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///////////////////////////////////////////////////////////////////////////////////////////////////
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// Copyright 2019 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.main;
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import android.app.ActivityManager;
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import android.content.Context;
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import android.content.pm.ConfigurationInfo;
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import android.opengl.GLSurfaceView;
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import android.util.AttributeSet;
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import android.util.DisplayMetrics;
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import android.view.MotionEvent;
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import org.distorted.library.type.Static2D;
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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.objects.RubikObject;
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import org.distorted.objects.RubikObjectMovement;
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import org.distorted.solvers.SolverMain;
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import org.distorted.states.RubikState;
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import org.distorted.states.RubikStateSolver;
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import org.distorted.states.RubikStateSolving;
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///////////////////////////////////////////////////////////////////////////////////////////////////
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public class RubikSurfaceView extends GLSurfaceView
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{
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private static final int NUM_SPEED_PROBES = 10;
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public static final int MODE_ROTATE = 0;
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public static final int MODE_DRAG = 1;
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public static final int MODE_REPLACE = 2;
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// Moving the finger from the middle of the vertical screen to the right edge will rotate a
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// given face by SWIPING_SENSITIVITY/2 degrees.
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private final static int SWIPING_SENSITIVITY = 240;
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// Moving the finger by 0.33 of an inch will start a Rotation.
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private final static float ROTATION_SENSITIVITY = 0.33f;
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// Every 0.33 of an inch the direction of cube drag will reset.
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private final static float DIRECTION_SENSITIVITY= 0.33f;
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// Where did we get this sqrt(3)/2 ? From the (default, i.e. 60 degrees - see InternalOutputSurface!)
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// FOV of the projection matrix of the Node onto the Screen.
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// Take a look how the CAMERA_POINT is used in onTouchEvent - (x,y) there are expressed in sort of
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// 'half-NDC' coordinates i.e. they range from +0.5 to -0.5; thus CAMERA_POINT also needs to be
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// in 'half-NDC'. Since in this coordinate system the height of the screen is equal to 1, then the
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// Z-distance from the center of the object to the camera is equal to (scrHeight/2)/tan(FOV/2) =
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// 0.5/tan(30) = sqrt(3)/2.
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// Why is the Z-distance between the camera and the object equal to (scrHeight/2)/tan(FOV/2)?
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// Because of the way the View part of the ModelView matrix is constructed in EffectQueueMatrix.send().
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private final Static4D CAMERA_POINT = new Static4D(0, 0, (float)Math.sqrt(3)*0.5f, 0);
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private RubikRenderer mRenderer;
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private RubikPreRender mPreRender;
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private RubikObjectMovement mMovement;
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private boolean mDragging, mBeginningRotation, mContinuingRotation;
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private int mScreenWidth, mScreenHeight, mScreenMin;
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private float mX, mY;
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private float mStartRotX, mStartRotY;
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private float mAxisX, mAxisY;
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private float mRotationFactor;
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private int mLastCubitColor, mLastCubitFace, mLastCubit;
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private int mCurrentAxis, mCurrentRow;
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private float mCurrentAngle, mCurrRotSpeed;
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private float[] mLastX;
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private float[] mLastY;
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private long[] mLastT;
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private int mFirstIndex, mLastIndex;
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private int mDensity;
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private static Static4D mQuatCurrent = new Static4D(0,0,0,1);
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private static Static4D mQuatAccumulated= new Static4D(-0.25189602f,0.3546389f,0.009657208f,0.90038127f);
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private static Static4D mTempCurrent = new Static4D(0,0,0,1);
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private static Static4D mTempAccumulated= new Static4D(0,0,0,1);
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///////////////////////////////////////////////////////////////////////////////////////////////////
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void setScreenSize(int width, int height)
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{
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mScreenWidth = width;
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mScreenHeight= height;
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mScreenMin = Math.min(width, height);
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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boolean isVertical()
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{
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return mScreenHeight>mScreenWidth;
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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RubikRenderer getRenderer()
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{
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return mRenderer;
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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RubikPreRender getPreRender()
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{
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return mPreRender;
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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void setQuatAccumulated()
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{
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mQuatAccumulated.set(mTempAccumulated);
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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void setQuatCurrent()
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{
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mQuatCurrent.set(mTempCurrent);
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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Static4D getQuatAccumulated()
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{
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return mQuatAccumulated;
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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Static4D getQuatCurrent()
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{
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return mQuatCurrent;
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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void setMovement(RubikObjectMovement movement)
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{
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mMovement = movement;
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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private Static4D quatFromDrag(float dragX, float dragY)
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{
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float axisX = dragY; // inverted X and Y - rotation axis is perpendicular to (dragX,dragY)
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float axisY = dragX; // Why not (-dragY, dragX) ? because Y axis is also inverted!
