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+//-----------------------------------------------------------------------------
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+// Copyright (c) 2013 GarageGames, LLC
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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
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+// deal in the Software without restriction, including without limitation the
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+// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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+// sell 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
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+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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+// IN THE SOFTWARE.
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+//-----------------------------------------------------------------------------
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+
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+#ifndef _ATTRACTOR_CONTROLLER_H_
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+#include "2d/controllers/AttractorController.h"
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+#endif
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+
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+// Script bindings.
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+#include "AttractorController_ScriptBinding.h"
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+
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+//------------------------------------------------------------------------------
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+
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+IMPLEMENT_CONOBJECT(AttractorController);
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+
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+//------------------------------------------------------------------------------
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+
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+AttractorController::AttractorController()
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+{
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+ // Reset he controller.
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+ mPosition.SetZero();
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+ mRadius = 1.0f;
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+ mForce = 0.0f;
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+}
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+
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+//------------------------------------------------------------------------------
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+
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+AttractorController::~AttractorController()
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+{
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+}
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+
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+
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+//------------------------------------------------------------------------------
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+
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+void AttractorController::initPersistFields()
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+{
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+ // Call parent.
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+ Parent::initPersistFields();
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+
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+ // Force.
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+ addProtectedField("Position", TypeVector2, Offset( mPosition, AttractorController), &defaultProtectedSetFn, &defaultProtectedGetFn, "The position of the attractor controller.");
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+ addProtectedField("Radius", TypeVector2, Offset( mRadius, AttractorController), &defaultProtectedSetFn, &defaultProtectedGetFn, "The radius of the attractor circle centered on the attractors position.");
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+ addProtectedField("Force", TypeF32, Offset( mForce, AttractorController), &defaultProtectedSetFn, &defaultProtectedGetFn, "The force to apply to attact to the controller position.");
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+}
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+
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+//------------------------------------------------------------------------------
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+
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+void AttractorController::copyTo(SimObject* object)
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+{
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+ // Call to parent.
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+ Parent::copyTo(object);
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+
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+ // Cast to controller.
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+ AttractorController* pController = static_cast<AttractorController*>(object);
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+
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+ // Sanity!
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+ AssertFatal(pController != NULL, "AttractorController::copyTo() - Object is not the correct type.");
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+
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+ // Copy state.
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+ pController->setForce( getForce() );
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+}
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+
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+//------------------------------------------------------------------------------
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+
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+void AttractorController::integrate( Scene* pScene, const F32 totalTime, const F32 elapsedTime, DebugStats* pDebugStats )
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+{
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+ // Finish if the attractor would have no effect.
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+ if ( mIsZero( mForce ) || mIsZero( mRadius ) )
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+ return;
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+
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+ // Fetch world query and clear results.
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+ WorldQuery* pWorldQuery = pScene->getWorldQuery( true );
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+
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+ // Set filter.
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+ WorldQueryFilter queryFilter( 0xFFFFFFFF, 0xFFFFFFFF, true, false, true, true );
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+ pWorldQuery->setQueryFilter( queryFilter );
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+
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+ // Calculate the AABB of the attractor.
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+ b2AABB aabb;
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+ aabb.lowerBound.Set( mPosition.x - mRadius, mPosition.y - mRadius );
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+ aabb.lowerBound.Set( mPosition.x + mRadius, mPosition.y + mRadius );
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+
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+ // Query for candidate objects.
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+ pWorldQuery->anyQueryArea( aabb );
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+
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+ // Fetch results.
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+ typeWorldQueryResultVector& queryResults = pWorldQuery->getQueryResults();
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+
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+ // Add picked objects.
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+ for ( U32 n = 0; n < (U32)queryResults.size(); n++ )
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+ {
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+ // Fetch the scene object.
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+ SceneObject* pSceneObject = queryResults[n].mpSceneObject;
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+
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+ // Ignore if it's a static body.
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+ if ( pSceneObject->getBodyType() == b2BodyType::b2_staticBody )
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+ continue;
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+
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+ // Calculate the force direction to the controllers position.
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+ Vector2 forceDirection = mPosition - pSceneObject->getPosition();
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+
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+ // Normalize to the specified force.
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+ forceDirection.Normalize( mForce );
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+
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+ // Apply the force.
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+ pSceneObject->applyForce( forceDirection, true );
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+ }
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+}
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MelvMay-GG