1 files changed, 40 insertions, 0 deletions
diff --git a/src/crepe/system/AnimatorSystem.cpp b/src/crepe/system/AnimatorSystem.cpp
new file mode 100644
index 0000000..e5ab2fa
--- /dev/null
+++ b/src/crepe/system/AnimatorSystem.cpp
@@ -0,0 +1,40 @@
+#include "../api/Animator.h"
+#include "../manager/ComponentManager.h"
+#include "../manager/LoopTimerManager.h"
+#include <chrono>
+
+#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>();
+
+	float elapsed_time = duration_cast<duration<float>>(timer.get_elapsed_time()).count();
+
+	for (Animator & a : animations) {
+		if (!a.active) continue;
+		if (a.data.fps == 0) continue;
+
+		Animator::Data & ctx = a.data;
+		float frame_duration = 1.0f / ctx.fps;
+
+		int last_frame = ctx.row;
+
+		int cycle_end = (ctx.cycle_end == -1) ? a.grid_size.x : ctx.cycle_end;
+		int total_frames = cycle_end - ctx.cycle_start;
+
+		int curr_frame = static_cast<int>(elapsed_time / frame_duration) % total_frames;
+
+		ctx.row = ctx.cycle_start + curr_frame;
+		a.spritesheet.mask.x = ctx.row * a.spritesheet.mask.w;
+		a.spritesheet.mask.y = (ctx.col * a.spritesheet.mask.h);
+
+		if (!ctx.looping && curr_frame == ctx.cycle_start && last_frame == total_frames - 1) {
+			a.active = false;
+		}
+	}
+}