Black to White Gradient PPM

BlackToWhiteGradientPPM.cpp

#include <iostream>
#include <fstream>

//Gradient 함수
void Gradient(int size_x, int size_y)
{
	//파일 출력
	std::ofstream out("Gradient.ppm");

	//PPM 헤더 설정
	out << "P3\n" << size_x << " " << size_y << "\n"
		<< "255\n";

	for (int y = 0; y < size_y; y++)
	{
		for (int x = 0; x < size_x; x++)
		{
			double opt;
			opt = (x / (double)size_x)*255;
			out << (int)opt << " " << (int)opt << " " << (int)opt << " ";
		}
		out << "\n";
	}
	out.close();
}

int main() {
	Gradient(1024, 1024);
	std::cout << "FINISHED" << std::endl;
	return 0;
}