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fltk/test/unittest_complex_shapes.cxx

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//
// Unit tests for the Fast Light Tool Kit (FLTK).
//
// Copyright 1998-2022 by Bill Spitzak and others.
//
// This library is free software. Distribution and use rights are outlined in
// the file "COPYING" which should have been included with this file. If this
// file is missing or damaged, see the license at:
//
// https://www.fltk.org/COPYING.php
//
// Please see the following page on how to report bugs and issues:
//
// https://www.fltk.org/bugs.php
//
#include "unittests.h"
#include <config.h>
#include <FL/Fl_Box.H>
#include <FL/Fl_Hor_Value_Slider.H>
#include <FL/Fl_Dial.H>
#include <FL/Fl_Positioner.H>
#include <FL/fl_draw.H>
#if HAVE_GL
#include <FL/Fl_Gl_Window.H>
#endif
//
// --- test drawing circles and arcs ------
//
class Ut_Complex_Shapes_Test;
void draw_complex(Ut_Complex_Shapes_Test *p);
#if HAVE_GL
class Ut_GL_Complex_Shapes_Test : public Fl_Gl_Window {
public:
Ut_GL_Complex_Shapes_Test(int x, int y, int w, int h)
: Fl_Gl_Window(x, y, w, h) {
box(FL_FLAT_BOX);
end();
}
void draw() FL_OVERRIDE {
draw_begin();
Fl_Window::draw();
draw_complex((Ut_Complex_Shapes_Test*)parent());
draw_end();
}
};
#endif
class Ut_Native_Complex_Shapes_Test : public Fl_Window {
public:
Ut_Native_Complex_Shapes_Test(int x, int y, int w, int h)
: Fl_Window(x, y, w, h) {
box(FL_FLAT_BOX);
end();
}
void draw() FL_OVERRIDE {
Fl_Window::draw();
draw_complex((Ut_Complex_Shapes_Test*)parent());
}
};
//
//------- test the compelx shape drawing capabilities of this implementation ----------
//
class Ut_Complex_Shapes_Test : public Fl_Group {
Ut_Native_Complex_Shapes_Test* native_test_window;
#if HAVE_GL
Ut_GL_Complex_Shapes_Test* gl_test_window;
#endif
static void update_cb(Fl_Widget*, void *v) {
Ut_Complex_Shapes_Test* This = (Ut_Complex_Shapes_Test*)v;
This->native_test_window->redraw();
#if HAVE_GL
This->gl_test_window->redraw();
#endif
}
public:
Fl_Hor_Value_Slider* scale;
Fl_Dial* rotate;
Fl_Positioner* position;
void set_transformation() {
fl_translate(position->xvalue(), position->yvalue());
fl_rotate(-rotate->value());
fl_scale(scale->value(), scale->value());
}
static Fl_Widget* create() {
return new Ut_Complex_Shapes_Test(UT_TESTAREA_X, UT_TESTAREA_Y, UT_TESTAREA_W, UT_TESTAREA_H);
}
Ut_Complex_Shapes_Test(int x, int y, int w, int h) : Fl_Group(x, y, w, h) {
label("Testing complex shape drawing.");
align(FL_ALIGN_INSIDE|FL_ALIGN_BOTTOM|FL_ALIGN_LEFT|FL_ALIGN_WRAP);
box(FL_BORDER_BOX);
int a = x+16, b = y+34;
Fl_Box *t = new Fl_Box(a, b-24, 80, 18, "native");
t->align(FL_ALIGN_LEFT|FL_ALIGN_INSIDE);
native_test_window = new Ut_Native_Complex_Shapes_Test(a+23, b-1, 200, 200);
t = new Fl_Box(a, b, 18, 18, "1");
t->box(FL_ROUNDED_BOX); t->color(FL_YELLOW);
t->tooltip(// Title:
"Testing complex drawing with transformations.\n\n"
// Description:
"Draw a point pattern, an open line, a closed line, and a covenx polygon.\n\n"
// Things to look out for:
"Use the controls at the bottom right to scale, rotate, and move the patterns."
);
b+=44;
t = new Fl_Box(a, b, 18, 18, "2");
t->box(FL_ROUNDED_BOX); t->color(FL_YELLOW);
t->tooltip(// Title:
"Testing complex polygons.\n\n"
// Description:
"Draw polygons at different leves of complexity. "
"All polygons should be within the blue boundaries\n\n"
// Things to look out for:
"1: a convex polygon\n"
"2: a non-convex polygon\n"
"3: two polygons in a single operation\n"
"4: a polygon with a square hole in it"
);
b+=44;
t = new Fl_Box(a, b, 18, 18, "3");
t->box(FL_ROUNDED_BOX); t->color(FL_YELLOW);
t->tooltip(// Title:
"Testing complex polygons with arcs.\n\n"
// Description:
"Draw polygons with an arc section. "
"All polygons should be within the blue boundaries\n\n"
// Things to look out for:
"1: a polygon with a camel hump\n"
"2: a polygon with a camel dip"
);
#if HAVE_GL
a = x+16+250, b = y+34;
t = new Fl_Box(a, b-24, 80, 18, "OpenGL");
t->align(FL_ALIGN_LEFT|FL_ALIGN_INSIDE);
gl_test_window = new Ut_GL_Complex_Shapes_Test(a+31, b-1, 200, 200);
t = new Fl_Box(a, b, 26, 18, "1a");
t->box(FL_ROUNDED_BOX); t->color(FL_YELLOW);
t->tooltip(// Title:
"Testing complex drawing with transformations.\n\n"
// Description:
"Draw a point pattern, an open line, a closed line, and a convex polygon.\n\n"
// Things to look out for:
"Use the controls at the bottom right to scale, rotate, and move the patterns."