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float axisZ = 0;
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float axisL = (float)Math.sqrt(axisX*axisX + axisY*axisY + axisZ*axisZ);
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if( axisL>0 )
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{
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axisX /= axisL;
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axisY /= axisL;
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axisZ /= axisL;
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float ratio = axisL;
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ratio = ratio - (int)ratio; // the cos() is only valid in (0,Pi)
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float cosA = (float)Math.cos(Math.PI*ratio);
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float sinA = (float)Math.sqrt(1-cosA*cosA);
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return new Static4D(axisX*sinA, axisY*sinA, axisZ*sinA, cosA);
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}
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return new Static4D(0f, 0f, 0f, 1f);
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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// cast the 3D axis we are currently rotating along to the 2D in-screen-surface axis
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private void computeCurrentAxis(Static3D axis)
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{
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Static4D axis4D = new Static4D(axis.get0(), axis.get1(), axis.get2(), 0);
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Static4D result = rotateVectorByQuat(axis4D, mQuatAccumulated);
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mAxisX =result.get0();
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mAxisY =result.get1();
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float len = (float)Math.sqrt(mAxisX*mAxisX + mAxisY*mAxisY);
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mAxisX /= len;
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mAxisY /= len;
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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private float continueRotation(float dx, float dy)
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{
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float alpha = dx*mAxisX + dy*mAxisY;
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float x = dx - alpha*mAxisX;
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float y = dy - alpha*mAxisY;
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float len = (float)Math.sqrt(x*x + y*y);
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// we have the length of 1D vector 'angle', now the direction:
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float tmp = mAxisY==0 ? -mAxisX*y : mAxisY*x;
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return (tmp>0 ? 1:-1)*len*mRotationFactor;
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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// return quat1*quat2
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public static Static4D quatMultiply( Static4D quat1, Static4D quat2 )
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{
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float qx = quat1.get0();
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float qy = quat1.get1();
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float qz = quat1.get2();
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float qw = quat1.get3();
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float rx = quat2.get0();
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float ry = quat2.get1();
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float rz = quat2.get2();
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float rw = quat2.get3();
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float tx = rw*qx - rz*qy + ry*qz + rx*qw;
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float ty = rw*qy + rz*qx + ry*qw - rx*qz;
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float tz = rw*qz + rz*qw - ry*qx + rx*qy;
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float tw = rw*qw - rz*qz - ry*qy - rx*qx;
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return new Static4D(tx,ty,tz,tw);
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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// rotate 'vector' by quat ( i.e. return quat*vector*(quat^-1) )
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public static Static4D rotateVectorByQuat(Static4D vector, Static4D quat)
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{
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float qx = quat.get0();
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float qy = quat.get1();
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float qz = quat.get2();
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float qw = quat.get3();
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Static4D quatInverted= new Static4D(-qx,-qy,-qz,qw);
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Static4D tmp = quatMultiply(quat,vector);
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return quatMultiply(tmp,quatInverted);
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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// rotate 'vector' by quat^(-1) ( i.e. return (quat^-1)*vector*quat )
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public static Static4D rotateVectorByInvertedQuat(Static4D vector, Static4D quat)
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{
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float qx = quat.get0();
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float qy = quat.get1();
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float qz = quat.get2();
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float qw = quat.get3();
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Static4D quatInverted= new Static4D(-qx,-qy,-qz,qw);
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Static4D tmp = quatMultiply(quatInverted,vector);
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return quatMultiply(tmp,quat);
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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private void addSpeedProbe(float x, float y)
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{
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long currTime = System.currentTimeMillis();
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boolean theSame = mLastIndex==mFirstIndex;
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mLastIndex++;
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if( mLastIndex>=NUM_SPEED_PROBES ) mLastIndex=0;
