Add basic camera representation

camera.cpp

@@ -0,0 +1,31 @@
+#include "camera.h"
+#include <cmath>
+
+#include <SFML/Graphics/Color.hpp>
+
+#define PI 3.14159265
+
+static void drawLine(sf::RenderWindow* window, sf::Vector2f pos, float angle, float length, sf::Color color);
+
+void camera_update(Camera* camera, sf::RenderWindow* window)
+{
+	if (!camera || !window) return; 
+
+	drawLine(window, camera->pos, camera->direction, 100, sf::Color::Red);
+}
+
+static void drawLine(sf::RenderWindow* window, sf::Vector2f pos, float angle, float length, sf::Color color)
+{
+	if (!window) return;
+
+	sf::Vector2f endOffset(length * cos(angle * PI/180.f), length * sin(angle * PI/180.3));
+	sf::Vertex start(pos);
+	sf::Vertex end(pos + endOffset);
+
+	start.color = color;
+	end.color = color;
+
+	sf::Vertex line[] = { start, end };
+
+	window->draw(line, 2, sf::Lines);
+}

camera.h

@@ -0,0 +1,17 @@
+#ifndef CAMERA_H
+#define CAMERA_H
+
+#include <SFML/Graphics/RenderWindow.hpp>
+#include <SFML/System/Vector2.hpp>
+
+typedef struct
+{
+	sf::Vector2f pos;
+	float direction;
+	float resolution;
+	float fov;
+} Camera;
+
+void camera_update(Camera* camera, sf::RenderWindow* window);
+
+#endif

view.cpp

@@ -3,12 +3,15 @@
 #include <stdio.h>
 
 #include "level.h"
+#include "camera.h"
 
 static int handleKeyCode(sf::Keyboard::Key key);
 
 static sf::Uint32 style = sf::Style::Titlebar;
 static sf::RenderWindow window(sf::VideoMode(500, 500), "Raycasting", style);
 
+static Camera camera = { sf::Vector2f(300.f, 250.f), 0.f, 1.f, 70.f };
+
 int view_init()
 {
 	printf("view_init()\n");
@@ -35,6 +38,7 @@ int view_update()
 
 	window.clear();
 	if (!level_update()) return 0;
+	camera_update(&camera, &window);
 	window.display();
 
 	return 1;