Merge branch 'BasicDie'

1 files changed, 331 insertions, 0 deletions

diff --git a/rust/src/basic_die.rs b/rust/src/basic_die.rs
new file mode 100644
index 0000000..9dab3ce
--- /dev/null
+++ b/rust/src/basic_die.rs
@@ -0,0 +1,331 @@
+use std::borrow::Borrow;
+use gdnative::api::*;
+use gdnative::prelude::*;
+
+/// the input state for the player
+enum InputState {
+    Default,
+    Shooting,
+    Moving
+}
+
+/// the basic die used by the player
+#[derive(NativeClass)]
+#[inherit(RigidBody)]
+#[register_with(Self::register_builder)]
+pub struct BasicDie {
+    #[property(path="camera/camera_clamp")]
+    camera_clamp: Vector2,
+    #[property(path="shooting/max_force")]
+    max_force: f32,
+    #[property(path="shooting/up_angle")]
+    up_angle: f32,
+    #[property(path="shooting/stopping_velocity")]
+    stopping_velocity: f32,
+    #[property(path="input/camera_mouse_sensitivity")]
+    mouse_sensitivity: Vector2,
+    #[property(path="input/shoot_sensitivity")]
+    shoot_sensitivity: f32,
+
+    input_state: InputState,
+    current_force: f32,
+
+    action_shooting: String,
+
+    node_camera_arm_horizontal: Option<Ref<Spatial>>,
+    node_camera_arm_vertical: Option<Ref<Spatial>>,
+    node_camera: Option<Ref<Spatial>>,
+}
+
+#[methods]
+impl BasicDie {
+    // Register the builder for methods, properties and/or signals.
+    fn register_builder(_builder: &ClassBuilder<Self>) {
+        godot_print!("BasicDie builder is registered!");
+    }
+
+    fn new(_owner: &RigidBody) -> Self {
+        BasicDie {
+            camera_clamp: Vector2 { x: 0.0, y: 0.0 },
+            max_force: 0.0,
+            up_angle: 5.0,
+            stopping_velocity: 0.0,
+            mouse_sensitivity: Vector2 { x: 1.0, y: 1.0 },
+            shoot_sensitivity: 1.0,
+
+            input_state: InputState::Default,
+            current_force: 0.0,
+
+            action_shooting: String::from("mouse_btn_left"),
+
+            node_camera_arm_horizontal: None,
+            node_camera_arm_vertical: None,
+            node_camera: None,
+        }
+    }
+
+    #[export]
+    unsafe fn _ready(&mut self, owner: &RigidBody) {
+        owner.set_physics_process(true);
+
+        // look for the vertical camera arm
+        match self.node_camera_arm_horizontal {
+            Some(arm) => {
+                let save_arm = arm.assume_safe();
+                match save_arm.get_node(NodePath::from_str("CameraArmVertical")) {
+                    Some(node) => {
+                        let save_node = node.assume_safe();
+                        match save_node.cast::<Spatial>() {
+                            Some(casted) => {
+                                let save_casted = casted.claim(); 
+                                self.node_camera_arm_vertical = Some(save_casted)},
+                            _ => godot_warn!("Camera Arm was not of type 'Spatial'"),
+                        }
+                    },
+                    _ => godot_warn!("No vertical arm found.")
+                }
+            },
+            _ => godot_warn!("No horizontal arm to look for the vertical arm")
+        }
+
+        // look for the camera
+        match self.node_camera_arm_vertical {
+            Some(arm) => {
+                let save_arm = arm.assume_safe();
+                match save_arm.get_node(NodePath::from_str("Camera")) {
+                    Some(node) => {
+                        let save_node = node.assume_safe();
+                        match save_node.cast::<Spatial>() {
+                            Some(casted) => {
+                                let save_casted = casted.claim(); 
+                                self.node_camera = Some(save_casted)},
+                            _ => godot_warn!("Camera was not of type 'Spatial'"),
+                        }
+                    },
+                    _ => godot_warn!("No camera found.")
