#include "pch.h" // use stdafx.h in Visual Studio 2017 and earlier
#include "Path.h"


ClipSet clipSet;
BranchPointSet branchPointSet;

P dirP(P &A){
	P B;
	B.x=A.dx;
	B.y=A.dy;
	B.z=A.dz;
	return B;
}

Path::Path(){
	dia=0;
}

//返回path中点的数量
int Path::size() {
	assert(inOut.size() == points.size());
	return points.size();
}


void Path::markPoint(){
	for(int i=0;i<points.size();i++){
		P& tp=points[i];
		if(tp.type==1||tp.type==2){
			BranchPoint *pb=branchPointSet.getBranchPointPointer(tp.ref);
			pb->used=true;
			pb->pc1->used=true;
			pb->pc2->used=true;
		}
		else if(tp.type==0){
			clipSet.c[tp.ref].used=true;
		}
	}
}

//固定所有经过的分支点
void Path::fixBranchPoint(){
	for(int i=0;i<points.size();i++){
		P& tp=points[i];
		if(tp.type==1){
			BranchPoint *pb=branchPointSet.getBranchPointPointer(tp.ref);
			pb->fix();
		}
	}
}

//检查路径合法性
void Path::illegalCheck(){
	map<P,int>vis;
	for(int i=0;i<points.size();i++){
		assert(vis[points[i]]==0);
		vis[points[i]]=1;
		if(i==0||i==points.size()-1){
			assert(points[i].type==3);
		}
		if(points[i].type!=0){
			assert(inOut[i]<0);
		}
	}
}

//将路径中的点翻转成正常反向，并生成inOut数组
void Path::processDir(){
	for(int j=0;j<points.size();j++){
		if(points[j].type!=0){
			inOut.push_back(-1);
			continue;
		}
		double reverse=0;
		P dir=dirP(points[j]);
		if(j!=0){
			reverse+=pi/2-Angle(points[j]-points[j-1],dir);
		}
		if(j!=points.size()-1){
			reverse+=pi/2-Angle(points[j+1]-points[j],dir);
		}
		if(reverse<0){
			//points[j].reverse();
			inOut.push_back(1);
		}
		else inOut.push_back(0);
	}
}

//在路径确定后，处理一些能在pass层面处理的信息
void Path::postProcess(){
	this->fixBranchPoint();
	//this->processDir();
	this->markPoint();
}

//翻转整条路径
void Path::reverse(){
	std::reverse(points.begin(),points.end());
	assert(inOut.size()==points.size());
	for(int i=0;i<points.size();i++){
		if(inOut[i]!=-1){
			inOut[i]=inOut[i]^1;
			points[i].reverse();
		}		
	}
}