1 files changed, 44 insertions, 0 deletions
diff --git a/src/crepe/system/AnimatorSystem.cpp b/src/crepe/system/AnimatorSystem.cpp
new file mode 100644
index 0000000..143d5d6
--- /dev/null
+++ b/src/crepe/system/AnimatorSystem.cpp
@@ -0,0 +1,44 @@
+#include <chrono>
+
+#include "../api/Animator.h"
+#include "../manager/ComponentManager.h"
+#include "../manager/LoopTimerManager.h"
+
+#include "AnimatorSystem.h"
+
+using namespace crepe;
+using namespace std::chrono;
+
+void AnimatorSystem::frame_update() {
+	ComponentManager & mgr = this->mediator.component_manager;
+	LoopTimerManager & timer = this->mediator.loop_timer;
+	RefVector<Animator> animations = mgr.get_components_by_type<Animator>();
+
+	duration_t elapsed_time = timer.get_delta_time();
+
+	for (Animator & a : animations) {
+		if (!a.active) continue;
+		if (a.data.fps == 0) continue;
+
+		Animator::Data & ctx = a.data;
+
+		a.elapsed_time += elapsed_time;
+		duration_t frame_duration = 1000ms / ctx.fps;
+
+		int cycle_end = (ctx.cycle_end == -1) ? a.grid_size.x : ctx.cycle_end;
+		if (a.elapsed_time >= frame_duration) {
+			a.elapsed_time = 0ms;
+			a.frame++;
+			if (a.frame == cycle_end) {
+				a.frame = ctx.cycle_start;
+				if (!ctx.looping) {
+					a.active = false;
+					continue;
+				}
+			}
+		}
+
+		ctx.row = ctx.cycle_start + a.frame;
+		a.spritesheet.mask.x = ctx.row * a.spritesheet.mask.w;
+	}
+}