Mostly working junk camera that can do turnbased lerp smooth motion.

main.cpp

@@ -7,6 +7,7 @@
 #include "stats.hpp"
 #include "levelmanager.hpp"
 #include "components.hpp"
+#include <numbers>
 
 using namespace components;
 
@@ -38,6 +39,100 @@ void draw_weapon(sf::RenderWindow &window, sf::Sprite &weapon, float rotation) {
   window.draw(weapon);
 }
 
+enum MoveState {
+  MOVE,
+  ROTATE,
+  STRAFE,
+  IDLE
+};
+
+struct CameraLOL {
+  double t = 0.0;
+  double moveSpeed = 0.1;
+  double rotSpeed = 0.1;
+  double targetX = 0.0;
+  double targetY = 0.0;
+  int targetDir = 0;
+  double targetDirX = 0.0;
+  double targetDirY = 0.0;
+  double targetPlaneX = 0.0;
+  double targetPlaneY = 0.0;
+
+  void plan_run(Raycaster &rayview, int dir) {
+    t = 0.0;
+    targetX = rayview.$posX + int(rayview.$dirX * 1.5 * dir);
+    targetY = rayview.$posY + int(rayview.$dirY * 1.5 * dir);
+    targetDir = dir;
+  }
+
+  bool lerp_run(Raycaster &rayview) {
+    t += moveSpeed;
+    rayview.$posX = std::lerp(rayview.$posX, targetX, t);
+    rayview.$posY = std::lerp(rayview.$posY, targetY, t);
+    return t >= 1.0;
+  }
+
+  void plan_rotate(Raycaster &rayview, int dir) {
+    t = 0.0;
+    double angle_dir = std::numbers::pi * 0.5 * dir;
+
+    targetDirX = rayview.$dirX * cos(angle_dir) - rayview.$dirY * sin(angle_dir);
+    targetDirY = rayview.$dirX * sin(angle_dir) + rayview.$dirY * cos(angle_dir);
+
+    targetPlaneX = rayview.$planeX * cos(angle_dir) - rayview.$planeY * sin(angle_dir);
+    targetPlaneY = rayview.$planeX * sin(angle_dir) + rayview.$planeY * cos(angle_dir);
+
+    targetDir = dir;
+  }
+
+  bool lerp_rotate(Raycaster &rayview) {
+    t += rotSpeed;
+    rayview.$dirX = std::lerp(rayview.$dirX, targetDirX, t);
+    rayview.$dirY = std::lerp(rayview.$dirY, targetDirY, t);
+    rayview.$planeX = std::lerp(rayview.$planeX, targetPlaneX, t);
+    rayview.$planeY = std::lerp(rayview.$planeY, targetPlaneY, t);
+
+    return t > 1.0;
+  }
+};
+
+
+inline void handle_window_events(sf::RenderWindow &window, Raycaster &rayview,
+    MoveState &state, CameraLOL &camera)
+{
+  while(const auto event = window.pollEvent()) {
+    if(event->is<sf::Event::Closed>()) {
+      window.close();
+    }
+
+    if(const auto* key = event->getIf<sf::Event::KeyPressed>()) {
+      if(key->scancode == sf::Keyboard::Scan::W) {
+        camera.plan_run(rayview, 1);
+        state = MOVE;
+      } else if(key->scancode == sf::Keyboard::Scan::S) {
+        camera.plan_run(rayview, -1);
+        state = MOVE;
+      }
+
+      if(key->scancode == sf::Keyboard::Scan::D) {
+        camera.plan_rotate(rayview, -1);
+        state = ROTATE;
+      } else if(key->scancode == sf::Keyboard::Scan::A) {
+        camera.plan_rotate(rayview, 1);
+        state = ROTATE;
+      }
+    }
+  }
+
+  if(sf::Keyboard::isKeyPressed(sf::Keyboard::Key::P)) {
+    if(rayview.$active_shader == nullptr) {
+      rayview.$active_shader = &rayview.$paused;
+    } else {
+      rayview.$active_shader = nullptr;
+    }
+  }
+}
+
 int main() {
   sf::RenderWindow window(sf::VideoMode({SCREEN_WIDTH, SCREEN_HEIGHT}), "Zed's Ray Caster Game Thing");
 
@@ -56,21 +151,18 @@ int main() {
 
   auto map = generate_map(textures, cur_level, player);
 
-  Point evil_eye_pos{player.x+1, player.y+1};
+  Point evil_eye_1, evil_eye_2;
+  dbc::check(cur_level.map->place_entity(1, evil_eye_1), "failed to place enemy 1");
+  dbc::check(cur_level.map->place_entity(2, evil_eye_2), "failed to place enemy 2");
 
   Raycaster rayview(window, textures, map, RAY_VIEW_WIDTH, RAY_VIEW_HEIGHT);
-  rayview.set_position(RAY_VIEW_X, RAY_VIEW_Y);
-  rayview.position_camera(player.x, player.y);
   rayview.init_shaders();
-  DinkyECS::Entity evil_ent = rayview.position_sprite(evil_eye_pos, "evil_eye");
 
