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Demos: Move to Userland/Demos/
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Andreas Kling
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ececac65c2
commit
7fc079bd86
23 changed files with 1 additions and 1 deletions
230
Userland/Demos/Cube/Cube.cpp
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230
Userland/Demos/Cube/Cube.cpp
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/*
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* Copyright (c) 2020, Stephan Unverwerth <s.unverwerth@gmx.de>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <LibCore/ElapsedTimer.h>
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#include <LibGUI/Application.h>
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#include <LibGUI/Icon.h>
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#include <LibGUI/Label.h>
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#include <LibGUI/Painter.h>
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#include <LibGUI/Widget.h>
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#include <LibGUI/Window.h>
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#include <LibGfx/Bitmap.h>
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#include <LibGfx/Matrix4x4.h>
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#include <LibGfx/Vector3.h>
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#include <math.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <time.h>
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const int WIDTH = 200;
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const int HEIGHT = 200;
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class Cube final : public GUI::Widget {
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C_OBJECT(Cube)
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public:
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virtual ~Cube() override;
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void set_stat_label(RefPtr<GUI::Label> l) { m_stats = l; };
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private:
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Cube();
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RefPtr<Gfx::Bitmap> m_bitmap;
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RefPtr<GUI::Label> m_stats;
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virtual void paint_event(GUI::PaintEvent&) override;
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virtual void timer_event(Core::TimerEvent&) override;
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int m_accumulated_time;
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int m_cycles;
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int m_phase;
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};
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Cube::Cube()
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{
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m_bitmap = Gfx::Bitmap::create(Gfx::BitmapFormat::RGB32, { WIDTH, HEIGHT });
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m_accumulated_time = 0;
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m_cycles = 0;
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m_phase = 0;
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stop_timer();
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start_timer(20);
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}
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Cube::~Cube()
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{
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}
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void Cube::paint_event(GUI::PaintEvent& event)
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{
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GUI::Painter painter(*this);
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painter.add_clip_rect(event.rect());
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/* Blit it! */
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painter.draw_scaled_bitmap(event.rect(), *m_bitmap, m_bitmap->rect());
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}
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void Cube::timer_event(Core::TimerEvent&)
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{
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Core::ElapsedTimer timer;
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timer.start();
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const FloatVector3 vertices[8] {
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{ -1, -1, -1 },
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{ -1, 1, -1 },
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{ 1, 1, -1 },
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{ 1, -1, -1 },
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{ -1, -1, 1 },
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{ -1, 1, 1 },
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{ 1, 1, 1 },
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{ 1, -1, 1 },
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};
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#define QUAD(a, b, c, d) a, b, c, c, d, a
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const int indices[] {
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QUAD(0, 1, 2, 3),
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QUAD(7, 6, 5, 4),
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QUAD(4, 5, 1, 0),
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QUAD(3, 2, 6, 7),
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QUAD(1, 5, 6, 2),
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QUAD(0, 3, 7, 4),
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};
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const Color colors[] {
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Color::Red,
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Color::Red,
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Color::Green,
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Color::Green,
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Color::Blue,
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Color::Blue,
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Color::Magenta,
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Color::Magenta,
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Color::White,
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Color::White,
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Color::Yellow,
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Color::Yellow,
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};
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FloatVector3 transformed_vertices[8];
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static float angle = 0;
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angle += 0.02f;
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auto matrix = FloatMatrix4x4::translate(FloatVector3(0, 0, 1.5f))
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* FloatMatrix4x4::rotate(FloatVector3(1, 0, 0), angle * 1.17356641f)
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* FloatMatrix4x4::rotate(FloatVector3(0, 1, 0), angle * 0.90533273f)
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* FloatMatrix4x4::rotate(FloatVector3(0, 0, 1), angle);
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for (int i = 0; i < 8; i++) {
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transformed_vertices[i] = matrix.transform_point(vertices[i]);
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}
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GUI::Painter painter(*m_bitmap);
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painter.fill_rect_with_gradient(Gfx::Orientation::Vertical, m_bitmap->rect(), Gfx::Color::White, Gfx::Color::Blue);
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auto to_point = [](const FloatVector3& v) {
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return Gfx::IntPoint(v.x(), v.y());
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};
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for (size_t i = 0; i < sizeof(indices) / sizeof(indices[0]) / 3; i++) {
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auto a = transformed_vertices[indices[i * 3]];
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auto b = transformed_vertices[indices[i * 3 + 1]];
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auto c = transformed_vertices[indices[i * 3 + 2]];
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auto normal = (b - a).cross(c - a);
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normal.normalize();
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// Perspective projection
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a.set_x(WIDTH / 2 + a.x() / (1 + a.z() * 0.35) * WIDTH / 3);
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a.set_y(HEIGHT / 2 - a.y() / (1 + a.z() * 0.35) * WIDTH / 3);
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b.set_x(WIDTH / 2 + b.x() / (1 + b.z() * 0.35) * WIDTH / 3);
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b.set_y(HEIGHT / 2 - b.y() / (1 + b.z() * 0.35) * WIDTH / 3);
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c.set_x(WIDTH / 2 + c.x() / (1 + c.z() * 0.35) * WIDTH / 3);
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c.set_y(HEIGHT / 2 - c.y() / (1 + c.z() * 0.35) * WIDTH / 3);
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float winding = (b.x() - a.x()) * (c.y() - a.y()) - (b.y() - a.y()) * (c.x() - a.x());
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if (winding < 0)
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continue;
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float shade = 0.5f + normal.y() * 0.5f;
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auto color = colors[i];
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color.set_red(color.red() * shade);
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color.set_green(color.green() * shade);
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color.set_blue(color.blue() * shade);
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painter.draw_triangle(to_point(a), to_point(b), to_point(c), color);
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}
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if ((m_cycles % 50) == 0) {
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dbgln("{} total cycles. finished 50 in {} ms, avg {} ms", m_cycles, m_accumulated_time, m_accumulated_time / 50);
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m_stats->set_text(String::formatted("{} ms", m_accumulated_time / 50));
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m_accumulated_time = 0;
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}
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update();
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m_accumulated_time += timer.elapsed();
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m_cycles++;
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}
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int main(int argc, char** argv)
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{
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auto app = GUI::Application::construct(argc, argv);
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if (pledge("stdio rpath shared_buffer", nullptr) < 0) {
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perror("pledge");
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return 1;
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}
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if (unveil("/res", "r") < 0) {
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perror("unveil");
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return 1;
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}
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if (unveil(nullptr, nullptr) < 0) {
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perror("unveil");
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return 1;
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}
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auto window = GUI::Window::construct();
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window->set_double_buffering_enabled(true);
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window->set_title("Cube");
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window->set_resizable(false);
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window->resize(WIDTH, HEIGHT);
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auto& cube = window->set_main_widget<Cube>();
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auto& time = cube.add<GUI::Label>();
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time.set_relative_rect({ 0, 4, 40, 10 });
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time.move_by({ window->width() - time.width(), 0 });
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cube.set_stat_label(time);
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window->show();
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auto app_icon = GUI::Icon::default_icon("app-cube");
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window->set_icon(app_icon.bitmap_for_size(16));
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return app->exec();
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}
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