Made a terrible animation sprite and then did a quick animation test. Won't keep it for now but this shows how it could work.

assets/config.json

@@ -1,7 +1,7 @@
 {
   "textures": [
-    "assets/floor_tile_test-256.png",
     "assets/wall_texture_test-256.png",
+    "assets/floor_tile_test-256.png",
     "assets/ceiling_test-256.png",
     "assets/wood_wall-256.png"
   ],

constants.hpp

@@ -8,7 +8,7 @@ constexpr const int RAY_VIEW_X=(1280 - RAY_VIEW_WIDTH);
 constexpr const int RAY_VIEW_Y=0;
 constexpr const int SCREEN_HEIGHT=720;
 constexpr const int SCREEN_WIDTH=1280;
-constexpr const bool VSYNC=true;
+constexpr const bool VSYNC=false;
 constexpr const int FRAME_LIMIT=60;
 #ifdef NDEBUG
 constexpr const bool DEBUG_BUILD=false;

raycaster.cpp

@@ -148,7 +148,9 @@ void Raycaster::sprite_casting() {
       int texY = ((d * textureHeight) / spriteHeight) / textureHeight;
 
       sf_sprite->setScale({sprite_w, sprite_h});
-      sf_sprite->setTextureRect(sf::IntRect({texX, texY}, {texX_end - texX, textureHeight}));
+      auto time = $clock.getElapsedTime();
+      int frame = int(time.asMicroseconds() / 200.0) % 4;
+      sf_sprite->setTextureRect(sf::IntRect({texX + (textureWidth * frame), texY}, {texX_end - texX, textureHeight}));
       sf_sprite->setPosition({x, y});
       $window.draw(*sf_sprite);
     }

raycaster.hpp

@@ -11,12 +11,14 @@
 #include "dbc.hpp"
 #include <memory>
 #include "texture.hpp"
+#include <SFML/System/Clock.hpp>
 
 using matrix::Matrix;
 using RGBA = uint32_t;
 
 struct Raycaster {
   int $pitch=0;
+  sf::Clock $clock;
 
   TexturePack $textures;
   double $posX = 0;

texture.cpp

@@ -14,6 +14,7 @@ sf::Image TexturePack::load_image(std::string filename) {
 
 void TexturePack::load_textures() {
   Config assets("assets/config.json");
+
   for(string tile_path : assets["textures"]) {
     images.emplace_back(load_image(tile_path));
   }
@@ -25,7 +26,7 @@ void TexturePack::load_textures() {
   floor = load_image(assets["floor"]);
   ceiling = load_image(assets["ceiling"]);
 
-  sf::Texture* sprite_texture = new sf::Texture("assets/evil_eye_test-256.png");
+  sf::Texture* sprite_texture = new sf::Texture("assets/undead_peasant-spritesheet.png");
   sprite_texture->setSmooth(false);
   sf::Sprite* sf_sprite = new sf::Sprite(*sprite_texture);
   sprites.push_back({4.0, 3.55, 6, sf_sprite, sprite_texture});