src/crepe/system/AnimatorSystem.cpp


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#include <cstdint>
#include <functional>
#include <vector>

#include "api/Animator.h"
#include "facade/SDLContext.h"

#include "AnimatorSystem.h"
#include "ComponentManager.h"

using namespace crepe;

void AnimatorSystem::update() {
	ComponentManager & mgr = this->component_manager;

	std::vector<std::reference_wrapper<Animator>> animations
		= mgr.get_components_by_type<Animator>();

	uint64_t tick = SDLContext::get_instance().get_ticks();
	for (Animator & a : animations) {
		if (a.active) {
			// (10 frames per second)
			a.curr_row = (tick / 100) % a.row;
			a.animator_rect.x = (a.curr_row * a.animator_rect.w) + a.curr_col;
			a.spritesheet.sprite_rect = a.animator_rect;
		}
	}
}