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///////////////////////////////////////////////////////////////////////////////////////////////////
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// Copyright 2021 Leszek Koltunski //
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// //
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// This file is part of Magic Cube. //
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// //
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// Magic Cube is free software: you can redistribute it and/or modify //
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// it under the terms of the GNU General Public License as published by //
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// the Free Software Foundation, either version 2 of the License, or //
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// (at your option) any later version. //
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// //
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// Magic Cube is distributed in the hope that it will be useful, //
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// but WITHOUT ANY WARRANTY; without even the implied warranty of //
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
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// GNU General Public License for more details. //
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// //
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// You should have received a copy of the GNU General Public License //
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// along with Magic Cube. If not, see <http://www.gnu.org/licenses/>. //
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///////////////////////////////////////////////////////////////////////////////////////////////////
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package org.distorted.objectlib.touchcontrol;
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import org.distorted.library.main.QuatHelper;
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import org.distorted.library.type.Static3D;
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import org.distorted.library.type.Static4D;
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import org.distorted.objectlib.main.TwistyObject;
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///////////////////////////////////////////////////////////////////////////////////////////////////
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public class TouchControlSquare extends TouchControlShapeChanging
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{
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private static final float NOT_TOUCHED = 100000.0f;
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private static final float DIST3D = 0.5f;
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private static final float DIST2D = 0.5f;
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private static final float[][] mCastedRotAxis = { {0,1,0,0}, {1,0,0,0} };
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private static final int[] mEnabled = {2,0,1};
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private final int mNumFaces;
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private final Static3D[] mFaceAxis;
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private final float[][] mTmp4;
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private final float[][] mTmp2;
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private final float[] mTmp2D, mMove2D;
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///////////////////////////////////////////////////////////////////////////////////////////////////
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public TouchControlSquare(TwistyObject object)
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{
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super(object);
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mNumFaces = object.getNumFaces();
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mFaceAxis = TouchControlHexahedron.FACE_AXIS;
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mTmp4 = new float[mNumFaces][4];
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mTmp2 = new float[mNumFaces][2];
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mTmp2D = new float[2];
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mMove2D= new float[2];
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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private boolean faceIsVisible(int index)
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{
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Static3D faceAxis = mFaceAxis[index];
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float castCameraOnAxis = mCamera[0]*faceAxis.get0() + mCamera[1]*faceAxis.get1() + mCamera[2]*faceAxis.get2();
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return castCameraOnAxis > DIST3D;
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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private boolean isInsideFace(float[] p)
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{
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return ( p[0]<=DIST2D && p[0]>=-DIST2D && p[1]<=DIST2D && p[1]>=-DIST2D );
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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private int figureOutTouchedFace()
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{
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for( int face=0; face<mNumFaces; face++)
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{
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if( faceIsVisible(face) )
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{
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float nx = mFaceAxis[face].get0();
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float ny = mFaceAxis[face].get1();
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float nz = mFaceAxis[face].get2();
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castTouchPointOntoFace(nx,ny,nz, DIST3D, mTmp4[face]);
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convertTo2Dcoords(mTmp4[face], nx,ny,nz, mTmp2[face]);
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if( isInsideFace(mTmp2[face]) ) return face;
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}
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else mTmp4[face][0] = NOT_TOUCHED;
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}
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float maxDist = 0.0f;
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int faceTouched=-1;
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for( int face=0; face<mNumFaces; face++)
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{
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float[] point = mTmp4[face];
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if( point[0] != NOT_TOUCHED )
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{
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float cx = point[0]-mCamera[0];
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float cy = point[1]-mCamera[1];
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float cz = point[2]-mCamera[2];
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float dist = cx*cx + cy*cy + cz*cz;
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if( dist>maxDist )
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{
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maxDist = dist;
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faceTouched = face;
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}
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}
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}
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return faceTouched;
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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// PUBLIC API
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///////////////////////////////////////////////////////////////////////////////////////////////////
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public void newRotation(int[] output, Static4D rotatedTouchPoint)
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{
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int rotIndex,face = figureOutTouchedFace();
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mPoint[0] = rotatedTouchPoint.get0()/mObjectRatio;
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mPoint[1] = rotatedTouchPoint.get1()/mObjectRatio;
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mPoint[2] = rotatedTouchPoint.get2()/mObjectRatio;
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float nx = mFaceAxis[face].get0();
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float ny = mFaceAxis[face].get1();
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float nz = mFaceAxis[face].get2();
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castTouchPointOntoFace(nx,ny,nz, DIST3D, mTmp);
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convertTo2Dcoords(mTmp, nx,ny,nz, mTmp2D);
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switch(face)
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{
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case 0: case 1: rotIndex = 0;
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break;
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case 2: case 3: rotIndex = 1;
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break;
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default : mMove2D[0] = mTmp2D[0]-mTmp2[face][0]; // mTmp2D contains an in-face-plane 2D 'new' point of touch;
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mMove2D[1] = mTmp2D[1]-mTmp2[face][1]; // mTmp2 contains such 'old' point. Old as in - at the time
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// of touchdown; 'new' as in - now, after moving the minimal
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// distance.
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rotIndex = computeRotationIndex( mCastedRotAxis, mMove2D, mEnabled);
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}
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output[0] = rotIndex;
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if( rotIndex==0 ) output[1] = mTmp2D[1]<0 ? 0:2;
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else output[1] = computeRow(mTouchedCubit,rotIndex);
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//android.util.Log.e("D", "face touched="+face+" rotIndex="+rotIndex+" row="+output[1]+" in-plane Y="+mTmp2D[1]);
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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public void getCastedRotAxis(float[] output, Static4D quat, int rotIndex)
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{
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float[] axis = mCastedRotAxis[rotIndex];
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Static4D result = QuatHelper.rotateVectorByQuat(axis[0],axis[1],axis[2],axis[3],quat);
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float cx =result.get0();
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float cy =result.get1();
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float len = (float)Math.sqrt(cx*cx+cy*cy);
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if( len!=0 )
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{
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output[0] = cx/len;
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output[1] = cy/len;
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}
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else
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{
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output[0] = 1;
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output[1] = 0;
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}
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}
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}
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