Project collapse

gistfile1.txt

#include <stdio.h>
#include <vector>

class Impact;

struct Circle
{
	float x, y, r;
};

struct Point
{
	float x, y;
};

class Snake
{
	Circle head;
	std::vector<Point> points;
	friend Impact;
};

class Bonus
{
	Circle pos;
	friend Impact;
};

enum type_of_impact {snake_snake_pat, snake_1_won, snake_2_won, snake_bonus, undef_collapse};

class Impact{
	type_of_impact _type;
	Point _coords;
	Impact(type_of_impact type, Point coords){
		_type = type;
		_coords = coords;
	}
	static float from_point_to_line(float x0, float y0, float x1, float y1, float x2, float y2){
		return ((y1-y2)*x0+(x1-x2)*y0+(y1*x2-y2*x1))/sqrt((y1-y2)*(y1-y2)+(x1-x2)*(x1-x2));
	}
public:
	static Impact* impact(Snake sn1, Snake sn2){
		//голова в голову
		if(pow(sn1.head.x-sn2.head.x,2) + pow(sn1.head.y-sn2.head.y,2) <= sn1.head.r+sn2.head.r ){
			Point temp;
			temp.x = (sn1.head.x+sn2.head.x)/2;
			temp.y = (sn1.head.y+sn2.head.y)/2;
			return new Impact(type_of_impact(0),temp);
		}
		for(int i = 1; i <sn1.points.size(); i++){
			//вторая змейка "догнала" первую
			if(from_point_to_line(sn2.head.x,sn2.head.y,sn1.points[i].x,sn1.points[i].y,sn1.points[i-1].x,sn1.points[i-1].x) <= sn1.head.r+sn2.head.r ){
				Point temp;
				temp.x = (sn1.points[i].x+sn2.head.x)/2;
				temp.y = (sn1.points[i].y+sn2.head.y)/2;
				return new Impact(type_of_impact(1),temp);
			}
			//первая змейка "догнала" вторую
			if(from_point_to_line(sn1.head.x,sn1.head.y,sn2.points[i].x,sn2.points[i].y,sn2.points[i-1].x,sn2.points[i-1].x) <= sn2.head.r+sn1.head.r ){
				Point temp;
				temp.x = (sn2.points[i].x+sn1.head.x)/2;
				temp.y = (sn2.points[i].y+sn1.head.y)/2;
				return new Impact(type_of_impact(2),temp);
			}
		}
		return NULL;
	}
	static Impact* impact(Snake sn1, Bonus bonus){
		if(pow(sn1.head.x-bonus.pos.x,2) + pow(sn1.head.y-bonus.pos.y,2) <= sn1.head.r+bonus.pos.r ){
			Point temp;
			temp.x = (sn1.head.x+bonus.pos.x)/2;
			temp.y = (sn1.head.y+bonus.pos.y)/2;
			return new Impact(type_of_impact(3),temp);
		}
		return NULL;
	}
	static Impact* impact(Snake sn1, Point pos){
		if(pow(sn1.head.x-pos.x,2) + pow(sn1.head.y-pos.y,2) <= sn1.head.r )
			return new Impact(type_of_impact(4),pos);
		return NULL;
	}
};