geometri.cpp

#include "geometri.h"

// POINTARRAY 4.2

PointArray :: PointArray (){
	size = 0;
	points = new Point [0]; //Permite borrar más tarde
}
PointArray :: PointArray(const Point ptsToCopy[], const int toCopySize) {
{
	size = toCopySize;
	points = new Point[toCopySize];
	for(int i = 0; i < toCopySize; ++i){
		points[i] = ptsToCopy[i];
	}
}
PointArray :: PointArray(const PointArray &other){
	size = other.size;
	points = new Point[size];
	for(int i = 0; i < size; i++){
		points[i]=other.points[i];
	}
}

void PointArray :: resize(int newSize){
	Point *pts = new Point[newSize];
	int minSize = (newSize > size ? size : newSize);
	for(int i = 0; i < minSize; i++)
		pts[i] = points[i];
	delete[] points;
	size = newSize;
	points = pts;
}

void PointArray ::clear(){
	resize(0);
}

void PointArray :: push_back(const Point &p){
	resize(size+1);
	points[size-1] = p; 
}

void PointArray :: insert(const int pos, const Point &p){
	resize(size + 1);
	for(int i = size - 1; i > pos; i--){
		points[i] = points[i-1];
	}
	points[pos] = p;
}

void PointArray :: remove(const int pos){
	if(pos >= 0 && pos < size){  				 // desplazar a la izquierda
		for(int i = pos; i < size - 2; i++){
			points[i] = points[i+1];
		}
		resize(size - 1);
	}
}

Point *PointArray ::get(const int pos){
	return pos >= 0 && pos < size ? points + pos : NULL;
}
const Point *PointArray ::get(const int pos)cons {
	return pos >= 0 && pos < size ? points + pos : NULL;
}