Magic_Game/core/actions/MoveBy.cpp

// Copyright (c) 2016-2018 Easy2D - Nomango
// 
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
// 
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

#include "..\e2daction.h"
#include "..\e2dobject.h"


e2d::MoveBy::MoveBy(float duration, Point vector)
	: FiniteTimeAction(duration)
{
	delta_pos_ = vector;
}

void e2d::MoveBy::Init()
{
	FiniteTimeAction::Init();

	if (target_)
	{
		prev_pos_ = start_pos_ = target_->GetPosition();
	}
}

void e2d::MoveBy::Update()
{
	FiniteTimeAction::Update();

	if (target_)
	{
		Point currentPos = target_->GetPosition();
		Point diff = currentPos - prev_pos_;
		start_pos_ = start_pos_ + diff;

		Point newPos = start_pos_ + (delta_pos_ * delta_);
		target_->SetPosition(newPos);

		prev_pos_ = newPos;
	}
}

e2d::MoveBy * e2d::MoveBy::Clone() const
{
	return new MoveBy(duration_, delta_pos_);
}

e2d::MoveBy * e2d::MoveBy::Reverse() const
{
	return new MoveBy(duration_, -delta_pos_);
}