Added input system

1 files changed, 89 insertions, 0 deletions

@@ -0,0 +1,89 @@
+#include "input_system.h"
+#include "game.h"
+#include "character_system.h"
+
+struct Input {
+  bool left = false;
+  bool right = false;
+  bool up = false;
+  bool down = false;
+};
+
+void InputSystem::tick(double dt) {
+  SDL_Event e;
+  while (SDL_PollEvent(&e)) {
+    if (e.type == SDL_QUIT || (e.type == SDL_KEYDOWN && e.key.keysym.sym == SDLK_ESCAPE)) {
+      game_.quit();
+
+      return;
+    } else if (e.type == SDL_KEYDOWN && (e.key.keysym.sym == SDLK_LSHIFT || e.key.keysym.sym == SDLK_RSHIFT)) {
+      for (int spriteId : game_.getSprites()) {
+        Sprite& sprite = game_.getSprite(spriteId);
+        if (sprite.controllable) {
+          game_.getSystem<CharacterSystem>().beginCrouch(spriteId);
+        }
+      }
+    } else if (e.type == SDL_KEYUP && (e.key.keysym.sym == SDLK_LSHIFT || e.key.keysym.sym == SDLK_RSHIFT)) {
+      for (int spriteId : game_.getSprites()) {
+        Sprite& sprite = game_.getSprite(spriteId);
+        if (sprite.controllable) {
+          game_.getSystem<CharacterSystem>().endCrouch(spriteId);
+        }
+      }
+    }
+  }
+
+  Input keystate;
+  const Uint8* state = SDL_GetKeyboardState(NULL);
+  keystate.left = state[SDL_SCANCODE_LEFT];
+  keystate.right = state[SDL_SCANCODE_RIGHT];
+  keystate.up = state[SDL_SCANCODE_UP];
+  keystate.down = state[SDL_SCANCODE_DOWN];
+
+  for (int spriteId : game_.getSprites()) {
+    Sprite& sprite = game_.getSprite(spriteId);
+
+    if (sprite.controllable) {
+      bool directed = false;
+      Direction dir = Direction::left;
+
+      if (keystate.up)
+      {
+        directed = true;
+        dir = Direction::up;
+      } else if (keystate.down)
+      {
+        directed = true;
+        dir = Direction::down;
+      }
+
+      if (keystate.left)
+      {
+        directed = true;
+        if (dir == Direction::up) {
+          dir = Direction::up_left;
+        } else if (dir == Direction::down) {
+          dir = Direction::down_left;
+        } else {
+          dir = Direction::left;
+        }
+      } else if (keystate.right)
+      {
+        directed = true;
+        if (dir == Direction::up) {
+          dir = Direction::up_right;
+        } else if (dir == Direction::down) {
+          dir = Direction::down_right;
+        } else {
+          dir = Direction::right;
+        }
+      }
+
+      if (directed) {
+        game_.getSystem<CharacterSystem>().moveInDirection(spriteId, dir);
+      } else {
+        game_.getSystem<CharacterSystem>().stopDirecting(spriteId);
+      }
+    }
+  }
+}