Godot 官方2D C#重构(1)：雪花碰撞

前言

Godot 官方 教程

Godot 2d 官方案例C#重构 专栏

Godot 2d 重构 github地址

实现效果

难点介绍

Godot GDScript和C# 对应关系大部分靠猜

文件导入

• 资源地址：默认为res://开头
• 2D贴图导入类型：Texture2D

public Texture2D Bullet_Image = new Texture2D();
Bullet_Image = GD.Load<Texture2D>("res://bullet.png");
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2D属性赋值，PhysicsServer

PhysicsServer 用于给赋值属性和属性初始化

Shape = PhysicsServer2D.CircleShapeCreate();
PhysicsServer2D.ShapeSetData(Shape,8);
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刷新UI

在_Process里面调用QueueRedraw

public override void _Process(double delta)
{
	QueueRedraw();
}
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绘制UI

生成2D贴图

DrawTexture(Texture2D img, Vector2 position);
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重载_Draw函数

    public override void _Draw()
    {
		var offset = -Bullet_Image.GetSize();
		//Godot重载了对应的运算符
		offset = offset /2;
		
        foreach (var item in bullets)
		{
			DrawTexture(Bullet_Image, item.position + offset);
		}
        base._Draw();
    }
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离开页面销毁

销毁

PhysicsServer2D.FreeRid(item.body);
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离开页面销毁

    public override void _ExitTree()
    {
		foreach (var item in bullets)
		{
			PhysicsServer2D.FreeRid(item.body);
		}
		PhysicsServer2D.FreeRid(Shape);
        base._ExitTree();
    }
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定位到鼠标位置

重载 _Input函数，获取鼠标参数

public override void _Input(InputEvent @event)
{
	if(@event is InputEventMouseMotion)
	{
		var mouseEvent = (@event as InputEventMouseMotion);
		Position = mouseEvent.Position;
	}
    base._Input(@event);
}
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