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include/cinder/app/AccelEvent.h

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00001 /*
00002  Copyright (c) 2010, The Cinder Project: http://libcinder.org
00003  All rights reserved.
00004 
00005  Redistribution and use in source and binary forms, with or without modification, are permitted provided that
00006  the following conditions are met:
00007 
00008     * Redistributions of source code must retain the above copyright notice, this list of conditions and
00009     the following disclaimer.
00010     * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and
00011     the following disclaimer in the documentation and/or other materials provided with the distribution.
00012 
00013  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED
00014  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
00015  PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
00016  ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
00017  TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
00018  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
00019  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
00020  POSSIBILITY OF SUCH DAMAGE.
00021 */
00022 
00023 #pragma once
00024 
00025 #include "cinder/Cinder.h"
00026 #include "cinder/app/Event.h"
00027 #include "cinder/Vector.h"
00028 #include "cinder/Quaternion.h"
00029 
00030 namespace cinder { namespace app {
00031 
00033 class AccelEvent : public Event {
00034   public:
00035     AccelEvent( const Vec3f &data, const Vec3f &rawData, const Vec3f &prevData, const Vec3f &prevRawData )
00036         : Event(), mData( data ), mRawData( rawData ), mPrevData( prevData ), mPrevRawData( prevRawData )
00037     {
00038     }
00039     
00041     Vec3f   getData() const { return mData; }
00043     Vec3f   getRawData() const { return mRawData; }
00045     Vec3f   getPrevData() const { return mPrevData; }
00047     Vec3f   getPrevRawData() const { return mPrevRawData; }
00048 
00050     bool    isShake( float shakeDelta = 2.2f ) const
00051     { return (mRawData - mPrevRawData).lengthSquared() > shakeDelta * shakeDelta; }
00052     
00053     Vec2f getPolarPlaneVector() const // (r, theta), theta is in degrees
00054     { 
00055         float r = math<float>::sin( M_PI*(mData.z+1) / 2 );
00056         float theta = toDegrees( math<float>::asin( mData.y / math<float>::sqrt( mData.x*mData.x + mData.y*mData.y )) );
00057 
00058         if( mData.x < 0 ) {     
00059             theta = -theta + 180.0f;
00060         }
00061         else {
00062             if( mData.y < 0 ) {
00063                 theta = theta + 360.0f;
00064             }
00065         }
00066         
00067         return Vec2f( r, theta );           
00068     }
00069 
00070     Vec2f getPlaneVector() const
00071     {
00072         Vec2f v = getPolarPlaneVector();
00073         return Vec2f( -v.x * math<float>::cos( toRadians( v.y ) ), v.x * math<float>::sin( toRadians( v.y ) ) );
00074     }
00075 
00077     Matrix44f getMatrix() const
00078     {
00079         return Quatf( Vec3f( 0, -1, 0 ), mData.normalized() ).toMatrix44();
00080     }
00081     
00082   private:
00083     Vec3f       mData, mPrevData;
00084     Vec3f       mRawData, mPrevRawData;
00085 };
00086 
00087 // For convenience only
00088 inline std::ostream& operator<<( std::ostream &out, const AccelEvent &event )
00089 {
00090     out << event.getData() << " raw: " << event.getRawData();
00091     return out;
00092 }
00093 
00094 
00095 } } // namespace cinder::app