);
b+=44;
t = new Fl_Box(a, b, 28, 18, "2a");
t->box(FL_ROUNDED_BOX); t->color(FL_YELLOW);
t->tooltip(// Title:
"Testing complex polygons.\n\n"
// Description:
"Draw polygons at different leves of complexity. "
"All polygons should be within the blue boundaries\n\n"
// Things to look out for:
"1: a convex polygon\n"
"2: a non-convex polygon\n"
"3: two polygons in a single operation\n"
"4: a polygon with a square hole in it"
);
b+=44;
t = new Fl_Box(a, b, 28, 18, "3a");
t->box(FL_ROUNDED_BOX); t->color(FL_YELLOW);
t->tooltip(// Title:
"Testing complex polygons with arcs.\n\n"
// Description:
"Draw polygons with an arc section. "
"All polygons should be within the blue boundaries\n\n"
// Things to look out for:
"1: a polygon with a camel hump\n"
"2: a polygon with a camel dip"
);
#endif
a = UT_TESTAREA_X+UT_TESTAREA_W-250;
b = UT_TESTAREA_Y+UT_TESTAREA_H-50;
scale = new Fl_Hor_Value_Slider(a, b+10, 120, 20, "Scale:");
scale->align(FL_ALIGN_TOP_LEFT);
scale->range(0.8, 1.2);
scale->value(1.0);
scale->callback(update_cb, this);
rotate = new Fl_Dial(a+140, b, 40, 40, "Rotate:");
rotate->align(FL_ALIGN_TOP_LEFT);
rotate->angles(0, 360);
rotate->range(-180.0, 180.0);
rotate->value(0.0);
rotate->callback(update_cb, this);
position = new Fl_Positioner(a+200, b, 40, 40, "Offset:");
position->align(FL_ALIGN_TOP_LEFT);
position->xbounds(-10, 10);
position->ybounds(-10, 10);
position->value(0.0, 0.0);
position->callback(update_cb, this);
t = new Fl_Box(a-1, b-1, 1, 1);
resizable(t);
}
};
void convex_shape(int w, int h) {
fl_vertex(-w/2, -h);
fl_vertex(w/2, -h);
fl_vertex(w, 0);
fl_vertex(w, h);
fl_vertex(0, h);
fl_vertex(-w, h/2);
fl_vertex(-w, -h/2);
}
void complex_shape(int w, int h) {
fl_vertex(-w/2, -h);
fl_vertex(0, -h/2);
fl_vertex(w/2, -h);
fl_vertex(w, 0);
fl_vertex(w, h);
fl_vertex(0, h);
fl_vertex(-w, h/2);
fl_vertex(-w/2, 0);
fl_vertex(-w, -h/2);
}
void two_complex_shapes(int w, int h) {
fl_vertex(-w/2, -h);
fl_vertex(w/2, -h);
fl_vertex(w, 0);
fl_vertex(w, h-3);
fl_gap();
fl_vertex(w-3, h);
fl_vertex(0, h);
fl_vertex(-w, h/2);
fl_vertex(-w, -h/2);
}
void complex_shape_with_hole(int w, int h) {
int w2 = w/3, h2 = h/3;
// clockwise
fl_vertex(-w/2, -h);
fl_vertex(w/2, -h);
fl_vertex(w, 0);
fl_vertex(w, h);
fl_vertex(0, h);
fl_vertex(-w, h/2);
fl_vertex(-w, -h/2);
fl_gap();
// counterclockwise
fl_vertex(-w2, -h2);
fl_vertex(-w2, h2);
fl_vertex( w2, h2);
fl_vertex( w2, -h2);
}
void draw_complex(Ut_Complex_Shapes_Test *p) {
int a = 0, b = 0, dx = 20, dy = 20, w = 10, h = 10;
int w2 = w/3, h2 = h/3;
// ---- 1: draw a random shape
fl_color(FL_BLACK);
// -- points
fl_push_matrix();
fl_translate(a+dx, b+dy);
p->set_transformation();
fl_begin_points();
convex_shape(w, h);
fl_end_points();
fl_pop_matrix();
// -- lines
fl_push_matrix();
fl_translate(a+dx+50, b+dy);
p->set_transformation();
fl_begin_line();
convex_shape(w, h);
fl_end_line();
fl_pop_matrix();
// -- line loop
fl_push_matrix();
fl_translate(a+dx+100, b+dy);
p->set_transformation();
fl_begin_loop();
convex_shape(w, h);
fl_end_loop();
fl_pop_matrix();
// -- polygon
fl_push_matrix();
fl_translate(a+dx+150, b+dy);
p->set_transformation();
fl_begin_polygon();
convex_shape(w, h);
fl_end_polygon();
