3.引擎基础组件-Node类实现

基类是设计模式中的模板方法模式，主要存放了一些通用的代码。

当时使用了U2D和U3D把2D UI和3D UI给区分开了，基类里面存放的主要的是本地矩阵和世界矩阵，角度、锚点、缩放、z顺序等。

Node.h

#pragma once

namespace U2D
{
	class CNode;
	class CUI;
	class Cobject;
	class CAnimate;
	class CAnimateEx;
	class CAnimation;
	enum MovementEvent;
	typedef void (CNode::*event_selector)(CUI*);
	typedef void (CNode::*collider_selector)(int, Cobject*, int);//前面的int是自己的第几个碰撞区,中间的是对方的指针,后面的int是对方的第几个碰撞区
	typedef void (CNode::*animate_selector)(CAnimate*, MovementEvent);
	typedef void (CNode::*animation_selector)(CAnimation*, MovementEvent, char *);
	typedef void (CNode::*animateEx_selector)(CAnimateEx*, MovementEvent, int);//后面的int应该是索引在第几张图片


	class CNode
	{
		friend class CScene;
	protected:
		CNode *parent;	//父节点

	public:
		Matrix3 local_matrix; //自身矩阵
		Matrix3 world_matrix; //世界矩阵
		sColor local_color; //自身颜色
		sColor world_color; //世界颜色
		Vector2 pos;		//坐标偏移
		Vector2 scale;		//缩放
		Vector2 anchor; //锚点

		float angle;	//角度
		bool visible;   //是否可见
		bool flip;		//是否翻转

		int zOrder = 0;
		bool auto_sort = false;
		//set
		void setParent(CNode *parent) { this->parent = parent; }
		void setVisible(bool visible) { this->visible = visible; }
		void setAlpha(BYTE alpha) { local_color.a = (float)alpha / 255; }
		void setPosition(float x, float y) { this->pos.x = x; this->pos.y = y; }
		void setPosition(Vector2 p) { this->pos = p; }
		void setX(float x) { pos.x = x; }
		void setY(float y) { pos.y = y; }
		void setScale(float sx, float sy) { this->scale.x = sx; this->scale.y = sy; }
		void setFilp(bool flip) { this->flip = flip; }
		void setColor(BYTE r, BYTE g, BYTE b) { local_color.r = (float)r / 255; local_color.g = (float)g / 255; local_color.b = (float)b / 255; }
		void setAnchor(float ox, float oy) { this->anchor.x = ox; this->anchor.y = oy; }
		void setAngle(float angle) { this->angle = angle; }
		//get
		int getZorder() { return zOrder; }
		CNode*getPraent() { return parent; }
		sColor &getWorldColor() { return world_color; }
		Matrix3 &getWorldMatrix() { return world_matrix; }
		sColor &getlocalColor() { return local_color; }
		Matrix3 &getlocalMatrix() { return local_matrix; }
		float getScaleX() { return scale.x; }//水平翻转比值
		float getScaleY() { return scale.y; }//垂直翻转比值
		BYTE getAlpha() { return local_color.a * 255; }
		Vector2 getPosition() { return pos; }
		float getAngle() { return angle; }
		//bool
		bool isVisible() { return visible; }
		bool isFlip() { return flip; }
		void setZorder(int z) { this->zOrder = z; this->auto_sort = false; }

		CNode();
		virtual ~CNode() {};
	};

	class CElement :public CNode
	{
	public:
		virtual void draw() {};
		virtual RECT getBoundBox() = 0;
		virtual ~CElement() {};
	};

	//碰撞aabb
	struct COLLIDER//这个是对象和对象的碰撞
	{
#define MaxHitArea 5	//最多只有5个碰撞点
		CAnimateEx *animEx;	//动画加强版的指针
		struct
		{
			int hitIndex;//碰撞的索引
			RECT hitRect;//碰撞的范围
		}lastAabb[MaxHitArea], nowAabb[MaxHitArea]; //碰撞点的数组，最多只有5个，不然效率低了
		int lastAabbNum;	//上一个碰撞的编号
		int nowAabbNum;		//现在的碰撞编号

		struct
		{
			int hitIndex;
			bool lastIn;
			bool nowIn;
		}hitQueue[MaxHitArea];
		int hitQueueNum;

		collider_selector listener_enter; //碰撞监听[进入]
		collider_selector listener_exit;//碰撞监听[离开]

		COLLIDER(CAnimateEx *animEx, collider_selector fun_enter, collider_selector fun_exit);
		void GenerateHitQueue();

		static bool Intersects(RECT &a, RECT &b)
		{
			if (a.left<b.right && a.right>b.left &&
				a.top<b.bottom && a.bottom>b.top)
			{
				return true;
			}
			return false;
		}
	};

}

Node.cpp

#include "Engine.h"

namespace U2D
{
	CNode::CNode()
	{
		scale = Vector2(1.0, 1.0);
		anchor = Vector2(0.5, 0.5);
		pos = Vector2(0, 0);
		visible = true;
		flip = false;
		angle = 0;

		if (CPlateForm::getInstance()->getAutoSort() == true)
			auto_sort = true;
		else
			auto_sort = false;
	}



	COLLIDER::COLLIDER(CAnimateEx *animEx, collider_selector fun_enter, collider_selector fun_exit)
	{
		this->animEx = animEx;
		listener_enter = fun_enter;
		listener_exit = fun_exit;

		lastAabbNum = 0;
		nowAabbNum = 0;
		hitQueueNum = 0;
	}


	void COLLIDER::GenerateHitQueue()
	{
		if (lastAabbNum > nowAabbNum)
		{
			hitQueueNum = lastAabbNum;
			for (int i = 0; i < hitQueueNum; i++)
			{
				hitQueue[i].hitIndex = lastAabb[i].hitIndex;
				hitQueue[i].lastIn = true;
				if (i < nowAabbNum)
					hitQueue[i].nowIn = true;
				else
					hitQueue[i].nowIn = false;
			}
		}
		else
		{
			hitQueueNum = nowAabbNum;
			for (int i = 0; i < hitQueueNum; i++)
			{
				hitQueue[i].hitIndex = nowAabb[i].hitIndex;
				hitQueue[i].nowIn = true;
				if (i < lastAabbNum)
					hitQueue[i].lastIn = true;
				else
					hitQueue[i].lastIn = false;
			}
		}
	}

}