preapre for cthulhu

gdrust/src/player.rs

@@ -1,46 +1,127 @@
-use godot::engine::{Area2D, CharacterBody2D, ICharacterBody2D};
+use core::panic;
+use godot::engine::{CharacterBody2D, GpuParticles2D, ICharacterBody2D, Timer};
 use godot::obj::WithBaseField;
 use godot::prelude::*;
+use std::time::{Duration, Instant};
 
 #[derive(GodotClass)]
 #[class(base = CharacterBody2D)]
 pub struct Player {
     #[var]
     health: i32,
     base: Base<CharacterBody2D>,
+    status: Movement,
+    /// 上一次点击克盾冲刺键的时间,记录来判断双击
+    click_time: Instant,
+    /// 上一次的类型
+    click_type: Click,
 }
 
+/// 描述按键点击状态
+#[derive(PartialEq, Eq, Debug)]
+enum Click {
+    Right,
+    Left,
+    Up,
+    Down,
+    None,
+}
+
+/// 控制玩家状态
+#[derive(PartialEq, Eq, Debug)]
+enum Movement {
+    /// 克盾冲刺
+    Rush,
+    // 普通移动
+    Move,
+}
+
+const MOVE_RIGHT: &str = "move_right";
+const MOVE_LEFT: &str = "move_left";
+const MOVE_UP: &str = "move_up";
+const MOVE_DOWN: &str = "move_down";
+const SLOW_DOWN: &str = "slow_down";
+
 #[godot_api()]
 impl ICharacterBody2D for Player {
     fn init(base: Base<CharacterBody2D>) -> Player {
         // godot_print!("Player created from Godot Rust");
         Self {
             base,
             health: Self::MAX_HEALTH,
+            status: Movement::Move,
+            click_time: Instant::now(),
+            click_type: Click::None,
         }
     }
 
     fn ready(&mut self) {}
 
     fn physics_process(&mut self, delta: f64) {
-        let mut vel = Vector2::ZERO;
         let input_obj = Input::singleton();
-        if input_obj.is_action_pressed("move_left".into()) {
+        let mut speed = Self::SPEED;
+        if input_obj.is_action_pressed(SLOW_DOWN.into()) {
+            speed /= 2;
+        }
+        if self.status == Movement::Rush {
+            godot_print!("rush inside!");
+            let vel = Vector2::new(
+                match self.click_type {
+                    Click::Left => -Self::RUSH_SPEED as f32,
+                    Click::Right => Self::RUSH_SPEED as f32,
+                    _ => {
+                        let msg = format!("wrong movement {:?} when rush", self.click_type);
+                        godot_error!("{}", &msg);
+                        panic!("{}", &msg);
+                    }
+                },
+                0.0,
+            );
+            self.base_mut()
+                .move_and_collide(vel * delta as f32 * speed as f32);
+            return;
+        }
+        let mut vel = Vector2::ZERO;
+        if input_obj.is_action_pressed(MOVE_LEFT.into()) {
             vel.x -= 1.0;
         }
-        if input_obj.is_action_pressed("move_right".into()) {
+        if input_obj.is_action_pressed(MOVE_RIGHT.into()) {
             vel.x += 1.0;
         }
-        if input_obj.is_action_pressed("move_up".into()) {
+        // 触发克盾
+        if input_obj.is_action_just_pressed(MOVE_LEFT.into())
+            && self.click_type == Click::Left
+            && self.click_time.elapsed() < Duration::new(0, 100 * 1000)
+        {
+            self.start_rush();
+        }
+        if input_obj.is_action_just_pressed(MOVE_LEFT.into())
+            && self.click_type == Click::Left
+            && self.click_time.elapsed() < Duration::new(0, 100 * 1000)
+        {
+            self.start_rush();
+        }
+        // 记录克盾第一次按按钮
+        if input_obj.is_action_just_released(MOVE_RIGHT.into()) {
+            self.click_time = Instant::now();
+            self.click_type = Click::Right;
+        }
+        if input_obj.is_action_just_released(MOVE_LEFT.into()) {
+            self.click_time = Instant::now();
+            self.click_type = Click::Left;
+        }
+        if input_obj.is_action_just_released(MOVE_DOWN.into()) {
+            self.click_type = Click::Down;
+        }
+        if input_obj.is_action_just_released(MOVE_UP.into()) {
+            self.click_type = Click::Up;
+        }
+        if input_obj.is_action_pressed(MOVE_UP.into()) {
             vel.y -= 1.0;
         }
-        if input_obj.is_action_pressed("move_down".into()) {
+        if input_obj.is_action_pressed(MOVE_DOWN.into()) {
             vel.y += 1.0;
         }
-        let mut speed = Self::SPEED;
-        if input_obj.is_action_pressed("slow_down".into()) {
-            speed /= 2;
-        }
         let res = self
             .base_mut()
             .move_and_collide(vel.normalized() * speed as f32 * delta as f32);
@@ -52,6 +133,8 @@ impl Player {
     #[constant]
     const SPEED: i32 = 500;
     #[constant]
+    const RUSH_SPEED: i32 = 700;
+    #[constant]
     const MAX_HEALTH: i32 = 100;
     #[signal]
     fn hit_sig(attack: i32);
@@ -62,4 +145,28 @@ impl Player {
         self.base_mut()
             .emit_signal("hit_sig".into(), &[attack.to_variant()]);
     }
+
+    fn start_rush(&mut self) {
+        godot_print!("rush inside!");
+        self.status = Movement::Rush;
+        // 冲刺结束计时器
+        let mut timer = self.base().get_node_as::<Timer>("Cthulhu");
+        timer.start();
+        // 启动拖尾粒子
+        let mut particle = self.get_virtual_particle();
+        particle.set_emitting(true);
+    }
+
+    fn get_virtual_particle(&self) -> Gd<GpuParticles2D> {
+        self.base().get_node_as::<GpuParticles2D>("virtual")
+    }
+
+    #[func]
+    fn stop_rush(&mut self) {
+        godot_print!("rush!");
+        let mut particle = self.get_virtual_particle();
+        particle.set_emitting(false);
+        self.status = Movement::Move;
+        self.click_type = Click::None;
+    }
 }