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mLastT[mLastIndex] = currTime;
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mLastX[mLastIndex] = x;
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mLastY[mLastIndex] = y;
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if( mLastIndex==mFirstIndex)
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{
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mFirstIndex++;
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if( mFirstIndex>=NUM_SPEED_PROBES ) mFirstIndex=0;
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}
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if( theSame )
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{
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mLastT[mFirstIndex] = currTime;
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mLastX[mFirstIndex] = x;
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mLastY[mFirstIndex] = y;
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}
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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private void computeCurrentSpeedInInchesPerSecond()
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{
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long firstTime = mLastT[mFirstIndex];
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long lastTime = mLastT[mLastIndex];
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float fX = mLastX[mFirstIndex];
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float fY = mLastY[mFirstIndex];
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float lX = mLastX[mLastIndex];
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float lY = mLastY[mLastIndex];
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long timeDiff = lastTime-firstTime;
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mLastIndex = 0;
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mFirstIndex= 0;
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mCurrRotSpeed = timeDiff>0 ? 1000*retFingerDragDistanceInInches(fX,fY,lX,lY)/timeDiff : 0;
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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private float retFingerDragDistanceInInches(float xFrom, float yFrom, float xTo, float yTo)
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{
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float xDist = mScreenWidth*(xFrom-xTo);
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float yDist = mScreenHeight*(yFrom-yTo);
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float distInPixels = (float)Math.sqrt(xDist*xDist + yDist*yDist);
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return distInPixels/mDensity;
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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private void setUpDragOrRotate(boolean down, float x, float y)
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{
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int mode = RubikState.getMode();
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if( mode==MODE_DRAG )
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{
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mDragging = true;
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mBeginningRotation = false;
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mContinuingRotation = false;
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}
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else
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{
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Static4D touchPoint1 = new Static4D(x, y, 0, 0);
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Static4D rotatedTouchPoint1= rotateVectorByInvertedQuat(touchPoint1, mQuatAccumulated);
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Static4D rotatedCamera= rotateVectorByInvertedQuat(CAMERA_POINT, mQuatAccumulated);
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if( mMovement!=null && mMovement.faceTouched(rotatedTouchPoint1,rotatedCamera) )
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{
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mDragging = false;
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mContinuingRotation = false;
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if( mode==MODE_ROTATE )
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{
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mBeginningRotation= mPreRender.canRotate();
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}
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else if( mode==MODE_REPLACE )
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{
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mBeginningRotation= false;
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if( down )
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{
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RubikStateSolver solver = (RubikStateSolver) RubikState.SVER.getStateClass();
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mLastCubitFace = mMovement.getTouchedFace();
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float[] point = mMovement.getTouchedPoint3D();
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int color = solver.getCurrentColor();
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RubikObject object = mPreRender.getObject();
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mLastCubit = object.getCubit(point);
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mPreRender.setTextureMap( mLastCubit, mLastCubitFace, color );
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mLastCubitColor = SolverMain.cubitIsLocked(object.getObjectList(), object.getSize(), mLastCubit);
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}
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}
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}
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else
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{
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mDragging = true;
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mBeginningRotation = false;
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mContinuingRotation = false;
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}
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}
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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private void actionDown(float x, float y)
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{
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mX = x;
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mY = y;
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setUpDragOrRotate(true,x,y);
