORTHO, + TEST_DISTANCE, + TEST_POSITION, + TEST_SEG_BISEC, + TEST_ANGLE_BISEC, + TEST_COLLINEAR, + TEST_INTERSECTIONS, + TOTAL_ITEMS // this one must be the last item + }; + + enum handle_label_t + { + }; + + enum toggle_label_t + { + }; + + enum slider_label_t + { + ANGLE_SLIDER = 0, + }; + + static const char* menu_items[TOTAL_ITEMS]; + static const char keys[TOTAL_ITEMS]; + + void first_time(int /*argc*/, char** /*argv*/) override + { + draw_f = &LineToy::draw_menu; + } + + void init_common() + { + set_common_control_geometry = true; + set_control_geometry = true; + + sliders.clear(); + toggles.clear(); + handles.clear(); + } + + + virtual void draw_common( cairo_t *cr, std::ostringstream *notify, + int width, int height, bool /*save*/ ) + { + init_common_ctrl_geom(cr, width, height, notify); + } + + + void init_create() + { + init_common(); + + p1.pos = Point(400, 50); + p2.pos = Point(450, 450); + + sliders.emplace_back(0, 2*M_PI, 0, 0, "angle"); + sliders[ANGLE_SLIDER].formatter(&angle_formatter); + + handles.push_back(&p1); + handles.push_back(&p2); + handles.push_back(&(sliders[ANGLE_SLIDER])); + } + + void draw_create(cairo_t *cr, std::ostringstream *notify, + int width, int height, bool save, std::ostringstream */*timer_stream*/) + { + draw_common(cr, notify, width, height, save); + init_create_ctrl_geom(cr, notify, width, height); + + Rect r1(p1.pos, p2.pos); + + cairo_set_source_rgba(cr, 0.0, 0.0, 0.0, 1.0); + cairo_set_line_width(cr, 0.3); + cairo_rectangle(cr, r1); + + Affine rot = Translate(-r1.midpoint())*Rotate(sliders[ANGLE_SLIDER].value())*Translate(r1.midpoint()); + cairo_rectangle(cr, r1*rot); + cairo_move_to(cr, r1.corner(3)*rot); + for(int i = 0; i < 4; i++) { + cairo_line_to(cr, r1.corner(i)*rot); + } + + cairo_stroke(cr); + + draw_label(cr, p1, "P1"); + draw_label(cr, p2, "P2"); + } + + + + void init_intersections() + { + init_common(); + p1.pos = Point(400, 50); + p2.pos = Point(450, 450); + p3.pos = Point(100, 250); + p4.pos = Point(200, 450); + p5.pos = Point(50, 150); + p6.pos = Point(480, 60); + + handles.push_back(&p1); + handles.push_back(&p2); + handles.push_back(&p3); + handles.push_back(&p4); + handles.push_back(&p5); + handles.push_back(&p6); + } + + void draw_intersections(cairo_t *cr, std::ostringstream *notify, + int width, int height, bool save, + std::ostringstream */*timer_stream*/) + { + draw_common(cr, notify, width, height, save); + + Rect r1(p1.pos, p2.pos); + Rect r2(p3.pos, p4.pos); + Line l1(p5.pos, p6.pos); + + cairo_set_source_rgba(cr, 0.0, 0.0, 0.0, 1.0); + cairo_set_line_width(cr, 0.3); + cairo_rectangle(cr, r1); + cairo_stroke(cr); + + cairo_set_source_rgba(cr, 0.0, 0.3, 0.0, 1.0); + cairo_rectangle(cr, r2); + cairo_stroke(cr); + + OptRect r1xr2 = intersect(r1, r2); + if(r1xr2) { + cairo_set_source_rgba(cr, 1.0, 0.7, 0.7, 1.0); + cairo_rectangle(cr, *r1xr2); + cairo_fill(cr); + } + + cairo_set_source_rgba(cr, 0.2, 0.2, 0.2, 1.0); + cairo_set_line_width(cr, 0.3); + draw_line(cr, l1); + cairo_stroke(cr); + + + std::optional<LineSegment> ls = rect_line_intersect(r1, LineSegment(p5.pos, p6.pos)); + *notify << "intersects: " << ((ls)?"true":"false") << std::endl; + if(ls) { + draw_handle(cr, (*ls)[0]); + draw_handle(cr, (*ls)[1]); + cairo_save(cr); + cairo_set_line_width(cr, 2); + cairo_move_to(cr, (*ls)[0]); + cairo_line_to(cr, (*ls)[1]); + cairo_stroke(cr); + cairo_restore(cr); + } + + + } + + void init_common_ctrl_geom(cairo_t* /*cr*/, int /*width*/, int /*height*/, std::ostringstream* /*notify*/) + { + if ( set_common_control_geometry ) + { + set_common_control_geometry = false; + } + } + + void init_create_ctrl_geom(cairo_t* /*cr*/, std::ostringstream* /*notify*/, int /*width*/, int height) + { + if ( set_control_geometry ) + { + set_control_geometry = false; + + sliders[ANGLE_SLIDER].geometry(Point(50, height - 50), 180); + } + } + + + + void draw_segment(cairo_t* cr, Point const& p1, Point const& p2) + { + cairo_move_to(cr, p1); + cairo_line_to(cr, p2); + } + + void draw_segment(cairo_t* cr, Point const& p1, double angle, double length) + { + Point p2; + p2[X] = length * std::cos(angle); + p2[Y] = length * std::sin(angle); + p2 += p1; + draw_segment(cr, p1, p2); + } + + void draw_segment(cairo_t* cr, LineSegment const& ls) + { + draw_segment(cr, ls[0], ls[1]); + } + + void draw_ray(cairo_t* cr, Ray const& r) + { + double angle = r.angle(); + draw_segment(cr, r.origin(), angle, m_length); + } + + void draw_line(cairo_t* cr, Line const& l) + { + double angle = l.angle(); + draw_segment(cr, l.origin(), angle, m_length); + draw_segment(cr, l.origin(), angle, -m_length); + } + + void draw_label(cairo_t* cr, PointHandle const& ph, const char* label) + { + draw_text(cr, ph.pos+op, label); + } + + void draw_label(cairo_t* cr, Line const& l, const char* label) + { + draw_text(cr, projection(Point(m_width/2-30, m_height/2-30), l)+op, label); + } + + void draw_label(cairo_t* cr, LineSegment const& ls, const char* label) + { + draw_text(cr, middle_point(ls[0], ls[1])+op, label); + } + + void draw_label(cairo_t* cr, Ray const& r, const char* label) + { + Point prj = r.pointAt(r.nearestTime(Point(m_width/2-30, m_height/2-30))); + if (L2(r.origin() - prj) < 100) + { + prj = r.origin() + 100*r.vector(); + } + draw_text(cr, prj+op, label); + } + + void init_menu() + { + handles.clear(); + sliders.clear(); + toggles.clear(); + } + + void draw_menu( cairo_t * /*cr*/, std::ostringstream *notify, + int /*width*/, int /*height*/, bool /*save*/, + std::ostringstream */*timer_stream*/) + { + *notify << std::endl; + for (int i = SHOW_MENU; i < TOTAL_ITEMS; ++i) + { + *notify << " " << keys[i] << " - " << menu_items[i] << std::endl; + } + } + + void key_hit(GdkEventKey *e) override + { + char choice = std::toupper(e->keyval); + switch ( choice ) + { + case 'A': + init_menu(); + draw_f = &LineToy::draw_menu; + break; + case 'B': + init_create(); + draw_f = &LineToy::draw_create; + break; + case 'C': + init_intersections(); + draw_f = &LineToy::draw_intersections; + break; + } + redraw(); + } + + void draw( cairo_t *cr, std::ostringstream *notify, + int width, int height, bool save, std::ostringstream *timer_stream) override + { + m_width = width; + m_height = height; + m_length = (m_width > m_height) ? m_width : m_height; + m_length *= 2; + (this->*draw_f)(cr, notify, width, height, save, timer_stream); + Toy::draw(cr, notify, width, height, save, timer_stream); + } + + public: + LineToy() + { + op = Point(5,5); + } + + private: + typedef void (LineToy::* draw_func_t) (cairo_t*, std::ostringstream*, int, int, bool, std::ostringstream*); + draw_func_t draw_f; + bool set_common_control_geometry; + bool set_control_geometry; + PointHandle p1, p2, p3, p4, p5, p6, O; + std::vector<Toggle> toggles; + std::vector<Slider> sliders; + Point op; + double m_width, m_height, m_length; + +}; // end class LineToy + + +const char* LineToy::menu_items[] = +{ + "show this menu", + "rect generation", + "intersection with a line" +}; + +const char LineToy::keys[] = +{ + 'A', 'B', 'C' +}; + + + +int main(int argc, char **argv) +{ + init( argc, argv, new LineToy()); + return 0; +} + + +/* + Local Variables: + mode:c++ + c-file-style:"stroustrup" + c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +)) + indent-tabs-mode:nil + fill-column:99 + End: +*/ +// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 : |