Now box 2d lets you move the box around with right and left mouse buttons.

master
Zed A. Shaw 7 months ago
parent 285cd4971f
commit 38c0fee65c
  1. 67
      sfmldemo/main.cpp
  2. 1
      sfmldemo/meson.build
  3. 1
      sfmldemo/reset_build.ps1
  4. 1
      sfmldemo/reset_build.sh
  5. 1
      sfmldemo/setup.ps1
  6. 18
      sfmldemo/setup.sh

@ -1,7 +1,7 @@
#include "imgui.h" #include "imgui.h"
#include "imgui-SFML.h" #include "imgui-SFML.h"
#include <fmt/core.h> #include <fmt/core.h>
#include <box2d/box2d.h>
#include <SFML/Graphics/CircleShape.hpp> #include <SFML/Graphics/CircleShape.hpp>
#include <SFML/Graphics/RenderWindow.hpp> #include <SFML/Graphics/RenderWindow.hpp>
#include <SFML/System.hpp> #include <SFML/System.hpp>
@ -35,22 +35,55 @@ void Window_update(sf::RenderWindow &window, sf::Shape &shape) {
window.display(); window.display();
} }
struct BoxTest {
b2Body *groundBody;
b2Body *body;
};
struct BoxTest Box2d_setup(b2World &world) {
b2BodyDef groundBodyDef;
groundBodyDef.position.Set(0.0f, -10.0f);
b2Body *groundBody = world.CreateBody(&groundBodyDef);
b2PolygonShape groundBox;
groundBox.SetAsBox(50.0f, 10.0f);
groundBody->CreateFixture(&groundBox, 0.0f);
b2BodyDef bodyDef;
bodyDef.type = b2_dynamicBody;
bodyDef.position.Set(3.0f, 4.0f);
b2Body *body = world.CreateBody(&bodyDef);
b2PolygonShape dynamicBox;
dynamicBox.SetAsBox(1.0f, 1.0f);
b2FixtureDef fixtureDef;
fixtureDef.shape = &dynamicBox;
fixtureDef.density = 1.0f;
fixtureDef.friction = 0.3f;
body->CreateFixture(&fixtureDef);
BoxTest box {groundBody, body};
return box;
}
int main() { int main() {
fmt::print("Setting up a window for you...\n"); fmt::print("Setting up a window for you...\n");
sf::ContextSettings settings; sf::ContextSettings settings;
settings.antialiasingLevel = 8; settings.antialiasingLevel = 8;
sf::RenderWindow window(sf::VideoMode(1920, 1080), "Simple Game Demo", sf::Style::Default, settings); sf::RenderWindow window(sf::VideoMode(720, 480), "Simple Game Demo", sf::Style::Default, settings);
// window.setFramerateLimit(60); // window.setFramerateLimit(60);
window.setVerticalSyncEnabled(true); window.setVerticalSyncEnabled(true);
ImGui_setup(window); ImGui_setup(window);
sf::CircleShape shape(100.f, 4); sf::CircleShape shape(50.f, 4);
sf::Vector2u size = window.getSize(); sf::Vector2u winSize = window.getSize();
shape.setPosition(size.x / 2, size.y / 2); shape.setPosition(winSize.x / 2, winSize.y / 2);
shape.setOrigin(100.f, 100.f); shape.setOrigin(50.f, 50.f);
shape.setFillColor(sf::Color(150, 50, 250)); shape.setFillColor(sf::Color(150, 50, 250));
shape.setOutlineThickness(10.f); shape.setOutlineThickness(10.f);
shape.setOutlineColor(sf::Color(250, 150, 100)); shape.setOutlineColor(sf::Color(250, 150, 100));
@ -69,6 +102,14 @@ int main() {
thread.launch(); thread.launch();
b2Vec2 gravity(0.0f, -10.0f);
b2World world(gravity);
BoxTest box = Box2d_setup(world);
float timeStep = 1.0f / 60.0f;
int velocityIterations = 6;
int positionIterations = 2;
while (window.isOpen()) { while (window.isOpen()) {
sf::Event event; sf::Event event;
@ -96,8 +137,11 @@ int main() {
break; break;
case sf::Event::MouseButtonPressed: case sf::Event::MouseButtonPressed:
if(sf::Mouse::isButtonPressed(sf::Mouse::Left)) { if(sf::Mouse::isButtonPressed(sf::Mouse::Left)) {
sf::Vector2i clickAt = sf::Mouse::getPosition(window); b2Vec2 force(-200, 1000);
shape.setPosition(clickAt.x, clickAt.y); box.body->ApplyForceToCenter(force, true);
} else if (sf::Mouse::isButtonPressed(sf::Mouse::Right)) {
b2Vec2 force(200, 1000);
box.body->ApplyForceToCenter(force, true);
} }
break; break;
} }
@ -110,8 +154,13 @@ int main() {
tick = since; tick = since;
} }
world.Step(timeStep, velocityIterations, positionIterations);
b2Vec2 position = box.body->GetPosition();
float angle = box.body->GetAngle();
shape.setPosition(position.x * 100.0f, winSize.y - position.y * 100.0f);
shape.setRotation(angle * 180.0f / M_PI);
shape.rotate(1);
ImGui_update(window, deltaClock, tick); ImGui_update(window, deltaClock, tick);
Window_update(window, shape); Window_update(window, shape);

@ -5,6 +5,7 @@ dependencies = [
dependency('sfml'), dependency('sfml'),
dependency('imgui-sfml'), dependency('imgui-sfml'),
dependency('fmt'), dependency('fmt'),
dependency('box2d'),
] ]
executable('sfmldemo', 'main.cpp', executable('sfmldemo', 'main.cpp',

@ -14,4 +14,5 @@ meson wrap install sfml
meson wrap install vorbis meson wrap install vorbis
meson wrap install zlib meson wrap install zlib
meson wrap install fmt meson wrap install fmt
meson wrap install box2d
meson setup -Ddefault_library=static builddir meson setup -Ddefault_library=static builddir

@ -17,4 +17,5 @@ meson wrap install sfml
meson wrap install vorbis meson wrap install vorbis
meson wrap install zlib meson wrap install zlib
meson wrap install fmt meson wrap install fmt
meson wrap install box2d
meson setup builddir meson setup builddir

@ -10,4 +10,5 @@ meson wrap install openal-soft
meson wrap install sfml meson wrap install sfml
meson wrap install vorbis meson wrap install vorbis
meson wrap install zlib meson wrap install zlib
meson wrap install box2d
meson setup -Ddefault_library=static builddir meson setup -Ddefault_library=static builddir

@ -0,0 +1,18 @@
#!/usr/bin/env bash
set -ex
mkdir subprojects
mkdir builddir
meson wrap install flac
meson wrap install freetype2
meson wrap install imgui-sfml
meson wrap install imgui
meson wrap install libpng
meson wrap install ogg
meson wrap install openal-soft
meson wrap install sfml
meson wrap install vorbis
meson wrap install zlib
meson wrap install fmt
meson wrap install box2d
meson setup builddir
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