star.cpp

#include "star.h"

star::star(int number) :sum(number)//, shape(InvalidColor)
{

	for (int i = 0; i < sum; i++)
	{
		stars.push_back(shapes{});
		stars[i].x = 5 + rand() % 990;
		stars[i].y = 5+rand()%710;
		stars[i].angle = rand()%72;
		stars[i].r =2 + rand()%20;
		
	}
} 

star::~star()
{
}

void star::update(int time)
{

	int colorChange3;
	int colorChange2;
	int angleChange;

		for (int i = 0; i < sum; i++)
		{
			if (time % 3 == 0)
			{
				angleChange = rand() % 100;

				if (time % 100 == 0)
				{
					stars[i].x = 5 + rand() % 890;
					stars[i].y = 5 + rand() % 510;
				}
				double a = pi / 2 + stars[i].angle + angleChange;
				if (time % 2)
					stars[i].r++;
				else stars[i].r--;

				for (int t = 0; t < 5; t++)
				{
					stars[i].place[t].x = int(stars[i].x + cos(a) * stars[i].r);
					stars[i].place[t].y = int(stars[i].y - sin(a) * stars[i].r);
					a += pi * 4 / 5;
				}


				colorChange3 = rand() % 255;
				colorChange2 = 200 + rand() % 55;
				stars[i].color = RGB(static_cast<BYTE>(colorChange2), static_cast<BYTE>(colorChange2), static_cast<BYTE>(colorChange3));

			}
			draw(i);
		}

	
		
}

void star::draw(int i)
{
	setpolyfillmode(WINDING);
	setfillcolor(stars[i].color);
	// »æÖÆÎå½ÇÐÇ(Îޱ߿ò)
	solidpolygon(stars[i].place, 5);
}