From 0a9a94ccc6bf57c123cd428d492b51584e391919 Mon Sep 17 00:00:00 2001
From: Dmitry Stepanov <d1maxa@yandex.ru>
Date: Wed, 2 Mar 2022 17:58:11 +0300
Subject: [PATCH] experimental game executor

- allows you to run game plugins
---
 .gitignore           |  2 +-
 .idea/rg3d-core.iml  |  1 +
 Cargo.toml           |  3 +-
 executor/Cargo.toml  |  8 ++++
 executor/src/main.rs | 89 ++++++++++++++++++++++++++++++++++++++++++++
 5 files changed, 101 insertions(+), 2 deletions(-)
 create mode 100644 executor/Cargo.toml
 create mode 100644 executor/src/main.rs

diff --git a/.gitignore b/.gitignore
index ffb67156a..29bb5f08d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,7 +2,7 @@
 **/*.rs.bk
 /cloc
 *.lock
-/*.log
+*.log
 /*.png
 /examples/data/lightmaps
 /save.bin
diff --git a/.idea/rg3d-core.iml b/.idea/rg3d-core.iml
index 027eb2fc7..22a81a5fa 100644
--- a/.idea/rg3d-core.iml
+++ b/.idea/rg3d-core.iml
@@ -27,6 +27,7 @@
       <sourceFolder url="file://$MODULE_DIR$/fyrox-sound/src" isTestSource="false" />
       <sourceFolder url="file://$MODULE_DIR$/fyrox-ui/src" isTestSource="false" />
       <sourceFolder url="file://$MODULE_DIR$/examples/scripting/src" isTestSource="false" />
+      <sourceFolder url="file://$MODULE_DIR$/executor/src" isTestSource="false" />
       <excludeFolder url="file://$MODULE_DIR$/target" />
       <excludeFolder url="file://$MODULE_DIR$/examples/wasm/target" />
     </content>
diff --git a/Cargo.toml b/Cargo.toml
index a9e61434e..9445668e0 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -24,7 +24,8 @@ members = [
     "fyrox-resource",
     "examples/wasm",
     "examples/scripting",
-	"editor"
+	"editor",
+    "executor"
 ]
 
 [profile.dev]
diff --git a/executor/Cargo.toml b/executor/Cargo.toml
new file mode 100644
index 000000000..d9788263c
--- /dev/null
+++ b/executor/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+name = "executor"
+version = "0.1.0"
+edition = "2021"
+description = "Game plugin runner for Fyrox game engine"
+
+[dependencies]
+fyrox = { path = "../" }
\ No newline at end of file
diff --git a/executor/src/main.rs b/executor/src/main.rs
new file mode 100644
index 000000000..bf1419a11
--- /dev/null
+++ b/executor/src/main.rs
@@ -0,0 +1,89 @@
+use fyrox::{
+    core::instant::Instant,
+    engine::{resource_manager::ResourceManager, Engine, EngineInitParams, SerializationContext},
+    event::{Event, WindowEvent},
+    event_loop::{ControlFlow, EventLoop},
+    utils::{
+        log::{Log, MessageKind},
+        translate_event,
+    },
+};
+use std::sync::Arc;
+
+fn main() {
+    let event_loop = EventLoop::new();
+
+    let window_builder = fyrox::window::WindowBuilder::new()
+        .with_title("Fyrox Game Executor")
+        .with_resizable(true);
+
+    let serialization_context = Arc::new(SerializationContext::new());
+    let mut engine = Engine::new(EngineInitParams {
+        window_builder,
+        resource_manager: ResourceManager::new(serialization_context.clone()),
+        serialization_context,
+        events_loop: &event_loop,
+        vsync: true,
+    })
+    .unwrap();
+
+    engine.load_plugins();
+
+    let clock = Instant::now();
+    let fixed_timestep = 1.0 / 60.0;
+    let mut elapsed_time = 0.0;
+
+    event_loop.run(move |event, _, control_flow| {
+        let scenes = engine
+            .scenes
+            .pair_iter()
+            .map(|(s, _)| s)
+            .collect::<Vec<_>>();
+
+        for &scene_handle in scenes.iter() {
+            engine.handle_os_event_by_scripts(&event, scene_handle, fixed_timestep);
+        }
+
+        match event {
+            Event::MainEventsCleared => {
+                let mut dt = clock.elapsed().as_secs_f32() - elapsed_time;
+                while dt >= fixed_timestep {
+                    dt -= fixed_timestep;
+                    elapsed_time += fixed_timestep;
+
+                    for &scene_handle in scenes.iter() {
+                        engine.update_scene_scripts(scene_handle, fixed_timestep);
+                    }
+
+                    engine.update(fixed_timestep);
+                }
+
+                while let Some(_ui_event) = engine.user_interface.poll_message() {}
+
+                engine.get_window().request_redraw();
+            }
+            Event::RedrawRequested(_) => {
+                engine.render().unwrap();
+            }
+            Event::WindowEvent { event, .. } => {
+                match event {
+                    WindowEvent::CloseRequested => *control_flow = ControlFlow::Exit,
+                    WindowEvent::Resized(size) => {
+                        if let Err(e) = engine.set_frame_size(size.into()) {
+                            Log::writeln(
+                                MessageKind::Error,
+                                format!("Unable to set frame size: {:?}", e),
+                            );
+                        }
+                    }
+                    _ => (),
+                }
+
+                if let Some(os_event) = translate_event(&event) {
+                    engine.user_interface.process_os_event(&os_event);
+                }
+            }
+            _ => *control_flow = ControlFlow::Poll,
+        }
+    });
+}