Systematic Love

SystematicLove.cpp

#include <iostream>
#include <math.h>

const int HEART_SIZE = 20;
const int HALF_SIZE = HEART_SIZE / 2;

bool is_in_love(int x, int y);

int main(void)
{
	std::string message = " SYSTEMATIC LOVE";
	int message_indent = (HALF_SIZE - (message.length() / 4)) - 1;
	
	for(int y = 0; y < HEART_SIZE; ++y)
	{
		for(int x = 0; x < HEART_SIZE; ++x)
		{
			std::cout << ((is_in_love(x,y)) ? "vv" : "  ");
			
			if(y == HALF_SIZE -1)
			{
				if(x == message_indent)
				{
					std::cout << message.c_str();
					x += (message.length() / 2);
				}
			}
		}
		std::cout << "\n";
	}
	
	return 0;
}

bool is_in_love(int x, int y)
{
	const float width = 2.2f;
	const float height = 3.0f;
	const float HEART_COEFFICIENT = 0.7f;
	
	float check_x = ((static_cast<float>(x) / static_cast<float>(HEART_SIZE)) - 0.5f) * width;
	float check_y = ((static_cast<float>(HEART_SIZE - y) / static_cast<float>(HEART_SIZE)) - 0.4f) * height;
	
	float top_y = 0.0f;
	float bottom_y = 0.0f;
	
	if(check_x >= 0)
	{
		top_y = sqrt(1 - (check_x * check_x)) + (HEART_COEFFICIENT * sqrt(check_x));
		bottom_y = -sqrt(1 - (check_x * check_x)) + (HEART_COEFFICIENT * sqrt(check_x));
	}
	else
	{
		top_y = sqrt(1 - (check_x * check_x)) + (HEART_COEFFICIENT * sqrt(-check_x));
		bottom_y = -sqrt(1 - (check_x * check_x)) + (HEART_COEFFICIENT * sqrt(-check_x));
	}
	
	if((bottom_y <= check_y) && (check_y <= top_y))
	{
		return true;
	}
	else
	{
		return false;
	}
}