scenes/fight.tscn

@@ -1,4 +1,4 @@
-[gd_scene load_steps=17 format=3 uid="uid://cibwxaqnuodid"]
+[gd_scene load_steps=22 format=3 uid="uid://cibwxaqnuodid"]
 
 [ext_resource type="Texture2D" uid="uid://cqp3l8q7xbxrt" path="res://resources/images/weapons/Zenith.webp" id="3_2spkb"]
 [ext_resource type="PackedScene" uid="uid://dn2ixin15jtt3" path="res://scenes/weapons/star_wrath.tscn" id="4_8ipx5"]
@@ -16,6 +16,28 @@
 [ext_resource type="Texture2D" uid="uid://do5eitiicfjge" path="res://resources/images/shields/Shield_of_Cthulhu.webp" id="14_gkc4x"]
 [ext_resource type="Texture2D" uid="uid://drljhif31i83o" path="res://resources/images/UI/CategoryPanel.png" id="14_miw1s"]
 
+[sub_resource type="Gradient" id="Gradient_w6p7b"]
+offsets = PackedFloat32Array(0.315, 0.435, 1)
+colors = PackedColorArray(0, 0, 0, 1, 0, 0, 0, 1, 1, 1, 1, 1)
+
+[sub_resource type="GradientTexture1D" id="GradientTexture1D_0mtog"]
+gradient = SubResource("Gradient_w6p7b")
+
+[sub_resource type="Curve" id="Curve_k6gjo"]
+_data = [Vector2(0, 0.494505), 0.0, 0.0, 0, 0, Vector2(1, 0.274725), 0.0, 0.0, 0, 0]
+point_count = 2
+
+[sub_resource type="CurveTexture" id="CurveTexture_yl2ko"]
+curve = SubResource("Curve_k6gjo")
+
+[sub_resource type="ParticleProcessMaterial" id="ParticleProcessMaterial_adfmi"]
+gravity = Vector3(0, 0, 0)
+scale_min = 4.5
+scale_max = 5.0
+scale_curve = SubResource("CurveTexture_yl2ko")
+color = Color(1, 0, 0, 1)
+color_ramp = SubResource("GradientTexture1D_0mtog")
+
 [sub_resource type="CircleShape2D" id="CircleShape2D_yfrnq"]
 radius = 52.67
 
@@ -48,9 +70,17 @@ texture = ExtResource("3_2spkb")
 
 [node name="Player" type="Player" parent="."]
 position = Vector2(570, 414)
-rotation = 1.5708
 scale = Vector2(0.2, 0.2)
 
+[node name="virtual" type="GPUParticles2D" parent="Player"]
+emitting = false
+amount = 4
+process_material = SubResource("ParticleProcessMaterial_adfmi")
+texture = ExtResource("5_3ufqu")
+lifetime = 0.2
+speed_scale = 2.0
+trail_lifetime = 0.5
+
 [node name="HitPoint" type="CollisionShape2D" parent="Player"]
 shape = SubResource("CircleShape2D_yfrnq")
 debug_color = Color(1, 1, 1, 1)
@@ -67,6 +97,9 @@ scale = Vector2(0.2, 0.2)
 shape = SubResource("CircleShape2D_yfrnq")
 debug_color = Color(1, 1, 1, 1)
 
+[node name="Cthulhu" type="Timer" parent="Player"]
+wait_time = 0.1
+
 [node name="BlockDrawer" type="BlockDrawer" parent="."]
 light_mask = 3
 visibility_layer = 3
@@ -161,3 +194,4 @@ position = Vector2(0, -1)
 texture = ExtResource("14_gkc4x")
 
 [connection signal="hit_sig" from="Player" to="HealthBar" method="attack"]
+[connection signal="timeout" from="Player/Cthulhu" to="Player" method="stop_rush"]