+                }
+            },
+            _ => godot_warn!("No vertical arm to look for the camera")
+        }
+    }
+
+    #[export]
+    unsafe fn _physics_process(&mut self, owner: &RigidBody, _delta: f64) {
+
+        // detect if the die stops moving
+        if matches!(self.input_state, InputState::Moving) {
+            // get the current velocity
+            let current_vel = owner.linear_velocity().length();
+
+            godot_print!("current velocity: {}", current_vel);
+
+            // check if the velocity is less than the threshold and change input state in that case
+            if current_vel <= self.stopping_velocity {
+                self.input_state = InputState::Default;
+            }
+        };
+    }
+
+    #[export]
+    unsafe fn _input(&mut self, owner: &RigidBody, event: Ref<InputEvent>) {
+
+        self.general_input(event.borrow());
+
+        match self.input_state {
+            InputState::Default => self.default_input(event),
+            InputState::Shooting => self.shooting_input(owner, event),
+            InputState::Moving => self.moving_input(event),
+        }
+
+        // look for the horizontal camera arm
+        match owner.get_node(NodePath::from_str("CameraArmHorizontal")) {
+            Some(node) => {
+                let save_node = node.assume_safe();
+                match save_node.cast::<Spatial>() {
+                    Some(casted) => {
+                        let save_casted = casted.claim(); 
+                        self.node_camera_arm_horizontal = Some(save_casted)},
+                    _ => godot_warn!("Camera Arm was not of type 'Spatial'"),
+                }
+            },
+            _ => godot_warn!("No horizontal arm found")
+        }
+
+        // look for the vertical camera arm
+        match self.node_camera_arm_horizontal {
+            Some(arm) => {
+                let save_arm = arm.assume_safe();
+                match save_arm.get_node(NodePath::from_str("CameraArmVertical")) {
+                    Some(node) => {
+                        let save_node = node.assume_safe();
+                        match save_node.cast::<Spatial>() {
+                            Some(casted) => {
+                                let save_casted = casted.claim(); 
+                                self.node_camera_arm_vertical = Some(save_casted)},
+                            _ => godot_warn!("Camera Arm was not of type 'Spatial'"),
+                        }
+                    },
+                    _ => godot_warn!("No vertical arm found.")
+                }
+            },
+            _ => godot_warn!("No horizontal arm to look for the vertical arm")
+        }
+
+        // look for the camera
+        match self.node_camera_arm_vertical {
+            Some(arm) => {
+                let save_arm = arm.assume_safe();
+                match save_arm.get_node(NodePath::from_str("Camera")) {
+                    Some(node) => {
+                        let save_node = node.assume_safe();
+                        match save_node.cast::<Spatial>() {
+                            Some(casted) => {
+                                let save_casted = casted.claim(); 
+                                self.node_camera = Some(save_casted)},
+                            _ => godot_warn!("Camera was not of type 'Spatial'"),
+                        }
+                    },
+                    _ => godot_warn!("No camera found.")