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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private void actionMove(float x, float y)
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{
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if( mBeginningRotation )
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{
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if( retFingerDragDistanceInInches(mX,mY,x,y) > ROTATION_SENSITIVITY )
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{
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mStartRotX = x;
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mStartRotY = y;
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Static4D touchPoint2 = new Static4D(x, y, 0, 0);
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Static4D rotatedTouchPoint2= rotateVectorByInvertedQuat(touchPoint2, mQuatAccumulated);
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Static2D res = mMovement.newRotation(rotatedTouchPoint2);
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RubikObject object = mPreRender.getObject();
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mCurrentAxis = (int)res.get0();
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float offset = res.get1();
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mCurrentRow = (int)(object.returnMultiplier()*offset);
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computeCurrentAxis( object.getRotationAxis()[mCurrentAxis] );
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mRotationFactor = object.returnRotationFactor(offset);
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object.beginNewRotation( mCurrentAxis, mCurrentRow );
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if( RubikState.getCurrentState()==RubikState.READ )
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{
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RubikStateSolving solving = (RubikStateSolving)RubikState.SOLV.getStateClass();
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solving.resetElapsed();
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final RubikActivity act = (RubikActivity)getContext();
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act.runOnUiThread(new Runnable()
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{
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@Override
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public void run()
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{
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RubikState.switchState( act, RubikState.SOLV);
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}
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});
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}
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addSpeedProbe(x,y);
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437
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mBeginningRotation = false;
|
438
|
mContinuingRotation= true;
|
439
|
}
|
440
|
}
|
441
|
else if( mContinuingRotation )
|
442
|
{
|
443
|
float angle = continueRotation(x-mStartRotX,y-mStartRotY);
|
444
|
mCurrentAngle = SWIPING_SENSITIVITY*angle;
|
445
|
mPreRender.getObject().continueRotation(mCurrentAngle);
|
446
|
|
447
|
addSpeedProbe(x,y);
|
448
|
}
|
449
|
else if( mDragging )
|
450
|
{
|
451
|
mTempCurrent.set(quatFromDrag(mX-x,y-mY));
|
452
|
mPreRender.setQuatCurrentOnNextRender();
|
453
|
|
454
|
if( retFingerDragDistanceInInches(mX,mY,x,y) > DIRECTION_SENSITIVITY )
|
455
|
{
|
456
|
mX = x;
|
457
|
mY = y;
|
458
|
mTempAccumulated.set(quatMultiply(mQuatCurrent, mQuatAccumulated));
|
459
|
mTempCurrent.set(0f, 0f, 0f, 1f);
|
460
|
mPreRender.setQuatCurrentOnNextRender();
|
461
|
mPreRender.setQuatAccumulatedOnNextRender();
|
462
|
}
|
463
|
}
|
464
|
else
|
465
|
{
|
466
|
setUpDragOrRotate(false,x,y);
|
467
|
}
|
468
|
}
|
469
|
|
470
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
471
|
|
472
|
private void actionUp()
|
473
|
{
|
474
|
if( mDragging )
|
475
|
{
|
476
|
mTempAccumulated.set(quatMultiply(mQuatCurrent, mQuatAccumulated));
|
477
|
mTempCurrent.set(0f, 0f, 0f, 1f);
|
478
|
mPreRender.setQuatCurrentOnNextRender();
|
479
|
mPreRender.setQuatAccumulatedOnNextRender();
|
480
|
}
|
481
|
|
482
|
if( mContinuingRotation )
|
483
|
{
|
484
|
computeCurrentSpeedInInchesPerSecond();
|
485
|
int angle = mPreRender.getObject().computeNearestAngle(mCurrentAngle, mCurrRotSpeed);
|
486
|
mPreRender.finishRotation(angle);
|
487
|
|
488
|
if( RubikState.getCurrentState()==RubikState.SOLV && angle!=0 )
|
489
|
{
|
490
|
RubikStateSolving solving = (RubikStateSolving)RubikState.SOLV.getStateClass();
|
491
|
solving.addMove(mCurrentAxis, mCurrentRow, angle);
|
492
|
}
|
493
|
}
|
494
|
|
495
|
if( mLastCubitColor>=0 )
|
496
|
{
|
497
|
mPreRender.setTextureMap( mLastCubit, mLastCubitFace, mLastCubitColor );
|
498
|
}
|
499
|
}
|
500
|
|
501
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
502
|
// PUBLIC API
|
503
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
504
|
|
505
|
public RubikSurfaceView(Context context, AttributeSet attrs)
|
506
|
{
|
507
|
super(context,attrs);
|
508
|
|
509
|
if(!isInEditMode())
|
510
|
{
|
511
|
mLastCubitColor = -1;
|
512
|
mCurrRotSpeed = 0.0f;
|
513
|
|
514
|
mLastX = new float[NUM_SPEED_PROBES];
|
515
|
mLastY = new float[NUM_SPEED_PROBES];
|
516
|
mLastT = new long[NUM_SPEED_PROBES];
|
517
|
mFirstIndex =0;
|
518
|
mLastIndex =0;
|
519
|
|
520
|
mRenderer = new RubikRenderer(this);
|
521
|
mPreRender = new RubikPreRender(this);
|
522
|
|
523
|
RubikActivity act = (RubikActivity)context;
|
524
|
DisplayMetrics dm = new DisplayMetrics();
|
525
|
act.getWindowManager().getDefaultDisplay().getMetrics(dm);
|
526
|
|
527
|
mDensity = dm.densityDpi;
|
528
|
|
529
|
final ActivityManager activityManager= (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
|
530
|
|
531
|
if( activityManager!=null )
|
532
|
{
|
533
|
final ConfigurationInfo configurationInfo = activityManager.getDeviceConfigurationInfo();
|
534
|
setEGLContextClientVersion( (configurationInfo.reqGlEsVersion>>16) >= 3 ? 3:2 );
|
535
|
setRenderer(mRenderer);
|
536
|
}
|
537
|
}
|
538
|
}
|
539
|
|
540
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
541
|
|
542
|
@Override
|
543
|
public boolean onTouchEvent(MotionEvent event)
|
544
|
{
|
545
|
int action = event.getAction();
|
546
|
float x = (event.getX() - mScreenWidth*0.5f)/mScreenMin;
|
547
|
float y = (mScreenHeight*0.5f -event.getY())/mScreenMin;
|
548
|
|
549
|
switch(action)
|
550
|
{
|
551
|
case MotionEvent.ACTION_DOWN: actionDown(x,y); break;
|
552
|
case MotionEvent.ACTION_MOVE: actionMove(x,y); break;
|
553
|
case MotionEvent.ACTION_UP : actionUp() ; break;
|
554
|
}
|
555
|
|
556
|
return true;
|
557
|
}
|
558
|
}
|
559
|
|