Added camera system

1 files changed, 27 insertions, 0 deletions

@@ -0,0 +1,27 @@
+#include "camera_system.h"
+#include "sprite.h"
+#include "game.h"
+#include "map.h"
+
+void CameraSystem::tick(double dt) {
+  if (!locked_) {
+    const Sprite& follow = game_.getSprite(followingSprite_);
+    const Map& map = game_.getMap();
+    vec2i mapBounds = map.getMapSize() * map.getTileSize();
+
+    pos_ = follow.loc() - (fov_ / 2);
+
+    if (pos_.x() < 0) {
+      pos_.x() = 0;
+    }
+    if (pos_.y() < 0) {
+      pos_.y() = 0;
+    }
+    if (pos_.x() + fov_.w() >= mapBounds.w()) {
+      pos_.x() = mapBounds.w() - fov_.w() - 1;
+    }
+    if (pos_.y() + fov_.h() >= mapBounds.h()) {
+      pos_.y() = mapBounds.h() - fov_.h() - 1;
+    }
+  }
+}