An image generator that uses 3 functions to generate a PPM image. Useful for quick math image tests. #template

ImageGenerator.cs

using System;
using System.IO;

public class Program
{
	static string filename = "image.ppm";
	
	static int width = 1024;
	static int height = 1024;

	public static void Main()
	{
		byte[] pixelData = new byte[width * height * 3];
		for(int x = 0; x < width; ++x)
		{
			for(int y = 0; y < height; ++y)
			{
				int currentPixel = ((y * width) + x) * 3;
				pixelData[currentPixel] = redPixel(x, y);
				pixelData[currentPixel + 1] = greenPixel(x, y);
				pixelData[currentPixel + 2] = bluePixel(x, y);
			}
		}

		StreamWriter destination = new StreamWriter(filename);
		destination.Write("P6\n{0} {1}\n{2}\n", width, height, 255);
		destination.Flush();
		destination.BaseStream.Write(pixelData, 0, pixelData.Length);
		destination.Close();
	}

	public static byte redPixel(int x, int y)
	{
		return y;
	}
	public static byte greenPixel(int x, int y)
	{
		return (x + y) % 255;
	}
	public static byte bluePixel(int x, int y)
	{
		return x;
	}
}