From e349a9fc27b0da0c75ac845ab4227583c068c1f0 Mon Sep 17 00:00:00 2001
From: des <18638715007@163.com>
Date: Tue, 6 Jan 2026 00:18:13 +0800
Subject: [PATCH] =?UTF-8?q?=E5=88=9D=E6=AD=A5=E7=89=A9=E7=90=86=E8=AE=A1?=
 =?UTF-8?q?=E7=AE=97?=
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---
 palyer.gd   | 59 ++++++++++++++++++++++++++++++++++++++---------------
 palyer.tscn |  9 ++++----
 2 files changed, 48 insertions(+), 20 deletions(-)

diff --git a/palyer.gd b/palyer.gd
index dcb4710..1c500fc 100644
--- a/palyer.gd
+++ b/palyer.gd
@@ -1,29 +1,56 @@
 extends CharacterBody3D
 
-var speed = 14
+## 角色的质量，单位 kg
+const weight := 60
+## 角色前进的动力,同样先简化处理，单位 N
+const power := 800
+## 一个最简单的阻尼系数[br]
+## 阻力计算公式 速度² × 阻尼系数[br]
+## 假设最高速度是慢跑 10km/h , 2.77m/s，那么阻力需要在这个速度下维持和动力平衡。也就是...104.3
+const damping := 104.3
+## 最后一次计算之后的，当前运动状态的向量
+var last_vector = Vector3.ZERO
 
 var fall_acceleration = 75
 
 var target_velocity = Vector3.ZERO
 
-func _physics_process(delta: float):
-	var direction = Vector3.ZERO
-	if Input.is_action_pressed("move_forward"):
-		direction.z -= 1
-	if Input.is_action_pressed("move_back"):
-		direction.z += 1
-	if Input.is_action_pressed("move_left"):
-		direction.x -= 1
-	if Input.is_action_pressed("move_right"):
-		direction.x += 1
-	if direction != Vector3.ZERO:
-		direction = direction.normalized()
-		$pivot.basis = Basis.looking_at(direction)
-	target_velocity.x = direction.x * speed
-	target_velocity.z = direction.z * speed
+func _physics_process(delta: float) -> void:
+	# 指令方向
+	var cmd_vector_direction := get_cmd_vector()
+	# 运动方向
+	var pre_vector_direction = last_vector.normalized()
+	# 计算当前运动状态，方向在上一步已经更新过了。剩下的是模量问题。
+	# 指令力
+	var cmd_vector_power = cmd_vector_direction * power
+	# 阻力
+	var damping_vector = -pre_vector.normalized() * last_vector.length_squared() * damping
+		
+	# 若指令方向和运动方向不同，则必然会产生
+	if cmd_vector_direction != pre_vector_direction:
+		pre_vector_direction = (pre_vector_direction + cmd_vector_direction).normalized()
+		$pivot.basis = Basis.looking_at(pre_vector_direction)
+	# 速度计算部分
+	#target_velocity.x = direction.x * now_speed
+	#target_velocity.z = direction.z * now_speed
 	
 	if !is_on_floor():
 		target_velocity.y = target_velocity.y - ( fall_acceleration * delta )
 	
 	velocity = target_velocity
 	move_and_slide()
+	
+## 获取当前指令的关联向量[br]
+## 难道需要两层才生效？
+func get_cmd_vector() -> Vector3:
+	var vector := Vector3.ZERO
+	if Input.is_action_pressed("move_forward"):
+		vector.z -= 1
+	if Input.is_action_pressed("move_back"):
+		vector.z += 1
+	if Input.is_action_pressed("move_left"):
+		vector.x -= 1
+	if Input.is_action_pressed("move_right"):
+		vector.x += 1
+	return vector.normalized()
+	
diff --git a/palyer.tscn b/palyer.tscn
index ff98565..aaa3028 100644
--- a/palyer.tscn
+++ b/palyer.tscn
@@ -3,8 +3,9 @@
 [ext_resource type="PackedScene" uid="uid://dolueyckipny0" path="res://art/player.glb" id="1_ed8k8"]
 [ext_resource type="Script" uid="uid://di50p6h46nmlw" path="res://palyer.gd" id="1_vgmp0"]
 
-[sub_resource type="BoxShape3D" id="BoxShape3D_vgmp0"]
-size = Vector3(1.954834, 3.081192, 1.1972656)
+[sub_resource type="CylinderShape3D" id="CylinderShape3D_vgmp0"]
+height = 1.2167969
+radius = 1.0029297
 
 [node name="palyer" type="CharacterBody3D"]
 script = ExtResource("1_vgmp0")
@@ -14,5 +15,5 @@ script = ExtResource("1_vgmp0")
 [node name="player" parent="pivot" instance=ExtResource("1_ed8k8")]
 
 [node name="CollisionShape3D" type="CollisionShape3D" parent="."]
-transform = Transform3D(1, 0, 0, 0, 0.0023910538, 0.99999714, 0, -0.99999714, 0.0023910538, 0.0345459, 0.12650633, 0.40051335)
-shape = SubResource("BoxShape3D_vgmp0")
+transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0.018975854, 0.14160156, 0)
+shape = SubResource("CylinderShape3D_vgmp0")