90 lines
2.6 KiB
C++
90 lines
2.6 KiB
C++
// Copyright (c) 2016-2018 Kiwano - Nomango
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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#include <kiwano/2d/Actor.h>
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#include <kiwano/2d/action/ActionWalk.h>
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namespace kiwano
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{
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ActionWalkPtr ActionWalk::Create(Duration duration, ShapePtr path, bool rotating, float start, float end)
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{
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ActionWalkPtr ptr = new (std::nothrow) ActionWalk;
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if (ptr)
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{
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ptr->SetDuration(duration);
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ptr->SetPath(path);
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ptr->SetRotating(rotating);
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ptr->SetStartValue(start);
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ptr->SetEndValue(end);
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}
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return ptr;
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}
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ActionWalk::ActionWalk()
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: start_(0.0f)
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, end_(1.0f)
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, rotating_(false)
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, length_(0.f)
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{
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}
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ActionPtr ActionWalk::Clone() const
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{
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return ActionWalk::Create(GetDuration(), path_, rotating_, start_, end_);
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}
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ActionPtr ActionWalk::Reverse() const
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{
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return ActionWalk::Create(GetDuration(), path_, rotating_, end_, start_);
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}
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void ActionWalk::Init(Actor* target)
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{
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if (!path_ || !path_->IsValid())
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{
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Done();
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return;
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}
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start_pos_ = target->GetPosition();
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length_ = path_->GetLength();
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}
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void ActionWalk::UpdateTween(Actor* target, float percent)
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{
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float distance = length_ * std::min(std::max((end_ - start_) * percent + start_, 0.f), 1.f);
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Point point, tangent;
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if (path_->ComputePointAtLength(distance, point, tangent))
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{
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target->SetPosition(start_pos_ + point);
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if (rotating_)
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{
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float ac = math::Acos(tangent.x);
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float rotation = (tangent.y < 0.f) ? 360.f - ac : ac;
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target->SetRotation(rotation);
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}
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}
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}
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} // namespace kiwano
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