Introduce Godot Rust Script

native/Cargo.toml

@@ -1,3 +1,13 @@
+[workspace]
+resolver = "2"
+
+members = [
+  "scripts",
+]
+
+[workspace.dependencies]
+godot-rust-script = { git = "https://github.com/titannano/godot-rust-script", rev = "80b730c24e8488bc2e9c973c794006305d7d2c0d" }
+
 [package]
 name = "native"
 version = "0.4.0"
@@ -7,9 +17,14 @@ edition = "2021"
 crate-type = ["cdylib"]
 
 [dependencies]
-godot = { git = "https://github.com/godot-rust/gdext", rev = "b4e6fd6c9c23e0fd3a124c2893a9592c861ab780" }
+godot = { git = "https://github.com/titannano/gdext", rev = "a5d17342b7b47e8af652a6a733f497c468bbd59a" }
 lerp = "0.4.0"
 backtrace = "0.3.64"
 num = "0.4.0"
 rayon = "1.5.1"
 itertools = "0.10.3"
+godot-rust-script = { workspace = true, features = ["runtime"] }
+hot-lib-reloader = "0.6.5"
+scripts = { path = "./scripts" }
+lazy_static = "1.4.0"
+process_path = "0.1.4"

native/scripts/Cargo.toml

@@ -0,0 +1,12 @@
+[package]
+name = "scripts"
+version = "0.1.0"
+edition = "2021"
+
+[lib]
+crate-type = ["dylib", "rlib"]
+
+[dependencies]
+godot-rust-script = { workspace = true, features = ["scripts"] }
+backtrace = "0.3.64"
+num_enum = "0.7.1"

native/scripts/src/lib.rs

@@ -0,0 +1,5 @@
+mod particles;
+mod scene_object_registry;
+mod spawner;
+
+godot_rust_script::setup_library!();

native/scripts/src/particles/dust_particles.rs

@@ -0,0 +1,68 @@
+use godot_rust_script::{
+    godot::{
+        engine::{GpuParticles3D, PrimitiveMesh, StandardMaterial3D},
+        prelude::{godot_error, Gd},
+    },
+    godot_script_impl, GodotScript,
+};
+
+/// Dust Particle behavior for a particle system.
+/// This is used for the rotor effects
+#[derive(GodotScript, Debug)]
+#[script(base = GpuParticles3D)]
+struct DustParticles {
+    /// The strength of the emitted dust.
+    /// This is used for the rotor effects
+    /**
+     * This is more documentation
+     * please read it carefully
+     */
+    #[prop(get = Self::strength, set = Self::set_strength)]
+    #[export(range(min = 0.1, max = 1.5, step = 0.05))]
+    strength: f64,
+    base: Gd<GpuParticles3D>,
+}
+
+#[godot_script_impl]
+impl DustParticles {
+    pub fn _ready(&mut self) {
+        self.set_strength(0.0);
+    }
+
+    /// get effect strength
+    pub fn strength(&self) -> f64 {
+        self.strength
+    }
+
+    pub fn set_strength(&mut self, value: f64) {
+        self.strength = value;
+
+        let is_emitting = value > 0.0;
+
+        if self.base.is_emitting() != is_emitting {
+            self.base.set_emitting(is_emitting);
+        }
+
+        if !self.base.is_emitting() {
+            return;
+        }
+
+        let Some(mesh) = self.base.get_draw_pass_mesh(1) else {
+            godot_error!("Draw pass 1 does not exist!");
+            return;
+        };
+
+        let mesh: Gd<PrimitiveMesh> = mesh.cast();
+
+        let Some(material) = mesh.get_material() else {
+            godot_error!("mesh has no material!");
+            return;
+        };
+
+        let mut material: Gd<StandardMaterial3D> = material.cast();
+
+        let distance = (100.0 * (1.0 - value)).max(2.0);
+
+        material.set_proximity_fade_distance(distance as f32);
+    }
+}

native/scripts/src/particles/mod.rs

@@ -0,0 +1 @@
+mod dust_particles;