+                }
+            },
+            _ => godot_warn!("No vertical arm to look for the camera")
+        }
+    }
+
+    /// this input method will always be called, regardless of the input state
+    unsafe fn general_input(&mut self, event: &Ref<InputEvent>) {
+        let save_event = event.assume_safe();
+
+        // rotate camera horizontally
+        let mouse_event = save_event.cast::<InputEventMouseMotion>(); // get the input as mouse input
+        match mouse_event {
+            Some(motion_event) => {
+                let x_mov = motion_event.relative().x * self.mouse_sensitivity.x;
+                self.rotate_cam_horizontal(x_mov);
+            },
+            _ => {}
+        }
+    }
+
+    /// this input method will be called when looking around, before taking a shot
+    unsafe fn default_input(&mut self, event: Ref<InputEvent>) {
+        let save_event = event.assume_safe();
+
+        // left mouse button was pressed => switch to shooting mode
+        if save_event.is_action_pressed(GodotString::from_str(&self.action_shooting), false, false) {
+            godot_print!("mouse_button, switching to shooting mode");
+            self.input_state = InputState::Shooting;
+            return;
+        }
+
+        // rotate camera vertically
+        let mouse_event = save_event.cast::<InputEventMouseMotion>(); // get the input as mouse input
+        match mouse_event {
+            Some(motion_event) => {
+                let y_mov = -motion_event.relative().y * self.mouse_sensitivity.y;
+                self.rotate_cam_vertical(y_mov);
+            },
+            _ => {}
+        };
+    }
+
+    /// this input method will be called when player is currently taking a shot
+    unsafe fn shooting_input(&mut self, owner: &RigidBody, event: Ref<InputEvent>) {
+        let save_event = event.assume_safe();
+
+        // mouse released, shoot
+        if save_event.is_action_released(GodotString::from_str(&self.action_shooting), false) {
+            self.input_state = InputState::Moving;
+            self.shoot(owner);
+            return;
+        }
+
+        // charge shot with vertical mouse movement
+        let mouse_event = save_event.cast::<InputEventMouseMotion>(); // get the input as mouse input
+        match mouse_event {
+            Some(motion_event) => {
+                let y_mov = motion_event.relative().y * self.mouse_sensitivity.y;
+                self.current_force = match self.current_force + y_mov {
+                    x if x < 0.0 => 0.0,
+                    x if x > self.max_force => self.max_force,
+                    x => x
+                };
+
+                godot_print!("current force: {}", self.current_force);
+            },
+            _ => {}
+        };
+    }
+
+    /// this input method will be called when player is moving
+    unsafe fn moving_input(&mut self, event: Ref<InputEvent>) {
+        let save_event = event.assume_safe();
+
+        // rotate camera vertically
+        let mouse_event = save_event.cast::<InputEventMouseMotion>(); // get the input as mouse input
+        match mouse_event {
+            Some(motion_event) => {
+                let y_mov = motion_event.relative().y * self.mouse_sensitivity.y;
+                self.rotate_cam_vertical(y_mov);
+            },
+            _ => {}
+        };
+    }
+
+    unsafe fn rotate_cam_horizontal(&mut self, input: f32) {
+        // make sure the arm exists
+        match self.node_camera_arm_horizontal {
+            Some(arm) => {
+                // rotate the horizontal camera arm
+                let save_arm = arm.assume_safe();
+                save_arm.rotate_object_local(Vector3 {x: 0.0, y: 1.0, z: 0.0}, input as f64)
+            },
+            _ => godot_warn!("No horizontal camera arm assigned.")
+        }
+    }
+
+    unsafe fn rotate_cam_vertical(&mut self, input: f32) {
+        // make sure the camera arm actually exists
+        match self.node_camera_arm_vertical {
+            Some(arm) => {
+                // check for the current rotation
+                let save_arm = arm.assume_safe();
+                let current_rot = save_arm.rotation();
+
+                // clamp the rotation
+                if current_rot.x + input > self.camera_clamp.x || current_rot.x + input <= self.camera_clamp.y {
+                    return;
+                }
+
+                // actually rotate if possible
+                let save_arm = arm.assume_safe();
+                save_arm.rotate_object_local(Vector3 {x: 1.0, y: 0.0, z: 0.0}, input as f64)
+            },
+            _ => godot_warn!("No vertical camera arm assigned")
+        }
+    }
+
+    unsafe fn shoot(&mut self, owner: &RigidBody) {
+        // make sure the camera actually exists
+        match self.node_camera {
+            Some(cam) => {
+                // get the base position of the node
+                let base_pos = owner.transform().origin;
+
+                // get the save reference
+                let save_cam = cam.assume_safe();
+                
+                // get the forward vector of the camera setting the up angle to the defined value in the editor
+                let mut forward_vector = save_cam.global_transform().basis.c();
+                forward_vector.y = self.up_angle;
+
+                // calculate the impulse force
+                let impulse = forward_vector.normalized() * self.current_force;
+
+                // actually add the force
+                owner.apply_impulse(base_pos, impulse); 
+            },
+            None => godot_warn!("No camera assigned!"),
+        }
+    }
+}