O3dThingComponent.cpp

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/*
SagaEngine library
Copyright (c) 2002-2006 Skalden Studio AS

This software is provided 'as-is', without any express or implied 
warranty. In no event will the authors be held liable for any 
damages arising from the use of this software.

Permission is granted to distribute the library under the terms of the 
Q Public License version 1.0. Be sure to read and understand the license
before using the library. It should be included here, or you may read it
at http://www.trolltech.com/products/qt/licenses/licensing/qpl

The original version of this library can be located at:
http://www.sagaengine.com/

Rune Myrland
rune@skalden.com
*/


#include "O3dThingComponent.hpp"
#include "../schema/O3dSchema.hpp"
#include "ThingMO.hpp"
#include "MultiO3dThingComponent.hpp"
#include "util/math/ScaleT.hpp"
#include "util/task/TaskList.hpp"
#include <OgreSceneManager.h>

using namespace se_core;
using namespace se_client;

namespace se_ogre {

    O3dThingComponent
    ::O3dThingComponent(Composite* owner, const se_core::ComponentFactory* factory)
            : O3dNodeComponent(sct_RENDER, owner, factory), Task(2, 8), parentNode_(0), isVisible_(false)
            , isInitialized_(false)
            , size_(0) {
    }


    O3dThingComponent
    ::~O3dThingComponent() {
        Assert(!isInitialized_);
    }


    void O3dThingComponent
	::init() {
        if(isInitialized_)
            return;
        isInitialized_ = true;

        if(!node_) {
            node_ = O3dSchema::sceneManager->createSceneNode();
        }

        if(!parentNode_) {
            const PosComponent* a = PosComponent::Ptr(*this)->pos().area();
            if(!a) {
                LogFatal("!");
                return;
            }
            Assert(a);
            O3dNodeComponent::Ptr c(*a);
            Assert(!c.isNull());
            Assert(c->node());
            setParentNode(c->node());
        }

        O3dSchema::thingMOManager.create(this);
    }

    void O3dThingComponent
	::cleanup() {
        clear();
        O3dSchema::taskList.remove(*this);
    }


    void O3dThingComponent
    ::clear() {
        if(!isInitialized_)
            return;
        isInitialized_ = false;

        resetParentNode();

        while(!moList_.isEmpty()) {
            ThingMO* te = &moList_.pop();
            O3dSchema::thingMOManager.release(te);
        }
        size_ = 0;

        if(O3dSchema::sceneManager) {
            node_->removeAndDestroyAllChildren();
            O3dSchema::sceneManager->destroySceneNode(node_->getName());
        }
        node_ = 0;

    }

    void O3dThingComponent
    ::perform() {
        if(!isActive() || isDead())
            return;
        init();
        if(parentNode_ != 0)
            setVisible(true);
    }


    void O3dThingComponent
    ::setActive(bool state) {
        if(state) {
            if(ClientSchema::player->nextPos().area() == PosComponent::get(*this)->nextPos().area()) {
                this->setPriority(1);
                this->setWeight(0);
            }
            else {
                this->setPriority(5);
                this->setWeight(2);
            }
            O3dSchema::taskList.add(*this);
        }
        else {
            O3dSchema::taskList.remove(*this);
            setVisible(false);
            clear();
        }
    }


    void O3dThingComponent
    ::setVisible(bool state) {
        if(isVisible_ == state)
            return;

        isVisible_ = state;
        if(isVisible_) {
            O3dNodeComponent* c = static_cast<O3dNodeComponent*>(parent_);
            setParentNode(c->node());
            parentNode_->addChild(node_);
        } 
        else {
            parentNode_->removeChild(node_);
            resetParentNode();
        }
    }


    void O3dThingComponent
    ::move(long when, float stepDelta, float timeSinceLastFrame) {
        // Are interpolations meaningful at all?
        if(owner() == 0)
            return;

        if(!isInitialized_)
            return;

        PosComponent::Ptr tPos(*this);
        /*
        if(isDead() || !isActive() || !tPos->pos().isKeyFramePath(tPos->nextPos())) {
            // If not skip it
            setVisible(false);
            return;
        }
        */

        setVisible(true);
        ViewPoint next;
        const scale_t alpha = ScaleT::fromFloat(stepDelta);
        tPos->worldViewPoint(alpha, next);

        if(!next.viewPointEquals(last_)) {
            last_.setViewPoint(next);
            Ogre::Vector3 pos(
                    CoorT::toFloat(last_.coor_.x_),
                    CoorT::toFloat(last_.coor_.y_),
                    CoorT::toFloat(last_.coor_.z_)
                    );

            // Translate from Euler3 if necessary
            Quat4 face(next.face_);
            Ogre::Quaternion rot(
                    QuatT::toFloat(face.w_),
                    QuatT::toFloat(face.x_),
                    QuatT::toFloat(face.y_),
                    QuatT::toFloat(face.z_)
                    );


            // Set the new position
            node_->setPosition(pos - parentNode_->getPosition());

            // Set new orientation
            node_->setOrientation(rot);

        }
        // Move children
        ThingMOList::Iterator it(moList_);
        while(it.hasNext()) {
            ThingMO* te = &it.next();
            te->move(when, stepDelta, timeSinceLastFrame);
            te->resetPos();
        }
    }


    void O3dThingComponent
    ::add(ThingMO& tmo) {
        //LogDetail(tmo.name());
        int s = moList_.size();
        moList_.add(tmo);
        ++size_;
        Assert(moList_.size() == size_);
        Assert(size_ == s + 1);
        tmo.setParentNode(node_);
    }


    void O3dThingComponent
    ::remove(ThingMO& tmo) {
        moList_.remove(tmo);
        --size_;
    }


    void O3dThingComponent
    ::setParentNode(Ogre::SceneNode* sn) {
        if(sn == parentNode_)
            return;
        if(!isInitialized_)
            return;

        if(parentNode_) {
            if(isVisible_)
                parentNode_->removeChild(node_);
            node_->setPosition(node_->getPosition() + parentNode_->getPosition());
        }
        parentNode_ = sn;
        node_->setPosition(node_->getPosition() - parentNode_->getPosition());

        if(isVisible_)
            parentNode_->addChild(node_);
    }


    void O3dThingComponent
    ::resetParentNode() {
        if(0 == parentNode_)
            return;
        if(!isInitialized_)
            return;

        if(isVisible_)
            parentNode_->removeChild(node_);
        node_->setPosition(node_->getPosition() + parentNode_->getPosition());

        parentNode_ = 0;
        last_.setIdentity();
    }


    void O3dThingComponent
    ::zoneChanged(int zoneType, Composite* newArea, Composite* oldArea) {
        if(zoneType != st_AREA)
            return;

        if(newArea) {
            O3dNodeComponent* c = static_cast<O3dNodeComponent*>(newArea->component(type()));
            setParent(*c);
            setParentNode(c->node());
        }
        else {
            setVisible(false);
            resetParent();
            resetParentNode();
        }
    }

}

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