-  double moveSpeed = 0.1;
-  double rotSpeed = 0.1;
+  rayview.set_position(RAY_VIEW_X, RAY_VIEW_Y);
+  rayview.position_camera(player.x + 0.5, player.y + 0.5);
 
-  const auto onClose = [&window](const sf::Event::Closed&)
-  {
-      window.close();
-  };
+  rayview.position_sprite(evil_eye_1, "evil_eye");
+  rayview.position_sprite(evil_eye_2, "evil_eye");
 
   float rotation = -30.0f;
   Stats stats;
@@ -78,8 +170,8 @@ int main() {
   window.setVerticalSyncEnabled(VSYNC);
   window.setFramerateLimit(FRAME_LIMIT);
 
-  double new_x = evil_eye_pos.x+0.1;
-  double new_y = evil_eye_pos.y+0.1;
+  MoveState state = IDLE;
+  CameraLOL camera;
 
   while(window.isOpen()) {
     auto start = std::chrono::high_resolution_clock::now();
@@ -93,45 +185,32 @@ int main() {
     draw_weapon(window, *weapon_sprite_ptr, rotation);
     window.display();
 
-    if(sf::Keyboard::isKeyPressed(sf::Keyboard::Key::W)) {
-      rayview.run(moveSpeed, 1);
-    } else if(sf::Keyboard::isKeyPressed(sf::Keyboard::Key::S)) {
-      rayview.run(moveSpeed, -1);
-    }
-
-    if(sf::Keyboard::isKeyPressed(sf::Keyboard::Key::D)) {
-      rayview.rotate(rotSpeed, -1);
-    } else if(sf::Keyboard::isKeyPressed(sf::Keyboard::Key::A)) {
-      rayview.rotate(rotSpeed, 1);
+    if(state == IDLE) {
+      handle_window_events(window, rayview, state, camera);
+    } else if(state == MOVE) {
+      if(camera.lerp_run(rayview)) {
+        state = IDLE;
+      }
+    } else if(state == ROTATE) {
+      if(camera.lerp_rotate(rayview)) {
+        state = IDLE;
+      }
+    } else if(state == STRAFE) {
+      state = IDLE;
+    } else {
+      dbc::sentinel("invalid move state.");
     }
 
     if(sf::Keyboard::isKeyPressed(sf::Keyboard::Key::R)) {
       stats.reset();
     }
 
-    if(sf::Keyboard::isKeyPressed(sf::Keyboard::Key::P)) {
-      if(rayview.$active_shader == nullptr) {
-        rayview.$active_shader = &rayview.$paused;
-      } else {
-        rayview.$active_shader = nullptr;
-      }
-    }
-
     if(sf::Mouse::isButtonPressed(sf::Mouse::Button::Left)) {
-      new_x += 0.1;
-      new_y += 0.1;
-      rayview.$collision.move(evil_eye_pos, {size_t(new_x), size_t(new_y)}, evil_ent);
-      evil_eye_pos = {size_t(new_x), size_t(new_y)};
-      rayview.$sprites[evil_ent].x = new_x;
-      rayview.$sprites[evil_ent].y = new_y;
-
       rayview.$anim.play(false);
       rotation = -30.0f;
     } else {
       rotation = -10.0f;
     }
-
-    window.handleEvents(onClose);
   }
 
   return 0;

raycaster.cpp

@@ -345,33 +345,9 @@ bool Raycaster::empty_space(int new_x, int new_y) {
   return $map[new_y][new_x] == 0;
 }
 
-
-void Raycaster::run(double speed, int dir) {
-  double speed_and_dir = speed * dir;
-  if(empty_space(int($posX + $dirX * speed_and_dir), int($posY))) {
-    $posX += $dirX * speed_and_dir;
-  }
-
-  if(empty_space(int($posX), int($posY + $dirY * speed_and_dir))) {
-      $posY += $dirY * speed_and_dir;
-  }
-}
-
-void Raycaster::rotate(double speed, int dir) {
-  double speed_and_dir = speed * dir;
-  double oldDirX = $dirX;
-  $dirX = $dirX * cos(speed_and_dir) - $dirY * sin(speed_and_dir);
-  $dirY = oldDirX * sin(speed_and_dir) + $dirY * cos(speed_and_dir);
-
-  double oldPlaneX = $planeX;
-  $planeX = $planeX * cos(speed_and_dir) - $planeY * sin(speed_and_dir);
-  $planeY = oldPlaneX * sin(speed_and_dir) + $planeY * cos(speed_and_dir);
-}
-
-
 DinkyECS::Entity Raycaster::position_sprite(Point pos, string name) {
   auto sprite_txt = $textures.sprite_textures[name];
-  $sprites.emplace_back(pos.x, pos.y, sprite_txt);
+  $sprites.emplace_back(pos.x + 0.5, pos.y + 0.5, sprite_txt);
   DinkyECS::Entity ent = $sprites.size() - 1;
   $collision.insert({pos.x, pos.y}, ent);
   return ent;

raycaster.hpp

@@ -60,9 +60,6 @@ struct Raycaster {
   void render();
 
   bool empty_space(int new_x, int new_y);
-
-  void run(double speed, int dir);
-  void rotate(double speed, int dir);
   void position_camera(float player_x, float player_y);
 
   void set_position(int x, int y);