urho3d/Source/Samples/10_RenderToTexture/Rotator.cpp

//
// Copyright (c) 2008-2013 the Urho3D project.
//
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// 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.
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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#include "Rotator.h"
#include "Scene.h"
#include "SceneEvents.h"

#include "DebugNew.h"

Rotator::Rotator(Context* context) :
    Component(context),
    rotationSpeed_(Vector3::ZERO)
{
}

void Rotator::SetRotationSpeed(const Vector3& speed)
{
    rotationSpeed_ = speed;
}

void Rotator::OnNodeSet(Node* node)
{
    // If the node pointer is nonzero, this component has been created into a scene node. Subscribe to the variable timestep
    // scene update event now. If the node pointer is zero, the component is being removed from a scene node at destruction
    // time. In that case we do nothing
    if (node)
    {
        Scene* scene = node->GetScene();
        // The scene pointer will be nonzero if the scene node belongs to a scene (it is also legal to create free-standing
        // scene nodes)
        if (scene)
            SubscribeToEvent(scene, E_SCENEUPDATE, HANDLER(Rotator, HandleSceneUpdate));
    }
}

void Rotator::HandleSceneUpdate(StringHash eventType, VariantMap& eventData)
{
    // Get the timestep from the update event
    using namespace SceneUpdate;
    float timeStep = eventData[P_TIMESTEP].GetFloat();
    
    // Components have their scene node as a member variable for convenient access. Rotate the scene node now: construct a
    // rotation quaternion from Euler angles, scale rotation speed with the scene update time step
    node_->Rotate(Quaternion(rotationSpeed_.x_ * timeStep, rotationSpeed_.y_ * timeStep, rotationSpeed_.z_ * timeStep));
}