Small tweak to allow changing the map, and then added a hirdrac suggestion to vsync.

raycaster.cpp

@@ -8,9 +8,21 @@
 using matrix::Matrix;
 using namespace fmt;
 
+Matrix MAP{
+  {1,1,1,1,1,1,1,1,1},
+  {1,0,1,0,0,0,0,0,1},
+  {1,0,1,0,0,1,1,0,1},
+  {1,0,0,0,0,0,0,0,1},
+  {1,1,0,0,0,0,0,0,1},
+  {1,0,0,1,1,1,0,0,1},
+  {1,0,0,0,1,0,0,0,1},
+  {1,0,0,0,0,0,1,1,1},
+  {1,1,1,1,1,1,1,1,1}
+};
+
 const int SCREEN_HEIGHT=480;
 const int SCREEN_WIDTH=SCREEN_HEIGHT * 2;
-const int MAP_SIZE=8;
+const int MAP_SIZE=matrix::width(MAP);
 const int TILE_SIZE=(SCREEN_WIDTH/2) / MAP_SIZE;
 const float FOV = std::numbers::pi / 3.0;
 const float HALF_FOV = FOV / 2;
@@ -19,17 +31,6 @@ const float STEP_ANGLE = FOV / CASTED_RAYS;
 const int MAX_DEPTH = MAP_SIZE * TILE_SIZE;
 const float SCALE = (SCREEN_WIDTH / 2) / CASTED_RAYS;
 
-Matrix MAP{
-  {1,1,1,1,1,1,1,1},
-  {1,0,1,0,0,0,0,1},
-  {1,0,1,0,0,1,1,1},
-  {1,0,0,0,0,0,0,1},
-  {1,1,0,0,0,0,0,1},
-  {1,0,0,1,1,1,0,1},
-  {1,0,0,0,1,0,0,1},
-  {1,1,1,1,1,1,1,1}
-};
-
 float player_x = SCREEN_WIDTH / 4;
 float player_y = SCREEN_WIDTH / 4;
 float player_angle = std::numbers::pi;
@@ -44,7 +45,7 @@ void draw_rect(sf::RenderWindow &window, sf::Vector2f pos, sf::Vector2f size, ui
 void draw_map_rect(sf::RenderWindow &window, int x, int y, uint8_t color) {
   draw_rect(window,
       {float(x * TILE_SIZE), float(y * TILE_SIZE)},
-      {TILE_SIZE-1, TILE_SIZE-1},
+      {float(TILE_SIZE-1), float(TILE_SIZE-1)},
       color);
 }
 
@@ -107,6 +108,7 @@ void ray_casting(sf::RenderWindow &window, Matrix& map) {
 
 int main() {
   sf::RenderWindow window(sf::VideoMode(SCREEN_WIDTH, SCREEN_HEIGHT), "Raycaster");
+  window.setVerticalSyncEnabled(true);
 
   while(window.isOpen()) {
     sf::Event event;
@@ -125,7 +127,6 @@ int main() {
 
     ray_casting(window, MAP);
 
-
     window.display();
 
     while(window.pollEvent(event)) {