fl_pop_matrix();
// ---- 2: draw a complex shape
b += 44;
// -- covex polygon drawn in complex mode
fl_push_matrix();
fl_translate(a+dx, b+dy);
p->set_transformation();
fl_color(FL_DARK2);
fl_begin_complex_polygon();
convex_shape(w, h);
fl_end_complex_polygon();
fl_color(FL_BLUE);
fl_begin_loop();
convex_shape(w, h);
fl_end_loop();
fl_pop_matrix();
// -- non-convex polygon drawn in complex mode
fl_push_matrix();
fl_translate(a+dx+50, b+dy);
p->set_transformation();
fl_color(FL_DARK2);
fl_begin_complex_polygon();
complex_shape(w, h);
fl_end_complex_polygon();
fl_color(FL_BLUE);
fl_begin_loop();
complex_shape(w, h);
fl_end_loop();
fl_pop_matrix();
// -- two part polygon with gap
fl_push_matrix();
fl_translate(a+dx+100, b+dy);
p->set_transformation();
fl_color(FL_DARK2);
fl_begin_complex_polygon();
two_complex_shapes(w, h);
fl_end_complex_polygon();
fl_color(FL_BLUE);
fl_begin_loop();
fl_vertex(-w/2, -h);
fl_vertex(w/2, -h);
fl_vertex(w, 0);
fl_vertex(w, h-3);
fl_end_loop();
fl_begin_loop();
fl_vertex(w-3, h);
fl_vertex(0, h);
fl_vertex(-w, h/2);
fl_vertex(-w, -h/2);
fl_end_loop();
fl_pop_matrix();
// -- polygon with a hole
fl_push_matrix();
fl_translate(a+dx+150, b+dy);
p->set_transformation();
fl_color(FL_DARK2);
fl_begin_complex_polygon();
complex_shape_with_hole(w, h);
fl_end_complex_polygon();
fl_color(FL_BLUE);
fl_begin_loop();
fl_vertex(-w/2, -h);
fl_vertex(w/2, -h);
fl_vertex(w, 0);
fl_vertex(w, h);
fl_vertex(0, h);
fl_vertex(-w, h/2);
fl_vertex(-w, -h/2);
fl_end_loop();
fl_begin_loop();
fl_vertex(-w2, -h2);
fl_vertex(-w2, h2);
fl_vertex( w2, h2);
fl_vertex( w2, -h2);
fl_end_loop();
fl_pop_matrix();
// ---- 3: draw polygons with arcs
b += 44;
// -- a rectangle with a camel hump
fl_push_matrix();
fl_translate(a+dx, b+dy);
p->set_transformation();
fl_color(FL_DARK2);
fl_begin_complex_polygon();
fl_vertex(-w, 0); fl_arc(0, 0, w-3, 180.0, 0.0); fl_vertex(w, 0);
fl_vertex(w, h); fl_vertex(-w, h);
fl_end_complex_polygon();
fl_color(FL_BLUE);
fl_begin_loop();
fl_vertex(-w, 0); fl_arc(0, 0, w-3, 180.0, 0.0); fl_vertex(w, 0);
fl_vertex(w, h); fl_vertex(-w, h);
fl_end_loop();
fl_pop_matrix();
// -- a rectangle with a camel dip
fl_push_matrix();
fl_translate(a+dx+50, b+dy);
p->set_transformation();
fl_color(FL_DARK2);
fl_begin_complex_polygon();
fl_vertex(-w, 0); fl_arc(0, 0, w-3, 180.0, 360.0); fl_vertex(w, 0);
fl_vertex(w, h); fl_vertex(-w, h);
fl_end_complex_polygon();
fl_color(FL_BLUE);
fl_begin_loop();
fl_vertex(-w, 0); fl_arc(0, 0, w-3, 180.0, 360.0); fl_vertex(w, 0);
fl_vertex(w, h); fl_vertex(-w, h);
fl_end_loop();
fl_pop_matrix();
// -- a rectangle with a bezier curve top
fl_push_matrix();
fl_translate(a+dx+100, b+dy);
p->set_transformation();
fl_color(FL_DARK2);
fl_begin_complex_polygon();
fl_vertex(-w, 0);
fl_curve(-w+3, 0, 0, -h, 0, h, w-3, 0);
fl_vertex(w, 0);
fl_vertex(w, h); fl_vertex(-w, h);
fl_end_complex_polygon();
fl_color(FL_BLUE);
fl_begin_loop();
fl_vertex(-w, 0);
fl_curve(-w+3, 0, 0, -h, 0, h, w-3, 0);
fl_vertex(w, 0);
fl_vertex(w, h); fl_vertex(-w, h);
fl_end_loop();
fl_pop_matrix();
}
UnitTest complex_shapes(UT_TEST_COMPLEX_SHAPES, "Complex Shapes", Ut_Complex_Shapes_Test::create);
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