Added *nix support

ConsoleRayTracing.cpp

@@ -1,38 +1,27 @@
 #include <iostream>
-#include <stdio.h>
+#include <vector>
+#include <string>
 #include <math.h>
-#include <windows.h>
-#include "VecFunctions.h"
 
-void SetWindow(int Width, int Height)
-{
-	_COORD coord;
-	coord.X = Width;
-	coord.Y = Height;
-	_SMALL_RECT Rect;
-	Rect.Top = 0;
-	Rect.Left = 0;
-	Rect.Bottom = Height - 1;
-	Rect.Right = Width - 1;
-	HANDLE Handle = GetStdHandle(STD_OUTPUT_HANDLE);
-	SetConsoleScreenBufferSize(Handle, coord);
-	SetConsoleWindowInfo(Handle, TRUE, &Rect);
-}
+#include "VecFunctions.h"
+#include "platforms.cpp"
 
 int main() {
-	int width = 120 * 2;
-	int height = 30 * 2;
-	SetWindow(width, height);
+
+	std::ios_base::sync_with_stdio(false);
+	std::cin.tie(NULL);
+
+	clearScreen();
+	findWindowSize();
+
 	float aspect = (float)width / height;
 	float pixelAspect = 11.0f / 24.0f;
-	char gradient[] = " .:!/r(l1Z4H9W8$@";
-	int gradientSize = std::size(gradient) - 2;
-
-	wchar_t* screen = new wchar_t[width * height];
-	HANDLE hConsole = CreateConsoleScreenBuffer(GENERIC_READ | GENERIC_WRITE, 0, NULL, CONSOLE_TEXTMODE_BUFFER, NULL);
-	SetConsoleActiveScreenBuffer(hConsole);
-	DWORD dwBytesWritten = 0;
+	std::string gradient = " .:!/r(l1Z4H9W8$@";
+	int gradientSize = gradient.size() - 1;
 
+	std::string str(width, ' ');
+	std::vector <std::string> screen(height, str);
+
 	for (int t = 0; t < 10000; t++) {
 		vec3 light = norm(vec3(-0.5, 0.5, -1.0));
 		vec3 spherePos = vec3(0, 3, 0);
@@ -79,10 +68,15 @@ int main() {
 				int color = (int)(diff * 20);
 				color = clamp(color, 0, gradientSize);
 				char pixel = gradient[color];
-				screen[i + j * width] = pixel;
+				screen[j][i] = pixel;
 			}
 		}
-		screen[width * height - 1] = '\0';
-		WriteConsoleOutputCharacter(hConsole, screen, width * height, { 0, 0 }, &dwBytesWritten);
+
+		for (int i = 0; i < height; i++) {
+			std::cout << screen[i] << "\n";
+		}
+		std::cout.flush();
+		gotoxy(0,0);
+
 	}
-}
+}

platforms.cpp

@@ -0,0 +1,49 @@
+#include <iostream>
+
+int width = 120 * 2, height = 30 * 2;
+
+#if defined(_WIN32) || defined(_WIN64)
+
+// Windows
+#include <windows.h>
+int findWindowSize() {
+	CONSOLE_SCREEN_BUFFER_INFO csbi;
+
+	GetConsoleScreenBufferInfo(GetStdHandle(STD_OUTPUT_HANDLE), &csbi);
+	width = csbi.srWindow.Right - csbi.srWindow.Left;
+	height = csbi.srWindow.Bottom - csbi.srWindow.Top;
+}
+
+void gotoxy(int x, int y) {
+	COORD p = { x, y };
+	SetConsoleCursorPosition(GetStdHandle(STD_OUTPUT_HANDLE), p);
+}
+
+void clearScreen() {
+	system("cls");
+}
+
+#else
+
+// *nix
+#include <sys/ioctl.h>
+#include <unistd.h>
+
+void findWindowSize() {
+	struct winsize w;
+	ioctl(STDOUT_FILENO, TIOCGWINSZ, &w);
+	height = w.ws_row - 1;
+	width = w.ws_col;
+}
+
+void gotoxy(int x, int y) {
+	x++; y++;
+	std::cout << "\033[" << y << ";" << x << "f";
+}
+
+void clearScreen() {
+	std::cout << "\033[2J";
+	gotoxy(0,0);
+}
+
+#endif